DrvVDE.cpp@ 86327

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1	/* $Id: DrvVDE.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
2	/** @file
3	* VDE network transport driver.
4	*/
5
6	/*
7	* Contributed by Renzo Davoli. VirtualSquare. University of Bologna, 2010
8	*
9	* Copyright (C) 2006-2020 Oracle Corporation
10	*
11	* This file is part of VirtualBox Open Source Edition (OSE), as
12	* available from http://www.virtualbox.org. This file is free software;
13	* you can redistribute it and/or modify it under the terms of the GNU
14	* General Public License (GPL) as published by the Free Software
15	* Foundation, in version 2 as it comes in the "COPYING" file of the
16	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
17	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
18	*/
19
20
21	/*********************************************************************************************************************************
22	* Header Files *
23	*********************************************************************************************************************************/
24	#define LOG_GROUP LOG_GROUP_DRV_TUN
25	#include <VBox/log.h>
26	#include <VBox/vmm/pdmdrv.h>
27	#include <VBox/vmm/pdmnetifs.h>
28	#include <VBox/vmm/pdmnetinline.h>
29	#include <VBox/VDEPlug.h>
30
31	#include <iprt/asm.h>
32	#include <iprt/assert.h>
33	#include <iprt/ctype.h>
34	#include <iprt/file.h>
35	#include <iprt/mem.h>
36	#include <iprt/param.h>
37	#include <iprt/path.h>
38	#include <iprt/pipe.h>
39	#include <iprt/semaphore.h>
40	#include <iprt/string.h>
41	#include <iprt/thread.h>
42	#include <iprt/uuid.h>
43
44	#include <sys/ioctl.h>
45	#include <sys/poll.h>
46	#include <sys/fcntl.h>
47	#include <errno.h>
48	#include <unistd.h>
49
50	#include "VBoxDD.h"
51
52
53	/*********************************************************************************************************************************
54	* Structures and Typedefs *
55	*********************************************************************************************************************************/
56	/**
57	* VDE driver instance data.
58	*
59	* @implements PDMINETWORKUP
60	*/
61	typedef struct DRVVDE
62	{
63	/** The network interface. */
64	PDMINETWORKUP INetworkUp;
65	/** The network interface. */
66	PPDMINETWORKDOWN pIAboveNet;
67	/** Pointer to the driver instance. */
68	PPDMDRVINS pDrvIns;
69	/** The configured VDE device name. */
70	char *pszDeviceName;
71	/** The write end of the control pipe. */
72	RTPIPE hPipeWrite;
73	/** The read end of the control pipe. */
74	RTPIPE hPipeRead;
75	/** Reader thread. */
76	PPDMTHREAD pThread;
77	/** The connection to the VDE switch */
78	VDECONN *pVdeConn;
79
80	/** @todo The transmit thread. */
81	/** Transmit lock used by drvTAPNetworkUp_BeginXmit. */
82	RTCRITSECT XmitLock;
83
84	#ifdef VBOX_WITH_STATISTICS
85	/** Number of sent packets. */
86	STAMCOUNTER StatPktSent;
87	/** Number of sent bytes. */
88	STAMCOUNTER StatPktSentBytes;
89	/** Number of received packets. */
90	STAMCOUNTER StatPktRecv;
91	/** Number of received bytes. */
92	STAMCOUNTER StatPktRecvBytes;
93	/** Profiling packet transmit runs. */
