VBoxServiceControl.cpp@ 47622

Last change on this file since 47622 was 47622, checked in by vboxsync, 11 years ago
VBoxService/GuestCtrl: More message filtering for guest session + process threads; message processing not needed there, logging.
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1	/* $Id: VBoxServiceControl.cpp 47622 2013-08-08 21:10:54Z vboxsync $ */
2	/** @file
3	* VBoxServiceControl - Host-driven Guest Control.
4	*/
5
6	/*
7	* Copyright (C) 2012-2013 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
19	/*******************************************************************************
20	* Header Files *
21	*******************************************************************************/
22	#include <iprt/asm.h>
23	#include <iprt/assert.h>
24	#include <iprt/env.h>
25	#include <iprt/file.h>
26	#include <iprt/getopt.h>
27	#include <iprt/mem.h>
28	#include <iprt/path.h>
29	#include <iprt/process.h>
30	#include <iprt/semaphore.h>
31	#include <iprt/thread.h>
32	#include <VBox/VBoxGuestLib.h>
33	#include <VBox/HostServices/GuestControlSvc.h>
34	#include "VBoxServiceInternal.h"
35	#include "VBoxServiceControl.h"
36	#include "VBoxServiceUtils.h"
37
38	using namespace guestControl;
39
40	/*******************************************************************************
41	* Global Variables *
42	*******************************************************************************/
43	/** The control interval (milliseconds). */
44	static uint32_t g_uControlIntervalMS = 0;
45	/** The semaphore we're blocking our main control thread on. */
46	static RTSEMEVENTMULTI g_hControlEvent = NIL_RTSEMEVENTMULTI;
47	/** The VM session ID. Changes whenever the VM is restored or reset. */
48	static uint64_t g_idControlSession;
49	/** The guest control service client ID. */
50	static uint32_t g_uControlSvcClientID = 0;
51	/** How many started guest processes are kept into memory for supplying
52	* information to the host. Default is 256 processes. If 0 is specified,
53	* the maximum number of processes is unlimited. */
54	static uint32_t g_uControlProcsMaxKept = 256;
55	/** List of guest control session threads (VBOXSERVICECTRLSESSIONTHREAD).
56	* A guest session thread represents a forked guest session process
57	* of VBoxService. */
58	RTLISTANCHOR g_lstControlSessionThreads;
59	/** The local session object used for handling all session-related stuff.
60	* When using the legacy guest control protocol (< 2), this session runs
61	* under behalf of the VBoxService main process. On newer protocol versions
62	* each session is a forked version of VBoxService using the appropriate
63	* user credentials for opening a guest session. These forked sessions then
64	* are kept in VBOXSERVICECTRLSESSIONTHREAD structures. */
65	VBOXSERVICECTRLSESSION g_Session;
66
67	/*******************************************************************************
68	* Internal Functions *
69	*******************************************************************************/
70	static int gstcntlHandleSessionOpen(PVBGLR3GUESTCTRLCMDCTX pHostCtx);
71	static int gstcntlHandleSessionClose(PVBGLR3GUESTCTRLCMDCTX pHostCtx);
72	static void VBoxServiceControlShutdown(void);
73
74
75	/** @copydoc VBOXSERVICE::pfnPreInit */
76	static DECLCALLBACK(int) VBoxServiceControlPreInit(void)
77	{
78	int rc;
79	#ifdef VBOX_WITH_GUEST_PROPS
80	/*
81	* Read the service options from the VM's guest properties.
82	* Note that these options can be overridden by the command line options later.
