1 | /* $Id: VBoxGuestR3Lib.cpp 48938 2013-10-07 21:23:57Z vboxsync $ */
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2 | /** @file
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3 | * VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, Core.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2007-2013 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | *
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17 | * The contents of this file may alternatively be used under the terms
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18 | * of the Common Development and Distribution License Version 1.0
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19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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20 | * VirtualBox OSE distribution, in which case the provisions of the
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21 | * CDDL are applicable instead of those of the GPL.
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22 | *
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23 | * You may elect to license modified versions of this file under the
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24 | * terms and conditions of either the GPL or the CDDL or both.
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25 | */
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26 |
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27 |
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28 | /*******************************************************************************
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29 | * Header Files *
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30 | *******************************************************************************/
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31 | #if defined(RT_OS_WINDOWS)
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32 | # include <Windows.h>
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33 |
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34 | #elif defined(RT_OS_OS2)
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35 | # define INCL_BASE
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36 | # define INCL_ERRORS
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37 | # include <os2.h>
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38 |
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39 | #elif defined(RT_OS_DARWIN) \
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40 | || defined(RT_OS_FREEBSD) \
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41 | || defined(RT_OS_HAIKU) \
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42 | || defined(RT_OS_LINUX) \
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43 | || defined(RT_OS_SOLARIS)
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44 | # include <sys/types.h>
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45 | # include <sys/stat.h>
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46 | # if defined(RT_OS_DARWIN) || defined(RT_OS_LINUX) /** @todo check this on solaris+freebsd as well. */
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47 | # include <sys/ioctl.h>
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48 | # endif
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49 | # if defined(RT_OS_DARWIN)
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50 | # include <mach/mach_port.h>
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51 | # include <IOKit/IOKitLib.h>
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52 | # endif
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53 | # include <errno.h>
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54 | # include <unistd.h>
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55 | #endif
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56 |
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57 | #include <iprt/assert.h>
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58 | #include <iprt/asm.h>
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59 | #include <iprt/file.h>
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60 | #include <iprt/time.h>
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61 | #include <iprt/string.h>
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62 | #include <iprt/thread.h>
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63 | #include <VBox/log.h>
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64 | #include "VBGLR3Internal.h"
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65 |
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66 | #ifdef VBOX_VBGLR3_XFREE86
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67 | /* Rather than try to resolve all the header file conflicts, I will just
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68 | prototype what we need here. */
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69 | # define XF86_O_RDWR 0x0002
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70 | typedef void *pointer;
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71 | extern "C" int xf86open(const char *, int, ...);
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72 | extern "C" int xf86close(int);
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73 | extern "C" int xf86ioctl(int, unsigned long, pointer);
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74 | #endif
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75 |
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76 |
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77 | /*******************************************************************************
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78 | * Global Variables *
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79 | *******************************************************************************/
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80 | /** The VBoxGuest device handle. */
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81 | #ifdef VBOX_VBGLR3_XFREE86
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82 | static int g_File = -1;
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83 | #elif defined(RT_OS_WINDOWS)
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84 | static HANDLE g_hFile = INVALID_HANDLE_VALUE;
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85 | #else
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86 | static RTFILE g_File = NIL_RTFILE;
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87 | #endif
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88 | /** User counter.
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89 | * A counter of the number of times the library has been initialised, for use with
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90 | * X.org drivers, where the library may be shared by multiple independent modules
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91 | * inside a single process space.
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92 | */
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93 | static uint32_t volatile g_cInits = 0;
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94 | #ifdef RT_OS_DARWIN
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95 | /** I/O Kit connection handle. */
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96 | static io_connect_t g_uConnection = 0;
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97 | #endif
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98 |
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99 |
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100 |
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101 | /**
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102 | * Implementation of VbglR3Init and VbglR3InitUser
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103 | */
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104 | static int vbglR3Init(const char *pszDeviceName)
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105 | {
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106 | uint32_t cInits = ASMAtomicIncU32(&g_cInits);
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107 | Assert(cInits > 0);
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108 | if (cInits > 1)
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109 | {
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110 | /*
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111 | * This will fail if two (or more) threads race each other calling VbglR3Init.
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112 | * However it will work fine for single threaded or otherwise serialized
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113 | * processed calling us more than once.
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114 | */
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115 | #ifdef RT_OS_WINDOWS
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116 | if (g_hFile == INVALID_HANDLE_VALUE)
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117 | #elif !defined (VBOX_VBGLR3_XFREE86)
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118 | if (g_File == NIL_RTFILE)
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119 | #else
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120 | if (g_File == -1)
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121 | #endif
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122 | return VERR_INTERNAL_ERROR;
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123 | return VINF_SUCCESS;
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124 | }
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125 | #if defined(RT_OS_WINDOWS)
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126 | if (g_hFile != INVALID_HANDLE_VALUE)
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127 | #elif !defined(VBOX_VBGLR3_XFREE86)
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128 | if (g_File != NIL_RTFILE)
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129 | #else
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130 | if (g_File != -1)
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131 | #endif
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132 | return VERR_INTERNAL_ERROR;
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133 |
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134 | #if defined(RT_OS_WINDOWS)
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135 | /*
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136 | * Have to use CreateFile here as we want to specify FILE_FLAG_OVERLAPPED
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137 | * and possible some other bits not available thru iprt/file.h.