94	STAMPROFILE StatTransmit;
95	/** Profiling packet receive runs. */
96	STAMPROFILEADV StatReceive;
97	#endif /* VBOX_WITH_STATISTICS */
98
99	#ifdef LOG_ENABLED
100	/** The nano ts of the last transfer. */
101	uint64_t u64LastTransferTS;
102	/** The nano ts of the last receive. */
103	uint64_t u64LastReceiveTS;
104	#endif
105	} DRVVDE, *PDRVVDE;
106
107
108	/** Converts a pointer to VDE::INetworkUp to a PRDVVDE. */
109	#define PDMINETWORKUP_2_DRVVDE(pInterface) ( (PDRVVDE)((uintptr_t)pInterface - RT_UOFFSETOF(DRVVDE, INetworkUp)) )
110
111
112	/*********************************************************************************************************************************
113	* Internal Functions *
114	*********************************************************************************************************************************/
115
116
117
118	/**
119	* @interface_method_impl{PDMINETWORKUP,pfnBeginXmit}
120	*/
121	static DECLCALLBACK(int) drvVDENetworkUp_BeginXmit(PPDMINETWORKUP pInterface, bool fOnWorkerThread)
122	{
123	RT_NOREF(fOnWorkerThread);
124	PDRVVDE pThis = PDMINETWORKUP_2_DRVVDE(pInterface);
125	int rc = RTCritSectTryEnter(&pThis->XmitLock);
126	if (RT_FAILURE(rc))
127	{
128	/** @todo XMIT thread */
129	rc = VERR_TRY_AGAIN;
130	}
131	return rc;
132	}
133
134
135	/**
136	* @interface_method_impl{PDMINETWORKUP,pfnAllocBuf}
137	*/
138	static DECLCALLBACK(int) drvVDENetworkUp_AllocBuf(PPDMINETWORKUP pInterface, size_t cbMin,
139	PCPDMNETWORKGSO pGso, PPPDMSCATTERGATHER ppSgBuf)
140	{
141	RT_NOREF(pInterface);
142	#ifdef VBOX_STRICT
143	PDRVVDE pThis = PDMINETWORKUP_2_DRVVDE(pInterface);
144	Assert(RTCritSectIsOwner(&pThis->XmitLock));
145	#endif
146
147	/*
148	* Allocate a scatter / gather buffer descriptor that is immediately
149	* followed by the buffer space of its single segment. The GSO context
150	* comes after that again.
151	*/
152	PPDMSCATTERGATHER pSgBuf = (PPDMSCATTERGATHER)RTMemAlloc( RT_ALIGN_Z(sizeof(*pSgBuf), 16)
153	+ RT_ALIGN_Z(cbMin, 16)
154	+ (pGso ? RT_ALIGN_Z(sizeof(*pGso), 16) : 0));
155	if (!pSgBuf)
156	return VERR_NO_MEMORY;
157
158	/*
159	* Initialize the S/G buffer and return.
160	*/
161	pSgBuf->fFlags = PDMSCATTERGATHER_FLAGS_MAGIC \| PDMSCATTERGATHER_FLAGS_OWNER_1;
162	pSgBuf->cbUsed = 0;
163	pSgBuf->cbAvailable = RT_ALIGN_Z(cbMin, 16);
164	pSgBuf->pvAllocator = NULL;
165	if (!pGso)
166	pSgBuf->pvUser = NULL;
167	else
168	{
169	pSgBuf->pvUser = (uint8_t *)(pSgBuf + 1) + pSgBuf->cbAvailable;
170	(PPDMNETWORKGSO)pSgBuf->pvUser = pGso;
171	}
172	pSgBuf->cSegs = 1;
173	pSgBuf->aSegs[0].cbSeg = pSgBuf->cbAvailable;
174	pSgBuf->aSegs[0].pvSeg = pSgBuf + 1;
175
176	#if 0 /* poison */
177	memset(pSgBuf->aSegs[0].pvSeg, 'F', pSgBuf->aSegs[0].cbSeg);
178	#endif
179	*ppSgBuf = pSgBuf;
180	return VINF_SUCCESS;
181	}
182
183
184	/**
185	* @interface_method_impl{PDMINETWORKUP,pfnFreeBuf}
186	*/
187	static DECLCALLBACK(int) drvVDENetworkUp_FreeBuf(PPDMINETWORKUP pInterface, PPDMSCATTERGATHER pSgBuf)
188	{
189	RT_NOREF(pInterface);
190	#ifdef VBOX_STRICT
191	PDRVVDE pThis = PDMINETWORKUP_2_DRVVDE(pInterface);
192	Assert(RTCritSectIsOwner(&pThis->XmitLock));