83	*/
84	uint32_t uGuestPropSvcClientID;
85	rc = VbglR3GuestPropConnect(&uGuestPropSvcClientID);
86	if (RT_FAILURE(rc))
87	{
88	if (rc == VERR_HGCM_SERVICE_NOT_FOUND) /* Host service is not available. */
89	{
90	VBoxServiceVerbose(0, "Guest property service is not available, skipping\n");
91	rc = VINF_SUCCESS;
92	}
93	else
94	VBoxServiceError("Failed to connect to the guest property service, rc=%Rrc\n", rc);
95	}
96	else
97	{
98	VbglR3GuestPropDisconnect(uGuestPropSvcClientID);
99	}
100
101	if (rc == VERR_NOT_FOUND) /* If a value is not found, don't be sad! */
102	rc = VINF_SUCCESS;
103	#else
104	/* Nothing to do here yet. */
105	rc = VINF_SUCCESS;
106	#endif
107
108	if (RT_SUCCESS(rc))
109	{
110	/* Init session object. */
111	rc = GstCntlSessionInit(&g_Session, 0 /* Flags */);
112	}
113
114	return rc;
115	}
116
117
118	/** @copydoc VBOXSERVICE::pfnOption */
119	static DECLCALLBACK(int) VBoxServiceControlOption(const char ppszShort, int argc, char argv, int *pi)
120	{
121	int rc = -1;
122	if (ppszShort)
123	/* no short options */;
124	else if (!strcmp(argv[*pi], "--control-interval"))
125	rc = VBoxServiceArgUInt32(argc, argv, "", pi,
126	&g_uControlIntervalMS, 1, UINT32_MAX - 1);
127	#ifdef DEBUG
128	else if (!strcmp(argv[*pi], "--control-dump-stdout"))
129	{
130	g_Session.uFlags \|= VBOXSERVICECTRLSESSION_FLAG_DUMPSTDOUT;
131	rc = 0; /* Flag this command as parsed. */
132	}
133	else if (!strcmp(argv[*pi], "--control-dump-stderr"))
134	{
135	g_Session.uFlags \|= VBOXSERVICECTRLSESSION_FLAG_DUMPSTDERR;
136	rc = 0; /* Flag this command as parsed. */
137	}
138	#endif
139	return rc;
140	}
141
142
143	/** @copydoc VBOXSERVICE::pfnInit */
144	static DECLCALLBACK(int) VBoxServiceControlInit(void)
145	{
146	/*
147	* If not specified, find the right interval default.
148	* Then create the event sem to block on.
149	*/
150	if (!g_uControlIntervalMS)
151	g_uControlIntervalMS = 1000;
152
153	int rc = RTSemEventMultiCreate(&g_hControlEvent);
154	AssertRCReturn(rc, rc);
155
156	VbglR3GetSessionId(&g_idControlSession);
157	/* The status code is ignored as this information is not available with VBox < 3.2.10. */
158
159	if (RT_SUCCESS(rc))
160	rc = VbglR3GuestCtrlConnect(&g_uControlSvcClientID);
161	if (RT_SUCCESS(rc))
162	{
163	VBoxServiceVerbose(3, "Guest control service client ID=%RU32\n",
164	g_uControlSvcClientID);
165
166	/* Init session thread list. */
167	RTListInit(&g_lstControlSessionThreads);
168	}
169	else
170	{
171	/* If the service was not found, we disable this service without
172	causing VBoxService to fail. */
173	if (rc == VERR_HGCM_SERVICE_NOT_FOUND) /* Host service is not available. */
174	{
175	VBoxServiceVerbose(0, "Guest control service is not available\n");
176	rc = VERR_SERVICE_DISABLED;
177	}
178	else
179	VBoxServiceError("Failed to connect to the guest control service! Error: %Rrc\n", rc);
180	RTSemEventMultiDestroy(g_hControlEvent);
181	g_hControlEvent = NIL_RTSEMEVENTMULTI;
182	}
183	return rc;
184	}
185
186
187	/** @copydoc VBOXSERVICE::pfnWorker */
188	DECLCALLBACK(int) VBoxServiceControlWorker(bool volatile *pfShutdown)
189	{
190	/*
191	* Tell the control thread that it can continue
192	* spawning services.
