| 1 | /** @file
|
|---|
| 2 | *
|
|---|
| 3 | * VBoxGuestLib - A support library for VirtualBox guest additions:
|
|---|
| 4 | * Host-Guest Communication Manager internal functions, implemented by VBoxGuest
|
|---|
| 5 | */
|
|---|
| 6 |
|
|---|
| 7 | /*
|
|---|
| 8 | * Copyright (C) 2006-2007 innotek GmbH
|
|---|
| 9 | *
|
|---|
| 10 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 11 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 12 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 13 | * General Public License as published by the Free Software Foundation,
|
|---|
| 14 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
|
|---|
| 15 | * distribution. VirtualBox OSE is distributed in the hope that it will
|
|---|
| 16 | * be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 17 | */
|
|---|
| 18 |
|
|---|
| 19 | /* Entire file is ifdef'ed with VBGL_VBOXGUEST */
|
|---|
| 20 | #ifdef VBGL_VBOXGUEST
|
|---|
| 21 |
|
|---|
| 22 | #include <VBox/VBoxGuestLib.h>
|
|---|
| 23 | #include "VBGLInternal.h"
|
|---|
| 24 | #include <iprt/string.h>
|
|---|
| 25 | #include <iprt/assert.h>
|
|---|
| 26 | #include <iprt/alloca.h>
|
|---|
| 27 |
|
|---|
| 28 | /* These functions can be only used by VBoxGuest. */
|
|---|
| 29 |
|
|---|
| 30 | DECLVBGL(int) VbglHGCMConnect (VBoxGuestHGCMConnectInfo *pConnectInfo,
|
|---|
| 31 | VBGLHGCMCALLBACK *pAsyncCallback, void *pvAsyncData,
|
|---|
| 32 | uint32_t u32AsyncData)
|
|---|
| 33 | {
|
|---|
| 34 | VMMDevHGCMConnect *pHGCMConnect;
|
|---|
| 35 | int rc;
|
|---|
| 36 |
|
|---|
| 37 | if (!pConnectInfo || !pAsyncCallback)
|
|---|
| 38 | return VERR_INVALID_PARAMETER;
|
|---|
| 39 |
|
|---|
| 40 | pHGCMConnect = NULL;
|
|---|
| 41 |
|
|---|
| 42 | /* Allocate request */
|
|---|
| 43 | rc = VbglGRAlloc ((VMMDevRequestHeader **)&pHGCMConnect, sizeof (VMMDevHGCMConnect), VMMDevReq_HGCMConnect);
|
|---|
| 44 |
|
|---|
| 45 | if (VBOX_SUCCESS(rc))
|
|---|
| 46 | {
|
|---|
| 47 | /* Initialize request memory */
|
|---|
| 48 | pHGCMConnect->header.fu32Flags = 0;
|
|---|
| 49 |
|
|---|
| 50 | memcpy (&pHGCMConnect->loc, &pConnectInfo->Loc, sizeof (HGCMServiceLocation));
|
|---|
| 51 | pHGCMConnect->u32ClientID = 0;
|
|---|
| 52 |
|
|---|
| 53 | /* Issue request */
|
|---|
| 54 | rc = VbglGRPerform (&pHGCMConnect->header.header);
|
|---|
| 55 |
|
|---|
| 56 | if (VBOX_SUCCESS(rc))
|
|---|
| 57 | {
|
|---|
| 58 | /* Check if host decides to process the request asynchronously. */
|
|---|
| 59 | if (rc == VINF_HGCM_ASYNC_EXECUTE)
|
|---|
| 60 | {
|
|---|
| 61 | /* Wait for request completion interrupt notification from host */
|
|---|
| 62 | pAsyncCallback (&pHGCMConnect->header, pvAsyncData, u32AsyncData);
|
|---|
| 63 | }
|
|---|
| 64 |
|
|---|
| 65 | pConnectInfo->result = pHGCMConnect->header.result;
|
|---|
| 66 |
|
|---|
| 67 | if (VBOX_SUCCESS (pConnectInfo->result))
|
|---|
| 68 | pConnectInfo->u32ClientID = pHGCMConnect->u32ClientID;
|
|---|
| 69 | }
|
|---|
| 70 |
|
|---|
| 71 | VbglGRFree (&pHGCMConnect->header.header);
|
|---|
| 72 | }
|
|---|
| 73 |
|
|---|
| 74 | return rc;
|
|---|
| 75 | }
|
|---|
| 76 |
|
|---|
| 77 |
|
|---|