193	#endif
194	if (pSgBuf)
195	{
196	Assert((pSgBuf->fFlags & PDMSCATTERGATHER_FLAGS_MAGIC_MASK) == PDMSCATTERGATHER_FLAGS_MAGIC);
197	pSgBuf->fFlags = 0;
198	RTMemFree(pSgBuf);
199	}
200	return VINF_SUCCESS;
201	}
202
203
204	/**
205	* @interface_method_impl{PDMINETWORKUP,pfnSendBuf}
206	*/
207	static DECLCALLBACK(int) drvVDENetworkUp_SendBuf(PPDMINETWORKUP pInterface, PPDMSCATTERGATHER pSgBuf, bool fOnWorkerThread)
208	{
209	RT_NOREF(fOnWorkerThread);
210	PDRVVDE pThis = PDMINETWORKUP_2_DRVVDE(pInterface);
211	STAM_COUNTER_INC(&pThis->StatPktSent);
212	STAM_COUNTER_ADD(&pThis->StatPktSentBytes, pSgBuf->cbUsed);
213	STAM_PROFILE_START(&pThis->StatTransmit, a);
214
215	AssertPtr(pSgBuf);
216	Assert((pSgBuf->fFlags & PDMSCATTERGATHER_FLAGS_MAGIC_MASK) == PDMSCATTERGATHER_FLAGS_MAGIC);
217	Assert(RTCritSectIsOwner(&pThis->XmitLock));
218
219	int rc;
220	if (!pSgBuf->pvUser)
221	{
222	#ifdef LOG_ENABLED
223	uint64_t u64Now = RTTimeProgramNanoTS();
224	LogFlow(("drvVDESend: %-4d bytes at %llu ns deltas: r=%llu t=%llu\n",
225	pSgBuf->cbUsed, u64Now, u64Now - pThis->u64LastReceiveTS, u64Now - pThis->u64LastTransferTS));
226	pThis->u64LastTransferTS = u64Now;
227	#endif
228	Log2(("drvVDESend: pSgBuf->aSegs[0].pvSeg=%p pSgBuf->cbUsed=%#x\n"
229	"%.*Rhxd\n",
230	pSgBuf->aSegs[0].pvSeg, pSgBuf->cbUsed, pSgBuf->cbUsed, pSgBuf->aSegs[0].pvSeg));
231
232	ssize_t cbSent;
233	cbSent = vde_send(pThis->pVdeConn, pSgBuf->aSegs[0].pvSeg, pSgBuf->cbUsed, 0);
234	rc = cbSent < 0 ? RTErrConvertFromErrno(-cbSent) : VINF_SUCCESS;
235	}
236	else
237	{
238	uint8_t abHdrScratch[256];
239	uint8_t const pbFrame = (uint8_t const )pSgBuf->aSegs[0].pvSeg;
240	PCPDMNETWORKGSO pGso = (PCPDMNETWORKGSO)pSgBuf->pvUser;
241	uint32_t const cSegs = PDMNetGsoCalcSegmentCount(pGso, pSgBuf->cbUsed); Assert(cSegs > 1);
242	rc = 0;
243	for (size_t iSeg = 0; iSeg < cSegs; iSeg++)
244	{
245	uint32_t cbSegFrame;
246	void pvSegFrame = PDMNetGsoCarveSegmentQD(pGso, (uint8_t )pbFrame, pSgBuf->cbUsed, abHdrScratch,
247	iSeg, cSegs, &cbSegFrame);
248	ssize_t cbSent;
249	cbSent = vde_send(pThis->pVdeConn, pvSegFrame, cbSegFrame, 0);
250	rc = cbSent < 0 ? RTErrConvertFromErrno(-cbSent) : VINF_SUCCESS;
251	if (RT_FAILURE(rc))
252	break;
253	}
254	}
255
256	pSgBuf->fFlags = 0;
257	RTMemFree(pSgBuf);
258
259	STAM_PROFILE_STOP(&pThis->StatTransmit, a);
260	AssertRC(rc);
261	if (RT_FAILURE(rc))
262	rc = rc == VERR_NO_MEMORY ? VERR_NET_NO_BUFFER_SPACE : VERR_NET_DOWN;
263	return rc;
264	}
265
266
267	/**
268	* @interface_method_impl{PDMINETWORKUP,pfnEndXmit}
269	*/
270	static DECLCALLBACK(void) drvVDENetworkUp_EndXmit(PPDMINETWORKUP pInterface)
271	{
272	PDRVVDE pThis = PDMINETWORKUP_2_DRVVDE(pInterface);
273	RTCritSectLeave(&pThis->XmitLock);
274	}
275
276
277	/**
278	* @interface_method_impl{PDMINETWORKUP,pfnSetPromiscuousMode}
279	*/
280	static DECLCALLBACK(void) drvVDENetworkUp_SetPromiscuousMode(PPDMINETWORKUP pInterface, bool fPromiscuous)
281	{
282	RT_NOREF(pInterface, fPromiscuous);
283	LogFlow(("drvVDESetPromiscuousMode: fPromiscuous=%d\n", fPromiscuous));
284	/* nothing to do */
285	}
286
287
288	/**
289	* Notification on link status changes.
