| 1 | /* $Id: SUPLib-darwin.cpp 100097 2023-06-07 17:45:33Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VirtualBox Support Library - Darwin specific parts.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.alldomusa.eu.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #define LOG_GROUP LOG_GROUP_SUP
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| 42 | #ifdef IN_SUP_HARDENED_R3
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| 43 | # undef DEBUG /* Warning: disables RT_STRICT */
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| 44 | # ifndef LOG_DISABLED
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| 45 | # define LOG_DISABLED
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| 46 | # endif
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| 47 | # define RTLOG_REL_DISABLED
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| 48 | # include <iprt/log.h>
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| 49 | #endif
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| 50 |
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| 51 | #include <VBox/types.h>
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| 52 | #include <VBox/sup.h>
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| 53 | #include <VBox/param.h>
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| 54 | #include <VBox/err.h>
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| 55 | #include <VBox/log.h>
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| 56 | #include <iprt/path.h>
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| 57 | #include <iprt/assert.h>
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| 58 | #include <iprt/err.h>
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| 59 | #include <iprt/string.h>
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| 60 | #include "../SUPLibInternal.h"
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| 61 | #include "../SUPDrvIOC.h"
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| 62 |
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| 63 | #include <sys/fcntl.h>
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| 64 | #include <sys/ioctl.h>
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| 65 | #include <sys/types.h>
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| 66 | #include <sys/sysctl.h>
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| 67 | #include <errno.h>
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| 68 | #include <unistd.h>
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| 69 | #include <stdlib.h>
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| 70 | #include <mach/mach_port.h>
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| 71 | #include <IOKit/IOKitLib.h>
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| 72 |
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| 73 |
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| 74 | /*********************************************************************************************************************************
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| 75 | * Defined Constants And Macros *
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| 76 | *********************************************************************************************************************************/
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| 77 | /** System device name. */
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| 78 | #define DEVICE_NAME_SYS "/dev/vboxdrv"
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| 79 | /** User device name. */
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| 80 | #define DEVICE_NAME_USR "/dev/vboxdrvu"
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| 81 | /** The IOClass key of the service (see SUPDrv-darwin.cpp / Info.plist). */
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| 82 | #define IOCLASS_NAME "org_virtualbox_SupDrv"
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| 83 |
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| 84 |
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| 85 |
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| 86 | /**
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| 87 | * Opens the BSD device node.
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| 88 | *
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| 89 | * @returns VBox status code.
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| 90 | */
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| 91 | static int suplibDarwinOpenDevice(PSUPLIBDATA pThis, bool fUnrestricted)
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| 92 | {
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| 93 | /*
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| 94 | * Open the BSD device.
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| 95 | * This will connect to the session created when the SupDrvClient was
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| 96 | * started, so it has to be done after opening the service (IOC v9.1+).
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| 97 | */
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| 98 | int hDevice = open(fUnrestricted ? DEVICE_NAME_SYS : DEVICE_NAME_USR, O_RDWR, 0);
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| 99 | if (hDevice < 0)
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| 100 | {
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| 101 | int rc;
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| 102 | switch (errno)
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| 103 | {
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| 104 | case ENODEV: rc = VERR_VM_DRIVER_LOAD_ERROR; break;
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| 105 | case EPERM:
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| 106 | case EACCES: rc = VERR_VM_DRIVER_NOT_ACCESSIBLE; break;
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| 107 | case ENOENT: rc = VERR_VM_DRIVER_NOT_INSTALLED; break;
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| 108 | default: rc = VERR_VM_DRIVER_OPEN_ERROR; break;
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| 109 | }
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| 110 | LogRel(("SUP: Failed to open \"%s\", errno=%d, rc=%Rrc\n", fUnrestricted ? DEVICE_NAME_SYS : DEVICE_NAME_USR, errno, rc));
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| 111 | return rc;
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| 112 | }
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| 113 |
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| 114 | /*
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| 115 | * Mark the file handle close on exec.
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| 116 | */
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| 117 | if (fcntl(hDevice, F_SETFD, FD_CLOEXEC) != 0)
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| 118 | {
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| 119 | #ifdef IN_SUP_HARDENED_R3
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| 120 | int rc = VERR_INTERNAL_ERROR;
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| 121 | #else
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| 122 | int err = errno;
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| 123 | int rc = RTErrConvertFromErrno(err);
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| 124 | LogRel(("suplibOSInit: setting FD_CLOEXEC failed, errno=%d (%Rrc)\n", err, rc));
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| 125 | #endif
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| 126 | close(hDevice);
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| 127 | return rc;
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| 128 | }
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| 129 |
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| 130 | pThis->hDevice = hDevice;
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| 131 | pThis->fUnrestricted = fUnrestricted;
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| 132 | return VINF_SUCCESS;
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| 133 | }
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| 134 |
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| 135 |
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| 136 | /**
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| 137 | * Opens the IOKit service, instantiating org_virtualbox_SupDrvClient.
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| 138 | *
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| 139 | * @returns VBox status code.