| 78 | DECLVBGL(int) VbglHGCMDisconnect (VBoxGuestHGCMDisconnectInfo *pDisconnectInfo,
|
|---|
| 79 | VBGLHGCMCALLBACK *pAsyncCallback, void *pvAsyncData, uint32_t u32AsyncData)
|
|---|
| 80 | {
|
|---|
| 81 | VMMDevHGCMDisconnect *pHGCMDisconnect;
|
|---|
| 82 | int rc;
|
|---|
| 83 |
|
|---|
| 84 | if (!pDisconnectInfo || !pAsyncCallback)
|
|---|
| 85 | return VERR_INVALID_PARAMETER;
|
|---|
| 86 |
|
|---|
| 87 | pHGCMDisconnect = NULL;
|
|---|
| 88 |
|
|---|
| 89 | /* Allocate request */
|
|---|
| 90 | rc = VbglGRAlloc ((VMMDevRequestHeader **)&pHGCMDisconnect, sizeof (VMMDevHGCMDisconnect), VMMDevReq_HGCMDisconnect);
|
|---|
| 91 |
|
|---|
| 92 | if (VBOX_SUCCESS(rc))
|
|---|
| 93 | {
|
|---|
| 94 | /* Initialize request memory */
|
|---|
| 95 | pHGCMDisconnect->header.fu32Flags = 0;
|
|---|
| 96 |
|
|---|
| 97 | pHGCMDisconnect->u32ClientID = pDisconnectInfo->u32ClientID;
|
|---|
| 98 |
|
|---|
| 99 | /* Issue request */
|
|---|
| 100 | rc = VbglGRPerform (&pHGCMDisconnect->header.header);
|
|---|
| 101 |
|
|---|
| 102 | if (VBOX_SUCCESS(rc))
|
|---|
| 103 | {
|
|---|
| 104 | /* Check if host decides to process the request asynchronously. */
|
|---|
| 105 | if (rc == VINF_HGCM_ASYNC_EXECUTE)
|
|---|
| 106 | {
|
|---|
| 107 | /* Wait for request completion interrupt notification from host */
|
|---|
| 108 | pAsyncCallback (&pHGCMDisconnect->header, pvAsyncData, u32AsyncData);
|
|---|
| 109 | }
|
|---|
| 110 |
|
|---|
| 111 | pDisconnectInfo->result = pHGCMDisconnect->header.result;
|
|---|
| 112 | }
|
|---|
| 113 |
|
|---|
| 114 | VbglGRFree (&pHGCMDisconnect->header.header);
|
|---|
| 115 | }
|
|---|
| 116 |
|
|---|
| 117 | return rc;
|
|---|
| 118 | }
|
|---|
| 119 |
|
|---|
| 120 |
|
|---|
| 121 | DECLVBGL(int) VbglHGCMCall (VBoxGuestHGCMCallInfo *pCallInfo,
|
|---|
| 122 | VBGLHGCMCALLBACK *pAsyncCallback, void *pvAsyncData, uint32_t u32AsyncData)
|
|---|
| 123 | {
|
|---|
| 124 | VMMDevHGCMCall *pHGCMCall;
|
|---|
| 125 | uint32_t cbParms;
|
|---|
| 126 | HGCMFunctionParameter *pParm;
|
|---|
| 127 | unsigned iParm;
|
|---|
| 128 | int rc;
|
|---|
| 129 |
|
|---|
| 130 | if (!pCallInfo || !pAsyncCallback || pCallInfo->cParms > VBOX_HGCM_MAX_PARMS)
|
|---|
| 131 | {
|
|---|
| 132 | AssertFailed();
|
|---|
| 133 | return VERR_INVALID_PARAMETER;
|
|---|
| 134 | }
|
|---|
| 135 |
|
|---|
| 136 | dprintf (("VbglHGCMCall: pCallInfo->cParms = %d, pHGCMCall->u32Function = %d\n", pCallInfo->cParms, pCallInfo->u32Function));
|
|---|
| 137 |
|
|---|
| 138 | pHGCMCall = NULL;
|
|---|
| 139 |
|
|---|
| 140 | cbParms = pCallInfo->cParms * sizeof (HGCMFunctionParameter);
|
|---|
| 141 |
|
|---|
| 142 | /* Allocate request */
|
|---|
| 143 | rc = VbglGRAlloc ((VMMDevRequestHeader **)&pHGCMCall, sizeof (VMMDevHGCMCall) + cbParms, VMMDevReq_HGCMCall);
|
|---|
| 144 |
|
|---|
| 145 | dprintf (("VbglHGCMCall Allocated gr %p, rc = %Vrc, cbParms = %d\n", pHGCMCall, rc, cbParms));
|
|---|
| 146 |
|
|---|
| 147 | if (VBOX_SUCCESS(rc))
|
|---|
| 148 | {
|
|---|
| 149 | void *apvCtx[VBOX_HGCM_MAX_PARMS];
|
|---|
| 150 | memset (apvCtx, 0, sizeof(void *) * pCallInfo->cParms);
|
|---|
| 151 |
|
|---|
