VBoxServiceControl.cpp@ 105897

Last change on this file since 105897 was 105897, checked in by vboxsync, 3 months ago
Guest Control/VBoxService: Try a bit harder to become the guest control master in case there already is / was another master before (thus getting VERR_RESOURCE_BUSY from the host). Hopefully should help for some testcases.
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File size: 23.6 KB

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1	/* $Id: VBoxServiceControl.cpp 105897 2024-08-29 07:18:56Z vboxsync $ */
2	/** @file
3	* VBoxServiceControl - Host-driven Guest Control.
4	*/
5
6	/*
7	* Copyright (C) 2012-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28	/** @page pg_vgsvc_gstctrl VBoxService - Guest Control
29	*
30	* The Guest Control subservice helps implementing the IGuest APIs.
31	*
32	* The communication between this service (and its children) and IGuest goes
33	* over the HGCM GuestControl service.
34	*
35	* The IGuest APIs provides means to manipulate (control) files, directories,
36	* symbolic links and processes within the guest. Most of these means requires
37	* credentials of a guest OS user to operate, though some restricted ones
38	* operates directly as the VBoxService user (root / system service account).
39	*
40	* The current design is that a subprocess is spawned for handling operations as
41	* a given user. This process is represented as IGuestSession in the API. The
42	* subprocess will be spawned as the given use, giving up the privileges the
43	* parent subservice had.
44	*
45	* It will try handle as many of the operations directly from within the
46	* subprocess, but for more complicated things (or things that haven't yet been
47	* converted), it will spawn a helper process that does the actual work.
48	*
49	* These helpers are the typically modeled on similar unix core utilities, like
50	* mkdir, rm, rmdir, cat and so on. The helper tools can also be launched
51	* directly from VBoxManage by the user by prepending the 'vbox_' prefix to the
52	* unix command.
53	*
54	*/
55
56
57	/*********************************************************************************************************************************
58	* Header Files *
59	*********************************************************************************************************************************/
60	#include <iprt/asm.h>
61	#include <iprt/assert.h>
62	#include <iprt/env.h>
63	#include <iprt/file.h>
64	#include <iprt/getopt.h>
65	#include <iprt/mem.h>
66	#include <iprt/path.h>
67	#include <iprt/process.h>
68	#include <iprt/rand.h>
69	#include <iprt/semaphore.h>
70	#include <iprt/thread.h>
71	#include <VBox/err.h>
72	#include <VBox/VBoxGuestLib.h>
73	#include <VBox/HostServices/GuestControlSvc.h>
74	#include "VBoxServiceInternal.h"
75	#include "VBoxServiceControl.h"
76	#include "VBoxServiceUtils.h"
77
78	using namespace guestControl;
79
80
81	/*********************************************************************************************************************************
82	* Global Variables *
83	*********************************************************************************************************************************/
84	/** The control interval (milliseconds). */
85	static uint32_t g_msControlInterval = 0;
86	/** The semaphore we're blocking our main control thread on. */
87	static RTSEMEVENTMULTI g_hControlEvent = NIL_RTSEMEVENTMULTI;
88	/** The VM session ID. Changes whenever the VM is restored or reset. */
89	static uint64_t g_idControlSession;
90	/** The guest control service client ID. */
91	uint32_t g_idControlSvcClient = 0;
92	/** VBOX_GUESTCTRL_HF_XXX */
93	uint64_t g_fControlHostFeatures0 = 0;
94	#if 0 /** @todo process limit */
95	/** How many started guest processes are kept into memory for supplying
96	* information to the host. Default is 256 processes. If 0 is specified,
97	* the maximum number of processes is unlimited. */
98	static uint32_t g_uControlProcsMaxKept = 256;
99	#endif
100	/** List of guest control session threads (VBOXSERVICECTRLSESSIONTHREAD).
101	* A guest session thread represents a forked guest session process
102	* of VBoxService. */
103	RTLISTANCHOR g_lstControlSessionThreads;
104	/** The local session object used for handling all session-related stuff.