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138 | */
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139 | HANDLE hFile = CreateFile(pszDeviceName,
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140 | GENERIC_READ | GENERIC_WRITE,
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141 | FILE_SHARE_READ | FILE_SHARE_WRITE,
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142 | NULL,
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143 | OPEN_EXISTING,
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144 | FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED,
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145 | NULL);
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146 |
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147 | if (hFile == INVALID_HANDLE_VALUE)
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148 | return VERR_OPEN_FAILED;
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149 | g_hFile = hFile;
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150 |
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151 | #elif defined(RT_OS_OS2)
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152 | /*
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153 | * We might wish to compile this with Watcom, so stick to
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154 | * the OS/2 APIs all the way. And in any case we have to use
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155 | * DosDevIOCtl for the requests, why not use Dos* for everything.
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156 | */
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157 | HFILE hf = NULLHANDLE;
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158 | ULONG ulAction = 0;
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159 | APIRET rc = DosOpen((PCSZ)pszDeviceName, &hf, &ulAction, 0, FILE_NORMAL,
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160 | OPEN_ACTION_OPEN_IF_EXISTS,
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161 | OPEN_FLAGS_FAIL_ON_ERROR | OPEN_FLAGS_NOINHERIT | OPEN_SHARE_DENYNONE | OPEN_ACCESS_READWRITE,
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162 | NULL);
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163 | if (rc)
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164 | return RTErrConvertFromOS2(rc);
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165 |
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166 | if (hf < 16)
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167 | {
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168 | HFILE ahfs[16];
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169 | unsigned i;
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170 | for (i = 0; i < RT_ELEMENTS(ahfs); i++)
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171 | {
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172 | ahfs[i] = 0xffffffff;
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173 | rc = DosDupHandle(hf, &ahfs[i]);
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174 | if (rc)
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175 | break;
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176 | }
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177 |
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178 | if (i-- > 1)
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179 | {
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180 | ULONG fulState = 0;
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181 | rc = DosQueryFHState(ahfs[i], &fulState);
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182 | if (!rc)
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183 | {
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184 | fulState |= OPEN_FLAGS_NOINHERIT;
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185 | fulState &= OPEN_FLAGS_WRITE_THROUGH | OPEN_FLAGS_FAIL_ON_ERROR | OPEN_FLAGS_NO_CACHE | OPEN_FLAGS_NOINHERIT; /* Turn off non-participating bits. */
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186 | rc = DosSetFHState(ahfs[i], fulState);
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187 | }
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188 | if (!rc)
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189 | {
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190 | rc = DosClose(hf);
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191 | AssertMsg(!rc, ("%ld\n", rc));
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192 | hf = ahfs[i];
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193 | }
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194 | else
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195 | i++;
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196 | while (i-- > 0)
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197 | DosClose(ahfs[i]);
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198 | }
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199 | }
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200 | g_File = (RTFILE)hf;
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201 |
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202 | #elif defined(RT_OS_DARWIN)
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203 | /*
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204 | * Darwin is kind of special we need to engage the device via I/O first
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205 | * before we open it via the BSD device node.
