DrvVDE.cpp@ 44582

Last change on this file since 44582 was 44528, checked in by vboxsync, 12 years ago
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1	/* $Id: DrvVDE.cpp 44528 2013-02-04 14:27:54Z vboxsync $ */
2	/** @file
3	* VDE network transport driver.
4	*/
5
6	/*
7	* Contributed by Renzo Davoli. VirtualSquare. University of Bologna, 2010
8	* Copyright (C) 2006-2012 Oracle Corporation
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 (GPL) as published by the Free Software
14	* Foundation, in version 2 as it comes in the "COPYING" file of the
15	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
16	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
17	*/
18
19	/*******************************************************************************
20	* Header Files *
21	*******************************************************************************/
22	#define LOG_GROUP LOG_GROUP_DRV_TUN
23	#include <VBox/log.h>
24	#include <VBox/vmm/pdmdrv.h>
25	#include <VBox/vmm/pdmnetifs.h>
26	#include <VBox/vmm/pdmnetinline.h>
27	#include <VBox/VDEPlug.h>
28
29	#include <iprt/asm.h>
30	#include <iprt/assert.h>
31	#include <iprt/ctype.h>
32	#include <iprt/file.h>
33	#include <iprt/mem.h>
34	#include <iprt/param.h>
35	#include <iprt/path.h>
36	#include <iprt/pipe.h>
37	#include <iprt/semaphore.h>
38	#include <iprt/string.h>
39	#include <iprt/thread.h>
40	#include <iprt/uuid.h>
41
42	#include <sys/ioctl.h>
43	#include <sys/poll.h>
44	#include <sys/fcntl.h>
45	#include <errno.h>
46	#include <unistd.h>
47
48	#include "VBoxDD.h"
49
50
51	/*******************************************************************************
52	* Structures and Typedefs *
53	*******************************************************************************/
54	/**
55	* VDE driver instance data.
56	*
57	* @implements PDMINETWORKUP
58	*/
59	typedef struct DRVVDE
60	{
61	/** The network interface. */
62	PDMINETWORKUP INetworkUp;
63	/** The network interface. */
64	PPDMINETWORKDOWN pIAboveNet;
65	/** Pointer to the driver instance. */
66	PPDMDRVINS pDrvIns;
67	/** The configured VDE device name. */
68	char *pszDeviceName;
69	/** The write end of the control pipe. */
70	RTPIPE hPipeWrite;
71	/** The read end of the control pipe. */
72	RTPIPE hPipeRead;
73	/** Reader thread. */
74	PPDMTHREAD pThread;
75	/** The connection to the VDE switch */
76	VDECONN *pVdeConn;
77
78	/** @todo The transmit thread. */
79	/** Transmit lock used by drvTAPNetworkUp_BeginXmit. */
80	RTCRITSECT XmitLock;
81
82	#ifdef VBOX_WITH_STATISTICS
83	/** Number of sent packets. */
84	STAMCOUNTER StatPktSent;
85	/** Number of sent bytes. */
86	STAMCOUNTER StatPktSentBytes;
87	/** Number of received packets. */
88	STAMCOUNTER StatPktRecv;
89	/** Number of received bytes. */
90	STAMCOUNTER StatPktRecvBytes;
91	/** Profiling packet transmit runs. */
92	STAMPROFILE StatTransmit;
93	/** Profiling packet receive runs. */
94	STAMPROFILEADV StatReceive;
95	#endif /* VBOX_WITH_STATISTICS */
96
97	#ifdef LOG_ENABLED