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| 140 | */
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| 141 | static int suplibDarwinOpenService(PSUPLIBDATA pThis)
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| 142 | {
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| 143 | /*
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| 144 | * Open the IOKit client first - The first step is finding the service.
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| 145 | */
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| 146 | mach_port_t MasterPort;
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| 147 | kern_return_t kr = IOMasterPort(MACH_PORT_NULL, &MasterPort);
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| 148 | if (kr != kIOReturnSuccess)
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| 149 | {
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| 150 | LogRel(("IOMasterPort -> %d\n", kr));
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| 151 | return VERR_GENERAL_FAILURE;
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| 152 | }
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| 153 |
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| 154 | CFDictionaryRef ClassToMatch = IOServiceMatching(IOCLASS_NAME);
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| 155 | if (!ClassToMatch)
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| 156 | {
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| 157 | LogRel(("IOServiceMatching(\"%s\") failed.\n", IOCLASS_NAME));
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| 158 | return VERR_GENERAL_FAILURE;
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| 159 | }
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| 160 |
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| 161 | /* Create an io_iterator_t for all instances of our drivers class that exist in the IORegistry. */
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| 162 | io_iterator_t Iterator;
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| 163 | kr = IOServiceGetMatchingServices(MasterPort, ClassToMatch, &Iterator);
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| 164 | if (kr != kIOReturnSuccess)
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| 165 | {
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| 166 | LogRel(("IOServiceGetMatchingServices returned %d\n", kr));
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| 167 | return VERR_GENERAL_FAILURE;
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| 168 | }
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| 169 |
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| 170 | /* Get the first item in the iterator and release it. */
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| 171 | io_service_t ServiceObject = IOIteratorNext(Iterator);
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| 172 | IOObjectRelease(Iterator);
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| 173 | if (!ServiceObject)
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| 174 | {
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| 175 | LogRel(("SUP: Couldn't find any matches. The kernel module is probably not loaded.\n"));
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| 176 | return VERR_VM_DRIVER_NOT_INSTALLED;
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| 177 | }
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| 178 |
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| 179 | /*
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| 180 | * Open the service.
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| 181 | *
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| 182 | * This will cause the user client class in SUPDrv-darwin.cpp to be
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| 183 | * instantiated and create a session for this process.
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| 184 | */
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| 185 | io_connect_t Connection = 0;
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| 186 | kr = IOServiceOpen(ServiceObject, mach_task_self(), SUP_DARWIN_IOSERVICE_COOKIE, &Connection);
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| 187 | IOObjectRelease(ServiceObject);
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| 188 | if (kr != kIOReturnSuccess)
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| 189 | {
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| 190 | LogRel(("SUP: IOServiceOpen returned %d. Driver open failed.\n", kr));
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| 191 | pThis->uConnection = 0;
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| 192 | return VERR_VM_DRIVER_OPEN_ERROR;
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| 193 | }
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| 194 |
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| 195 | AssertCompile(sizeof(pThis->uConnection) >= sizeof(Connection));
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| 196 | pThis->uConnection = Connection;
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| 197 | return VINF_SUCCESS;
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| 198 | }
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| 199 |
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| 200 |
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| 201 | DECLHIDDEN(int) suplibOsInit(PSUPLIBDATA pThis, bool fPreInited, uint32_t fFlags, SUPINITOP *penmWhat, PRTERRINFO pErrInfo)
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| 202 | {
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| 203 | RT_NOREF(penmWhat, pErrInfo);
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| 204 |
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| 205 | /*
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| 206 | * Nothing to do if pre-inited.
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| 207 | */
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| 208 | if (fPreInited)
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| 209 | return VINF_SUCCESS;
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| 210 |
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| 211 | /*
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| 212 | * Driverless?
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| 213 | */
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| 214 | if (fFlags & SUPR3INIT_F_DRIVERLESS)
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| 215 | {
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| 216 | pThis->fDriverless = true;
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| 217 | return VINF_SUCCESS;
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| 218 | }
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| 219 |
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| 220 | /*
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| 221 | * Do the job.
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| 222 | */
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| 223 | Assert(pThis->hDevice == (intptr_t)NIL_RTFILE);
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| 224 | int rc = suplibDarwinOpenService(pThis);
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| 225 | if (RT_SUCCESS(rc))
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| 226 | {
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| 227 | rc = suplibDarwinOpenDevice(pThis, RT_BOOL(fFlags & SUPR3INIT_F_UNRESTRICTED));
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| 228 | if (RT_FAILURE(rc))
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| 229 | {
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| 230 | kern_return_t kr = IOServiceClose((io_connect_t)pThis->uConnection);
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| 231 | if (kr != kIOReturnSuccess)
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| 232 | {
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| 233 | LogRel(("Warning: IOServiceClose(%RCv) returned %d\n", pThis->uConnection, kr));
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| 234 | AssertFailed();
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| 235 | }
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| 236 | pThis->uConnection = 0;
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| 237 | }
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| 238 | }
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| 239 | if ( RT_FAILURE(rc)
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| 240 | && fFlags & SUPR3INIT_F_DRIVERLESS_MASK)
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| 241 | {
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| 242 | LogRel(("Failed to open \"%s\", rc=%Rrc - Switching to driverless mode.\n", IOCLASS_NAME, rc));
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| 243 | pThis->fDriverless = true;
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| 244 | rc = VINF_SUCCESS;
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| 245 | }
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| 246 |
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| 247 | return rc;
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| 248 | }
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| 249 |
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| 250 |
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| 251 | DECLHIDDEN(int) suplibOsTerm(PSUPLIBDATA pThis)
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| 252 | {
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| 253 | /*
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| 254 | * Close the connection to the IOService.