105	* When using the legacy guest control protocol (< 2), this session runs
106	* under behalf of the VBoxService main process. On newer protocol versions
107	* each session is a forked version of VBoxService using the appropriate
108	* user credentials for opening a guest session. These forked sessions then
109	* are kept in VBOXSERVICECTRLSESSIONTHREAD structures. */
110	VBOXSERVICECTRLSESSION g_Session;
111	/** Copy of VbglR3GuestCtrlSupportsOptimizations().*/
112	bool g_fControlSupportsOptimizations = true;
113
114
115	/*********************************************************************************************************************************
116	* Internal Functions *
117	*********************************************************************************************************************************/
118	static int vgsvcGstCtrlHandleSessionOpen(PVBGLR3GUESTCTRLCMDCTX pHostCtx);
119	static int vgsvcGstCtrlHandleSessionClose(PVBGLR3GUESTCTRLCMDCTX pHostCtx);
120	static int vgsvcGstCtrlInvalidate(void);
121	static void vgsvcGstCtrlShutdown(void);
122
123
124	/**
125	* @interface_method_impl{VBOXSERVICE,pfnPreInit}
126	*/
127	static DECLCALLBACK(int) vgsvcGstCtrlPreInit(void)
128	{
129	int rc;
130	#ifdef VBOX_WITH_GUEST_PROPS
131	/*
132	* Read the service options from the VM's guest properties.
133	* Note that these options can be overridden by the command line options later.
134	*/
135	uint32_t uGuestPropSvcClientID;
136	rc = VbglR3GuestPropConnect(&uGuestPropSvcClientID);
137	if (RT_FAILURE(rc))
138	{
139	if (rc == VERR_HGCM_SERVICE_NOT_FOUND) /* Host service is not available. */
140	{
141	VGSvcVerbose(0, "Guest property service is not available, skipping\n");
142	rc = VINF_SUCCESS;
143	}
144	else
145	VGSvcError("Failed to connect to the guest property service, rc=%Rrc\n", rc);
146	}
147	else
148	VbglR3GuestPropDisconnect(uGuestPropSvcClientID);
149
150	if (rc == VERR_NOT_FOUND) /* If a value is not found, don't be sad! */
151	rc = VINF_SUCCESS;
152	#else
153	/* Nothing to do here yet. */
154	rc = VINF_SUCCESS;
155	#endif
156
157	if (RT_SUCCESS(rc))
158	{
159	/* Init session object. */
160	rc = VGSvcGstCtrlSessionInit(&g_Session, 0 /* Flags */);
161	}
162
163	return rc;
164	}
165
166
167	/**
168	* @interface_method_impl{VBOXSERVICE,pfnOption}
169	*/
170	static DECLCALLBACK(int) vgsvcGstCtrlOption(const char ppszShort, int argc, char argv, int *pi)
171	{
172	int rc = -1;
173	if (ppszShort)
174	/* no short options */;
175	else if (!strcmp(argv[*pi], "--control-interval"))
176	rc = VGSvcArgUInt32(argc, argv, "", pi,
177	&g_msControlInterval, 1, UINT32_MAX - 1);
178	#ifdef DEBUG
179	else if (!strcmp(argv[*pi], "--control-dump-stdout"))
180	{
181	g_Session.fFlags \|= VBOXSERVICECTRLSESSION_FLAG_DUMPSTDOUT;
182	rc = 0; /* Flag this command as parsed. */
183	}
184	else if (!strcmp(argv[*pi], "--control-dump-stderr"))
185	{
186	g_Session.fFlags \|= VBOXSERVICECTRLSESSION_FLAG_DUMPSTDERR;
187	rc = 0; /* Flag this command as parsed. */
188	}
189	#endif
190	return rc;
191	}
192
193
194	/**
195	* @interface_method_impl{VBOXSERVICE,pfnInit}
196	*/
197	static DECLCALLBACK(int) vgsvcGstCtrlInit(void)
198	{
199	/*
200	* If not specified, find the right interval default.
