VBoxGuestR3Lib.cpp@ 85584

Last change on this file since 85584 was 82968, checked in by vboxsync, 5 years ago
Copyright year updates by scm.
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1	/* $Id: VBoxGuestR3Lib.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
2	/** @file
3	* VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, Core.
4	*/
5
6	/*
7	* Copyright (C) 2007-2020 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	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*********************************************************************************************************************************
29	* Header Files *
30	*********************************************************************************************************************************/
31	#if defined(RT_OS_WINDOWS)
32	# include <iprt/nt/nt-and-windows.h>
33
34	#elif defined(RT_OS_OS2)
35	# define INCL_BASE
36	# define INCL_ERRORS
37	# include <os2.h>
38
39	#elif defined(RT_OS_DARWIN) \
40	\|\| defined(RT_OS_FREEBSD) \
41	\|\| defined(RT_OS_HAIKU) \
42	\|\| defined(RT_OS_LINUX) \
43	\|\| defined(RT_OS_NETBSD) \
44	\|\| defined(RT_OS_SOLARIS)
45	# include <sys/types.h>
46	# include <sys/stat.h>
47	# if defined(RT_OS_DARWIN) \|\| defined(RT_OS_LINUX) \|\| defined(RT_OS_NETBSD)
48	/** @todo check this on solaris+freebsd as well. */
49	# include <sys/ioctl.h>
50	# endif
51	# if defined(RT_OS_DARWIN)
52	# include <mach/mach_port.h>
53	# include <IOKit/IOKitLib.h>
54	# endif
55	# include <errno.h>
56	# include <unistd.h>
57	#endif
58
59	#include <iprt/assert.h>
60	#include <iprt/asm.h>
61	#include <iprt/err.h>
62	#include <iprt/file.h>
63	#include <iprt/time.h>
64	#include <iprt/string.h>
65	#include <iprt/thread.h>
66	#include <VBox/log.h>
67	#include "VBoxGuestR3LibInternal.h"
68
69	#ifdef VBOX_VBGLR3_XFREE86
70	/* Rather than try to resolve all the header file conflicts, I will just
71	prototype what we need here. */
72	# define XF86_O_RDWR 0x0002
73	typedef void *pointer;
74	extern "C" int xf86open(const char *, int, ...);
75	extern "C" int xf86close(int);
76	extern "C" int xf86ioctl(int, unsigned long, pointer);
77	# define VBOX_VBGLR3_XSERVER
78	#elif defined(VBOX_VBGLR3_XORG)
79	# include <sys/stat.h>
80	# include <fcntl.h>
81	# include <unistd.h>
82	# include <sys/ioctl.h>
83	# define xf86open open
84	# define xf86close close
85	# define xf86ioctl ioctl
86	# define XF86_O_RDWR O_RDWR
87	# define VBOX_VBGLR3_XSERVER
88	#endif
89
90
91	/*********************************************************************************************************************************
92	* Global Variables *
93	*********************************************************************************************************************************/
94	/** The VBoxGuest device handle. */
95	#ifdef VBOX_VBGLR3_XSERVER
96	static int g_File = -1;
97	#elif defined(RT_OS_WINDOWS)
98	static HANDLE g_hFile = INVALID_HANDLE_VALUE;
99	#else
100	static RTFILE g_File = NIL_RTFILE;
101	#endif
102	/** User counter.
103	* A counter of the number of times the library has been initialised, for use with
104	* X.org drivers, where the library may be shared by multiple independent modules
105	* inside a single process space.
106	*/
107	static uint32_t volatile g_cInits = 0;
108	#ifdef RT_OS_DARWIN
109	/** I/O Kit connection handle. */
110	static io_connect_t g_uConnection = 0;
111	#endif
112
113
114
115	/**
116	* Implementation of VbglR3Init and VbglR3InitUser
117	*/
118	static int vbglR3Init(const char *pszDeviceName)
119	{
120	int rc2;
121	uint32_t cInits = ASMAtomicIncU32(&g_cInits);
122	Assert(cInits > 0);
123	if (cInits > 1)
124	{
125	/*
126	* This will fail if two (or more) threads race each other calling VbglR3Init.
127	* However it will work fine for single threaded or otherwise serialized
128	* processed calling us more than once.
129	*/
130	#ifdef RT_OS_WINDOWS
131	if (g_hFile == INVALID_HANDLE_VALUE)
132	#elif !defined (VBOX_VBGLR3_XSERVER)
133	if (g_File == NIL_RTFILE)
134	#else
135	if (g_File == -1)
136	#endif
137	return VERR_INTERNAL_ERROR;
138	return VINF_SUCCESS;
139	}
140	#if defined(RT_OS_WINDOWS)
141	if (g_hFile != INVALID_HANDLE_VALUE)
142	#elif !defined(VBOX_VBGLR3_XSERVER)
143	if (g_File != NIL_RTFILE)
144	#else
145	if (g_File != -1)
146	#endif
147	return VERR_INTERNAL_ERROR;
148
149	#if defined(RT_OS_WINDOWS)
150	/*
151	* Have to use CreateFile here as we want to specify FILE_FLAG_OVERLAPPED
152	* and possible some other bits not available thru iprt/file.h.
