ConsoleImplTeleporter.cpp@ 24107

Last change on this file since 24107 was 23904, checked in by vboxsync, 15 years ago
VMM,Main: Fixed bugs related to teleporting a paused VM.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 34.6 KB

Line
1	/* $Id: ConsoleImplTeleporter.cpp 23904 2009-10-20 15:01:56Z vboxsync $ */
2	/** @file
3	* VBox Console COM Class implementation, The Teleporter Part.
4	*/
5
6	/*
7	* Copyright (C) 2009 Sun Microsystems, Inc.
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	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22
23	/*******************************************************************************
24	* Header Files *
25	*******************************************************************************/
26	#include "ConsoleImpl.h"
27	#include "Global.h"
28	#include "Logging.h"
29	#include "ProgressImpl.h"
30
31	#include <iprt/err.h>
32	#include <iprt/rand.h>
33	#include <iprt/tcp.h>
34	#include <iprt/timer.h>
35
36	#include <VBox/vmapi.h>
37	#include <VBox/ssm.h>
38	#include <VBox/err.h>
39	#include <VBox/version.h>
40	#include <VBox/com/string.h>
41
42
43	/*******************************************************************************
44	* Structures and Typedefs *
45	*******************************************************************************/
46	/**
47	* Base class for the teleporter state.
48	*
49	* These classes are used as advanced structs, not as proper classes.
50	*/
51	class TeleporterState
52	{
53	public:
54	ComPtr<Console> mptrConsole;
55	PVM mpVM;
56	ComObjPtr<Progress> mptrProgress;
57	Utf8Str mstrPassword;
58	bool const mfIsSource;
59
60	/** @name stream stuff
61	* @{ */
62	RTSOCKET mhSocket;
63	uint64_t moffStream;
64	uint32_t mcbReadBlock;
65	bool volatile mfStopReading;
66	bool volatile mfEndOfStream;
67	bool volatile mfIOError;
68	/** @} */
69
70	TeleporterState(Console pConsole, PVM pVM, Progress pProgress, bool fIsSource)
71	: mptrConsole(pConsole)
72	, mpVM(pVM)
73	, mptrProgress(pProgress)
74	, mfIsSource(fIsSource)
75	, mhSocket(NIL_RTSOCKET)
76	, moffStream(UINT64_MAX / 2)
77	, mcbReadBlock(0)
78	, mfStopReading(false)
79	, mfEndOfStream(false)
80	, mfIOError(false)
81	{
82	}
83	};
84
85
86	/**
87	* Teleporter state used by the source side.
88	*/
89	class TeleporterStateSrc : public TeleporterState
90	{
91	public:
92	Utf8Str mstrHostname;
93	uint32_t muPort;
94	MachineState_T menmOldMachineState;
95
96	TeleporterStateSrc(Console pConsole, PVM pVM, Progress pProgress, MachineState_T enmOldMachineState)
97	: TeleporterState(pConsole, pVM, pProgress, true /fIsSource/)
98	, muPort(UINT32_MAX)
99	, menmOldMachineState(enmOldMachineState)
100	{
101	}
102	};
103
104
105	/**
106	* Teleporter state used by the destiation side.
107	*/
108	class TeleporterStateTrg : public TeleporterState
109	{
110	public:
111	IMachine *mpMachine;
112	PRTTCPSERVER mhServer;
113	PRTTIMERLR mphTimerLR;
114	bool mfStartPaused;
115	int mRc;
116
117	TeleporterStateTrg(Console pConsole, PVM pVM, Progress pProgress,
118	IMachine *pMachine, PRTTIMERLR phTimerLR, bool fStartPaused)
119	: TeleporterState(pConsole, pVM, pProgress, false /fIsSource/)
120	, mpMachine(pMachine)
121	, mhServer(NULL)
122	, mphTimerLR(phTimerLR)
123	, mfStartPaused(false)
124	, mRc(VINF_SUCCESS)
125	{
126	}
127	};
128
129
130	/**
131	* TCP stream header.
132	*
133	* This is an extra layer for fixing the problem with figuring out when the SSM
134	* stream ends.
135	*/
136	typedef struct TELEPORTERTCPHDR
137	{
138	/** Magic value. */
139	uint32_t u32Magic;
140	/** The size of the data block following this header.
141	* 0 indicates the end of the stream. */
142	uint32_t cb;
143	} TELEPORTERTCPHDR;
144	/** Magic value for TELEPORTERTCPHDR::u32Magic. (Egberto Gismonti Amin) */
145	#define TELEPORTERTCPHDR_MAGIC UINT32_C(0x19471205)
146	/** The max block size. */
147	#define TELEPORTERTCPHDR_MAX_SIZE UINT32_C(0x00fffff8)
148
149
150	/*******************************************************************************
151	* Global Variables *
152	*******************************************************************************/
153	static const char g_szWelcome[] = "VirtualBox-Teleporter-1.0\n";
154
155
156	/**
157	* Reads a string from the socket.
158	*
159	* @returns VBox status code.
160	*
161	* @param pState The teleporter state structure.
162	* @param pszBuf The output buffer.
163	* @param cchBuf The size of the output buffer.