290	*
291	* @param pInterface Pointer to the interface structure containing the called function pointer.
292	* @param enmLinkState The new link state.
293	* @thread EMT
294	*/
295	static DECLCALLBACK(void) drvVDENetworkUp_NotifyLinkChanged(PPDMINETWORKUP pInterface, PDMNETWORKLINKSTATE enmLinkState)
296	{
297	RT_NOREF(pInterface, enmLinkState);
298	LogFlow(("drvNATNetworkUp_NotifyLinkChanged: enmLinkState=%d\n", enmLinkState));
299	/** @todo take action on link down and up. Stop the polling and such like. */
300	}
301
302
303	/**
304	* Asynchronous I/O thread for handling receive.
305	*
306	* @returns VINF_SUCCESS (ignored).
307	* @param Thread Thread handle.
308	* @param pvUser Pointer to a DRVVDE structure.
309	*/
310	static DECLCALLBACK(int) drvVDEAsyncIoThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
311	{
312	PDRVVDE pThis = PDMINS_2_DATA(pDrvIns, PDRVVDE);
313	LogFlow(("drvVDEAsyncIoThread: pThis=%p\n", pThis));
314
315	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
316	return VINF_SUCCESS;
317
318	STAM_PROFILE_ADV_START(&pThis->StatReceive, a);
319
320	/*
321	* Polling loop.
322	*/
323	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
324	{
325	/*
326	* Wait for something to become available.
327	*/
328	struct pollfd aFDs[2];
329	aFDs[0].fd = vde_datafd(pThis->pVdeConn);
330	aFDs[0].events = POLLIN \| POLLPRI;
331	aFDs[0].revents = 0;
332	aFDs[1].fd = RTPipeToNative(pThis->hPipeRead);
333	aFDs[1].events = POLLIN \| POLLPRI \| POLLERR \| POLLHUP;
334	aFDs[1].revents = 0;
335	STAM_PROFILE_ADV_STOP(&pThis->StatReceive, a);
336	errno=0;
337	int rc = poll(&aFDs[0], RT_ELEMENTS(aFDs), -1 /* infinite */);
338
339	/* this might have changed in the meantime */
340	if (pThread->enmState != PDMTHREADSTATE_RUNNING)
341	break;
342
343	STAM_PROFILE_ADV_START(&pThis->StatReceive, a);
344	if ( rc > 0
345	&& (aFDs[0].revents & (POLLIN \| POLLPRI))
346	&& !aFDs[1].revents)
347	{
348	/*
349	* Read the frame.
350	*/
351	char achBuf[16384];
352	ssize_t cbRead = 0;
353	cbRead = vde_recv(pThis->pVdeConn, achBuf, sizeof(achBuf), 0);
354	rc = cbRead < 0 ? RTErrConvertFromErrno(-cbRead) : VINF_SUCCESS;
355	if (RT_SUCCESS(rc))
356	{
357	/*
358	* Wait for the device to have space for this frame.
359	* Most guests use frame-sized receive buffers, hence non-zero cbMax
360	* automatically means there is enough room for entire frame. Some
361	* guests (eg. Solaris) use large chains of small receive buffers
362	* (each 128 or so bytes large). We will still start receiving as soon
363	* as cbMax is non-zero because:
364	* - it would be quite expensive for pfnCanReceive to accurately
365	* determine free receive buffer space
366	* - if we were waiting for enough free buffers, there is a risk
367	* of deadlocking because the guest could be waiting for a receive
368	* overflow error to allocate more receive buffers
369	*/
370	STAM_PROFILE_ADV_STOP(&pThis->StatReceive, a);
371	int rc1 = pThis->pIAboveNet->pfnWaitReceiveAvail(pThis->pIAboveNet, RT_INDEFINITE_WAIT);
372	STAM_PROFILE_ADV_START(&pThis->StatReceive, a);
373
374	/*
375	* A return code != VINF_SUCCESS means that we were woken up during a VM
376	* state transition. Drop the packet and wait for the next one.