| 152 | /* Initialize request memory */
|
|---|
| 153 | pHGCMCall->header.fu32Flags = 0;
|
|---|
| 154 | pHGCMCall->header.result = VINF_SUCCESS;
|
|---|
| 155 |
|
|---|
| 156 | pHGCMCall->u32ClientID = pCallInfo->u32ClientID;
|
|---|
| 157 | pHGCMCall->u32Function = pCallInfo->u32Function;
|
|---|
| 158 | pHGCMCall->cParms = pCallInfo->cParms;
|
|---|
| 159 |
|
|---|
| 160 | if (cbParms)
|
|---|
| 161 | {
|
|---|
| 162 | memcpy (VMMDEV_HGCM_CALL_PARMS(pHGCMCall), VBOXGUEST_HGCM_CALL_PARMS(pCallInfo), cbParms);
|
|---|
| 163 |
|
|---|
| 164 | /* Lock user buffers. */
|
|---|
| 165 | pParm = VBOXGUEST_HGCM_CALL_PARMS(pCallInfo);
|
|---|
| 166 |
|
|---|
| 167 | for (iParm = 0; iParm < pCallInfo->cParms; iParm++, pParm++)
|
|---|
| 168 | {
|
|---|
| 169 | if (pParm->type == VMMDevHGCMParmType_LinAddr_Locked_In)
|
|---|
| 170 | pParm->type = VMMDevHGCMParmType_LinAddr_In;
|
|---|
| 171 | else
|
|---|
| 172 | if (pParm->type == VMMDevHGCMParmType_LinAddr_Locked_Out)
|
|---|
| 173 | pParm->type = VMMDevHGCMParmType_LinAddr_Out;
|
|---|
| 174 | else
|
|---|
| 175 | if (pParm->type == VMMDevHGCMParmType_LinAddr_Locked)
|
|---|
| 176 | pParm->type = VMMDevHGCMParmType_LinAddr;
|
|---|
| 177 | else
|
|---|
| 178 | if ( pParm->type == VMMDevHGCMParmType_LinAddr_In
|
|---|
| 179 | || pParm->type == VMMDevHGCMParmType_LinAddr_Out
|
|---|
| 180 | || pParm->type == VMMDevHGCMParmType_LinAddr)
|
|---|
| 181 | {
|
|---|
| 182 | /* PORTME: When porting this to Darwin and other systems where the entire kernel isn't mapped
|
|---|
| 183 | into every process, all linear address will have to be converted to physical SG lists at
|
|---|
| 184 | this point. Care must also be taken on these guests to not mix kernel and user addresses
|
|---|
| 185 | in HGCM calls, or we'll end up locking the wrong memory. If VMMDev/HGCM gets a linear address
|
|---|
| 186 | it will assume that it's in the current memory context (i.e. use CR3 to translate it).
|
|---|
| 187 |
|
|---|
| 188 | These kind of problems actually applies to some patched linux kernels too, including older
|
|---|
| 189 | fedora releases. (The patch is the infamous 4G/4G patch, aka 4g4g, by Ingo Molnar.) */
|
|---|
| 190 | rc = vbglLockLinear (&apvCtx[iParm], (void *)pParm->u.Pointer.u.linearAddr, pParm->u.Pointer.size, (pParm->type == VMMDevHGCMParmType_LinAddr_In) ? false : true /* write access */);
|
|---|
| 191 |
|
|---|
| 192 | if (VBOX_FAILURE (rc))
|
|---|
| 193 | {
|
|---|
| 194 | break;
|
|---|
| 195 | }
|
|---|
| 196 | }
|
|---|
| 197 | }
|
|---|
| 198 | }
|
|---|
| 199 |
|
|---|
| 200 | /* Check that the parameter locking was ok. */
|
|---|
| 201 | if (VBOX_SUCCESS(rc))
|
|---|
| 202 | {
|
|---|
| 203 | dprintf (("calling VbglGRPerform\n"));
|
|---|
| 204 |
|
|---|
| 205 | /* Issue request */
|
|---|
| 206 | rc = VbglGRPerform (&pHGCMCall->header.header);
|
|---|
| 207 |
|
|---|
| 208 | dprintf (("VbglGRPerform rc = %Vrc (header rc=%d)\n", rc, pHGCMCall->header.result));
|
|---|
| 209 |
|
|---|
| 210 | /** If the call failed, but as a result of the request itself, then pretend success
|
|---|
| 211 | * Upper layers will interpret the result code in the packet.