193	*/
194	RTThreadUserSignal(RTThreadSelf());
195	Assert(g_uControlSvcClientID > 0);
196
197	int rc = VINF_SUCCESS;
198
199	/* Allocate a scratch buffer for commands which also send
200	* payload data with them. */
201	uint32_t cbScratchBuf = _64K; /** @todo Make buffer size configurable via guest properties/argv! */
202	AssertReturn(RT_IS_POWER_OF_TWO(cbScratchBuf), VERR_INVALID_PARAMETER);
203	uint8_t pvScratchBuf = (uint8_t)RTMemAlloc(cbScratchBuf);
204	AssertPtrReturn(pvScratchBuf, VERR_NO_MEMORY);
205
206	VBGLR3GUESTCTRLCMDCTX ctxHost = { g_uControlSvcClientID };
207	/* Set default protocol version to 1. */
208	ctxHost.uProtocol = 1;
209
210	for (;;)
211	{
212	VBoxServiceVerbose(3, "Waiting for host msg ...\n");
213	uint32_t uMsg = 0;
214	uint32_t cParms = 0;
215	rc = VbglR3GuestCtrlMsgWaitFor(g_uControlSvcClientID, &uMsg, &cParms);
216	if (rc == VERR_TOO_MUCH_DATA)
217	{
218	#ifdef DEBUG
219	VBoxServiceVerbose(4, "Message requires %ld parameters, but only 2 supplied -- retrying request (no error!)...\n", cParms);
220	#endif
221	rc = VINF_SUCCESS; /* Try to get "real" message in next block below. */
222	}
223	else if (RT_FAILURE(rc))
224	VBoxServiceVerbose(3, "Getting host message failed with %Rrc\n", rc); /* VERR_GEN_IO_FAILURE seems to be normal if ran into timeout. */
225	if (RT_SUCCESS(rc))
226	{
227	#ifdef DEBUG
228	VBoxServiceVerbose(3, "Msg=%RU32 (%RU32 parms) retrieved\n", uMsg, cParms);
229	#endif
230	/* Set number of parameters for current host context. */
231	ctxHost.uNumParms = cParms;
232
233	/* Check for VM session change. */
234	uint64_t idNewSession = g_idControlSession;
235	int rc2 = VbglR3GetSessionId(&idNewSession);
236	if ( RT_SUCCESS(rc2)
237	&& (idNewSession != g_idControlSession))
238	{
239	VBoxServiceVerbose(1, "The VM session ID changed\n");
240	g_idControlSession = idNewSession;
241
242	/* Close all opened guest sessions -- all context IDs, sessions etc.
243	* are now invalid. */
244	rc2 = GstCntlSessionClose(&g_Session);
245	AssertRC(rc2);
246	}
247
248	switch (uMsg)
249	{
250	case HOST_CANCEL_PENDING_WAITS:
251	VBoxServiceVerbose(1, "We were asked to quit ...\n");
252	break;
253
254	case HOST_SESSION_CREATE:
255	rc = gstcntlHandleSessionOpen(&ctxHost);
256	break;
257
258	case HOST_SESSION_CLOSE:
259	rc = gstcntlHandleSessionClose(&ctxHost);
260	break;
261
262	default:
263	{
264	/*
265	* Protocol v1 did not have support for (dedicated)
266	* guest sessions, so all actions need to be performed
267	* under behalf of VBoxService's main executable.
268	*
269	* The global session object then acts as a host for all
270	* started guest processes which bring all their
271	* credentials with them with the actual execution call.
272	*/
273	if (ctxHost.uProtocol == 1)
274	{
275	rc = GstCntlSessionHandler(&g_Session, uMsg, &ctxHost,
276	pvScratchBuf, cbScratchBuf, pfShutdown);
277	}
278	else
279	{
280	/*
281	* ... on newer protocols handling all other commands is
282	* up to the guest session fork of VBoxService, so just
283	* skip all not wanted messages here.
