VirtualBox

source: vbox/trunk/src/VBox/Additions/common/VBoxGuestLib/VBoxGuestR3Lib.cpp@ 49950

Last change on this file since 49950 was 48938, checked in by vboxsync, 11 years ago

Additions/common: Whitespace and svn:keyword cleanups by scm.

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1/* $Id: VBoxGuestR3Lib.cpp 48938 2013-10-07 21:23:57Z vboxsync $ */
2/** @file
3 * VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, Core.
4 */
5
6/*
7 * Copyright (C) 2007-2013 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 * 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 <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_SOLARIS)
44# include <sys/types.h>
45# include <sys/stat.h>
46# if defined(RT_OS_DARWIN) || defined(RT_OS_LINUX) /** @todo check this on solaris+freebsd as well. */
47# include <sys/ioctl.h>
48# endif
49# if defined(RT_OS_DARWIN)
50# include <mach/mach_port.h>
51# include <IOKit/IOKitLib.h>
52# endif
53# include <errno.h>
54# include <unistd.h>
55#endif
56
57#include <iprt/assert.h>
58#include <iprt/asm.h>
59#include <iprt/file.h>
60#include <iprt/time.h>
61#include <iprt/string.h>
62#include <iprt/thread.h>
63#include <VBox/log.h>
64#include "VBGLR3Internal.h"
65
66#ifdef VBOX_VBGLR3_XFREE86
67/* Rather than try to resolve all the header file conflicts, I will just
68 prototype what we need here. */
69# define XF86_O_RDWR 0x0002
70typedef void *pointer;
71extern "C" int xf86open(const char *, int, ...);
72extern "C" int xf86close(int);
73extern "C" int xf86ioctl(int, unsigned long, pointer);
74#endif
75
76
77/*******************************************************************************
78* Global Variables *
79*******************************************************************************/
80/** The VBoxGuest device handle. */
81#ifdef VBOX_VBGLR3_XFREE86
82static int g_File = -1;
83#elif defined(RT_OS_WINDOWS)
84static HANDLE g_hFile = INVALID_HANDLE_VALUE;
85#else
86static RTFILE g_File = NIL_RTFILE;
87#endif
88/** User counter.
89 * A counter of the number of times the library has been initialised, for use with
90 * X.org drivers, where the library may be shared by multiple independent modules
91 * inside a single process space.
92 */
93static uint32_t volatile g_cInits = 0;
94#ifdef RT_OS_DARWIN
95/** I/O Kit connection handle. */
96static io_connect_t g_uConnection = 0;
97#endif
98
99
100
101/**
102 * Implementation of VbglR3Init and VbglR3InitUser
103 */
104static int vbglR3Init(const char *pszDeviceName)
105{
106 uint32_t cInits = ASMAtomicIncU32(&g_cInits);
107 Assert(cInits > 0);
108 if (cInits > 1)
109 {
110 /*
111 * This will fail if two (or more) threads race each other calling VbglR3Init.
112 * However it will work fine for single threaded or otherwise serialized
113 * processed calling us more than once.
114 */
115#ifdef RT_OS_WINDOWS
116 if (g_hFile == INVALID_HANDLE_VALUE)
117#elif !defined (VBOX_VBGLR3_XFREE86)
118 if (g_File == NIL_RTFILE)
119#else
120 if (g_File == -1)
121#endif
122 return VERR_INTERNAL_ERROR;
123 return VINF_SUCCESS;
124 }
125#if defined(RT_OS_WINDOWS)
126 if (g_hFile != INVALID_HANDLE_VALUE)
127#elif !defined(VBOX_VBGLR3_XFREE86)
128 if (g_File != NIL_RTFILE)
129#else
130 if (g_File != -1)
131#endif
132 return VERR_INTERNAL_ERROR;
133
134#if defined(RT_OS_WINDOWS)
135 /*
136 * Have to use CreateFile here as we want to specify FILE_FLAG_OVERLAPPED
137 * and possible some other bits not available thru iprt/file.h.
138 */
139 HANDLE hFile = CreateFile(pszDeviceName,
140 GENERIC_READ | GENERIC_WRITE,
141 FILE_SHARE_READ | FILE_SHARE_WRITE,
142 NULL,
143 OPEN_EXISTING,
144 FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED,
145 NULL);
146
147 if (hFile == INVALID_HANDLE_VALUE)
148 return VERR_OPEN_FAILED;
149 g_hFile = hFile;
150
151#elif defined(RT_OS_OS2)
152 /*
153 * We might wish to compile this with Watcom, so stick to
154 * the OS/2 APIs all the way. And in any case we have to use
155 * DosDevIOCtl for the requests, why not use Dos* for everything.