201	* Then create the event sem to block on.
202	*/
203	if (!g_msControlInterval)
204	g_msControlInterval = 1000;
205
206	int rc = RTSemEventMultiCreate(&g_hControlEvent);
207	AssertRCReturn(rc, rc);
208
209	VbglR3GetSessionId(&g_idControlSession); /* The status code is ignored as this information is not available with VBox < 3.2.10. */
210
211	RTListInit(&g_lstControlSessionThreads);
212
213	/*
214	* Try connect to the host service and tell it we want to be master (if supported).
215	*/
216	rc = VbglR3GuestCtrlConnect(&g_idControlSvcClient);
217	if (RT_SUCCESS(rc))
218	{
219	rc = vgsvcGstCtrlInvalidate();
220	if (RT_SUCCESS(rc))
221	return rc;
222	}
223	else
224	{
225	/* If the service was not found, we disable this service without
226	causing VBoxService to fail. */
227	if (rc == VERR_HGCM_SERVICE_NOT_FOUND) /* Host service is not available. */
228	{
229	VGSvcVerbose(0, "Guest control service is not available\n");
230	rc = VERR_SERVICE_DISABLED;
231	}
232	else
233	VGSvcError("Failed to connect to the guest control service! Error: %Rrc\n", rc);
234	}
235	RTSemEventMultiDestroy(g_hControlEvent);
236	g_hControlEvent = NIL_RTSEMEVENTMULTI;
237	g_idControlSvcClient = 0;
238	return rc;
239	}
240
241	static int vgsvcGstCtrlInvalidate(void)
242	{
243	VGSvcVerbose(1, "Invalidating configuration ...\n");
244
245	int rc = VINF_SUCCESS;
246
247	g_fControlSupportsOptimizations = VbglR3GuestCtrlSupportsOptimizations(g_idControlSvcClient);
248	if (g_fControlSupportsOptimizations)
249	{
250	for (int i = 0; i < 3; i++)
251	{
252	rc = VbglR3GuestCtrlMakeMeMaster(g_idControlSvcClient);
253	if (RT_SUCCESS(rc))
254	break;
255	RTThreadSleep(RTRandU32Ex(RT_MS_1SEC, RT_MS_5SEC));
256	VGSvcError("Failed to become guest control master (#%d): %Rrc\n", i, rc);
257	}
258	}
259	if (RT_SUCCESS(rc))
260	{
261	VGSvcVerbose(3, "Guest control service client ID=%RU32%s\n",
262	g_idControlSvcClient, g_fControlSupportsOptimizations ? " w/ optimizations" : "");
263
264	/*
265	* Report features to the host.
266	*/
267	const uint64_t fGuestFeatures = VBOX_GUESTCTRL_GF_0_SET_SIZE
268	\| VBOX_GUESTCTRL_GF_0_PROCESS_ARGV0
269	\| VBOX_GUESTCTRL_GF_0_PROCESS_DYNAMIC_SIZES
270	\| VBOX_GUESTCTRL_GF_0_PROCESS_CWD
271	#ifdef VBOX_WITH_GSTCTL_TOOLBOX_AS_CMDS
272	\| VBOX_GUESTCTRL_GF_0_TOOLBOX_AS_CMDS
273	#endif /* VBOX_WITH_GSTCTL_TOOLBOX_AS_CMDS */
274	\| VBOX_GUESTCTRL_GF_0_SHUTDOWN
275	\| VBOX_GUESTCTRL_GF_0_MOUNT_POINTS_ENUM;
276	rc = VbglR3GuestCtrlReportFeatures(g_idControlSvcClient, fGuestFeatures, &g_fControlHostFeatures0);
277	if (RT_SUCCESS(rc))
278	VGSvcVerbose(3, "Host features: %#RX64\n", g_fControlHostFeatures0);
279	else
280	VGSvcVerbose(1, "Warning! Feature reporting failed: %Rrc\n", rc);
281
282	return VINF_SUCCESS;
283	}
284	VGSvcError("Giving up to become guest control master, disconnecting\n");
285	VbglR3GuestCtrlDisconnect(g_idControlSvcClient);
286
287	return rc;
288	}
289
290	/**
291	* @interface_method_impl{VBOXSERVICE,pfnWorker}
292	*/
293	static DECLCALLBACK(int) vgsvcGstCtrlWorker(bool volatile *pfShutdown)
294	{
295	/*
296	* Tell the control thread that it can continue spawning services.
