VBoxNetFlt-linux.c@ 26943

Last change on this file since 26943 was 21682, checked in by vboxsync, 16 years ago
HostDrivers: xstr -> RT_XSTR.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 37.8 KB

Line
1	/* $Id: VBoxNetFlt-linux.c 21682 2009-07-17 13:20:21Z vboxsync $ */
2	/** @file
3	* VBoxNetFlt - Network Filter Driver (Host), Linux Specific Code.
4	*/
5
6	/*
7	* Copyright (C) 2006-2008 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22	/*******************************************************************************
23	* Header Files *
24	*******************************************************************************/
25	#include "the-linux-kernel.h"
26	#include "version-generated.h"
27	#include <linux/netdevice.h>
28	#include <linux/etherdevice.h>
29	#include <linux/rtnetlink.h>
30	#include <linux/miscdevice.h>
31	#include <linux/ip.h>
32
33	#define LOG_GROUP LOG_GROUP_NET_FLT_DRV
34	#include <VBox/log.h>
35	#include <VBox/err.h>
36	#include <iprt/alloca.h>
37	#include <iprt/assert.h>
38	#include <iprt/spinlock.h>
39	#include <iprt/semaphore.h>
40	#include <iprt/initterm.h>
41	#include <iprt/process.h>
42	#include <iprt/mem.h>
43	#include <iprt/log.h>
44	#include <iprt/mp.h>
45	#include <iprt/mem.h>
46	#include <iprt/time.h>
47
48	#define VBOXNETFLT_OS_SPECFIC 1
49	#include "../VBoxNetFltInternal.h"
50
51	#define VBOX_FLT_NB_TO_INST(pNB) ((PVBOXNETFLTINS)((uint8_t *)pNB - \
52	RT_OFFSETOF(VBOXNETFLTINS, u.s.Notifier)))
53	#define VBOX_FLT_PT_TO_INST(pPT) ((PVBOXNETFLTINS)((uint8_t *)pPT - \
54	RT_OFFSETOF(VBOXNETFLTINS, u.s.PacketType)))
55	#define VBOX_FLT_XT_TO_INST(pXT) ((PVBOXNETFLTINS)((uint8_t *)pXT - \
56	RT_OFFSETOF(VBOXNETFLTINS, u.s.XmitTask)))
57
58	#define VBOX_GET_PCOUNT(pDev) (pDev->promiscuity)
59
60	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 22)
61	# define VBOX_SKB_RESET_NETWORK_HDR(skb) skb_reset_network_header(skb)
62	# define VBOX_SKB_RESET_MAC_HDR(skb) skb_reset_mac_header(skb)
63	#else /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22) */
64	# define VBOX_SKB_RESET_NETWORK_HDR(skb) skb->nh.raw = skb->data
65	# define VBOX_SKB_RESET_MAC_HDR(skb) skb->mac.raw = skb->data
66	#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22) */
67
68	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
69	# define VBOX_SKB_CHECKSUM_HELP(skb) skb_checksum_help(skb)
70	#else /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19) */
71	# define CHECKSUM_PARTIAL CHECKSUM_HW
72	# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10)
73	# define VBOX_SKB_CHECKSUM_HELP(skb) skb_checksum_help(skb, 0)
74	# else /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 10) */
75	# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 7)
76	# define VBOX_SKB_CHECKSUM_HELP(skb) skb_checksum_help(&skb, 0)
77	# else /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 7) */
78	# define VBOX_SKB_CHECKSUM_HELP(skb) (!skb_checksum_help(skb))
79	# endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 7) */
80	# endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 10) */
81	#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19) */
82
83	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
84	# define VBOX_SKB_IS_GSO(skb) skb_is_gso(skb)
85	/* No features, very dumb device */
86	# define VBOX_SKB_GSO_SEGMENT(skb) skb_gso_segment(skb, 0)
87	#else /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18) */
88	# define VBOX_SKB_IS_GSO(skb) false
89	# define VBOX_SKB_GSO_SEGMENT(skb) NULL
90	#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18) */
91
92	#ifndef NET_IP_ALIGN
93	# define NET_IP_ALIGN 2
94	#endif
95
96	#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 12)
97	unsigned dev_get_flags(const struct net_device *dev)
98	{
99	unsigned flags;
100
101	flags = (dev->flags & ~(IFF_PROMISC \|
102	IFF_ALLMULTI \|
103	IFF_RUNNING)) \|
104	(dev->gflags & (IFF_PROMISC \|
105	IFF_ALLMULTI));
106
107	if (netif_running(dev) && netif_carrier_ok(dev))
108	flags \|= IFF_RUNNING;
109
110	return flags;
111	}
112	#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 12) */
113
114	/*******************************************************************************
115	* Internal Functions *
116	*******************************************************************************/
117	static int VBoxNetFltLinuxInit(void);
118	static void VBoxNetFltLinuxUnload(void);
119
120
121	/*******************************************************************************
122	* Global Variables *
123	*******************************************************************************/
124	/**
125	* The (common) global data.