164	*
165	*/
166	static int teleporterTcpReadLine(TeleporterState pState, char pszBuf, size_t cchBuf)
167	{
168	char *pszStart = pszBuf;
169	RTSOCKET Sock = pState->mhSocket;
170
171	AssertReturn(cchBuf > 1, VERR_INTERNAL_ERROR);
172	*pszBuf = '\0';
173
174	/* dead simple approach. */
175	for (;;)
176	{
177	char ch;
178	int rc = RTTcpRead(Sock, &ch, sizeof(ch), NULL);
179	if (RT_FAILURE(rc))
180	{
181	LogRel(("Teleporter: RTTcpRead -> %Rrc while reading string ('%s')\n", rc, pszStart));
182	return rc;
183	}
184	if ( ch == '\n'
185	\|\| ch == '\0')
186	return VINF_SUCCESS;
187	if (cchBuf <= 1)
188	{
189	LogRel(("Teleporter: String buffer overflow: '%s'\n", pszStart));
190	return VERR_BUFFER_OVERFLOW;
191	}
192	*pszBuf++ = ch;
193	*pszBuf = '\0';
194	cchBuf--;
195	}
196	}
197
198
199	/**
200	* Reads an ACK or NACK.
201	*
202	* @returns S_OK on ACK, E_FAIL+setError() on failure or NACK.
203	* @param pState The teleporter source state.
204	* @param pszWhich Which ACK is this this?
205	* @param pszNAckMsg Optional NACK message.
206	*
207	* @remarks the setError laziness forces this to be a Console member.
208	*/
209	HRESULT
210	Console::teleporterSrcReadACK(TeleporterStateSrc pState, const char pszWhich,
211	const char pszNAckMsg /= NULL*/)
212	{
213	char szMsg[128];
214	int vrc = teleporterTcpReadLine(pState, szMsg, sizeof(szMsg));
215	if (RT_FAILURE(vrc))
216	return setError(E_FAIL, tr("Failed reading ACK(%s): %Rrc"), pszWhich, vrc);
217	if (strcmp(szMsg, "ACK"))
218	{
219	if (!strncmp(szMsg, "NACK=", sizeof("NACK=") - 1))
220	{
221	int32_t vrc2;
222	vrc = RTStrToInt32Full(&szMsg[sizeof("NACK=") - 1], 10, &vrc2);
223	if (vrc == VINF_SUCCESS)
224	{
225	if (pszNAckMsg)
226	{
227	LogRel(("Teleporter: %s: NACK=%Rrc (%d)\n", pszWhich, vrc2, vrc2));
228	return setError(E_FAIL, pszNAckMsg);
229	}
230	return setError(E_FAIL, "NACK(%s) - %Rrc (%d)", pszWhich, vrc2, vrc2);
231	}
232	}
233	return setError(E_FAIL, tr("%s: Expected ACK or NACK, got '%s'"), pszWhich, szMsg);
234	}
235	return S_OK;
236	}
237
238
239	/**
240	* Submitts a command to the destination and waits for the ACK.
241	*
242	* @returns S_OK on ACKed command, E_FAIL+setError() on failure.
243	*
244	* @param pState The teleporter source state.
245	* @param pszCommand The command.
246	* @param fWaitForAck Whether to wait for the ACK.
247	*
248	* @remarks the setError laziness forces this to be a Console member.
249	*/
250	HRESULT
251	Console::teleporterSrcSubmitCommand(TeleporterStateSrc pState, const char pszCommand, bool fWaitForAck /= true/)
252	{
253	size_t cchCommand = strlen(pszCommand);
254	int vrc = RTTcpWrite(pState->mhSocket, pszCommand, cchCommand);
255	if (RT_SUCCESS(vrc))
256	vrc = RTTcpWrite(pState->mhSocket, "\n", sizeof("\n") - 1);
257	if (RT_SUCCESS(vrc))
258	vrc = RTTcpFlush(pState->mhSocket);
259	if (RT_FAILURE(vrc))
260	return setError(E_FAIL, tr("Failed writing command '%s': %Rrc"), pszCommand, vrc);
261	if (!fWaitForAck)
262	return S_OK;
263	return teleporterSrcReadACK(pState, pszCommand);
264	}
265
266
267	/**
268	* @copydoc SSMSTRMOPS::pfnWrite
269	*/
270	static DECLCALLBACK(int) teleporterTcpOpWrite(void pvUser, uint64_t offStream, const void pvBuf, size_t cbToWrite)
271	{
272	TeleporterState pState = (TeleporterState )pvUser;
273
274	AssertReturn(cbToWrite > 0, VINF_SUCCESS);
275	AssertReturn(pState->mfIsSource, VERR_INVALID_HANDLE);
276
277	for (;;)
278	{
279	/* Write block header. */
280	TELEPORTERTCPHDR Hdr;
281	Hdr.u32Magic = TELEPORTERTCPHDR_MAGIC;
282	Hdr.cb = RT_MIN(cbToWrite, TELEPORTERTCPHDR_MAX_SIZE);
283	int rc = RTTcpWrite(pState->mhSocket, &Hdr, sizeof(Hdr));
284	if (RT_FAILURE(rc))
285	{
286	LogRel(("Teleporter/TCP: Header write error: %Rrc\n", rc));
287	return rc;
288	}
289
290	/* Write the data. */
291	rc = RTTcpWrite(pState->mhSocket, pvBuf, Hdr.cb);
292	if (RT_FAILURE(rc))
293	{
294	LogRel(("Teleporter/TCP: Data write error: %Rrc (cb=%#x)\n", rc, Hdr.cb));
295	return rc;
296	}
297	pState->moffStream += Hdr.cb;
298	if (Hdr.cb == cbToWrite)
299	return VINF_SUCCESS;
300
301	/* advance */
302	cbToWrite -= Hdr.cb;
303	pvBuf = (uint8_t const *)pvBuf + Hdr.cb;
304	}
305	}
306
307
308	/**
309	* Selects and poll for close condition.
