| 1 | /* $Id: VBoxGuestR3LibMisc.cpp 10626 2008-07-15 07:38:26Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, Misc.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2007 Sun Microsystems, Inc.
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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 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
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| 18 | * Clara, CA 95054 USA or visit http://www.sun.com if you need
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| 19 | * additional information or have any questions.
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| 20 | */
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| 21 |
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| 22 |
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| 23 | /*******************************************************************************
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| 24 | * Header Files *
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| 25 | *******************************************************************************/
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| 26 | #include <iprt/mem.h>
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| 27 | #include <VBox/log.h>
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| 28 |
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| 29 | #include "VBGLR3Internal.h"
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| 30 |
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| 31 | /**
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| 32 | * Cause any pending WaitEvent calls (VBOXGUEST_IOCTL_WAITEVENT) to return
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| 33 | * with a VERR_INTERRUPTED status.
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| 34 | *
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| 35 | * Can be used in combination with a termination flag variable for interrupting
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| 36 | * event loops. Avoiding race conditions is the responsibility of the caller.
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| 37 | *
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| 38 | * @returns IPRT status code
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| 39 | */
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| 40 | VBGLR3DECL(int) VbglR3InterruptEventWaits(void)
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| 41 | {
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| 42 | return vbglR3DoIOCtl(VBOXGUEST_IOCTL_CANCEL_ALL_WAITEVENTS, 0, 0);
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| 43 | }
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| 44 |
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| 45 |
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| 46 | /**
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| 47 | * Write to the backdoor logger from ring 3 guest code.
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| 48 | *
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| 49 | * @returns IPRT status code
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| 50 | *
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| 51 | * @remarks This currently does not accept more than 255 bytes of data at
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| 52 | * one time. It should probably be rewritten to use pass a pointer
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| 53 | * in the IOCtl.
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| 54 | */
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| 55 | VBGLR3DECL(int) VbglR3WriteLog(const char *pch, size_t cb)
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| 56 | {
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| 57 | #if defined(RT_OS_WINDOWS) /** @todo more OSes could take this route (solaris and freebsd for instance). */
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| 58 | /*
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| 59 | * Handle the entire request in one go.
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| 60 | */
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| 61 | if (!pch || !cb)
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| 62 | return VINF_SUCCESS;
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| 63 |
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| 64 | void *pvTmp = RTMemDup(pch, cb);
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| 65 | if (!pvTmp)
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| 66 | return VERR_NO_MEMORY;
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| 67 | int rc = vbglR3DoIOCtl(VBOXGUEST_IOCTL_LOG(cb), pvTmp, cb);
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| 68 | RTMemFree(pvTmp);
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| 69 | return rc;
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| 70 |
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| 71 | #else
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| 72 | /*
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| 73 | * *BSD does not accept more than 4KB per ioctl request, while
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| 74 | * Linux can't express sizes above 8KB, so, split it up into 2KB chunks.
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| 75 | */
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| 76 | # define STEP 2048
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| 77 | int rc = VINF_SUCCESS;
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| 78 | for (size_t off = 0; off < cb && RT_SUCCESS(rc); off += STEP)
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| 79 | {
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| 80 | size_t cbStep = RT_MIN(cb - off, STEP);
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| 81 | rc = vbglR3DoIOCtl(VBOXGUEST_IOCTL_LOG(cbStep), (char *)pch + off, cbStep);
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| 82 | }
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| 83 | # undef STEP
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| 84 | return rc;
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| 85 | #endif
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| 86 | }
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| 87 |
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| 88 |
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| 89 | /**
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| 90 | * Change the IRQ filter mask.
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| 91 | *
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| 92 | * @returns IPRT status code
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| 93 | * @param fOr The OR mask.
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| 94 | * @param fNo The NOT mask.
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| 95 | */
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| 96 | VBGLR3DECL(int) VbglR3CtlFilterMask(uint32_t fOr, uint32_t fNot)
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| 97 | {
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| 98 | #if defined(RT_OS_WINDOWS)
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| 99 | /** @todo Not yet implemented. */
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| 100 | return VERR_NOT_SUPPORTED;
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| 101 |
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| 102 | #else
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| 103 |
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| 104 | VBoxGuestFilterMaskInfo Info;
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| 105 | Info.u32OrMask = fOr;
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| 106 | Info.u32NotMask = fNot;
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| 107 | return vbglR3DoIOCtl(VBOXGUEST_IOCTL_CTL_FILTER_MASK, &Info, sizeof(Info));
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| 108 | #endif
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| 109 | }
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| 110 |
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| 111 |
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| 112 | /**
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| 113 | * Report a change in the capabilities that we support to the host.
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| 114 | *
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| 115 | * @returns IPRT status value
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| 116 | * @param fOr Capabilities which have been added.
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| 117 | * @param fNot Capabilities which have been removed.
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| 118 | *
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| 119 | * @todo Move to a different file.
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| 120 | */
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| 121 | VBGLR3DECL(int) VbglR3SetGuestCaps(uint32_t fOr, uint32_t fNot)
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| 122 | {
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| 123 | VMMDevReqGuestCapabilities2 vmmreqGuestCaps;
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| 124 | int rc;
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| 125 |
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| 126 | vmmdevInitRequest(&vmmreqGuestCaps.header, VMMDevReq_SetGuestCapabilities);
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| 127 | vmmreqGuestCaps.u32OrMask = fOr;
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| 128 | vmmreqGuestCaps.u32NotMask = fNot;
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| 129 | rc = vbglR3GRPerform(&vmmreqGuestCaps.header);
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| 130 | #ifdef DEBUG
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| 131 | if (RT_SUCCESS(rc))
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| 132 | LogRel(("Successfully changed guest capabilities: or mask 0x%x, not mask 0x%x.\n",
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| 133 | fOr, fNot));
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| 134 | else
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| 135 | LogRel(("Failed to change guest capabilities: or mask 0x%x, not mask 0x%x. rc = %Rrc.\n",
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| 136 | fOr, fNot, rc));
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| 137 | #endif
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| 138 | return rc;
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| 139 | }
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| 140 |
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