284	*/
285	rc = VbglR3GuestCtrlMsgSkip(g_uControlSvcClientID);
286	VBoxServiceVerbose(3, "Skipping uMsg=%RU32, cParms=%RU32, rc=%Rrc\n",
287	uMsg, cParms, rc);
288	}
289	break;
290	}
291	}
292	}
293
294	/* Do we need to shutdown? */
295	if ( *pfShutdown
296	\|\| (RT_SUCCESS(rc) && uMsg == HOST_CANCEL_PENDING_WAITS))
297	{
298	break;
299	}
300
301	/* Let's sleep for a bit and let others run ... */
302	RTThreadYield();
303	}
304
305	VBoxServiceVerbose(0, "Guest control service stopped\n");
306
307	/* Delete scratch buffer. */
308	if (pvScratchBuf)
309	RTMemFree(pvScratchBuf);
310
311	VBoxServiceVerbose(0, "Guest control worker returned with rc=%Rrc\n", rc);
312	return rc;
313	}
314
315
316	static int gstcntlHandleSessionOpen(PVBGLR3GUESTCTRLCMDCTX pHostCtx)
317	{
318	AssertPtrReturn(pHostCtx, VERR_INVALID_POINTER);
319
320	VBOXSERVICECTRLSESSIONSTARTUPINFO ssInfo = { 0 };
321	int rc = VbglR3GuestCtrlSessionGetOpen(pHostCtx,
322	&ssInfo.uProtocol,
323	ssInfo.szUser, sizeof(ssInfo.szUser),
324	ssInfo.szPassword, sizeof(ssInfo.szPassword),
325	ssInfo.szDomain, sizeof(ssInfo.szDomain),
326	&ssInfo.uFlags, &ssInfo.uSessionID);
327	if (RT_SUCCESS(rc))
328	{
329	/* The session open call has the protocol version the host
330	* wants to use. So update the current protocol version with the one the
331	* host wants to use in subsequent calls. */
332	pHostCtx->uProtocol = ssInfo.uProtocol;
333	VBoxServiceVerbose(3, "Client ID=%RU32 now is using protocol %RU32\n",
334	pHostCtx->uClientID, pHostCtx->uProtocol);
335
336	rc = GstCntlSessionThreadCreate(&g_lstControlSessionThreads,
337	&ssInfo, NULL /* ppSessionThread */);
338	}
339
340	if (RT_FAILURE(rc))
341	{
342	/* Report back on failure. On success this will be done
343	* by the forked session thread. */
344	int rc2 = VbglR3GuestCtrlSessionNotify(pHostCtx,
345	GUEST_SESSION_NOTIFYTYPE_ERROR, rc /* uint32_t vs. int */);
346	if (RT_FAILURE(rc2))
347	VBoxServiceError("Reporting session error status on open failed with rc=%Rrc\n", rc2);
348	}
349
350	VBoxServiceVerbose(3, "Opening a new guest session returned rc=%Rrc\n", rc);
351	return rc;
352	}
353
354
355	static int gstcntlHandleSessionClose(PVBGLR3GUESTCTRLCMDCTX pHostCtx)
356	{
357	AssertPtrReturn(pHostCtx, VERR_INVALID_POINTER);
358
359	uint32_t uSessionID, uFlags;
360	int rc = VbglR3GuestCtrlSessionGetClose(pHostCtx, &uFlags, &uSessionID);
361	if (RT_SUCCESS(rc))
362	{
363	rc = VERR_NOT_FOUND;
364
365	PVBOXSERVICECTRLSESSIONTHREAD pThread;
366	RTListForEach(&g_lstControlSessionThreads, pThread, VBOXSERVICECTRLSESSIONTHREAD, Node)
367	{
368	if (pThread->StartupInfo.uSessionID == uSessionID)
369	{
370	rc = GstCntlSessionThreadDestroy(pThread, uFlags);
371	break;
372	}
373	}
374	#if 0
375	if (RT_FAILURE(rc))
376	{
377	/* Report back on failure. On success this will be done
378	* by the forked session thread. */
379	int rc2 = VbglR3GuestCtrlSessionNotify(pHostCtx,
380	GUEST_SESSION_NOTIFYTYPE_ERROR, rc);
381	if (RT_FAILURE(rc2))
382	{
383	VBoxServiceError("Reporting session error status on close failed with rc=%Rrc\n", rc2);
384	if (RT_SUCCESS(rc))
385	rc = rc2;
386	}
387	}
388	#endif
389	VBoxServiceVerbose(2, "Closing guest session %RU32 returned rc=%Rrc\n",
390	uSessionID, rc);
391	}
392	else
393	VBoxServiceError("Closing guest session failed with rc=%Rrc\n", rc);
394
395	return rc;
396	}
397
398
399	/** @copydoc VBOXSERVICE::pfnStop */
400	static DECLCALLBACK(void) VBoxServiceControlStop(void)
401	{
402	VBoxServiceVerbose(3, "Stopping ...\n");
403
404	/** @todo Later, figure what to do if we're in RTProcWait(). It's a very
405	* annoying call since doesn't support timeouts in the posix world. */
406	if (g_hControlEvent != NIL_RTSEMEVENTMULTI)
407	RTSemEventMultiSignal(g_hControlEvent);
408
409	/*
410	* Ask the host service to cancel all pending requests so that we can
411	* shutdown properly here.