156 */
157 HFILE hf = NULLHANDLE;
158 ULONG ulAction = 0;
159 APIRET rc = DosOpen((PCSZ)pszDeviceName, &hf, &ulAction, 0, FILE_NORMAL,
160 OPEN_ACTION_OPEN_IF_EXISTS,
161 OPEN_FLAGS_FAIL_ON_ERROR | OPEN_FLAGS_NOINHERIT | OPEN_SHARE_DENYNONE | OPEN_ACCESS_READWRITE,
162 NULL);
163 if (rc)
164 return RTErrConvertFromOS2(rc);
165
166 if (hf < 16)
167 {
168 HFILE ahfs[16];
169 unsigned i;
170 for (i = 0; i < RT_ELEMENTS(ahfs); i++)
171 {
172 ahfs[i] = 0xffffffff;
173 rc = DosDupHandle(hf, &ahfs[i]);
174 if (rc)
175 break;
176 }
177
178 if (i-- > 1)
179 {
180 ULONG fulState = 0;
181 rc = DosQueryFHState(ahfs[i], &fulState);
182 if (!rc)
183 {
184 fulState |= OPEN_FLAGS_NOINHERIT;
185 fulState &= OPEN_FLAGS_WRITE_THROUGH | OPEN_FLAGS_FAIL_ON_ERROR | OPEN_FLAGS_NO_CACHE | OPEN_FLAGS_NOINHERIT; /* Turn off non-participating bits. */
186 rc = DosSetFHState(ahfs[i], fulState);
187 }
188 if (!rc)
189 {
190 rc = DosClose(hf);
191 AssertMsg(!rc, ("%ld\n", rc));
192 hf = ahfs[i];
193 }
194 else
195 i++;
196 while (i-- > 0)
197 DosClose(ahfs[i]);
198 }
199 }
200 g_File = (RTFILE)hf;
201
202#elif defined(RT_OS_DARWIN)
203 /*
204 * Darwin is kind of special we need to engage the device via I/O first
205 * before we open it via the BSD device node.
206 */
207 mach_port_t MasterPort;
208 kern_return_t kr = IOMasterPort(MACH_PORT_NULL, &MasterPort);
209 if (kr != kIOReturnSuccess)
210 return VERR_GENERAL_FAILURE;
211
212 CFDictionaryRef ClassToMatch = IOServiceMatching("org_virtualbox_VBoxGuest");
213 if (!ClassToMatch)
214 return VERR_GENERAL_FAILURE;
215
216 io_service_t ServiceObject = IOServiceGetMatchingService(kIOMasterPortDefault, ClassToMatch);
217 if (!ServiceObject)
218 return VERR_NOT_FOUND;
219
220 io_connect_t uConnection;
221 kr = IOServiceOpen(ServiceObject, mach_task_self(), 0, &uConnection);
222 IOObjectRelease(ServiceObject);
223 if (kr != kIOReturnSuccess)
224 return VERR_OPEN_FAILED;
225
226 RTFILE hFile;
227 int rc = RTFileOpen(&hFile, pszDeviceName, RTFILE_O_READWRITE | RTFILE_O_OPEN | RTFILE_O_DENY_NONE);
228 if (RT_FAILURE(rc))
229 {
230 IOServiceClose(uConnection);
231 return rc;
232 }
233 g_File = hFile;
234 g_uConnection = uConnection;
235
236#elif defined(VBOX_VBGLR3_XFREE86)
237 int File = xf86open(pszDeviceName, XF86_O_RDWR);
238 if (File == -1)
239 return VERR_OPEN_FAILED;
240 g_File = File;
241
242#else
243
244 /* The default implementation. (linux, solaris, freebsd, haiku) */
245 RTFILE File;
246 int rc = RTFileOpen(&File, pszDeviceName, RTFILE_O_READWRITE | RTFILE_O_OPEN | RTFILE_O_DENY_NONE);
247 if (RT_FAILURE(rc))
248 return rc;
249 g_File = File;
250
251#endif
252
253#ifndef VBOX_VBGLR3_XFREE86
254 /*
255 * Create release logger
256 */
257 PRTLOGGER pReleaseLogger;
258 static const char * const s_apszGroups[] = VBOX_LOGGROUP_NAMES;
259 int rc2 = RTLogCreate(&pReleaseLogger, 0, "all", "VBOX_RELEASE_LOG",
260 RT_ELEMENTS(s_apszGroups), &s_apszGroups[0], RTLOGDEST_USER, NULL);
261 /* This may legitimately fail if we are using the mini-runtime. */
262 if (RT_SUCCESS(rc2))
263 RTLogRelSetDefaultInstance(pReleaseLogger);
264#endif
265
266 return VINF_SUCCESS;
267}
268
269
270/**
271 * Open the VBox R3 Guest Library. This should be called by system daemons
272 * and processes.