297	*/
298	RTThreadUserSignal(RTThreadSelf());
299	Assert(g_idControlSvcClient > 0);
300
301	/* Allocate a scratch buffer for messages which also send
302	* payload data with them. */
303	uint32_t cbScratchBuf = _64K; /** @todo Make buffer size configurable via guest properties/argv! */
304	AssertReturn(RT_IS_POWER_OF_TWO(cbScratchBuf), VERR_INVALID_PARAMETER);
305	uint8_t pvScratchBuf = (uint8_t)RTMemAlloc(cbScratchBuf);
306	AssertReturn(pvScratchBuf, VERR_NO_MEMORY);
307
308	int rc = VINF_SUCCESS; /* (shut up compiler warnings) */
309	int cRetrievalFailed = 0; /* Number of failed message retrievals in a row. */
310	while (!*pfShutdown)
311	{
312	VGSvcVerbose(3, "GstCtrl: Waiting for host msg ...\n");
313	VBGLR3GUESTCTRLCMDCTX ctxHost = { g_idControlSvcClient, 0 /idContext/, 2 /uProtocol/, 0 /cParms/ };
314	uint32_t idMsg = 0;
315	rc = VbglR3GuestCtrlMsgPeekWait(g_idControlSvcClient, &idMsg, &ctxHost.uNumParms, &g_idControlSession);
316	if (RT_SUCCESS(rc))
317	{
318	cRetrievalFailed = 0; /* Reset failed retrieval count. */
319	VGSvcVerbose(4, "idMsg=%RU32 (%s) (%RU32 parms) retrieved\n",
320	idMsg, GstCtrlHostMsgtoStr((eHostMsg)idMsg), ctxHost.uNumParms);
321
322	/*
323	* Handle the host message.
324	*/
325	switch (idMsg)
326	{
327	case HOST_MSG_CANCEL_PENDING_WAITS:
328	VGSvcVerbose(1, "We were asked to quit ...\n");
329	break;
330
331	case HOST_MSG_SESSION_CREATE:
332	rc = vgsvcGstCtrlHandleSessionOpen(&ctxHost);
333	break;
334
335	/* This message is also sent to the child session process (by the host). */
336	case HOST_MSG_SESSION_CLOSE:
337	rc = vgsvcGstCtrlHandleSessionClose(&ctxHost);
338	break;
339
340	default:
341	if (VbglR3GuestCtrlSupportsOptimizations(g_idControlSvcClient))
342	{
343	rc = VbglR3GuestCtrlMsgSkip(g_idControlSvcClient, VERR_NOT_SUPPORTED, idMsg);
344	VGSvcVerbose(1, "Skipped unexpected message idMsg=%RU32 (%s), cParms=%RU32 (rc=%Rrc)\n",
345	idMsg, GstCtrlHostMsgtoStr((eHostMsg)idMsg), ctxHost.uNumParms, rc);
346	}
347	else
348	{
349	rc = VbglR3GuestCtrlMsgSkipOld(g_idControlSvcClient);
350	VGSvcVerbose(3, "Skipped idMsg=%RU32, cParms=%RU32, rc=%Rrc\n", idMsg, ctxHost.uNumParms, rc);
351	}
352	break;
353	}
354
355	/* Do we need to shutdown? */
356	if (idMsg == HOST_MSG_CANCEL_PENDING_WAITS)
357	break;
358
359	/* Let's sleep for a bit and let others run ... */
360	RTThreadYield();
361	}
362	/*
363	* Handle restore notification from host. All the context IDs (sessions,
364	* files, proceses, etc) are invalidated by a VM restore and must be closed.
