/* $Id: VBoxGuestR3Lib.cpp $ */ /** @file * VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, Core. */ /* * Copyright (C) 2007-2019 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #if defined(RT_OS_WINDOWS) # include #elif defined(RT_OS_OS2) # define INCL_BASE # define INCL_ERRORS # include #elif defined(RT_OS_DARWIN) \ || defined(RT_OS_FREEBSD) \ || defined(RT_OS_HAIKU) \ || defined(RT_OS_LINUX) \ || defined(RT_OS_NETBSD) \ || defined(RT_OS_SOLARIS) # include # include # if defined(RT_OS_DARWIN) || defined(RT_OS_LINUX) || defined(RT_OS_NETBSD) /** @todo check this on solaris+freebsd as well. */ # include # endif # if defined(RT_OS_DARWIN) # include # include # endif # include # include #endif #include #include #include #include #include #include #include #include #include "VBoxGuestR3LibInternal.h" #ifdef VBOX_VBGLR3_XFREE86 /* Rather than try to resolve all the header file conflicts, I will just prototype what we need here. */ # define XF86_O_RDWR 0x0002 typedef void *pointer; extern "C" int xf86open(const char *, int, ...); extern "C" int xf86close(int); extern "C" int xf86ioctl(int, unsigned long, pointer); # define VBOX_VBGLR3_XSERVER #elif defined(VBOX_VBGLR3_XORG) # include # include # include # include # define xf86open open # define xf86close close # define xf86ioctl ioctl # define XF86_O_RDWR O_RDWR # define VBOX_VBGLR3_XSERVER #endif /********************************************************************************************************************************* * Global Variables * *********************************************************************************************************************************/ /** The VBoxGuest device handle. */ #ifdef VBOX_VBGLR3_XSERVER static int g_File = -1; #elif defined(RT_OS_WINDOWS) static HANDLE g_hFile = INVALID_HANDLE_VALUE; #else static RTFILE g_File = NIL_RTFILE; #endif /** User counter. * A counter of the number of times the library has been initialised, for use with * X.org drivers, where the library may be shared by multiple independent modules * inside a single process space. */ static uint32_t volatile g_cInits = 0; #ifdef RT_OS_DARWIN /** I/O Kit connection handle. */ static io_connect_t g_uConnection = 0; #endif /** * Implementation of VbglR3Init and VbglR3InitUser */ static int vbglR3Init(const char *pszDeviceName) { int rc2; uint32_t cInits = ASMAtomicIncU32(&g_cInits); Assert(cInits > 0); if (cInits > 1) { /* * This will fail if two (or more) threads race each other calling VbglR3Init. * However it will work fine for single threaded or otherwise serialized * processed calling us more than once. */ #ifdef RT_OS_WINDOWS if (g_hFile == INVALID_HANDLE_VALUE) #elif !defined (VBOX_VBGLR3_XSERVER) if (g_File == NIL_RTFILE) #else if (g_File == -1) #endif return VERR_INTERNAL_ERROR; return VINF_SUCCESS; } #if defined(RT_OS_WINDOWS) if (g_hFile != INVALID_HANDLE_VALUE) #elif !defined(VBOX_VBGLR3_XSERVER) if (g_File != NIL_RTFILE) #else if (g_File != -1) #endif return VERR_INTERNAL_ERROR; #if defined(RT_OS_WINDOWS) /* * Have to use CreateFile here as we want to specify FILE_FLAG_OVERLAPPED * and possible some other bits not available thru iprt/file.h. */ HANDLE hFile = CreateFile(pszDeviceName, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL); if (hFile == INVALID_HANDLE_VALUE) return VERR_OPEN_FAILED; g_hFile = hFile; #elif defined(RT_OS_OS2) /* * We might wish to compile this with Watcom, so stick to * the OS/2 APIs all the way. And in any case we have to use * DosDevIOCtl for the requests, why not use Dos* for everything. */ HFILE hf = NULLHANDLE; ULONG ulAction = 0; APIRET rc = DosOpen((PCSZ)pszDeviceName, &hf, &ulAction, 