98	/** The nano ts of the last transfer. */
99	uint64_t u64LastTransferTS;
100	/** The nano ts of the last receive. */
101	uint64_t u64LastReceiveTS;
102	#endif
103	} DRVVDE, *PDRVVDE;
104
105
106	/** Converts a pointer to VDE::INetworkUp to a PRDVVDE. */
107	#define PDMINETWORKUP_2_DRVVDE(pInterface) ( (PDRVVDE)((uintptr_t)pInterface - RT_OFFSETOF(DRVVDE, INetworkUp)) )
108
109
110	/*******************************************************************************
111	* Internal Functions *
112	*******************************************************************************/
113
114
115
116	/**
117	* @interface_method_impl{PDMINETWORKUP,pfnBeginXmit}
118	*/
119	static DECLCALLBACK(int) drvVDENetworkUp_BeginXmit(PPDMINETWORKUP pInterface, bool fOnWorkerThread)
120	{
121	PDRVVDE pThis = PDMINETWORKUP_2_DRVVDE(pInterface);
122	int rc = RTCritSectTryEnter(&pThis->XmitLock);
123	if (RT_FAILURE(rc))
124	{
125	/** @todo XMIT thread */
126	rc = VERR_TRY_AGAIN;
127	}
128	return rc;
129	}
130
131
132	/**
133	* @interface_method_impl{PDMINETWORKUP,pfnAllocBuf}
134	*/
135	static DECLCALLBACK(int) drvVDENetworkUp_AllocBuf(PPDMINETWORKUP pInterface, size_t cbMin,
136	PCPDMNETWORKGSO pGso, PPPDMSCATTERGATHER ppSgBuf)
137	{
138	PDRVVDE pThis = PDMINETWORKUP_2_DRVVDE(pInterface);
139	Assert(RTCritSectIsOwner(&pThis->XmitLock));
140
141	/*
142	* Allocate a scatter / gather buffer descriptor that is immediately
143	* followed by the buffer space of its single segment. The GSO context
144	* comes after that again.
145	*/
146	PPDMSCATTERGATHER pSgBuf = (PPDMSCATTERGATHER)RTMemAlloc( RT_ALIGN_Z(sizeof(*pSgBuf), 16)
147	+ RT_ALIGN_Z(cbMin, 16)
148	+ (pGso ? RT_ALIGN_Z(sizeof(*pGso), 16) : 0));
149	if (!pSgBuf)
150	return VERR_NO_MEMORY;
151
152	/*
153	* Initialize the S/G buffer and return.
154	*/
155	pSgBuf->fFlags = PDMSCATTERGATHER_FLAGS_MAGIC \| PDMSCATTERGATHER_FLAGS_OWNER_1;
156	pSgBuf->cbUsed = 0;
157	pSgBuf->cbAvailable = RT_ALIGN_Z(cbMin, 16);
158	pSgBuf->pvAllocator = NULL;
159	if (!pGso)
160	pSgBuf->pvUser = NULL;
161	else
162	{
163	pSgBuf->pvUser = (uint8_t *)(pSgBuf + 1) + pSgBuf->cbAvailable;
164	(PPDMNETWORKGSO)pSgBuf->pvUser = pGso;
165	}
166	pSgBuf->cSegs = 1;
167	pSgBuf->aSegs[0].cbSeg = pSgBuf->cbAvailable;
168	pSgBuf->aSegs[0].pvSeg = pSgBuf + 1;
169
170	#if 0 /* poison */
171	memset(pSgBuf->aSegs[0].pvSeg, 'F', pSgBuf->aSegs[0].cbSeg);
172	#endif
173	*ppSgBuf = pSgBuf;
174	return VINF_SUCCESS;
175	}
176
177
178	/**
179	* @interface_method_impl{PDMINETWORKUP,pfnFreeBuf}
180	*/
181	static DECLCALLBACK(int) drvVDENetworkUp_FreeBuf(PPDMINETWORKUP pInterface, PPDMSCATTERGATHER pSgBuf)
182	{
183	PDRVVDE pThis = PDMINETWORKUP_2_DRVVDE(pInterface);
184	Assert(RTCritSectIsOwner(&pThis->XmitLock));
185	if (pSgBuf)
186	{
187	Assert((pSgBuf->fFlags & PDMSCATTERGATHER_FLAGS_MAGIC_MASK) == PDMSCATTERGATHER_FLAGS_MAGIC);
188	pSgBuf->fFlags = 0;
189	RTMemFree(pSgBuf);
190	}
191	return VINF_SUCCESS;
192	}
193
194
195	/**