377	*/
378	if (RT_FAILURE(rc1))
379	continue;
380
381	/*
382	* Pass the data up.
383	*/
384	#ifdef LOG_ENABLED
385	uint64_t u64Now = RTTimeProgramNanoTS();
386	LogFlow(("drvVDEAsyncIoThread: %-4d bytes at %llu ns deltas: r=%llu t=%llu\n",
387	cbRead, u64Now, u64Now - pThis->u64LastReceiveTS, u64Now - pThis->u64LastTransferTS));
388	pThis->u64LastReceiveTS = u64Now;
389	#endif
390	Log2(("drvVDEAsyncIoThread: cbRead=%#x\n" "%.*Rhxd\n", cbRead, cbRead, achBuf));
391	STAM_COUNTER_INC(&pThis->StatPktRecv);
392	STAM_COUNTER_ADD(&pThis->StatPktRecvBytes, cbRead);
393	rc1 = pThis->pIAboveNet->pfnReceive(pThis->pIAboveNet, achBuf, cbRead);
394	AssertRC(rc1);
395	}
396	else
397	{
398	LogFlow(("drvVDEAsyncIoThread: RTFileRead -> %Rrc\n", rc));
399	if (rc == VERR_INVALID_HANDLE)
400	break;
401	RTThreadYield();
402	}
403	}
404	else if ( rc > 0
405	&& aFDs[1].revents)
406	{
407	LogFlow(("drvVDEAsyncIoThread: Control message: enmState=%d revents=%#x\n", pThread->enmState, aFDs[1].revents));
408	if (aFDs[1].revents & (POLLHUP \| POLLERR \| POLLNVAL))
409	break;
410
411	/* drain the pipe */
412	char ch;
413	size_t cbRead;
414	RTPipeRead(pThis->hPipeRead, &ch, 1, &cbRead);
415	}
416	else
417	{
418	/*
419	* poll() failed for some reason. Yield to avoid eating too much CPU.
420	*
421	* EINTR errors have been seen frequently. They should be harmless, even
422	* if they are not supposed to occur in our setup.
423	*/
424	if (errno == EINTR)
425	Log(("rc=%d revents=%#x,%#x errno=%p %s\n", rc, aFDs[0].revents, aFDs[1].revents, errno, strerror(errno)));
426	else
427	AssertMsgFailed(("rc=%d revents=%#x,%#x errno=%p %s\n", rc, aFDs[0].revents, aFDs[1].revents, errno, strerror(errno)));
428	RTThreadYield();
429	}
430	}
431
432
433	LogFlow(("drvVDEAsyncIoThread: returns %Rrc\n", VINF_SUCCESS));
434	STAM_PROFILE_ADV_STOP(&pThis->StatReceive, a);
435	return VINF_SUCCESS;
436	}
437
438
439	/**
440	* Unblock the send thread so it can respond to a state change.
441	*
442	* @returns VBox status code.
443	* @param pDevIns The pcnet device instance.
444	* @param pThread The send thread.
445	*/
446	static DECLCALLBACK(int) drvVDEAsyncIoWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
447	{
448	RT_NOREF(pThread);
449	PDRVVDE pThis = PDMINS_2_DATA(pDrvIns, PDRVVDE);
450
451	size_t cbIgnored;
452	int rc = RTPipeWrite(pThis->hPipeWrite, "", 1, &cbIgnored);
453	AssertRC(rc);
454
455	return VINF_SUCCESS;
456	}
457
458
459	/* -=-=-=-=- PDMIBASE -=-=-=-=- */
460
461	/**
462	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
463	*/
464	static DECLCALLBACK(void ) drvVDEQueryInterface(PPDMIBASE pInterface, const char pszIID)
465	{
466	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
467	PDRVVDE pThis = PDMINS_2_DATA(pDrvIns, PDRVVDE);
468
469	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
470	PDMIBASE_RETURN_INTERFACE(pszIID, PDMINETWORKUP, &pThis->INetworkUp);
471	return NULL;
472	}
473
474	/* -=-=-=-=- PDMDRVREG -=-=-=-=- */
475
476	/**
477	* Destruct a driver instance.