365	*/
366	else if (rc == VERR_VM_RESTORED)
367	{
368	VGSvcVerbose(1, "The VM session ID changed (i.e. restored), closing stale root session\n");
369
370	/* Make sure that all other session threads are gone.
371	* This is necessary, as the new VM session (NOT to be confused with guest session!) will re-use
372	* the guest session IDs. */
373	int rc2 = VGSvcGstCtrlSessionThreadDestroyAll(&g_lstControlSessionThreads, 0 /* Flags */);
374	if (RT_FAILURE(rc2))
375	VGSvcError("Closing session threads failed with rc=%Rrc\n", rc2);
376
377	/* Make sure to also close the root session (session 0). */
378	rc2 = VGSvcGstCtrlSessionClose(&g_Session);
379	AssertRC(rc2);
380
381	rc2 = VbglR3GuestCtrlSessionHasChanged(g_idControlSvcClient, g_idControlSession);
382	AssertRC(rc2);
383
384	/* Invalidate the internal state to match the current host we got restored from. */
385	rc2 = vgsvcGstCtrlInvalidate();
386	AssertRC(rc2);
387	}
388	else
389	{
390	/* Note: VERR_GEN_IO_FAILURE seems to be normal if ran into timeout. */
391	/** @todo r=bird: Above comment makes no sense. How can you get a timeout in a blocking HGCM call? */
392	VGSvcError("GstCtrl: Getting host message failed with %Rrc\n", rc);
393
394	/* Check for VM session change. */
395	/** @todo We don't need to check the host here. */
396	uint64_t idNewSession = g_idControlSession;
397	int rc2 = VbglR3GetSessionId(&idNewSession);
398	if ( RT_SUCCESS(rc2)
399	&& (idNewSession != g_idControlSession))
400	{
401	VGSvcVerbose(1, "GstCtrl: The VM session ID changed\n");
402	g_idControlSession = idNewSession;
403
404	/* Close all opened guest sessions -- all context IDs, sessions etc.
405	* are now invalid. */
406	rc2 = VGSvcGstCtrlSessionClose(&g_Session);
407	AssertRC(rc2);
408
409	/* Do a reconnect. */
410	VGSvcVerbose(1, "Reconnecting to HGCM service ...\n");
411	rc2 = VbglR3GuestCtrlConnect(&g_idControlSvcClient);
412	if (RT_SUCCESS(rc2))
413	{
414	VGSvcVerbose(3, "Guest control service client ID=%RU32\n", g_idControlSvcClient);
415	cRetrievalFailed = 0;
416	continue; /* Skip waiting. */
417	}
418	VGSvcError("Unable to re-connect to HGCM service, rc=%Rrc, bailing out\n", rc);
419	break;
420	}
421
422	if (rc == VERR_INTERRUPTED)
423	RTThreadYield(); /* To be on the safe side... */
424	else if (++cRetrievalFailed <= 16) /** @todo Make this configurable? */
425	RTThreadSleep(1000); /* Wait a bit before retrying. */
426	else
427	{
428	VGSvcError("Too many failed attempts in a row to get next message, bailing out\n");
429	break;
430	}
431	}
432	}
433
434	VGSvcVerbose(0, "Guest control service stopped\n");
435
436	/* Delete scratch buffer. */
437	if (pvScratchBuf)
438	RTMemFree(pvScratchBuf);
439
440	VGSvcVerbose(0, "Guest control worker returned with rc=%Rrc\n", rc);
441	return rc;
442	}
443
444
445	static int vgsvcGstCtrlHandleSessionOpen(PVBGLR3GUESTCTRLCMDCTX pHostCtx)
446	{
447	AssertPtrReturn(pHostCtx, VERR_INVALID_POINTER);
448
449	/*
450	* Retrieve the message parameters.