196	* @interface_method_impl{PDMINETWORKUP,pfnSendBuf}
197	*/
198	static DECLCALLBACK(int) drvVDENetworkUp_SendBuf(PPDMINETWORKUP pInterface, PPDMSCATTERGATHER pSgBuf, bool fOnWorkerThread)
199	{
200	PDRVVDE pThis = PDMINETWORKUP_2_DRVVDE(pInterface);
201	STAM_COUNTER_INC(&pThis->StatPktSent);
202	STAM_COUNTER_ADD(&pThis->StatPktSentBytes, pSgBuf->cbUsed);
203	STAM_PROFILE_START(&pThis->StatTransmit, a);
204
205	AssertPtr(pSgBuf);
206	Assert((pSgBuf->fFlags & PDMSCATTERGATHER_FLAGS_MAGIC_MASK) == PDMSCATTERGATHER_FLAGS_MAGIC);
207	Assert(RTCritSectIsOwner(&pThis->XmitLock));
208
209	/* Set an FTM checkpoint as this operation changes the state permanently. */
210	PDMDrvHlpFTSetCheckpoint(pThis->pDrvIns, FTMCHECKPOINTTYPE_NETWORK);
211
212	int rc;
213	if (!pSgBuf->pvUser)
214	{
215	#ifdef LOG_ENABLED
216	uint64_t u64Now = RTTimeProgramNanoTS();
217	LogFlow(("drvVDESend: %-4d bytes at %llu ns deltas: r=%llu t=%llu\n",
218	pSgBuf->cbUsed, u64Now, u64Now - pThis->u64LastReceiveTS, u64Now - pThis->u64LastTransferTS));
219	pThis->u64LastTransferTS = u64Now;
220	#endif
221	Log2(("drvVDESend: pSgBuf->aSegs[0].pvSeg=%p pSgBuf->cbUsed=%#x\n"
222	"%.*Rhxd\n",
223	pSgBuf->aSegs[0].pvSeg, pSgBuf->cbUsed, pSgBuf->cbUsed, pSgBuf->aSegs[0].pvSeg));
224
225	ssize_t cbSent;
226	cbSent = vde_send(pThis->pVdeConn, pSgBuf->aSegs[0].pvSeg, pSgBuf->cbUsed, 0);
227	rc = cbSent < 0 ? RTErrConvertFromErrno(-cbSent) : VINF_SUCCESS;
228	}
229	else
230	{
231	uint8_t abHdrScratch[256];
232	uint8_t const pbFrame = (uint8_t const )pSgBuf->aSegs[0].pvSeg;
233	PCPDMNETWORKGSO pGso = (PCPDMNETWORKGSO)pSgBuf->pvUser;
234	uint32_t const cSegs = PDMNetGsoCalcSegmentCount(pGso, pSgBuf->cbUsed); Assert(cSegs > 1);
235	rc = 0;
236	for (size_t iSeg = 0; iSeg < cSegs; iSeg++)
237	{
238	uint32_t cbSegFrame;
239	void pvSegFrame = PDMNetGsoCarveSegmentQD(pGso, (uint8_t )pbFrame, pSgBuf->cbUsed, abHdrScratch,
240	iSeg, cSegs, &cbSegFrame);
241	ssize_t cbSent;
242	cbSent = vde_send(pThis->pVdeConn, pvSegFrame, cbSegFrame, 0);
243	rc = cbSent < 0 ? RTErrConvertFromErrno(-cbSent) : VINF_SUCCESS;
244	if (RT_FAILURE(rc))
245	break;
246	}
247	}
248
249	pSgBuf->fFlags = 0;
250	RTMemFree(pSgBuf);
251
252	STAM_PROFILE_STOP(&pThis->StatTransmit, a);
253	AssertRC(rc);
254	if (RT_FAILURE(rc))
255	rc = rc == VERR_NO_MEMORY ? VERR_NET_NO_BUFFER_SPACE : VERR_NET_DOWN;
256	return rc;
257	}
258
259
260	/**
261	* @interface_method_impl{PDMINETWORKUP,pfnEndXmit}
262	*/
263	static DECLCALLBACK(void) drvVDENetworkUp_EndXmit(PPDMINETWORKUP pInterface)
264	{
265	PDRVVDE pThis = PDMINETWORKUP_2_DRVVDE(pInterface);
266	RTCritSectLeave(&pThis->XmitLock);
267	}
268
269
270	/**
271	* @interface_method_impl{PDMINETWORKUP,pfnSetPromiscuousMode}
272	*/
273	static DECLCALLBACK(void) drvVDENetworkUp_SetPromiscuousMode(PPDMINETWORKUP pInterface, bool fPromiscuous)
274	{
275	LogFlow(("drvVDESetPromiscuousMode: fPromiscuous=%d\n", fPromiscuous));
276	/* nothing to do */
277	}
278
279
280	/**
281	* Notification on link status changes.