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| 255 | * This will cause the SUPDRVSESSION to be closed (starting IOC 9.1).
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| 256 | */
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| 257 | if (pThis->uConnection)
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| 258 | {
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| 259 | kern_return_t kr = IOServiceClose((io_connect_t)pThis->uConnection);
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| 260 | if (kr != kIOReturnSuccess)
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| 261 | {
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| 262 | LogRel(("Warning: IOServiceClose(%RCv) returned %d\n", pThis->uConnection, kr));
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| 263 | AssertFailed();
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| 264 | }
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| 265 | pThis->uConnection = 0;
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| 266 | }
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| 267 |
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| 268 | /*
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| 269 | * Check if we're inited at all.
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| 270 | */
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| 271 | if (pThis->hDevice != (intptr_t)NIL_RTFILE)
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| 272 | {
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| 273 | if (close(pThis->hDevice))
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| 274 | AssertFailed();
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| 275 | pThis->hDevice = (intptr_t)NIL_RTFILE;
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| 276 | }
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| 277 |
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| 278 | return VINF_SUCCESS;
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| 279 | }
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| 280 |
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| 281 |
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| 282 | #ifndef IN_SUP_HARDENED_R3
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| 283 |
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| 284 | DECLHIDDEN(int) suplibOsInstall(void)
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| 285 | {
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| 286 | return VERR_NOT_IMPLEMENTED;
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| 287 | }
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| 288 |
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| 289 |
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| 290 | DECLHIDDEN(int) suplibOsUninstall(void)
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| 291 | {
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| 292 | return VERR_NOT_IMPLEMENTED;
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| 293 | }
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| 294 |
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| 295 |
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| 296 | DECLHIDDEN(int) suplibOsIOCtl(PSUPLIBDATA pThis, uintptr_t uFunction, void *pvReq, size_t cbReq)
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| 297 | {
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| 298 | RT_NOREF(cbReq);
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| 299 | if (RT_LIKELY(ioctl(pThis->hDevice, uFunction, pvReq) >= 0))
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| 300 | return VINF_SUCCESS;
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| 301 | return RTErrConvertFromErrno(errno);
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| 302 | }
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| 303 |
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| 304 |
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| 305 | DECLHIDDEN(int) suplibOsIOCtlFast(PSUPLIBDATA pThis, uintptr_t uFunction, uintptr_t idCpu)
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| 306 | {
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| 307 | int rc = ioctl(pThis->hDevice, uFunction, idCpu);
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| 308 | if (rc == -1)
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| 309 | rc = errno;
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| 310 | return rc;
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| 311 | }
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| 312 |
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| 313 |
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| 314 | DECLHIDDEN(int) suplibOsPageAlloc(PSUPLIBDATA pThis, size_t cPages, uint32_t fFlags, void **ppvPages)
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| 315 | {
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| 316 | RT_NOREF(pThis, fFlags);
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| 317 | *ppvPages = valloc(cPages << PAGE_SHIFT);
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| 318 | if (*ppvPages)
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| 319 | {
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| 320 | memset(*ppvPages, 0, cPages << PAGE_SHIFT);
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| 321 | return VINF_SUCCESS;
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| 322 | }
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| 323 | return RTErrConvertFromErrno(errno);
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| 324 | }
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| 325 |
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| 326 |
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| 327 | DECLHIDDEN(int) suplibOsPageFree(PSUPLIBDATA pThis, void *pvPages, size_t /* cPages */)
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| 328 | {
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| 329 | NOREF(pThis);
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| 330 | free(pvPages);
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| 331 | return VINF_SUCCESS;
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| 332 | }
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| 333 |
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| 334 |
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| 335 | DECLHIDDEN(bool) suplibOsIsNemSupportedWhenNoVtxOrAmdV(void)
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| 336 | {
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| 337 | # if ARCH_BITS == 64
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| 338 | int fHvSupported = 0;
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| 339 | size_t cb = sizeof(fHvSupported);
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| 340 | int rc = sysctlbyname("kern.hv.supported", &fHvSupported, &cb, NULL, 0);
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| 341 | if ( !rc
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| 342 | && cb == sizeof(uint32_t))
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| 343 | return fHvSupported == 1;
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| 344 |
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| 345 | return false;
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| 346 | # else
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| 347 | return false;
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| 348 | #endif
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| 349 | }
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| 350 |
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| 351 | #endif /* !IN_SUP_HARDENED_R3 */
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| 352 |
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