478	*
479	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
480	* resources can be freed correctly.
481	*
482	* @param pDrvIns The driver instance data.
483	*/
484	static DECLCALLBACK(void) drvVDEDestruct(PPDMDRVINS pDrvIns)
485	{
486	LogFlow(("drvVDEDestruct\n"));
487	PDRVVDE pThis = PDMINS_2_DATA(pDrvIns, PDRVVDE);
488	PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
489
490	/*
491	* Terminate the control pipe.
492	*/
493	if (pThis->hPipeWrite != NIL_RTPIPE)
494	{
495	RTPipeClose(pThis->hPipeWrite);
496	pThis->hPipeWrite = NIL_RTPIPE;
497	}
498	if (pThis->hPipeRead != NIL_RTPIPE)
499	{
500	RTPipeClose(pThis->hPipeRead);
501	pThis->hPipeRead = NIL_RTPIPE;
502	}
503
504	MMR3HeapFree(pThis->pszDeviceName);
505	pThis->pszDeviceName = NULL;
506
507	/*
508	* Kill the xmit lock.
509	*/
510	if (RTCritSectIsInitialized(&pThis->XmitLock))
511	RTCritSectDelete(&pThis->XmitLock);
512
513	if (pThis->pVdeConn)
514	{
515	vde_close(pThis->pVdeConn);
516	pThis->pVdeConn = NULL;
517	}
518
519	#ifdef VBOX_WITH_STATISTICS
520	/*
521	* Deregister statistics.
522	*/
523	PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatPktSent);
524	PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatPktSentBytes);
525	PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatPktRecv);
526	PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatPktRecvBytes);
527	PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatTransmit);
528	PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatReceive);
529	#endif /* VBOX_WITH_STATISTICS */
530	}
531
532
533	/**
534	* Construct a VDE network transport driver instance.
535	*
536	* @copydoc FNPDMDRVCONSTRUCT
537	*/
538	static DECLCALLBACK(int) drvVDEConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
539	{
540	RT_NOREF(fFlags);
541	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
542	PDRVVDE pThis = PDMINS_2_DATA(pDrvIns, PDRVVDE);
543
544	/*
545	* Init the static parts.
546	*/
547	pThis->pDrvIns = pDrvIns;
548	pThis->pszDeviceName = NULL;
549	pThis->hPipeRead = NIL_RTPIPE;
550	pThis->hPipeWrite = NIL_RTPIPE;
551
552	/* IBase */
553	pDrvIns->IBase.pfnQueryInterface = drvVDEQueryInterface;
554	/* INetwork */
555	pThis->INetworkUp.pfnBeginXmit = drvVDENetworkUp_BeginXmit;
556	pThis->INetworkUp.pfnAllocBuf = drvVDENetworkUp_AllocBuf;
557	pThis->INetworkUp.pfnFreeBuf = drvVDENetworkUp_FreeBuf;
558	pThis->INetworkUp.pfnSendBuf = drvVDENetworkUp_SendBuf;
559	pThis->INetworkUp.pfnEndXmit = drvVDENetworkUp_EndXmit;
560	pThis->INetworkUp.pfnSetPromiscuousMode = drvVDENetworkUp_SetPromiscuousMode;
561	pThis->INetworkUp.pfnNotifyLinkChanged = drvVDENetworkUp_NotifyLinkChanged;
562
563	#ifdef VBOX_WITH_STATISTICS
564	/*
565	* Statistics.
566	*/
567	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktSent, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of sent packets.", "/Drivers/VDE%d/Packets/Sent", pDrvIns->iInstance);
568	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktSentBytes, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_BYTES, "Number of sent bytes.", "/Drivers/VDE%d/Bytes/Sent", pDrvIns->iInstance);
569	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktRecv, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of received packets.", "/Drivers/VDE%d/Packets/Received", pDrvIns->iInstance);
570	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktRecvBytes, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_BYTES, "Number of received bytes.", "/Drivers/VDE%d/Bytes/Received", pDrvIns->iInstance);
571	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatTransmit, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_CALL, "Profiling packet transmit runs.", "/Drivers/VDE%d/Transmit", pDrvIns->iInstance);
572	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatReceive, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_CALL, "Profiling packet receive runs.", "/Drivers/VDE%d/Receive", pDrvIns->iInstance);
573	#endif /* VBOX_WITH_STATISTICS */
574
575	/*
576	* Validate the config.