282	*
283	* @param pInterface Pointer to the interface structure containing the called function pointer.
284	* @param enmLinkState The new link state.
285	* @thread EMT
286	*/
287	static DECLCALLBACK(void) drvVDENetworkUp_NotifyLinkChanged(PPDMINETWORKUP pInterface, PDMNETWORKLINKSTATE enmLinkState)
288	{
289	LogFlow(("drvNATNetworkUp_NotifyLinkChanged: enmLinkState=%d\n", enmLinkState));
290	/** @todo take action on link down and up. Stop the polling and such like. */
291	}
292
293
294	/**
295	* Asynchronous I/O thread for handling receive.
296	*
297	* @returns VINF_SUCCESS (ignored).
298	* @param Thread Thread handle.
299	* @param pvUser Pointer to a DRVVDE structure.
300	*/
301	static DECLCALLBACK(int) drvVDEAsyncIoThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
302	{
303	PDRVVDE pThis = PDMINS_2_DATA(pDrvIns, PDRVVDE);
304	LogFlow(("drvVDEAsyncIoThread: pThis=%p\n", pThis));
305
306	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
307	return VINF_SUCCESS;
308
309	STAM_PROFILE_ADV_START(&pThis->StatReceive, a);
310
311	/*
312	* Polling loop.
313	*/
314	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
315	{
316	/*
317	* Wait for something to become available.
318	*/
319	struct pollfd aFDs[2];
320	aFDs[0].fd = vde_datafd(pThis->pVdeConn);
321	aFDs[0].events = POLLIN \| POLLPRI;
322	aFDs[0].revents = 0;
323	aFDs[1].fd = RTPipeToNative(pThis->hPipeRead);
324	aFDs[1].events = POLLIN \| POLLPRI \| POLLERR \| POLLHUP;
325	aFDs[1].revents = 0;
326	STAM_PROFILE_ADV_STOP(&pThis->StatReceive, a);
327	errno=0;
328	int rc = poll(&aFDs[0], RT_ELEMENTS(aFDs), -1 /* infinite */);
329
330	/* this might have changed in the meantime */
331	if (pThread->enmState != PDMTHREADSTATE_RUNNING)
332	break;
333
334	STAM_PROFILE_ADV_START(&pThis->StatReceive, a);
335	if ( rc > 0
336	&& (aFDs[0].revents & (POLLIN \| POLLPRI))
337	&& !aFDs[1].revents)
338	{
339	/*
340	* Read the frame.
341	*/
342	char achBuf[16384];
343	ssize_t cbRead = 0;
344	cbRead = vde_recv(pThis->pVdeConn, achBuf, sizeof(achBuf), 0);
345	rc = cbRead < 0 ? RTErrConvertFromErrno(-cbRead) : VINF_SUCCESS;
346	if (RT_SUCCESS(rc))
347	{
348	/*
349	* Wait for the device to have space for this frame.
350	* Most guests use frame-sized receive buffers, hence non-zero cbMax
351	* automatically means there is enough room for entire frame. Some
352	* guests (eg. Solaris) use large chains of small receive buffers
353	* (each 128 or so bytes large). We will still start receiving as soon
354	* as cbMax is non-zero because:
355	* - it would be quite expensive for pfnCanReceive to accurately
356	* determine free receive buffer space
357	* - if we were waiting for enough free buffers, there is a risk
358	* of deadlocking because the guest could be waiting for a receive
359	* overflow error to allocate more receive buffers
360	*/
361	STAM_PROFILE_ADV_STOP(&pThis->StatReceive, a);
362	int rc1 = pThis->pIAboveNet->pfnWaitReceiveAvail(pThis->pIAboveNet, RT_INDEFINITE_WAIT);
363	STAM_PROFILE_ADV_START(&pThis->StatReceive, a);
364
365	/*
366	* A return code != VINF_SUCCESS means that we were woken up during a VM
367	* state transition. Drop the packet and wait for the next one.