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206 | */
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207 | mach_port_t MasterPort;
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208 | kern_return_t kr = IOMasterPort(MACH_PORT_NULL, &MasterPort);
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209 | if (kr != kIOReturnSuccess)
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210 | return VERR_GENERAL_FAILURE;
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211 |
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212 | CFDictionaryRef ClassToMatch = IOServiceMatching("org_virtualbox_VBoxGuest");
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213 | if (!ClassToMatch)
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214 | return VERR_GENERAL_FAILURE;
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215 |
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216 | io_service_t ServiceObject = IOServiceGetMatchingService(kIOMasterPortDefault, ClassToMatch);
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217 | if (!ServiceObject)
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218 | return VERR_NOT_FOUND;
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219 |
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220 | io_connect_t uConnection;
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221 | kr = IOServiceOpen(ServiceObject, mach_task_self(), 0, &uConnection);
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222 | IOObjectRelease(ServiceObject);
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223 | if (kr != kIOReturnSuccess)
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224 | return VERR_OPEN_FAILED;
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225 |
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226 | RTFILE hFile;
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227 | int rc = RTFileOpen(&hFile, pszDeviceName, RTFILE_O_READWRITE | RTFILE_O_OPEN | RTFILE_O_DENY_NONE);
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228 | if (RT_FAILURE(rc))
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229 | {
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230 | IOServiceClose(uConnection);
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231 | return rc;
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232 | }
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233 | g_File = hFile;
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234 | g_uConnection = uConnection;
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235 |
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236 | #elif defined(VBOX_VBGLR3_XFREE86)
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237 | int File = xf86open(pszDeviceName, XF86_O_RDWR);
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238 | if (File == -1)
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239 | return VERR_OPEN_FAILED;
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240 | g_File = File;
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241 |
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242 | #else
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243 |
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244 | /* The default implementation. (linux, solaris, freebsd, haiku) */
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245 | RTFILE File;
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246 | int rc = RTFileOpen(&File, pszDeviceName, RTFILE_O_READWRITE | RTFILE_O_OPEN | RTFILE_O_DENY_NONE);
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247 | if (RT_FAILURE(rc))
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248 | return rc;
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249 | g_File = File;
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250 |
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251 | #endif
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252 |
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253 | #ifndef VBOX_VBGLR3_XFREE86
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254 | /*
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255 | * Create release logger
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256 | */
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257 | PRTLOGGER pReleaseLogger;
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258 | static const char * const s_apszGroups[] = VBOX_LOGGROUP_NAMES;
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259 | int rc2 = RTLogCreate(&pReleaseLogger, 0, "all", "VBOX_RELEASE_LOG",
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260 | RT_ELEMENTS(s_apszGroups), &s_apszGroups[0], RTLOGDEST_USER, NULL);
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261 | /* This may legitimately fail if we are using the mini-runtime. */
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262 | if (RT_SUCCESS(rc2))
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263 | RTLogRelSetDefaultInstance(pReleaseLogger);
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264 | #endif
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265 |
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266 | return VINF_SUCCESS;
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267 | }
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268 |
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269 |
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270 | /**
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271 | * Open the VBox R3 Guest Library. This should be called by system daemons
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272 | * and processes.
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273 | */
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274 | VBGLR3DECL(int) VbglR3Init(void)
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275 | {
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276 | return vbglR3Init(VBOXGUEST_DEVICE_NAME);
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277 | }
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278 |
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279 |
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280 | /**
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281 | * Open the VBox R3 Guest Library. Equivalent to VbglR3Init, but for user
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282 | * session processes.
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283 | */
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284 | VBGLR3DECL(int) VbglR3InitUser(void)
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285 | {
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286 | return vbglR3Init(VBOXGUEST_USER_DEVICE_NAME);
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287 | }
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288 |
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289 |
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290 | VBGLR3DECL(void) VbglR3Term(void)
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291 | {
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292 | /*
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293 | * Decrement the reference count and see if we're the last one out.
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294 | */
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295 | uint32_t cInits = ASMAtomicDecU32(&g_cInits);
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296 | if (cInits > 0)
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297 | return;
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298 | #if !defined(VBOX_VBGLR3_XFREE86)
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299 | AssertReturnVoid(!cInits);
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300 |
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301 | # if defined(RT_OS_WINDOWS)
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302 | HANDLE hFile = g_hFile;
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303 | g_hFile = INVALID_HANDLE_VALUE;
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304 | AssertReturnVoid(hFile != INVALID_HANDLE_VALUE);
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305 | BOOL fRc = CloseHandle(hFile);
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306 | Assert(fRc); NOREF(fRc);
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307 |
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308 | # elif defined(RT_OS_OS2)
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309 | RTFILE File = g_File;
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310 | g_File = NIL_RTFILE;
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311 | AssertReturnVoid(File != NIL_RTFILE);
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312 | APIRET rc = DosClose((uintptr_t)File);
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313 | AssertMsg(!rc, ("%ld\n", rc));
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314 |
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315 | #elif defined(RT_OS_DARWIN)
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316 | io_connect_t uConnection = g_uConnection;
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317 | RTFILE hFile = g_File;
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318 | g_uConnection = 0;
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319 | g_File = NIL_RTFILE;
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320 | kern_return_t kr = IOServiceClose(uConnection);
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321 | AssertMsg(kr == kIOReturnSuccess, ("%#x (%d)\n", kr, kr));
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322 | int rc = RTFileClose(hFile);
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323 | AssertRC(rc);
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324 |
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325 | # else /* The IPRT case. */
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326 | RTFILE File = g_File;
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327 | g_File = NIL_RTFILE;
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328 | AssertReturnVoid(File != NIL_RTFILE);
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329 | int rc = RTFileClose(File);
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330 | AssertRC(rc);
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331 | # endif
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332 |
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333 | #else /* VBOX_VBGLR3_XFREE86 */
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334 | int File = g_File;
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335 | g_File = -1;
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336 | if (File == -1)
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337 | return;
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338 | xf86close(File);
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339 | #endif /* VBOX_VBGLR3_XFREE86 */
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340 | }
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341 |
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342 |
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343 | /**
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344 | * Internal wrapper around various OS specific ioctl implementations.