153	*/
154	HANDLE hFile = CreateFile(pszDeviceName,
155	GENERIC_READ \| GENERIC_WRITE,
156	FILE_SHARE_READ \| FILE_SHARE_WRITE,
157	NULL,
158	OPEN_EXISTING,
159	FILE_ATTRIBUTE_NORMAL \| FILE_FLAG_OVERLAPPED,
160	NULL);
161
162	if (hFile == INVALID_HANDLE_VALUE)
163	return VERR_OPEN_FAILED;
164	g_hFile = hFile;
165
166	#elif defined(RT_OS_OS2)
167	/*
168	* We might wish to compile this with Watcom, so stick to
169	* the OS/2 APIs all the way. And in any case we have to use
170	* DosDevIOCtl for the requests, why not use Dos* for everything.
171	*/
172	HFILE hf = NULLHANDLE;
173	ULONG ulAction = 0;
174	APIRET rc = DosOpen((PCSZ)pszDeviceName, &hf, &ulAction, 0, FILE_NORMAL,
175	OPEN_ACTION_OPEN_IF_EXISTS,
176	OPEN_FLAGS_FAIL_ON_ERROR \| OPEN_FLAGS_NOINHERIT \| OPEN_SHARE_DENYNONE \| OPEN_ACCESS_READWRITE,
177	NULL);
178	if (rc)
179	return RTErrConvertFromOS2(rc);
180
181	if (hf < 16)
182	{
183	HFILE ahfs[16];
184	unsigned i;
185	for (i = 0; i < RT_ELEMENTS(ahfs); i++)
186	{
187	ahfs[i] = 0xffffffff;
188	rc = DosDupHandle(hf, &ahfs[i]);
189	if (rc)
190	break;
191	}
192
193	if (i-- > 1)
194	{
195	ULONG fulState = 0;
196	rc = DosQueryFHState(ahfs[i], &fulState);
197	if (!rc)
198	{
199	fulState \|= OPEN_FLAGS_NOINHERIT;
200	fulState &= OPEN_FLAGS_WRITE_THROUGH \| OPEN_FLAGS_FAIL_ON_ERROR \| OPEN_FLAGS_NO_CACHE \| OPEN_FLAGS_NOINHERIT; /* Turn off non-participating bits. */
201	rc = DosSetFHState(ahfs[i], fulState);
202	}
203	if (!rc)
204	{
205	rc = DosClose(hf);
206	AssertMsg(!rc, ("%ld\n", rc));
207	hf = ahfs[i];
208	}
209	else
210	i++;
211	while (i-- > 0)
212	DosClose(ahfs[i]);
213	}
214	}
215	g_File = (RTFILE)hf;
216
217	#elif defined(RT_OS_DARWIN)
218	/*
219	* Darwin is kind of special we need to engage the device via I/O first
220	* before we open it via the BSD device node.
221	*/
222	/* IOKit */
223	mach_port_t MasterPort;
224	kern_return_t kr = IOMasterPort(MACH_PORT_NULL, &MasterPort);
225	if (kr != kIOReturnSuccess)
226	{
227	LogRel(("IOMasterPort -> %d\n", kr));
228	return VERR_GENERAL_FAILURE;
229	}
230
231	CFDictionaryRef ClassToMatch = IOServiceMatching("org_virtualbox_VBoxGuest");
232	if (!ClassToMatch)
233	{
234	LogRel(("IOServiceMatching(\"org_virtualbox_VBoxGuest\") failed.\n"));
235	return VERR_GENERAL_FAILURE;
236	}
237
238	io_service_t ServiceObject = IOServiceGetMatchingService(kIOMasterPortDefault, ClassToMatch);
239	if (!ServiceObject)
240	{
241	LogRel(("IOServiceGetMatchingService returned NULL\n"));
242	return VERR_NOT_FOUND;
243	}
244
245	io_connect_t uConnection;
246	kr = IOServiceOpen(ServiceObject, mach_task_self(), VBOXGUEST_DARWIN_IOSERVICE_COOKIE, &uConnection);
247	IOObjectRelease(ServiceObject);
248	if (kr != kIOReturnSuccess)
249	{
250	LogRel(("IOServiceOpen returned %d. Driver open failed.\n", kr));
251	return VERR_OPEN_FAILED;
252	}
253
254	/* Regular unix FD. */
255	RTFILE hFile;
256	int rc = RTFileOpen(&hFile, pszDeviceName, RTFILE_O_READWRITE \| RTFILE_O_OPEN \| RTFILE_O_DENY_NONE);
257	if (RT_FAILURE(rc))
258	{
259	LogRel(("RTFileOpen(%s) returned %Rrc. Driver open failed.\n", pszDeviceName, rc));
260	IOServiceClose(uConnection);
261	return rc;
262	}
263	g_File = hFile;
264	g_uConnection = uConnection;
265
266	#elif defined(VBOX_VBGLR3_XSERVER)
267	int File = xf86open(pszDeviceName, XF86_O_RDWR);
268	if (File == -1)
269	return VERR_OPEN_FAILED;
270	g_File = File;
271
272	#else
273
274	/* The default implementation. (linux, solaris, freebsd, netbsd, haiku) */
275	RTFILE File;
276	int rc = RTFileOpen(&File, pszDeviceName, RTFILE_O_READWRITE \| RTFILE_O_OPEN \| RTFILE_O_DENY_NONE);
277	if (RT_FAILURE(rc))
278	return rc;
279	g_File = File;
280
281	#endif
282
283	/*
284	* Adjust the I/O control interface version.