368	*/
369	if (RT_FAILURE(rc1))
370	continue;
371
372	/*
373	* Pass the data up.
374	*/
375	#ifdef LOG_ENABLED
376	uint64_t u64Now = RTTimeProgramNanoTS();
377	LogFlow(("drvVDEAsyncIoThread: %-4d bytes at %llu ns deltas: r=%llu t=%llu\n",
378	cbRead, u64Now, u64Now - pThis->u64LastReceiveTS, u64Now - pThis->u64LastTransferTS));
379	pThis->u64LastReceiveTS = u64Now;
380	#endif
381	Log2(("drvVDEAsyncIoThread: cbRead=%#x\n" "%.*Rhxd\n", cbRead, cbRead, achBuf));
382	STAM_COUNTER_INC(&pThis->StatPktRecv);
383	STAM_COUNTER_ADD(&pThis->StatPktRecvBytes, cbRead);
384	rc1 = pThis->pIAboveNet->pfnReceive(pThis->pIAboveNet, achBuf, cbRead);
385	AssertRC(rc1);
386	}
387	else
388	{
389	LogFlow(("drvVDEAsyncIoThread: RTFileRead -> %Rrc\n", rc));
390	if (rc == VERR_INVALID_HANDLE)
391	break;
392	RTThreadYield();
393	}
394	}
395	else if ( rc > 0
396	&& aFDs[1].revents)
397	{
398	LogFlow(("drvVDEAsyncIoThread: Control message: enmState=%d revents=%#x\n", pThread->enmState, aFDs[1].revents));
399	if (aFDs[1].revents & (POLLHUP \| POLLERR \| POLLNVAL))
400	break;
401
402	/* drain the pipe */
403	char ch;
404	size_t cbRead;
405	RTPipeRead(pThis->hPipeRead, &ch, 1, &cbRead);
406	}
407	else
408	{
409	/*
410	* poll() failed for some reason. Yield to avoid eating too much CPU.
411	*
412	* EINTR errors have been seen frequently. They should be harmless, even
413	* if they are not supposed to occur in our setup.
414	*/
415	if (errno == EINTR)
416	Log(("rc=%d revents=%#x,%#x errno=%p %s\n", rc, aFDs[0].revents, aFDs[1].revents, errno, strerror(errno)));
417	else
418	AssertMsgFailed(("rc=%d revents=%#x,%#x errno=%p %s\n", rc, aFDs[0].revents, aFDs[1].revents, errno, strerror(errno)));
419	RTThreadYield();
420	}
421	}
422
423
424	LogFlow(("drvVDEAsyncIoThread: returns %Rrc\n", VINF_SUCCESS));
425	STAM_PROFILE_ADV_STOP(&pThis->StatReceive, a);
426	return VINF_SUCCESS;
427	}
428
429
430	/**
431	* Unblock the send thread so it can respond to a state change.
432	*
433	* @returns VBox status code.
434	* @param pDevIns The pcnet device instance.
435	* @param pThread The send thread.
436	*/
437	static DECLCALLBACK(int) drvVDEAsyncIoWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
438	{
439	PDRVVDE pThis = PDMINS_2_DATA(pDrvIns, PDRVVDE);
440
441	size_t cbIgnored;
442	int rc = RTPipeWrite(pThis->hPipeWrite, "", 1, &cbIgnored);
443	AssertRC(rc);
444
445	return VINF_SUCCESS;
446	}
447
448
449	/* -=-=-=-=- PDMIBASE -=-=-=-=- */
450
451	/**
452	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
453	*/
454	static DECLCALLBACK(void ) drvVDEQueryInterface(PPDMIBASE pInterface, const char pszIID)
455	{
456	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
457	PDRVVDE pThis = PDMINS_2_DATA(pDrvIns, PDRVVDE);
458
459	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
460	PDMIBASE_RETURN_INTERFACE(pszIID, PDMINETWORKUP, &pThis->INetworkUp);
461	return NULL;
462	}
463
464	/* -=-=-=-=- PDMDRVREG -=-=-=-=- */
465
466	/**
467	* Destruct a driver instance.