310	*
311	* We can use a relatively high poll timeout here since it's only used to get
312	* us out of error paths. In the normal cause of events, we'll get a
313	* end-of-stream header.
314	*
315	* @returns VBox status code.
316	*
317	* @param pState The teleporter state data.
318	*/
319	static int teleporterTcpReadSelect(TeleporterState *pState)
320	{
321	int rc;
322	do
323	{
324	rc = RTTcpSelectOne(pState->mhSocket, 1000);
325	if (RT_FAILURE(rc) && rc != VERR_TIMEOUT)
326	{
327	pState->mfIOError = true;
328	LogRel(("Teleporter/TCP: Header select error: %Rrc\n", rc));
329	break;
330	}
331	if (pState->mfStopReading)
332	{
333	rc = VERR_EOF;
334	break;
335	}
336	} while (rc == VERR_TIMEOUT);
337	return rc;
338	}
339
340
341	/**
342	* @copydoc SSMSTRMOPS::pfnRead
343	*/
344	static DECLCALLBACK(int) teleporterTcpOpRead(void pvUser, uint64_t offStream, void pvBuf, size_t cbToRead, size_t *pcbRead)
345	{
346	TeleporterState pState = (TeleporterState )pvUser;
347	AssertReturn(!pState->mfIsSource, VERR_INVALID_HANDLE);
348
349	for (;;)
350	{
351	int rc;
352
353	/*
354	* Check for various conditions and may have been signalled.
355	*/
356	if (pState->mfEndOfStream)
357	return VERR_EOF;
358	if (pState->mfStopReading)
359	return VERR_EOF;
360	if (pState->mfIOError)
361	return VERR_IO_GEN_FAILURE;
362
363	/*
364	* If there is no more data in the current block, read the next
365	* block header.
366	*/
367	if (!pState->mcbReadBlock)
368	{
369	rc = teleporterTcpReadSelect(pState);
370	if (RT_FAILURE(rc))
371	return rc;
372	TELEPORTERTCPHDR Hdr;
373	rc = RTTcpRead(pState->mhSocket, &Hdr, sizeof(Hdr), NULL);
374	if (RT_FAILURE(rc))
375	{
376	pState->mfIOError = true;
377	LogRel(("Teleporter/TCP: Header read error: %Rrc\n", rc));
378	return rc;
379	}
380	if ( Hdr.u32Magic != TELEPORTERTCPHDR_MAGIC
381	\|\| Hdr.cb > TELEPORTERTCPHDR_MAX_SIZE)
382	{
383	pState->mfIOError = true;
384	LogRel(("Teleporter/TCP: Invalid block: u32Magic=%#x cb=%#x\n", Hdr.u32Magic, Hdr.cb));
385	return VERR_IO_GEN_FAILURE;
386	}
387
388	pState->mcbReadBlock = Hdr.cb;
389	if (!Hdr.cb)
390	{
391	pState->mfEndOfStream = true;
392	return VERR_EOF;
393	}
394
395	if (pState->mfStopReading)
396	return VERR_EOF;
397	}
398
399	/*
400	* Read more data.
401	*/
402	rc = teleporterTcpReadSelect(pState);
403	if (RT_FAILURE(rc))
404	return rc;
405	size_t cb = RT_MIN(pState->mcbReadBlock, cbToRead);
406	rc = RTTcpRead(pState->mhSocket, pvBuf, cb, pcbRead);
407	if (RT_FAILURE(rc))
408	{
409	pState->mfIOError = true;
410	LogRel(("Teleporter/TCP: Data read error: %Rrc (cb=%#x)\n", rc, cb));
411	return rc;
412	}
413	if (pcbRead)
414	{
415	pState->moffStream += *pcbRead;
416	pState->mcbReadBlock -= *pcbRead;
417	return VINF_SUCCESS;
418	}
419	pState->moffStream += cb;
420	pState->mcbReadBlock -= cb;
421	if (cbToRead == cb)
422	return VINF_SUCCESS;
423
424	/* Advance to the next block. */
425	cbToRead -= cb;
426	pvBuf = (uint8_t *)pvBuf + cb;
427	}
428	}
429
430
431	/**
432	* @copydoc SSMSTRMOPS::pfnSeek
433	*/
434	static DECLCALLBACK(int) teleporterTcpOpSeek(void pvUser, int64_t offSeek, unsigned uMethod, uint64_t poffActual)
435	{
436	return VERR_NOT_SUPPORTED;
437	}
438
439
440	/**
441	* @copydoc SSMSTRMOPS::pfnTell
442	*/
443	static DECLCALLBACK(uint64_t) teleporterTcpOpTell(void *pvUser)
444	{
445	TeleporterState pState = (TeleporterState )pvUser;
446	return pState->moffStream;
447	}
448
449
450	/**
451	* @copydoc SSMSTRMOPS::pfnSize
452	*/
453	static DECLCALLBACK(int) teleporterTcpOpSize(void pvUser, uint64_t pcb)
454	{
455	return VERR_NOT_SUPPORTED;
456	}
457
458
459	/**
460	* @copydoc SSMSTRMOPS::pfnClose
461	*/
462	static DECLCALLBACK(int) teleporterTcpOpClose(void *pvUser)
463	{
464	TeleporterState pState = (TeleporterState )pvUser;
465
466	if (pState->mfIsSource)
467	{
468	TELEPORTERTCPHDR EofHdr = { TELEPORTERTCPHDR_MAGIC, 0 };
469	int rc = RTTcpWrite(pState->mhSocket, &EofHdr, sizeof(EofHdr));
470	if (RT_SUCCESS(rc))
471	rc = RTTcpFlush(pState->mhSocket);
472	if (RT_FAILURE(rc))
473	{
474	LogRel(("Teleporter/TCP: EOF Header write error: %Rrc\n", rc));
475	return rc;
476	}
477	}
478	else
479	{
480	ASMAtomicWriteBool(&pState->mfStopReading, true);
481	RTTcpFlush(pState->mhSocket);
482	}
483
484	return VINF_SUCCESS;
485	}
486
487
488	/**
489	* Method table for a TCP based stream.