412	*/
413	if (g_uControlSvcClientID)
414	{
415	VBoxServiceVerbose(3, "Cancelling pending waits (client ID=%u) ...\n",
416	g_uControlSvcClientID);
417
418	int rc = VbglR3GuestCtrlCancelPendingWaits(g_uControlSvcClientID);
419	if (RT_FAILURE(rc))
420	VBoxServiceError("Cancelling pending waits failed; rc=%Rrc\n", rc);
421	}
422	}
423
424
425	/**
426	* Destroys all guest process threads which are still active.
427	*/
428	static void VBoxServiceControlShutdown(void)
429	{
430	VBoxServiceVerbose(2, "Shutting down ...\n");
431
432	int rc2 = GstCntlSessionThreadDestroyAll(&g_lstControlSessionThreads,
433	0 /* Flags */);
434	if (RT_FAILURE(rc2))
435	VBoxServiceError("Closing session threads failed with rc=%Rrc\n", rc2);
436
437	rc2 = GstCntlSessionClose(&g_Session);
438	if (RT_FAILURE(rc2))
439	VBoxServiceError("Closing session failed with rc=%Rrc\n", rc2);
440
441	VBoxServiceVerbose(2, "Shutting down complete\n");
442	}
443
444
445	/** @copydoc VBOXSERVICE::pfnTerm */
446	static DECLCALLBACK(void) VBoxServiceControlTerm(void)
447	{
448	VBoxServiceVerbose(3, "Terminating ...\n");
449
450	VBoxServiceControlShutdown();
451
452	VBoxServiceVerbose(3, "Disconnecting client ID=%u ...\n",
453	g_uControlSvcClientID);
454	VbglR3GuestCtrlDisconnect(g_uControlSvcClientID);
455	g_uControlSvcClientID = 0;
456
457	if (g_hControlEvent != NIL_RTSEMEVENTMULTI)
458	{
459	RTSemEventMultiDestroy(g_hControlEvent);
460	g_hControlEvent = NIL_RTSEMEVENTMULTI;
461	}
462	}
463
464
465	/**
466	* The 'vminfo' service description.
467	*/
468	VBOXSERVICE g_Control =
469	{
470	/* pszName. */
471	"control",
472	/* pszDescription. */
473	"Host-driven Guest Control",
474	/* pszUsage. */
475	#ifdef DEBUG
476	" [--control-dump-stderr] [--control-dump-stdout]\n"
477	#endif
478	" [--control-interval <ms>]"
479	,
480	/* pszOptions. */
481	#ifdef DEBUG
482	" --control-dump-stderr Dumps all guest proccesses stderr data to the\n"
483	" temporary directory.\n"
484	" --control-dump-stdout Dumps all guest proccesses stdout data to the\n"
485	" temporary directory.\n"
486	#endif
487	" --control-interval Specifies the interval at which to check for\n"
488	" new control commands. The default is 1000 ms.\n"
489	,
490	/* methods */
491	VBoxServiceControlPreInit,
492	VBoxServiceControlOption,
493	VBoxServiceControlInit,
494	VBoxServiceControlWorker,
495	VBoxServiceControlStop,
496	VBoxServiceControlTerm
497	};
498

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source: vbox/trunk/src/VBox/Additions/common/VBoxService/VBoxServiceControl.cpp@ 47622

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