468	*
469	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
470	* resources can be freed correctly.
471	*
472	* @param pDrvIns The driver instance data.
473	*/
474	static DECLCALLBACK(void) drvVDEDestruct(PPDMDRVINS pDrvIns)
475	{
476	LogFlow(("drvVDEDestruct\n"));
477	PDRVVDE pThis = PDMINS_2_DATA(pDrvIns, PDRVVDE);
478	PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
479
480	/*
481	* Terminate the control pipe.
482	*/
483	RTPipeClose(pThis->hPipeWrite);
484	pThis->hPipeWrite = NIL_RTPIPE;
485	RTPipeClose(pThis->hPipeRead);
486	pThis->hPipeRead = NIL_RTPIPE;
487
488	MMR3HeapFree(pThis->pszDeviceName);
489
490	/*
491	* Kill the xmit lock.
492	*/
493	if (RTCritSectIsInitialized(&pThis->XmitLock))
494	RTCritSectDelete(&pThis->XmitLock);
495
496	vde_close(pThis->pVdeConn);
497	pThis->pVdeConn = NULL;
498
499	#ifdef VBOX_WITH_STATISTICS
500	/*
501	* Deregister statistics.
502	*/
503	PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatPktSent);
504	PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatPktSentBytes);
505	PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatPktRecv);
506	PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatPktRecvBytes);
507	PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatTransmit);
508	PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatReceive);
509	#endif /* VBOX_WITH_STATISTICS */
510	}
511
512
513	/**
514	* Construct a VDE network transport driver instance.
515	*
516	* @copydoc FNPDMDRVCONSTRUCT
517	*/
518	static DECLCALLBACK(int) drvVDEConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
519	{
520	PDRVVDE pThis = PDMINS_2_DATA(pDrvIns, PDRVVDE);
521	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
522
523	/*
524	* Init the static parts.
525	*/
526	pThis->pDrvIns = pDrvIns;
527	pThis->pszDeviceName = NULL;
528	pThis->hPipeRead = NIL_RTPIPE;
529	pThis->hPipeWrite = NIL_RTPIPE;
530
531	/* IBase */
532	pDrvIns->IBase.pfnQueryInterface = drvVDEQueryInterface;
533	/* INetwork */
534	pThis->INetworkUp.pfnBeginXmit = drvVDENetworkUp_BeginXmit;
535	pThis->INetworkUp.pfnAllocBuf = drvVDENetworkUp_AllocBuf;
536	pThis->INetworkUp.pfnFreeBuf = drvVDENetworkUp_FreeBuf;
537	pThis->INetworkUp.pfnSendBuf = drvVDENetworkUp_SendBuf;
538	pThis->INetworkUp.pfnEndXmit = drvVDENetworkUp_EndXmit;
539	pThis->INetworkUp.pfnSetPromiscuousMode = drvVDENetworkUp_SetPromiscuousMode;
540	pThis->INetworkUp.pfnNotifyLinkChanged = drvVDENetworkUp_NotifyLinkChanged;
541
542	#ifdef VBOX_WITH_STATISTICS
543	/*
544	* Statistics.
545	*/
546	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktSent, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of sent packets.", "/Drivers/VDE%d/Packets/Sent", pDrvIns->iInstance);
547	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktSentBytes, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_BYTES, "Number of sent bytes.", "/Drivers/VDE%d/Bytes/Sent", pDrvIns->iInstance);
548	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktRecv, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of received packets.", "/Drivers/VDE%d/Packets/Received", pDrvIns->iInstance);
549	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktRecvBytes, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_BYTES, "Number of received bytes.", "/Drivers/VDE%d/Bytes/Received", pDrvIns->iInstance);
550	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatTransmit, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_CALL, "Profiling packet transmit runs.", "/Drivers/VDE%d/Transmit", pDrvIns->iInstance);
551	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatReceive, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_CALL, "Profiling packet receive runs.", "/Drivers/VDE%d/Receive", pDrvIns->iInstance);
552	#endif /* VBOX_WITH_STATISTICS */
553
554	/*
555	* Validate the config.