490	*/
491	static SSMSTRMOPS const g_teleporterTcpOps =
492	{
493	SSMSTRMOPS_VERSION,
494	teleporterTcpOpWrite,
495	teleporterTcpOpRead,
496	teleporterTcpOpSeek,
497	teleporterTcpOpTell,
498	teleporterTcpOpSize,
499	teleporterTcpOpClose,
500	SSMSTRMOPS_VERSION
501	};
502
503
504	/**
505	* Progress cancelation callback.
506	*/
507	static void teleporterProgressCancelCallback(void *pvUser)
508	{
509	TeleporterState pState = (TeleporterState )pvUser;
510	SSMR3Cancel(pState->mpVM);
511	if (!pState->mfIsSource)
512	{
513	TeleporterStateTrg pStateTrg = (TeleporterStateTrg )pState;
514	RTTcpServerShutdown(pStateTrg->mhServer);
515	}
516	}
517
518	/**
519	* @copydoc PFNVMPROGRESS
520	*/
521	static DECLCALLBACK(int) teleporterProgressCallback(PVM pVM, unsigned uPercent, void *pvUser)
522	{
523	TeleporterState pState = (TeleporterState )pvUser;
524	if (pState->mptrProgress)
525	{
526	HRESULT hrc = pState->mptrProgress->SetCurrentOperationProgress(uPercent);
527	if (FAILED(hrc))
528	{
529	/* check if the failure was caused by cancellation. */
530	BOOL fCancelled;
531	hrc = pState->mptrProgress->COMGETTER(Canceled)(&fCancelled);
532	if (SUCCEEDED(hrc) && fCancelled)
533	{
534	SSMR3Cancel(pState->mpVM);
535	return VERR_SSM_CANCELLED;
536	}
537	}
538	}
539
540	return VINF_SUCCESS;
541	}
542
543
544	/**
545	* @copydoc FNRTTIMERLR
546	*/
547	static DECLCALLBACK(void) teleporterDstTimeout(RTTIMERLR hTimerLR, void *pvUser, uint64_t iTick)
548	{
549	/* This is harmless for any open connections. */
550	RTTcpServerShutdown((PRTTCPSERVER)pvUser);
551	}
552
553
554	/**
555	* Do the teleporter.
556	*
557	* @returns VBox status code.
558	* @param pState The teleporter state.
559	*/
560	HRESULT
561	Console::teleporterSrc(TeleporterStateSrc *pState)
562	{
563	AutoCaller autoCaller(this);
564	CheckComRCReturnRC(autoCaller.rc());
565
566	/*
567	* Wait for Console::Teleport to change the state.
568	*/
569	{ AutoWriteLock autoLock(); }
570
571	BOOL fCancelled = TRUE;
572	HRESULT hrc = pState->mptrProgress->COMGETTER(Canceled)(&fCancelled);
573	if (FAILED(hrc))
574	return hrc;
575	if (fCancelled)
576	return setError(E_FAIL, tr("cancelled"));
577
578	/*
579	* Try connect to the destination machine.
580	* (Note. The caller cleans up mhSocket, so we can return without worries.)
581	*/
582	int vrc = RTTcpClientConnect(pState->mstrHostname.c_str(), pState->muPort, &pState->mhSocket);
583	if (RT_FAILURE(vrc))
584	return setError(E_FAIL, tr("Failed to connect to port %u on '%s': %Rrc"),
585	pState->muPort, pState->mstrHostname.c_str(), vrc);
586
587	/* Read and check the welcome message. */
588	char szLine[RT_MAX(128, sizeof(g_szWelcome))];
589	RT_ZERO(szLine);
590	vrc = RTTcpRead(pState->mhSocket, szLine, sizeof(g_szWelcome) - 1, NULL);
591	if (RT_FAILURE(vrc))
592	return setError(E_FAIL, tr("Failed to read welcome message: %Rrc"), vrc);
593	if (strcmp(szLine, g_szWelcome))
594	return setError(E_FAIL, tr("Unexpected welcome %.*Rhxs"), sizeof(g_szWelcome) - 1, szLine);
595
596	/* password */
597	pState->mstrPassword.append('\n');
598	vrc = RTTcpWrite(pState->mhSocket, pState->mstrPassword.c_str(), pState->mstrPassword.length());
599	if (RT_FAILURE(vrc))
600	return setError(E_FAIL, tr("Failed to send password: %Rrc"), vrc);
601
602	/* ACK */
603	hrc = teleporterSrcReadACK(pState, "password", tr("Invalid password"));
604	if (FAILED(hrc))
605	return hrc;
606
607	/*
608	* Do compatability checks of the VM config and the host hardware.