0, FILE_NORMAL, OPEN_ACTION_OPEN_IF_EXISTS, OPEN_FLAGS_FAIL_ON_ERROR | OPEN_FLAGS_NOINHERIT | OPEN_SHARE_DENYNONE | OPEN_ACCESS_READWRITE, NULL); if (rc) return RTErrConvertFromOS2(rc); if (hf < 16) { HFILE ahfs[16]; unsigned i; for (i = 0; i < RT_ELEMENTS(ahfs); i++) { ahfs[i] = 0xffffffff; rc = DosDupHandle(hf, &ahfs[i]); if (rc) break; } if (i-- > 1) { ULONG fulState = 0; rc = DosQueryFHState(ahfs[i], &fulState); if (!rc) { fulState |= OPEN_FLAGS_NOINHERIT; fulState &= OPEN_FLAGS_WRITE_THROUGH | OPEN_FLAGS_FAIL_ON_ERROR | OPEN_FLAGS_NO_CACHE | OPEN_FLAGS_NOINHERIT; /* Turn off non-participating bits. */ rc = DosSetFHState(ahfs[i], fulState); } if (!rc) { rc = DosClose(hf); AssertMsg(!rc, ("%ld\n", rc)); hf = ahfs[i]; } else i++; while (i-- > 0) DosClose(ahfs[i]); } } g_File = (RTFILE)hf; #elif defined(RT_OS_DARWIN) /* * Darwin is kind of special we need to engage the device via I/O first * before we open it via the BSD device node. */ /* IOKit */ mach_port_t MasterPort; kern_return_t kr = IOMasterPort(MACH_PORT_NULL, &MasterPort); if (kr != kIOReturnSuccess) { LogRel(("IOMasterPort -> %d\n", kr)); return VERR_GENERAL_FAILURE; } CFDictionaryRef ClassToMatch = IOServiceMatching("org_virtualbox_VBoxGuest"); if (!ClassToMatch) { LogRel(("IOServiceMatching(\"org_virtualbox_VBoxGuest\") failed.\n")); return VERR_GENERAL_FAILURE; } io_service_t ServiceObject = IOServiceGetMatchingService(kIOMasterPortDefault, ClassToMatch); if (!ServiceObject) { LogRel(("IOServiceGetMatchingService returned NULL\n")); return VERR_NOT_FOUND; } io_connect_t uConnection; kr = IOServiceOpen(ServiceObject, mach_task_self(), VBOXGUEST_DARWIN_IOSERVICE_COOKIE, &uConnection); IOObjectRelease(ServiceObject); if (kr != kIOReturnSuccess) { LogRel(("IOServiceOpen returned %d. Driver open failed.\n", kr)); return VERR_OPEN_FAILED; } /* Regular unix FD. */ RTFILE hFile; int rc = RTFileOpen(&hFile, pszDeviceName, RTFILE_O_READWRITE | RTFILE_O_OPEN | RTFILE_O_DENY_NONE); if (RT_FAILURE(rc)) { LogRel(("RTFileOpen(%s) returned %Rrc. Driver open failed.\n", pszDeviceName, rc)); IOServiceClose(uConnection); return rc; } g_File = hFile; g_uConnection = uConnection; #elif defined(VBOX_VBGLR3_XSERVER) int File = xf86open(pszDeviceName, XF86_O_RDWR); if (File == -1) return VERR_OPEN_FAILED; g_File = File; #else /* The default implementation. (linux, solaris, freebsd, netbsd, haiku) */ RTFILE File; int rc = RTFileOpen(&File, pszDeviceName, RTFILE_O_READWRITE | RTFILE_O_OPEN | RTFILE_O_DENY_NONE); if (RT_FAILURE(rc)) return rc; g_File = File; #endif /* * Adjust the I/O control interface version. */ { VBGLIOCDRIVERVERSIONINFO VerInfo; VBGLREQHDR_INIT(&VerInfo.Hdr, DRIVER_VERSION_INFO); VerInfo.u.In.uMinVersion = VBGL_IOC_VERSION & UINT32_C(0xffff0000); VerInfo.u.In.uReqVersion = VBGL_IOC_VERSION; VerInfo.u.In.uReserved1 = 0; VerInfo.u.In.uReserved2 = 0; rc2 = vbglR3DoIOCtl(VBGL_IOCTL_DRIVER_VERSION_INFO, &VerInfo.Hdr, sizeof(VerInfo)); #ifndef VBOX_VBGLR3_XSERVER AssertRC(rc2); /* otherwise ignored for now*/ #endif } #ifndef VBOX_VBGLR3_XSERVER /* * Create release logger */ PRTLOGGER pReleaseLogger; static const char * const s_apszGroups[] = VBOX_LOGGROUP_NAMES; rc2 = RTLogCreate(&pReleaseLogger, 0, "all", "VBOX_RELEASE_LOG", RT_ELEMENTS(s_apszGroups), &s_apszGroups[0], RTLOGDEST_USER, NULL); /* This may legitimately fail if we are using the mini-runtime. */ if (RT_SUCCESS(rc2)) RTLogRelSetDefaultInstance(pReleaseLogger); #endif return VINF_SUCCESS; } /** * Open the VBox R3 Guest Library. This should be called by system daemons * and processes. */ VBGLR3DECL(int) VbglR3Init(void) { return vbglR3Init(VBOXGUEST_DEVICE_NAME); } /** * Open the VBox R3 Guest Library. Equivalent to VbglR3Init, but for user * session