273 */
274VBGLR3DECL(int) VbglR3Init(void)
275{
276 return vbglR3Init(VBOXGUEST_DEVICE_NAME);
277}
278
279
280/**
281 * Open the VBox R3 Guest Library. Equivalent to VbglR3Init, but for user
282 * session processes.
283 */
284VBGLR3DECL(int) VbglR3InitUser(void)
285{
286 return vbglR3Init(VBOXGUEST_USER_DEVICE_NAME);
287}
288
289
290VBGLR3DECL(void) VbglR3Term(void)
291{
292 /*
293 * Decrement the reference count and see if we're the last one out.
294 */
295 uint32_t cInits = ASMAtomicDecU32(&g_cInits);
296 if (cInits > 0)
297 return;
298#if !defined(VBOX_VBGLR3_XFREE86)
299 AssertReturnVoid(!cInits);
300
301# if defined(RT_OS_WINDOWS)
302 HANDLE hFile = g_hFile;
303 g_hFile = INVALID_HANDLE_VALUE;
304 AssertReturnVoid(hFile != INVALID_HANDLE_VALUE);
305 BOOL fRc = CloseHandle(hFile);
306 Assert(fRc); NOREF(fRc);
307
308# elif defined(RT_OS_OS2)
309 RTFILE File = g_File;
310 g_File = NIL_RTFILE;
311 AssertReturnVoid(File != NIL_RTFILE);
312 APIRET rc = DosClose((uintptr_t)File);
313 AssertMsg(!rc, ("%ld\n", rc));
314
315#elif defined(RT_OS_DARWIN)
316 io_connect_t uConnection = g_uConnection;
317 RTFILE hFile = g_File;
318 g_uConnection = 0;
319 g_File = NIL_RTFILE;
320 kern_return_t kr = IOServiceClose(uConnection);
321 AssertMsg(kr == kIOReturnSuccess, ("%#x (%d)\n", kr, kr));
322 int rc = RTFileClose(hFile);
323 AssertRC(rc);
324
325# else /* The IPRT case. */
326 RTFILE File = g_File;
327 g_File = NIL_RTFILE;
328 AssertReturnVoid(File != NIL_RTFILE);
329 int rc = RTFileClose(File);
330 AssertRC(rc);
331# endif
332
333#else /* VBOX_VBGLR3_XFREE86 */
334 int File = g_File;
335 g_File = -1;
336 if (File == -1)
337 return;
338 xf86close(File);
339#endif /* VBOX_VBGLR3_XFREE86 */
340}
341
342
343/**
344 * Internal wrapper around various OS specific ioctl implementations.
345 *
346 * @returns VBox status code as returned by VBoxGuestCommonIOCtl, or
347 * an failure returned by the OS specific ioctl APIs.
348 *
349 * @param iFunction The requested function.
350 * @param pvData The input and output data buffer.
351 * @param cbData The size of the buffer.
352 *
353 * @remark Exactly how the VBoxGuestCommonIOCtl is ferried back
354 * here is OS specific. On BSD and Darwin we can use errno,
355 * while on OS/2 we use the 2nd buffer of the IOCtl.