609	*/
610	/** @todo later
611	* Update: As much as possible will be taken care of by the first snapshot
612	* pass. */
613
614	/*
615	* Start loading the state.
616	*/
617	hrc = teleporterSrcSubmitCommand(pState, "load");
618	if (FAILED(hrc))
619	return hrc;
620
621	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
622	vrc = VMR3Teleport(pState->mpVM, &g_teleporterTcpOps, pvUser, teleporterProgressCallback, pvUser);
623	if (RT_FAILURE(vrc))
624	return setError(E_FAIL, tr("VMR3Teleport -> %Rrc"), vrc);
625
626	hrc = teleporterSrcReadACK(pState, "load-complete");
627	if (FAILED(hrc))
628	return hrc;
629
630	/*
631	* If we're paused, mention this to the target side.
632	*
633	* Note: This means you have to resume the target manually if you pause it
634	* during the teleportation.
635	*/
636	if ( vrc == VINF_SSM_LIVE_SUSPENDED
637	\|\| pState->menmOldMachineState == MachineState_Paused)
638	{
639	hrc = teleporterSrcSubmitCommand(pState, "pause");
640	if (FAILED(hrc))
641	return hrc;
642	}
643
644	/*
645	* State fun? Automatic power off?
646	*/
647	if (!pState->mptrProgress->notifyPointOfNoReturn())
648	{
649	teleporterSrcSubmitCommand(pState, "cancel", false /fWaitForAck/);
650	return E_FAIL;
651	}
652	hrc = teleporterSrcSubmitCommand(pState, "done");
653	if (FAILED(hrc))
654	return hrc;
655
656	return S_OK;
657	}
658
659
660	/**
661	* Static thread method wrapper.
662	*
663	* @returns VINF_SUCCESS (ignored).
664	* @param hThread The thread.
665	* @param pvUser Pointer to a TeleporterStateSrc instance.
666	*/
667	/static/ DECLCALLBACK(int)
668	Console::teleporterSrcThreadWrapper(RTTHREAD hThread, void *pvUser)
669	{
670	TeleporterStateSrc pState = (TeleporterStateSrc )pvUser;
671
672	AutoVMCaller autoVMCaller(pState->mptrConsole);
673	HRESULT hrc = autoVMCaller.rc();
674
675	if (SUCCEEDED(hrc))
676	hrc = pState->mptrConsole->teleporterSrc(pState);
677
678	/* (Ignore the return here as teleporterSrc deals with cancellation.) */
679	pState->mptrProgress->notifyComplete(hrc);
680	pState->mptrProgress->setCancelCallback(NULL, NULL);
681
682	/*
683	* Deal with the state machinery after taking the console object lock.
684	*/
685	AutoWriteLock autoLock(pState->mptrConsole);
686	if (pState->mptrConsole->mMachineState == MachineState_Saving)
687	{
688	VMSTATE enmVMState = VMR3GetState(pState->mpVM);
689	if (SUCCEEDED(hrc))
690	{
691	if (enmVMState == VMSTATE_SUSPENDED)
692	pState->mptrConsole->setMachineState(MachineState_Paused);
693	}
694	else
695	{
696	switch (enmVMState)
697	{
698	case VMSTATE_RUNNING:
699	case VMSTATE_RUNNING_LS:
700	case VMSTATE_DEBUGGING:
701	case VMSTATE_DEBUGGING_LS:
702	case VMSTATE_POWERING_OFF:
703	case VMSTATE_POWERING_OFF_LS:
704	case VMSTATE_RESETTING:
705	case VMSTATE_RESETTING_LS:
706	if (pState->menmOldMachineState == MachineState_Running)
707	pState->mptrConsole->setMachineState(MachineState_Running);
708	else
709	pState->mptrConsole->setMachineState(MachineState_Paused);
710	break;
711	case VMSTATE_GURU_MEDITATION:
712	case VMSTATE_GURU_MEDITATION_LS:
713	pState->mptrConsole->setMachineState(MachineState_Stuck);
714	break;
715	default:
716	AssertMsgFailed(("%s\n", VMR3GetStateName(enmVMState)));
717	case VMSTATE_SUSPENDED:
718	case VMSTATE_SUSPENDED_LS:
719	case VMSTATE_SUSPENDING:
720	case VMSTATE_SUSPENDING_LS:
721	case VMSTATE_SUSPENDING_EXT_LS:
722	pState->mptrConsole->setMachineState(MachineState_Paused);
723	/** @todo somehow make the VMM report back external pause even on error. */
724	autoLock.leave();
725	VMR3Resume(pState->mpVM);
726	break;
727	}
728	}
729	}
730
731	/*
732	* Cleanup.
733	*/
734	if (pState->mhSocket != NIL_RTSOCKET)
735	{
736	RTTcpClientClose(pState->mhSocket);
737	pState->mhSocket = NIL_RTSOCKET;
738	}
739	delete pState;
740
741	return VINF_SUCCESS; /* ignored */
742	}
743
744
745	/**
746	* Start teleporter to the specified target.