451	*/
452	PVBGLR3GUESTCTRLSESSIONSTARTUPINFO pStartupInfo;
453	int rc = VbglR3GuestCtrlSessionGetOpen(pHostCtx, &pStartupInfo);
454	if (RT_SUCCESS(rc))
455	{
456	/*
457	* Flat out refuse to work with protocol v1 hosts.
458	*/
459	if (pStartupInfo->uProtocol == 2)
460	{
461	pHostCtx->uProtocol = pStartupInfo->uProtocol;
462	VGSvcVerbose(3, "Client ID=%RU32 now is using protocol %RU32\n", pHostCtx->uClientID, pHostCtx->uProtocol);
463
464	/** @todo Someone explain why this code isn't in this file too? v1 support? */
465	rc = VGSvcGstCtrlSessionThreadCreate(&g_lstControlSessionThreads, pStartupInfo, NULL /* ppSessionThread */);
466	/* Report failures to the host (successes are taken care of by the session thread). */
467	}
468	else
469	{
470	VGSvcError("The host wants to use protocol v%u, we only support v2!\n", pStartupInfo->uProtocol);
471	rc = VERR_VERSION_MISMATCH;
472	}
473	if (RT_FAILURE(rc))
474	{
475	int rc2 = VbglR3GuestCtrlSessionNotify(pHostCtx, GUEST_SESSION_NOTIFYTYPE_ERROR, rc);
476	if (RT_FAILURE(rc2))
477	VGSvcError("Reporting session error status on open failed with rc=%Rrc\n", rc2);
478	}
479	}
480	else
481	{
482	VGSvcError("Error fetching parameters for opening guest session: %Rrc\n", rc);
483	VbglR3GuestCtrlMsgSkip(pHostCtx->uClientID, rc, UINT32_MAX);
484	}
485
486	VbglR3GuestCtrlSessionStartupInfoFree(pStartupInfo);
487	pStartupInfo = NULL;
488
489	VGSvcVerbose(3, "Opening a new guest session returned rc=%Rrc\n", rc);
490	return rc;
491	}
492
493
494	static int vgsvcGstCtrlHandleSessionClose(PVBGLR3GUESTCTRLCMDCTX pHostCtx)
495	{
496	AssertPtrReturn(pHostCtx, VERR_INVALID_POINTER);
497
498	uint32_t idSession;
499	uint32_t fFlags;
500	int rc = VbglR3GuestCtrlSessionGetClose(pHostCtx, &fFlags, &idSession);
501	if (RT_SUCCESS(rc))
502	{
503	rc = VERR_NOT_FOUND;
504
505	PVBOXSERVICECTRLSESSIONTHREAD pThread;
506	RTListForEach(&g_lstControlSessionThreads, pThread, VBOXSERVICECTRLSESSIONTHREAD, Node)
507	{
508	if ( pThread->pStartupInfo
509	&& pThread->pStartupInfo->uSessionID == idSession)
510	{
511	rc = VGSvcGstCtrlSessionThreadDestroy(pThread, fFlags);
512	break;
513	}
514	}
515
516	#if 0 /** @todo A bit of a mess here as this message goes to both to this process (master) and the session process. */
517	if (RT_FAILURE(rc))
518	{
519	/* Report back on failure. On success this will be done
520	* by the forked session thread. */
521	int rc2 = VbglR3GuestCtrlSessionNotify(pHostCtx,
522	GUEST_SESSION_NOTIFYTYPE_ERROR, rc);
523	if (RT_FAILURE(rc2))
524	{
525	VGSvcError("Reporting session error status on close failed with rc=%Rrc\n", rc2);
526	if (RT_SUCCESS(rc))
527	rc = rc2;
528	}
529	}
530	#endif
531	VGSvcVerbose(2, "Closing guest session %RU32 returned rc=%Rrc\n", idSession, rc);
532	}
533	else
534	{
535	VGSvcError("Error fetching parameters for closing guest session: %Rrc\n", rc);
536	VbglR3GuestCtrlMsgSkip(pHostCtx->uClientID, rc, UINT32_MAX);
537	}
538	return rc;
539	}
540
541
542	/**
543	* @interface_method_impl{VBOXSERVICE,pfnStop}
544	*/
545	static DECLCALLBACK(void) vgsvcGstCtrlStop(void)
546	{
547	VGSvcVerbose(3, "Stopping ...\n");
548
549	/** @todo Later, figure what to do if we're in RTProcWait(). It's a very
550	* annoying call since doesn't support timeouts in the posix world. */
551	if (g_hControlEvent != NIL_RTSEMEVENTMULTI)
552	RTSemEventMultiSignal(g_hControlEvent);
553
554	/*
555	* Ask the host service to cancel all pending requests for the main
556	* control thread so that we can shutdown properly here.