556	*/
557	if (!CFGMR3AreValuesValid(pCfg, "network"))
558	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES, "");
559
560	/*
561	* Check that no-one is attached to us.
562	*/
563	AssertMsgReturn(PDMDrvHlpNoAttach(pDrvIns) == VERR_PDM_NO_ATTACHED_DRIVER,
564	("Configuration error: Not possible to attach anything to this driver!\n"),
565	VERR_PDM_DRVINS_NO_ATTACH);
566
567	/*
568	* Query the network port interface.
569	*/
570	pThis->pIAboveNet = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMINETWORKDOWN);
571	if (!pThis->pIAboveNet)
572	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
573	N_("Configuration error: The above device/driver didn't export the network port interface"));
574
575	/*
576	* Read the configuration.
577	*/
578	int rc;
579	char szNetwork[RTPATH_MAX];
580	rc = CFGMR3QueryString(pCfg, "network", szNetwork, sizeof(szNetwork));
581	if (RT_FAILURE(rc))
582	*szNetwork=0;
583
584	if (RT_FAILURE(DrvVDELoadVDEPlug()))
585	return PDMDrvHlpVMSetError(pDrvIns, VERR_PDM_HIF_OPEN_FAILED, RT_SRC_POS,
586	N_("VDEplug library: not found"));
587	pThis->pVdeConn = vde_open(szNetwork, "VirtualBOX", NULL);
588	if (pThis->pVdeConn == NULL)
589	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_PDM_HIF_OPEN_FAILED, RT_SRC_POS,
590	N_("Failed to connect to the VDE SWITCH"));
591
592	/*
593	* Create the transmit lock.
594	*/
595	rc = RTCritSectInit(&pThis->XmitLock);
596	AssertRCReturn(rc, rc);
597
598	/*
599	* Create the control pipe.
600	*/
601	rc = RTPipeCreate(&pThis->hPipeRead, &pThis->hPipeWrite, 0 /fFlags/);
602	AssertRCReturn(rc, rc);
603
604	/*
605	* Create the async I/O thread.
606	*/
607	rc = PDMDrvHlpThreadCreate(pDrvIns, &pThis->pThread, pThis, drvVDEAsyncIoThread, drvVDEAsyncIoWakeup, 128 * _1K, RTTHREADTYPE_IO, "VDE");
608	AssertRCReturn(rc, rc);
609
610	return rc;
611	}
612
613
614	/**
615	* VDE network transport driver registration record.
616	*/
617	const PDMDRVREG g_DrvVDE =
618	{
619	/* u32Version */
620	PDM_DRVREG_VERSION,
621	/* szName */
622	"VDE",
623	/* szRCMod */
624	"",
625	/* szR0Mod */
626	"",
627	/* pszDescription */
628	"VDE Network Transport Driver",
629	/* fFlags */
630	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
631	/* fClass. */
632	PDM_DRVREG_CLASS_NETWORK,
633	/* cMaxInstances */
634	~0U,
635	/* cbInstance */
636	sizeof(DRVVDE),
637	/* pfnConstruct */
638	drvVDEConstruct,
639	/* pfnDestruct */
640	drvVDEDestruct,
641	/* pfnRelocate */
642	NULL,
643	/* pfnIOCtl */
644	NULL,
645	/* pfnPowerOn */
646	NULL,
647	/* pfnReset */
648	NULL,
649	/* pfnSuspend */
650	NULL, /** @todo Do power on, suspend and resume handlers! */
651	/* pfnResume */
652	NULL,
653	/* pfnAttach */
654	NULL,
655	/* pfnDetach */
656	NULL,
657	/* pfnPowerOff */
658	NULL,
659	/* pfnSoftReset */
660	NULL,
661	/* u32EndVersion */
662	PDM_DRVREG_VERSION
663	};
664

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source: vbox/trunk/src/VBox/Devices/Network/DrvVDE.cpp@ 44582

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