577	*/
578	if (!CFGMR3AreValuesValid(pCfg, "network"))
579	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES, "");
580
581	/*
582	* Check that no-one is attached to us.
583	*/
584	AssertMsgReturn(PDMDrvHlpNoAttach(pDrvIns) == VERR_PDM_NO_ATTACHED_DRIVER,
585	("Configuration error: Not possible to attach anything to this driver!\n"),
586	VERR_PDM_DRVINS_NO_ATTACH);
587
588	/*
589	* Query the network port interface.
590	*/
591	pThis->pIAboveNet = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMINETWORKDOWN);
592	if (!pThis->pIAboveNet)
593	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
594	N_("Configuration error: The above device/driver didn't export the network port interface"));
595
596	/*
597	* Read the configuration.
598	*/
599	int rc;
600	char szNetwork[RTPATH_MAX];
601	rc = CFGMR3QueryString(pCfg, "network", szNetwork, sizeof(szNetwork));
602	if (RT_FAILURE(rc))
603	*szNetwork=0;
604
605	if (RT_FAILURE(DrvVDELoadVDEPlug()))
606	return PDMDrvHlpVMSetError(pDrvIns, VERR_PDM_HIF_OPEN_FAILED, RT_SRC_POS,
607	N_("VDEplug library: not found"));
608	pThis->pVdeConn = vde_open(szNetwork, "VirtualBOX", NULL);
609	if (pThis->pVdeConn == NULL)
610	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_PDM_HIF_OPEN_FAILED, RT_SRC_POS,
611	N_("Failed to connect to the VDE SWITCH"));
612
613	/*
614	* Create the transmit lock.
615	*/
616	rc = RTCritSectInit(&pThis->XmitLock);
617	AssertRCReturn(rc, rc);
618
619	/*
620	* Create the control pipe.
621	*/
622	rc = RTPipeCreate(&pThis->hPipeRead, &pThis->hPipeWrite, 0 /fFlags/);
623	AssertRCReturn(rc, rc);
624
625	/*
626	* Create the async I/O thread.
627	*/
628	rc = PDMDrvHlpThreadCreate(pDrvIns, &pThis->pThread, pThis, drvVDEAsyncIoThread, drvVDEAsyncIoWakeup, 128 * _1K, RTTHREADTYPE_IO, "VDE");
629	AssertRCReturn(rc, rc);
630
631	return rc;
632	}
633
634
635	/**
636	* VDE network transport driver registration record.
637	*/
638	const PDMDRVREG g_DrvVDE =
639	{
640	/* u32Version */
641	PDM_DRVREG_VERSION,
642	/* szName */
643	"VDE",
644	/* szRCMod */
645	"",
646	/* szR0Mod */
647	"",
648	/* pszDescription */
649	"VDE Network Transport Driver",
650	/* fFlags */
651	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
652	/* fClass. */
653	PDM_DRVREG_CLASS_NETWORK,
654	/* cMaxInstances */
655	~0U,
656	/* cbInstance */
657	sizeof(DRVVDE),
658	/* pfnConstruct */
659	drvVDEConstruct,
660	/* pfnDestruct */
661	drvVDEDestruct,
662	/* pfnRelocate */
663	NULL,
664	/* pfnIOCtl */
665	NULL,
666	/* pfnPowerOn */
667	NULL,
668	/* pfnReset */
669	NULL,
670	/* pfnSuspend */
671	NULL, /** @todo Do power on, suspend and resume handlers! */
672	/* pfnResume */
673	NULL,
674	/* pfnAttach */
675	NULL,
676	/* pfnDetach */
677	NULL,
678	/* pfnPowerOff */
679	NULL,
680	/* pfnSoftReset */
681	NULL,
682	/* u32EndVersion */
683	PDM_DRVREG_VERSION
684	};
685

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source: vbox/trunk/src/VBox/Devices/Network/DrvVDE.cpp@ 86327

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