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345 | *
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346 | * @returns VBox status code as returned by VBoxGuestCommonIOCtl, or
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347 | * an failure returned by the OS specific ioctl APIs.
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348 | *
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349 | * @param iFunction The requested function.
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350 | * @param pvData The input and output data buffer.
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351 | * @param cbData The size of the buffer.
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352 | *
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353 | * @remark Exactly how the VBoxGuestCommonIOCtl is ferried back
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354 | * here is OS specific. On BSD and Darwin we can use errno,
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355 | * while on OS/2 we use the 2nd buffer of the IOCtl.
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356 | */
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357 | int vbglR3DoIOCtl(unsigned iFunction, void *pvData, size_t cbData)
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358 | {
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359 | #if defined(RT_OS_WINDOWS)
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360 | DWORD cbReturned = 0;
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361 | if (!DeviceIoControl(g_hFile, iFunction, pvData, (DWORD)cbData, pvData, (DWORD)cbData, &cbReturned, NULL))
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362 | {
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363 | /** @todo The passing of error codes needs to be tested and fixed (as does *all* the other hosts except for
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364 | * OS/2). The idea is that the VBox status codes in ring-0 should be transferred without loss down to
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365 | * ring-3. However, it's not vitally important right now (obviously, since the other guys has been
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366 | * ignoring it for 1+ years now). On Linux and Solaris the transfer is done, but it is currently not
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367 | * lossless, so still needs fixing. */
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368 | DWORD LastErr = GetLastError();
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369 | return RTErrConvertFromWin32(LastErr);
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370 | }
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371 |
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372 | return VINF_SUCCESS;
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373 |
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374 | #elif defined(RT_OS_OS2)
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375 | ULONG cbOS2Parm = cbData;
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376 | int32_t vrc = VERR_INTERNAL_ERROR;
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377 | ULONG cbOS2Data = sizeof(vrc);
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378 | APIRET rc = DosDevIOCtl((uintptr_t)g_File, VBOXGUEST_IOCTL_CATEGORY, iFunction,
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379 | pvData, cbData, &cbOS2Parm,
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380 | &vrc, sizeof(vrc), &cbOS2Data);
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381 | if (RT_LIKELY(!rc))
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382 | return vrc;
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383 | return RTErrConvertFromOS2(rc);
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384 |
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385 | #elif defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
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386 | VBGLBIGREQ Hdr;
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387 | Hdr.u32Magic = VBGLBIGREQ_MAGIC;
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388 | Hdr.cbData = cbData;
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389 | Hdr.pvDataR3 = pvData;
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390 | # if HC_ARCH_BITS == 32
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391 | Hdr.u32Padding = 0;
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392 | # endif
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393 |
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394 | /** @todo test status code passing! Check that the kernel doesn't do any
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395 | * error checks using specific errno values, and just pass an VBox
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396 | * error instead of an errno.h one. Alternatively, extend/redefine the
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397 | * header with an error code return field (much better alternative
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398 | * actually). */
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399 | #ifdef VBOX_VBGLR3_XFREE86
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400 | int rc = xf86ioctl(g_File, iFunction, &Hdr);
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401 | #else
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402 | if (g_File == NIL_RTFILE)
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403 | return VERR_INVALID_HANDLE;
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404 | int rc = ioctl(RTFileToNative(g_File), iFunction, &Hdr);
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405 | #endif
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406 | if (rc == -1)
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407 | {
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408 | rc = errno;
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409 | return RTErrConvertFromErrno(rc);
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410 | }
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411 | return VINF_SUCCESS;
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412 |
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413 | #elif defined(RT_OS_DARWIN) || defined(RT_OS_LINUX)
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414 | # ifdef VBOX_VBGLR3_XFREE86
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415 | int rc = xf86ioctl((int)g_File, iFunction, pvData);
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416 | # else
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417 | if (g_File == NIL_RTFILE)
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418 | return VERR_INVALID_HANDLE;
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419 | int rc = ioctl(RTFileToNative(g_File), iFunction, pvData);
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420 | # endif
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421 | if (RT_LIKELY(rc == 0))
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422 | return VINF_SUCCESS;
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423 |
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424 | /* Positive values are negated VBox error status codes. */
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425 | if (rc > 0)
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426 | rc = -rc;
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427 | else
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428 | # ifdef VBOX_VBGLR3_XFREE86
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429 | rc = VERR_FILE_IO_ERROR;
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430 | # else
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431 | rc = RTErrConvertFromErrno(errno);
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432 | # endif
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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 |
|
---|