747	*
748	* @returns COM status code.
749	*
750	* @param aHostname The name of the target host.
751	* @param aPort The TCP port number.
752	* @param aPassword The password.
753	* @param aProgress Where to return the progress object.
754	*/
755	STDMETHODIMP
756	Console::Teleport(IN_BSTR aHostname, ULONG aPort, IN_BSTR aPassword, IProgress **aProgress)
757	{
758	/*
759	* Validate parameters, check+hold object status, write lock the object
760	* and validate the state.
761	*/
762	CheckComArgOutPointerValid(aProgress);
763	CheckComArgStrNotEmptyOrNull(aHostname);
764	CheckComArgNotNull(aHostname);
765	CheckComArgExprMsg(aPort, aPort > 0 && aPort <= 65535, ("is %u", aPort));
766
767	AutoCaller autoCaller(this);
768	CheckComRCReturnRC(autoCaller.rc());
769
770	AutoWriteLock autoLock(this);
771	LogFlowThisFunc(("mMachineState=%d\n", mMachineState));
772
773	switch (mMachineState)
774	{
775	case MachineState_Running:
776	case MachineState_Paused:
777	break;
778
779	default:
780	return setError(VBOX_E_INVALID_VM_STATE,
781	tr("Invalid machine state: %s (must be Running, Paused or Stuck)"),
782	Global::stringifyMachineState(mMachineState));
783	}
784
785
786	/*
787	* Create a progress object, spawn a worker thread and change the state.
788	* Note! The thread won't start working until we release the lock.
789	*/
790	LogFlowThisFunc(("Initiating TELEPORTER request...\n"));
791
792	ComObjPtr<Progress> ptrProgress;
793	HRESULT hrc = ptrProgress.createObject();
794	CheckComRCReturnRC(hrc);
795	hrc = ptrProgress->init(static_cast<IConsole *>(this),
796	Bstr(tr("Teleporter")),
797	TRUE /aCancelable/);
798	CheckComRCReturnRC(hrc);
799
800	TeleporterStateSrc *pState = new TeleporterStateSrc(this, mpVM, ptrProgress, mMachineState);
801	pState->mstrPassword = aPassword;
802	pState->mstrHostname = aHostname;
803	pState->muPort = aPort;
804
805	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
806	ptrProgress->setCancelCallback(teleporterProgressCancelCallback, pvUser);
807
808	int vrc = RTThreadCreate(NULL, Console::teleporterSrcThreadWrapper, (void )pState, 0 /cbStack*/,
809	RTTHREADTYPE_EMULATION, 0 /fFlags/, "Teleport");
810	if (RT_SUCCESS(vrc))
811	{
812	hrc = setMachineState(MachineState_Saving);
813	if (SUCCEEDED(hrc))
814	ptrProgress.queryInterfaceTo(aProgress);
815	else
816	ptrProgress->Cancel();
817	}
818	else
819	{
820	ptrProgress->setCancelCallback(NULL, NULL);
821	delete pState;
822	hrc = setError(E_FAIL, tr("RTThreadCreate -> %Rrc"), vrc);
823	}
824
825	return hrc;
826	}
827
828
829	/**
830	* Creates a TCP server that listens for the source machine and passes control
831	* over to Console::teleporterTrgServeConnection().
832	*
833	* @returns VBox status code.
834	* @param pVM The VM handle
835	* @param pMachine The IMachine for the virtual machine.
836	* @param fStartPaused Whether to start it in the Paused (true) or
837	* Running (false) state,
838	* @param pProgress Pointer to the progress object.
839	*
840	* @remarks The caller expects error information to be set on failure.
841	* @todo Check that all the possible failure paths sets error info...
842	*/
843	int
844	Console::teleporterTrg(PVM pVM, IMachine pMachine, bool fStartPaused, Progress pProgress)
845	{
846	/*
847	* Get the config.
848	*/
849	ULONG uPort;
850	HRESULT hrc = pMachine->COMGETTER(TeleporterPort)(&uPort);
851	if (FAILED(hrc))
852	return VERR_GENERAL_FAILURE;
853	ULONG const uPortOrg = uPort;
854
855	Bstr bstrAddress;
856	hrc = pMachine->COMGETTER(TeleporterAddress)(bstrAddress.asOutParam());
857	if (FAILED(hrc))
858	return VERR_GENERAL_FAILURE;
859	Utf8Str strAddress(bstrAddress);
860	const char *pszAddress = strAddress.isEmpty() ? NULL : strAddress.c_str();
861
862	Bstr bstrPassword;
863	hrc = pMachine->COMGETTER(TeleporterPassword)(bstrPassword.asOutParam());
864	if (FAILED(hrc))
865	return VERR_GENERAL_FAILURE;
866	Utf8Str strPassword(bstrPassword);
867	strPassword.append('\n'); /* To simplify password checking. */
868
869	/*
870	* Create the TCP server.