processes. */ VBGLR3DECL(int) VbglR3InitUser(void) { return vbglR3Init(VBOXGUEST_USER_DEVICE_NAME); } VBGLR3DECL(void) VbglR3Term(void) { /* * Decrement the reference count and see if we're the last one out. */ uint32_t cInits = ASMAtomicDecU32(&g_cInits); if (cInits > 0) return; #if !defined(VBOX_VBGLR3_XSERVER) AssertReturnVoid(!cInits); # if defined(RT_OS_WINDOWS) HANDLE hFile = g_hFile; g_hFile = INVALID_HANDLE_VALUE; AssertReturnVoid(hFile != INVALID_HANDLE_VALUE); BOOL fRc = CloseHandle(hFile); Assert(fRc); NOREF(fRc); # elif defined(RT_OS_OS2) RTFILE File = g_File; g_File = NIL_RTFILE; AssertReturnVoid(File != NIL_RTFILE); APIRET rc = DosClose((uintptr_t)File); AssertMsg(!rc, ("%ld\n", rc)); #elif defined(RT_OS_DARWIN) io_connect_t uConnection = g_uConnection; RTFILE hFile = g_File; g_uConnection = 0; g_File = NIL_RTFILE; kern_return_t kr = IOServiceClose(uConnection); AssertMsg(kr == kIOReturnSuccess, ("%#x (%d)\n", kr, kr)); NOREF(kr); int rc = RTFileClose(hFile); AssertRC(rc); # else /* The IPRT case. */ RTFILE File = g_File; g_File = NIL_RTFILE; AssertReturnVoid(File != NIL_RTFILE); int rc = RTFileClose(File); AssertRC(rc); # endif #else /* VBOX_VBGLR3_XSERVER */ int File = g_File; g_File = -1; if (File == -1) return; xf86close(File); #endif /* VBOX_VBGLR3_XSERVER */ } /** * Internal wrapper around various OS specific ioctl implementations. * * @returns VBox status code as returned by VBoxGuestCommonIOCtl, or * an failure returned by the OS specific ioctl APIs. * * @param uFunction The requested function. * @param pHdr The input and output request buffer. * @param cbReq The size of the request buffer. */ int vbglR3DoIOCtlRaw(uintptr_t uFunction, PVBGLREQHDR pHdr, size_t cbReq) { Assert(cbReq == RT_MAX(pHdr->cbIn, pHdr->cbOut)); RT_NOREF1(cbReq); Assert(pHdr->cbOut != 0); #if defined(RT_OS_WINDOWS) # if 0 /*def USE_NT_DEVICE_IO_CONTROL_FILE*/ IO_STATUS_BLOCK Ios; Ios.Status = -1; Ios.Information = 0; NTSTATUS rcNt = NtDeviceIoControlFile(g_hFile, NULL /*hEvent*/, NULL /*pfnApc*/, NULL /*pvApcCtx*/, &Ios, (ULONG)uFunction, pHdr /*pvInput */, pHdr->cbIn /* cbInput */, pHdr /*pvOutput*/, pHdr->cbOut /* cbOutput */); if (NT_SUCCESS(rcNt)) { if (NT_SUCCESS(Ios.Status)) return VINF_SUCCESS; rcNt = Ios.Status; } return RTErrConvertFromNtStatus(rcNt); # else DWORD cbReturned = (ULONG)pHdr->cbOut; if (DeviceIoControl(g_hFile, uFunction, pHdr, pHdr->cbIn, pHdr, cbReturned, &cbReturned, NULL)) return 0; return RTErrConvertFromWin32(GetLastError()); # endif #elif defined(RT_OS_OS2) ULONG cbOS2Parm = cbReq; APIRET rc = DosDevIOCtl((uintptr_t)g_File, VBGL_IOCTL_CATEGORY, uFunction, pHdr, cbReq, &cbOS2Parm, NULL, 0, NULL); if (RT_LIKELY(rc == NO_ERROR)) return VINF_SUCCESS; return RTErrConvertFromOS2(rc); #elif defined(VBOX_VBGLR3_XSERVER) if (g_File != -1) { if (RT_LIKELY(xf86ioctl((int)g_File, uFunction, pHdr) >= 0)) return VINF_SUCCESS; return VERR_FILE_IO_ERROR; } return VERR_INVALID_HANDLE; #else if (g_File != NIL_RTFILE) { if (RT_LIKELY(ioctl((int)(intptr_t)g_File, uFunction, pHdr) >= 0)) return VINF_SUCCESS; return RTErrConvertFromErrno(errno); } return VERR_INVALID_HANDLE; #endif } /** * Internal wrapper around various OS specific ioctl implementations, that * returns the status from the header. * * @returns VBox status code as returned by VBoxGuestCommonIOCtl, or * an failure returned by the OS specific ioctl APIs. * * @param uFunction The requested function. * @param pHdr The input and output request buffer. * @param cbReq The size of the request buffer. */ int vbglR3DoIOCtl(uintptr_t uFunction, PVBGLREQHDR pHdr, size_t cbReq) { int rc = vbglR3DoIOCtlRaw(uFunction, pHdr, cbReq); if (RT_SUCCESS(rc)) rc = pHdr->rc; return rc; }