356 */
357int vbglR3DoIOCtl(unsigned iFunction, void *pvData, size_t cbData)
358{
359#if defined(RT_OS_WINDOWS)
360 DWORD cbReturned = 0;
361 if (!DeviceIoControl(g_hFile, iFunction, pvData, (DWORD)cbData, pvData, (DWORD)cbData, &cbReturned, NULL))
362 {
363/** @todo The passing of error codes needs to be tested and fixed (as does *all* the other hosts except for
364 * OS/2). The idea is that the VBox status codes in ring-0 should be transferred without loss down to
365 * ring-3. However, it's not vitally important right now (obviously, since the other guys has been
366 * ignoring it for 1+ years now). On Linux and Solaris the transfer is done, but it is currently not
367 * lossless, so still needs fixing. */
368 DWORD LastErr = GetLastError();
369 return RTErrConvertFromWin32(LastErr);
370 }
371
372 return VINF_SUCCESS;
373
374#elif defined(RT_OS_OS2)
375 ULONG cbOS2Parm = cbData;
376 int32_t vrc = VERR_INTERNAL_ERROR;
377 ULONG cbOS2Data = sizeof(vrc);
378 APIRET rc = DosDevIOCtl((uintptr_t)g_File, VBOXGUEST_IOCTL_CATEGORY, iFunction,
379 pvData, cbData, &cbOS2Parm,
380 &vrc, sizeof(vrc), &cbOS2Data);
381 if (RT_LIKELY(!rc))
382 return vrc;
383 return RTErrConvertFromOS2(rc);
384
385#elif defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
386 VBGLBIGREQ Hdr;
387 Hdr.u32Magic = VBGLBIGREQ_MAGIC;
388 Hdr.cbData = cbData;
389 Hdr.pvDataR3 = pvData;
390# if HC_ARCH_BITS == 32
391 Hdr.u32Padding = 0;
392# endif
393
394/** @todo test status code passing! Check that the kernel doesn't do any
395 * error checks using specific errno values, and just pass an VBox
396 * error instead of an errno.h one. Alternatively, extend/redefine the
397 * header with an error code return field (much better alternative
398 * actually). */
399#ifdef VBOX_VBGLR3_XFREE86
400 int rc = xf86ioctl(g_File, iFunction, &Hdr);
401#else
402 if (g_File == NIL_RTFILE)
403 return VERR_INVALID_HANDLE;
404 int rc = ioctl(RTFileToNative(g_File), iFunction, &Hdr);
405#endif
406 if (rc == -1)
407 {
408 rc = errno;
409 return RTErrConvertFromErrno(rc);
410 }
411 return VINF_SUCCESS;
412
413#elif defined(RT_OS_DARWIN) || defined(RT_OS_LINUX)
414# ifdef VBOX_VBGLR3_XFREE86
415 int rc = xf86ioctl((int)g_File, iFunction, pvData);
416# else
417 if (g_File == NIL_RTFILE)
418 return VERR_INVALID_HANDLE;
419 int rc = ioctl(RTFileToNative(g_File), iFunction, pvData);
420# endif
421 if (RT_LIKELY(rc == 0))
422 return VINF_SUCCESS;
423
424 /* Positive values are negated VBox error status codes. */
425 if (rc > 0)
426 rc = -rc;
427 else
428# ifdef VBOX_VBGLR3_XFREE86
429 rc = VERR_FILE_IO_ERROR;
430# else
431 rc = RTErrConvertFromErrno(errno);
432# endif
433 NOREF(cbData);
434 return rc;
435
436#elif defined(RT_OS_HAIKU)
437 /* The ioctl hook in Haiku does take the len parameter when specified,
438 * so just use it. */
439 int rc = ioctl((int)g_File, iFunction, pvData, cbData);
440 if (RT_LIKELY(rc == 0))
441 return VINF_SUCCESS;
442
443 /* Positive values are negated VBox error status codes. */
444 if (rc > 0)
445 rc = -rc;
446 else
447 rc = RTErrConvertFromErrno(errno);
448 return rc;
449
450#elif defined(VBOX_VBGLR3_XFREE86)
451 /* PORTME - This is preferred over the RTFileIOCtl variant below, just be careful with the (int). */
452/** @todo test status code passing! */
453 int rc = xf86ioctl(g_File, iFunction, pvData);
454 if (rc == -1)
455 return VERR_FILE_IO_ERROR; /* This is purely legacy stuff, it has to work and no more. */
456 return VINF_SUCCESS;
457
458#else
459 /* Default implementation - PORTME: Do not use this without testings that passing errors works! */
460/** @todo test status code passing! */
461 int rc2 = VERR_INTERNAL_ERROR;
462 int rc = RTFileIoCtl(g_File, (int)iFunction, pvData, cbData, &rc2);
463 if (RT_SUCCESS(rc))
464 rc = rc2;
465 return rc;
466#endif
467}
468
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