871	*/
872	int vrc;
873	PRTTCPSERVER hServer;
874	if (uPort)
875	vrc = RTTcpServerCreateEx(pszAddress, uPort, &hServer);
876	else
877	{
878	for (int cTries = 10240; cTries > 0; cTries--)
879	{
880	uPort = RTRandU32Ex(cTries >= 8192 ? 49152 : 1024, 65534);
881	vrc = RTTcpServerCreateEx(pszAddress, uPort, &hServer);
882	if (vrc != VERR_NET_ADDRESS_IN_USE)
883	break;
884	}
885	if (RT_SUCCESS(vrc))
886	{
887	hrc = pMachine->COMSETTER(TeleporterPort)(uPort);
888	if (FAILED(hrc))
889	{
890	RTTcpServerDestroy(hServer);
891	return VERR_GENERAL_FAILURE;
892	}
893	}
894	}
895	if (RT_FAILURE(vrc))
896	return vrc;
897
898	/*
899	* Create a one-shot timer for timing out after 5 mins.
900	*/
901	RTTIMERLR hTimerLR;
902	vrc = RTTimerLRCreateEx(&hTimerLR, 0 /ns/, RTTIMER_FLAGS_CPU_ANY, teleporterDstTimeout, hServer);
903	if (RT_SUCCESS(vrc))
904	{
905	vrc = RTTimerLRStart(hTimerLR, 560UINT64_C(1000000000) /ns/);
906	if (RT_SUCCESS(vrc))
907	{
908	/*
909	* Do the job, when it returns we're done.
910	*/
911	TeleporterStateTrg State(this, pVM, pProgress, pMachine, &hTimerLR, fStartPaused);
912	State.mstrPassword = strPassword;
913	State.mhServer = hServer;
914
915	void pvUser = static_cast<void >(static_cast<TeleporterState *>(&State));
916	if (pProgress->setCancelCallback(teleporterProgressCancelCallback, pvUser))
917	{
918	vrc = RTTcpServerListen(hServer, Console::teleporterTrgServeConnection, &State);
919	pProgress->setCancelCallback(NULL, NULL);
920
921	bool fPowerOff = false;
922	if (vrc == VERR_TCP_SERVER_STOP)
923	{
924	vrc = State.mRc;
925	if (RT_SUCCESS(vrc))
926	{
927	if (State.mfStartPaused)
928	setMachineState(MachineState_Paused);
929	else
930	vrc = VMR3Resume(pVM);
931	}
932	/* Power off the VM on failure unless the state callback
933	already did that. */
934	else
935	{
936	VMSTATE enmVMState = VMR3GetState(pVM);
937	if ( enmVMState != VMSTATE_OFF
938	&& enmVMState != VMSTATE_POWERING_OFF)
939	fPowerOff = true;
940	}
941	}
942	else if (vrc == VERR_TCP_SERVER_SHUTDOWN)
943	{
944	BOOL fCancelled = TRUE;
945	hrc = pProgress->COMGETTER(Canceled)(&fCancelled);
946	if (FAILED(hrc) \|\| fCancelled)
947	{
948	setError(E_FAIL, tr("Teleporting canceled"));
949	vrc = VERR_SSM_CANCELLED;
950	}
951	else
952	{
953	setError(E_FAIL, tr("Teleporter timed out waiting for incoming connection"));
954	vrc = VERR_TIMEOUT;
955	}
956	LogRel(("Teleporter: RTTcpServerListen aborted - %Rrc\n", vrc));
957	fPowerOff = true;
958	}
959	else
960	{
961	LogRel(("Teleporter: Unexpected RTTcpServerListen rc: %Rrc\n", vrc));
962	vrc = VERR_IPE_UNEXPECTED_STATUS;
963	fPowerOff = true;
964	}
965
966	if (fPowerOff)
967	{
968	int vrc2 = VMR3PowerOff(pVM);
969	AssertRC(vrc2);
970	}
971	}
972	else
973	vrc = VERR_SSM_CANCELLED;
974	}
975
976	RTTimerLRDestroy(hTimerLR);
977	}
978	RTTcpServerDestroy(hServer);
979
980	/*
981	* If we change TeleporterPort above, set it back to it's original
982	* value before returning.
983	*/
984	if (uPortOrg != uPort)
985	pMachine->COMSETTER(TeleporterPort)(uPortOrg);
986
987	return vrc;
988	}
989
990
991	static int teleporterTcpWriteACK(TeleporterStateTrg *pState)
992	{
993	int rc = RTTcpWrite(pState->mhSocket, "ACK\n", sizeof("ACK\n") - 1);
994	if (RT_FAILURE(rc))
995	LogRel(("Teleporter: RTTcpWrite(,ACK,) -> %Rrc\n", rc));
996	RTTcpFlush(pState->mhSocket);
997	return rc;
998	}
999
1000
1001	static int teleporterTcpWriteNACK(TeleporterStateTrg *pState, int32_t rc2)
1002	{
1003	char szMsg[64];
1004	size_t cch = RTStrPrintf(szMsg, sizeof(szMsg), "NACK=%d\n", rc2);
1005	int rc = RTTcpWrite(pState->mhSocket, szMsg, cch);
1006	if (RT_FAILURE(rc))
1007	LogRel(("Teleporter: RTTcpWrite(,%s,%zu) -> %Rrc\n", szMsg, cch, rc));
1008	RTTcpFlush(pState->mhSocket);
1009	return rc;
1010	}
1011
1012
1013	/**
1014	* @copydoc FNRTTCPSERVE
1015	*
1016	* @returns VINF_SUCCESS or VERR_TCP_SERVER_STOP.
1017	*/
1018	/static/ DECLCALLBACK(int)
1019	Console::teleporterTrgServeConnection(RTSOCKET Sock, void *pvUser)
1020	{
1021	TeleporterStateTrg pState = (TeleporterStateTrg )pvUser;
1022	pState->mhSocket = Sock;
1023
1024	/*
1025	* Say hello.