557	*/
558	if (g_idControlSvcClient)
559	{
560	VGSvcVerbose(3, "Cancelling pending waits (client ID=%u) ...\n",
561	g_idControlSvcClient);
562
563	int rc = VbglR3GuestCtrlCancelPendingWaits(g_idControlSvcClient);
564	if (RT_FAILURE(rc))
565	VGSvcError("Cancelling pending waits failed; rc=%Rrc\n", rc);
566	}
567	}
568
569
570	/**
571	* Destroys all guest process threads which are still active.
572	*/
573	static void vgsvcGstCtrlShutdown(void)
574	{
575	VGSvcVerbose(2, "Shutting down ...\n");
576
577	int rc2 = VGSvcGstCtrlSessionThreadDestroyAll(&g_lstControlSessionThreads, 0 /* Flags */);
578	if (RT_FAILURE(rc2))
579	VGSvcError("Closing session threads failed with rc=%Rrc\n", rc2);
580
581	rc2 = VGSvcGstCtrlSessionClose(&g_Session);
582	if (RT_FAILURE(rc2))
583	VGSvcError("Closing session failed with rc=%Rrc\n", rc2);
584
585	VGSvcVerbose(2, "Shutting down complete\n");
586	}
587
588
589	/**
590	* @interface_method_impl{VBOXSERVICE,pfnTerm}
591	*/
592	static DECLCALLBACK(void) vgsvcGstCtrlTerm(void)
593	{
594	VGSvcVerbose(3, "Terminating ...\n");
595
596	vgsvcGstCtrlShutdown();
597
598	VGSvcVerbose(3, "Disconnecting client ID=%u ...\n", g_idControlSvcClient);
599	VbglR3GuestCtrlDisconnect(g_idControlSvcClient);
600	g_idControlSvcClient = 0;
601
602	if (g_hControlEvent != NIL_RTSEMEVENTMULTI)
603	{
604	RTSemEventMultiDestroy(g_hControlEvent);
605	g_hControlEvent = NIL_RTSEMEVENTMULTI;
606	}
607	}
608
609
610	/**
611	* The 'vminfo' service description.
612	*/
613	VBOXSERVICE g_Control =
614	{
615	/* pszName. */
616	"control",
617	/* pszDescription. */
618	"Host-driven Guest Control",
619	/* pszUsage. */
620	#ifdef DEBUG
621	" [--control-dump-stderr] [--control-dump-stdout]\n"
622	#endif
623	" [--control-interval <ms>]"
624	,
625	/* pszOptions. */
626	#ifdef DEBUG
627	" --control-dump-stderr Dumps all guest proccesses stderr data to the\n"
628	" temporary directory.\n"
629	" --control-dump-stdout Dumps all guest proccesses stdout data to the\n"
630	" temporary directory.\n"
631	#endif
632	" --control-interval Specifies the interval at which to check for\n"
633	" new control messages. The default is 1000 ms.\n"
634	,
635	/* methods */
636	vgsvcGstCtrlPreInit,
637	vgsvcGstCtrlOption,
638	vgsvcGstCtrlInit,
639	vgsvcGstCtrlWorker,
640	vgsvcGstCtrlStop,
641	vgsvcGstCtrlTerm
642	};
643

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source: vbox/trunk/src/VBox/Additions/common/VBoxService/VBoxServiceControl.cpp@ 105897

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