285	*/
286	{
287	VBGLIOCDRIVERVERSIONINFO VerInfo;
288	VBGLREQHDR_INIT(&VerInfo.Hdr, DRIVER_VERSION_INFO);
289	VerInfo.u.In.uMinVersion = VBGL_IOC_VERSION & UINT32_C(0xffff0000);
290	VerInfo.u.In.uReqVersion = VBGL_IOC_VERSION;
291	VerInfo.u.In.uReserved1 = 0;
292	VerInfo.u.In.uReserved2 = 0;
293	rc2 = vbglR3DoIOCtl(VBGL_IOCTL_DRIVER_VERSION_INFO, &VerInfo.Hdr, sizeof(VerInfo));
294	#ifndef VBOX_VBGLR3_XSERVER
295	AssertRC(rc2); /* otherwise ignored for now*/
296	#endif
297	}
298
299
300	#ifndef VBOX_VBGLR3_XSERVER
301	/*
302	* Create release logger
303	*/
304	PRTLOGGER pReleaseLogger;
305	static const char * const s_apszGroups[] = VBOX_LOGGROUP_NAMES;
306	rc2 = RTLogCreate(&pReleaseLogger, 0, "all", "VBOX_RELEASE_LOG",
307	RT_ELEMENTS(s_apszGroups), &s_apszGroups[0], RTLOGDEST_USER, NULL);
308	/* This may legitimately fail if we are using the mini-runtime. */
309	if (RT_SUCCESS(rc2))
310	RTLogRelSetDefaultInstance(pReleaseLogger);
311	#endif
312
313	return VINF_SUCCESS;
314	}
315
316
317	/**
318	* Open the VBox R3 Guest Library. This should be called by system daemons
319	* and processes.
320	*/
321	VBGLR3DECL(int) VbglR3Init(void)
322	{
323	return vbglR3Init(VBOXGUEST_DEVICE_NAME);
324	}
325
326
327	/**
328	* Open the VBox R3 Guest Library. Equivalent to VbglR3Init, but for user
329	* session processes.
330	*/
331	VBGLR3DECL(int) VbglR3InitUser(void)
332	{
333	return vbglR3Init(VBOXGUEST_USER_DEVICE_NAME);
334	}
335
336
337	VBGLR3DECL(void) VbglR3Term(void)
338	{
339	/*
340	* Decrement the reference count and see if we're the last one out.
341	*/
342	uint32_t cInits = ASMAtomicDecU32(&g_cInits);
343	if (cInits > 0)
344	return;
345	#if !defined(VBOX_VBGLR3_XSERVER)
346	AssertReturnVoid(!cInits);
347
348	# if defined(RT_OS_WINDOWS)
349	HANDLE hFile = g_hFile;
350	g_hFile = INVALID_HANDLE_VALUE;
351	AssertReturnVoid(hFile != INVALID_HANDLE_VALUE);
352	BOOL fRc = CloseHandle(hFile);
353	Assert(fRc); NOREF(fRc);
354
355	# elif defined(RT_OS_OS2)
356	RTFILE File = g_File;
357	g_File = NIL_RTFILE;
358	AssertReturnVoid(File != NIL_RTFILE);
359	APIRET rc = DosClose((uintptr_t)File);
360	AssertMsg(!rc, ("%ld\n", rc));
361
362	#elif defined(RT_OS_DARWIN)
363	io_connect_t uConnection = g_uConnection;
364	RTFILE hFile = g_File;
365	g_uConnection = 0;
366	g_File = NIL_RTFILE;
367	kern_return_t kr = IOServiceClose(uConnection);
368	AssertMsg(kr == kIOReturnSuccess, ("%#x (%d)\n", kr, kr)); NOREF(kr);
369	int rc = RTFileClose(hFile);
370	AssertRC(rc);
371
372	# else /* The IPRT case. */
373	RTFILE File = g_File;
374	g_File = NIL_RTFILE;
375	AssertReturnVoid(File != NIL_RTFILE);
376	int rc = RTFileClose(File);
377	AssertRC(rc);
378	# endif
379
380	#else /* VBOX_VBGLR3_XSERVER */
381	int File = g_File;
382	g_File = -1;
383	if (File == -1)
384	return;
385	xf86close(File);
386	#endif /* VBOX_VBGLR3_XSERVER */
387	}
388
389
390	/**
391	* Internal wrapper around various OS specific ioctl implementations.