1026	*/
1027	int vrc = RTTcpWrite(Sock, g_szWelcome, sizeof(g_szWelcome) - 1);
1028	if (RT_FAILURE(vrc))
1029	{
1030	LogRel(("Teleporter: Failed to write welcome message: %Rrc\n", vrc));
1031	return VINF_SUCCESS;
1032	}
1033
1034	/*
1035	* Password (includes '\n', see teleporterTrg).
1036	*/
1037	const char *pszPassword = pState->mstrPassword.c_str();
1038	unsigned off = 0;
1039	while (pszPassword[off])
1040	{
1041	char ch;
1042	vrc = RTTcpRead(Sock, &ch, sizeof(ch), NULL);
1043	if ( RT_FAILURE(vrc)
1044	\|\| pszPassword[off] != ch)
1045	{
1046	if (RT_FAILURE(vrc))
1047	LogRel(("Teleporter: Password read failure (off=%u): %Rrc\n", off, vrc));
1048	else
1049	LogRel(("Teleporter: Invalid password (off=%u)\n", off));
1050	teleporterTcpWriteNACK(pState, VERR_AUTHENTICATION_FAILURE);
1051	return VINF_SUCCESS;
1052	}
1053	off++;
1054	}
1055	vrc = teleporterTcpWriteACK(pState);
1056	if (RT_FAILURE(vrc))
1057	return VINF_SUCCESS;
1058
1059	/*
1060	* Stop the server and cancel the timeout timer.
1061	*
1062	* Note! After this point we must return VERR_TCP_SERVER_STOP, while prior
1063	* to it we must not return that value!
1064	*/
1065	RTTcpServerShutdown(pState->mhServer);
1066	RTTimerLRDestroy(*pState->mphTimerLR);
1067	*pState->mphTimerLR = NIL_RTTIMERLR;
1068
1069	/*
1070	* Command processing loop.
1071	*/
1072	for (;;)
1073	{
1074	char szCmd[128];
1075	vrc = teleporterTcpReadLine(pState, szCmd, sizeof(szCmd));
1076	if (RT_FAILURE(vrc))
1077	break;
1078
1079	if (!strcmp(szCmd, "load"))
1080	{
1081	vrc = teleporterTcpWriteACK(pState);
1082	if (RT_FAILURE(vrc))
1083	break;
1084
1085	pState->moffStream = 0;
1086	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
1087	vrc = VMR3LoadFromStream(pState->mpVM, &g_teleporterTcpOps, pvUser,
1088	teleporterProgressCallback, pvUser);
1089	if (RT_FAILURE(vrc))
1090	{
1091	LogRel(("Teleporter: VMR3LoadFromStream -> %Rrc\n", vrc));
1092	teleporterTcpWriteNACK(pState, vrc);
1093	break;
1094	}
1095
1096	/* The EOS might not have been read, make sure it is. */
1097	pState->mfStopReading = false;
1098	size_t cbRead;
1099	vrc = teleporterTcpOpRead(pvUser, pState->moffStream, szCmd, 1, &cbRead);
1100	if (vrc != VERR_EOF)
1101	{
1102	LogRel(("Teleporter: Draining teleporterTcpOpRead -> %Rrc\n", vrc));
1103	teleporterTcpWriteNACK(pState, vrc);
1104	break;
1105	}
1106
1107	vrc = teleporterTcpWriteACK(pState);
1108	}
1109	/** @todo implement config verification and hardware compatability checks. Or
1110	* maybe leave part of these to the saved state machinery?
1111	* Update: We're doing as much as possible in the first SSM pass. */
1112	else if (!strcmp(szCmd, "cancel"))
1113	{
1114	/* Don't ACK this. */
1115	LogRel(("Teleporter: Received cancel command.\n"));
1116	vrc = VERR_SSM_CANCELLED;
1117	}
1118	else if (!strcmp(szCmd, "pause"))
1119	{
1120	pState->mfStartPaused = true;
1121	vrc = teleporterTcpWriteACK(pState);
1122	}
1123	else if (!strcmp(szCmd, "done"))
1124	{
1125	/*
1126	* The ACK is the point of no return.
1127	*/
1128	if (pState->mptrProgress->notifyPointOfNoReturn())
1129	vrc = teleporterTcpWriteACK(pState);
1130	else
1131	{
1132	vrc = VERR_SSM_CANCELLED;
1133	teleporterTcpWriteNACK(pState, vrc);
1134	}
1135	break;
1136	}
1137	else
1138	{
1139	LogRel(("Teleporter: Unknown command '%s' (%.*Rhxs)\n", szCmd, strlen(szCmd), szCmd));
1140	vrc = VERR_NOT_IMPLEMENTED;
1141	teleporterTcpWriteNACK(pState, vrc);
1142	break;
1143	}
1144
1145	if (RT_FAILURE(vrc))
1146	break;
1147	}
1148
1149	pState->mRc = vrc;
1150	pState->mhSocket = NIL_RTSOCKET;
1151	LogFlowFunc(("returns mRc=%Rrc\n", vrc));
1152	return VERR_TCP_SERVER_STOP;
1153	}
1154

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source: vbox/trunk/src/VBox/Main/ConsoleImplTeleporter.cpp@ 24107

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