|
|---|
| 212 | */
|
|---|
| 213 | if (VBOX_FAILURE(rc) && rc == pHGCMCall->header.result)
|
|---|
| 214 | {
|
|---|
| 215 | Assert(pHGCMCall->header.fu32Flags & VBOX_HGCM_REQ_DONE);
|
|---|
| 216 | rc = VINF_SUCCESS;
|
|---|
| 217 | }
|
|---|
| 218 |
|
|---|
| 219 | if (VBOX_SUCCESS(rc))
|
|---|
| 220 | {
|
|---|
| 221 | /* Check if host decides to process the request asynchronously. */
|
|---|
| 222 | if (rc == VINF_HGCM_ASYNC_EXECUTE)
|
|---|
| 223 | {
|
|---|
| 224 | /* Wait for request completion interrupt notification from host */
|
|---|
| 225 | pAsyncCallback (&pHGCMCall->header, pvAsyncData, u32AsyncData);
|
|---|
| 226 | }
|
|---|
| 227 |
|
|---|
| 228 | if (pHGCMCall->header.fu32Flags & VBOX_HGCM_REQ_DONE)
|
|---|
| 229 | {
|
|---|
| 230 | if (cbParms)
|
|---|
| 231 | {
|
|---|
| 232 | memcpy (VBOXGUEST_HGCM_CALL_PARMS(pCallInfo), VMMDEV_HGCM_CALL_PARMS(pHGCMCall), cbParms);
|
|---|
| 233 | }
|
|---|
| 234 | pCallInfo->result = pHGCMCall->header.result;
|
|---|
| 235 | }
|
|---|
| 236 | else
|
|---|
| 237 | {
|
|---|
| 238 | /* The callback returns without completing the request,
|
|---|
| 239 | * that means the wait was interrrupted. That can happen
|
|---|
| 240 | * if system reboots or the VBoxService ended abnormally.
|
|---|
| 241 | * In both cases it is OK to just leave the allocated memory
|
|---|
| 242 | * in the physical heap. The memory leak does not affect normal
|
|---|
| 243 | * operations.
|
|---|
| 244 | * @todo VbglGRCancel (&pHGCMCall->header.header) need to be implemented.
|
|---|
| 245 | * The host will not write to the cancelled memory.
|
|---|
| 246 | */
|
|---|
| 247 | pHGCMCall->header.fu32Flags |= VBOX_HGCM_REQ_CANCELLED;
|
|---|
| 248 | }
|
|---|
| 249 | }
|
|---|
| 250 | }
|
|---|
| 251 |
|
|---|
| 252 | /* Unlock user buffers. */
|
|---|
| 253 | pParm = VBOXGUEST_HGCM_CALL_PARMS(pCallInfo);
|
|---|
| 254 |
|
|---|
| 255 | for (iParm = 0; iParm < pCallInfo->cParms; iParm++, pParm++)
|
|---|
| 256 | {
|
|---|
| 257 | if ( pParm->type == VMMDevHGCMParmType_LinAddr_In
|
|---|
| 258 | || pParm->type == VMMDevHGCMParmType_LinAddr_Out
|
|---|
| 259 | || pParm->type == VMMDevHGCMParmType_LinAddr)
|
|---|
| 260 | {
|
|---|
| 261 | if (apvCtx[iParm] != NULL)
|
|---|
| 262 | {
|
|---|
| 263 | vbglUnlockLinear (apvCtx[iParm], (void *)pParm->u.Pointer.u.linearAddr, pParm->u.Pointer.size);
|
|---|
| 264 | }
|
|---|
| 265 | }
|
|---|
| 266 | else
|
|---|
| 267 | Assert(!apvCtx[iParm]);
|
|---|
| 268 | }
|
|---|
| 269 |
|
|---|
| 270 | if ((pHGCMCall->header.fu32Flags & VBOX_HGCM_REQ_CANCELLED) == 0)
|
|---|
| 271 | VbglGRFree (&pHGCMCall->header.header);
|
|---|
| 272 | else
|
|---|
| 273 | rc = VERR_INTERRUPTED;
|
|---|
| 274 | }
|
|---|
| 275 |
|
|---|
| 276 | return rc;
|
|---|
| 277 | }
|
|---|
| 278 |
|
|---|
| 279 | #endif /* VBGL_VBOXGUEST */
|
|---|