392	*
393	* @returns VBox status code as returned by VBoxGuestCommonIOCtl, or
394	* an failure returned by the OS specific ioctl APIs.
395	*
396	* @param uFunction The requested function.
397	* @param pHdr The input and output request buffer.
398	* @param cbReq The size of the request buffer.
399	*/
400	int vbglR3DoIOCtlRaw(uintptr_t uFunction, PVBGLREQHDR pHdr, size_t cbReq)
401	{
402	Assert(cbReq == RT_MAX(pHdr->cbIn, pHdr->cbOut)); RT_NOREF1(cbReq);
403	Assert(pHdr->cbOut != 0);
404
405	#if defined(RT_OS_WINDOWS)
406	# if 0 /def USE_NT_DEVICE_IO_CONTROL_FILE/
407	IO_STATUS_BLOCK Ios;
408	Ios.Status = -1;
409	Ios.Information = 0;
410	NTSTATUS rcNt = NtDeviceIoControlFile(g_hFile, NULL /hEvent/, NULL /pfnApc/, NULL /pvApcCtx/, &Ios,
411	(ULONG)uFunction,
412	pHdr /pvInput /, pHdr->cbIn /* cbInput */,
413	pHdr /pvOutput/, pHdr->cbOut /* cbOutput */);
414	if (NT_SUCCESS(rcNt))
415	{
416	if (NT_SUCCESS(Ios.Status))
417	return VINF_SUCCESS;
418	rcNt = Ios.Status;
419	}
420	return RTErrConvertFromNtStatus(rcNt);
421
422	# else
423	DWORD cbReturned = (ULONG)pHdr->cbOut;
424	if (DeviceIoControl(g_hFile, uFunction, pHdr, pHdr->cbIn, pHdr, cbReturned, &cbReturned, NULL))
425	return 0;
426	return RTErrConvertFromWin32(GetLastError());
427	# endif
428
429	#elif defined(RT_OS_OS2)
430	ULONG cbOS2Parm = cbReq;
431	APIRET rc = DosDevIOCtl((uintptr_t)g_File, VBGL_IOCTL_CATEGORY, uFunction, pHdr, cbReq, &cbOS2Parm, NULL, 0, NULL);
432	if (RT_LIKELY(rc == NO_ERROR))
433	return VINF_SUCCESS;
434	return RTErrConvertFromOS2(rc);
435
436	#elif defined(VBOX_VBGLR3_XSERVER)
437	if (g_File != -1)
438	{
439	if (RT_LIKELY(xf86ioctl((int)g_File, uFunction, pHdr) >= 0))
440	return VINF_SUCCESS;
441	return VERR_FILE_IO_ERROR;
442	}
443	return VERR_INVALID_HANDLE;
444
445	#else
446	if (g_File != NIL_RTFILE)
447	{
448	if (RT_LIKELY(ioctl((int)(intptr_t)g_File, uFunction, pHdr) >= 0))
449	return VINF_SUCCESS;
450	return RTErrConvertFromErrno(errno);
451	}
452	return VERR_INVALID_HANDLE;
453	#endif
454	}
455
456
457	/**
458	* Internal wrapper around various OS specific ioctl implementations, that
459	* returns the status from the header.
460	*
461	* @returns VBox status code as returned by VBoxGuestCommonIOCtl, or
462	* an failure returned by the OS specific ioctl APIs.
463	*
464	* @param uFunction The requested function.
465	* @param pHdr The input and output request buffer.
466	* @param cbReq The size of the request buffer.
467	*/
468	int vbglR3DoIOCtl(uintptr_t uFunction, PVBGLREQHDR pHdr, size_t cbReq)
469	{
470	int rc = vbglR3DoIOCtlRaw(uFunction, pHdr, cbReq);
471	if (RT_SUCCESS(rc))
472	rc = pHdr->rc;
473	return rc;
474	}
475

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source: vbox/trunk/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3Lib.cpp@ 85584

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