126	*/
127	static VBOXNETFLTGLOBALS g_VBoxNetFltGlobals;
128
129	module_init(VBoxNetFltLinuxInit);
130	module_exit(VBoxNetFltLinuxUnload);
131
132	MODULE_AUTHOR("Sun Microsystems, Inc.");
133	MODULE_DESCRIPTION("VirtualBox Network Filter Driver");
134	MODULE_LICENSE("GPL");
135	#ifdef MODULE_VERSION
136	MODULE_VERSION(VBOX_VERSION_STRING " (" RT_XSTR(INTNETTRUNKIFPORT_VERSION) ")");
137	#endif
138
139
140	/**
141	* Initialize module.
142	*
143	* @returns appropriate status code.
144	*/
145	static int __init VBoxNetFltLinuxInit(void)
146	{
147	int rc;
148	/*
149	* Initialize IPRT.
150	*/
151	rc = RTR0Init(0);
152	if (RT_SUCCESS(rc))
153	{
154	Log(("VBoxNetFltLinuxInit\n"));
155
156	/*
157	* Initialize the globals and connect to the support driver.
158	*
159	* This will call back vboxNetFltOsOpenSupDrv (and maybe vboxNetFltOsCloseSupDrv)
160	* for establishing the connect to the support driver.
161	*/
162	memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
163	rc = vboxNetFltInitGlobalsAndIdc(&g_VBoxNetFltGlobals);
164	if (RT_SUCCESS(rc))
165	{
166	LogRel(("VBoxNetFlt: Successfully started.\n"));
167	return 0;
168	}
169
170	LogRel(("VBoxNetFlt: failed to initialize device extension (rc=%d)\n", rc));
171	RTR0Term();
172	}
173	else
174	LogRel(("VBoxNetFlt: failed to initialize IPRT (rc=%d)\n", rc));
175
176	memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
177	return -RTErrConvertToErrno(rc);
178	}
179
180
181	/**
182	* Unload the module.
183	*
184	* @todo We have to prevent this if we're busy!
185	*/
186	static void __exit VBoxNetFltLinuxUnload(void)
187	{
188	int rc;
189	Log(("VBoxNetFltLinuxUnload\n"));
190	Assert(vboxNetFltCanUnload(&g_VBoxNetFltGlobals));
191
192	/*
193	* Undo the work done during start (in reverse order).
194	*/
195	rc = vboxNetFltTryDeleteIdcAndGlobals(&g_VBoxNetFltGlobals);
196	AssertRC(rc); NOREF(rc);
197
198	RTR0Term();
199
200	memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
201
202	Log(("VBoxNetFltLinuxUnload - done\n"));
203	}
204
205
206	/**
207	* Reads and retains the host interface handle.
208	*
209	* @returns The handle, NULL if detached.
210	* @param pThis
211	*/
212	DECLINLINE(struct net_device *) vboxNetFltLinuxRetainNetDev(PVBOXNETFLTINS pThis)
213	{
214	#if 0
215	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
216	struct net_device *pDev = NULL;
217
218	Log(("vboxNetFltLinuxRetainNetDev\n"));
219	/*
220	* Be careful here to avoid problems racing the detached callback.
221	*/
222	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
223	if (!ASMAtomicUoReadBool(&pThis->fDisconnectedFromHost))
224	{
225	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
226	if (pDev)
227	{
228	dev_hold(pDev);
229	Log(("vboxNetFltLinuxRetainNetDev: Device %p(%s) retained. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
230	}
231	}
232	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
233
234	Log(("vboxNetFltLinuxRetainNetDev - done\n"));
235	return pDev;
236	#else
237	return (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
238	#endif
239	}
240
241
242	/**
243	* Release the host interface handle previously retained
244	* by vboxNetFltLinuxRetainNetDev.
245	*
246	* @param pThis The instance.
247	* @param pDev The vboxNetFltLinuxRetainNetDev
248	* return value, NULL is fine.
249	*/
250	DECLINLINE(void) vboxNetFltLinuxReleaseNetDev(PVBOXNETFLTINS pThis, struct net_device *pDev)
251	{
252	#if 0
253	Log(("vboxNetFltLinuxReleaseNetDev\n"));
254	NOREF(pThis);
255	if (pDev)
256	{
257	dev_put(pDev);
258	Log(("vboxNetFltLinuxReleaseNetDev: Device %p(%s) released. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
259	}
260	Log(("vboxNetFltLinuxReleaseNetDev - done\n"));
261	#endif
262	}
263
264	#define VBOXNETFLT_CB_TAG(skb) (0xA1C90000 \| (skb->dev->ifindex & 0xFFFF))
265	#define VBOXNETFLT_SKB_TAG(skb) ((uint32_t)&((skb)->cb[sizeof((skb)->cb)-sizeof(uint32_t)]))
266
267	/**
268	* Checks whether this is an mbuf created by vboxNetFltLinuxMBufFromSG,
269	* i.e. a buffer which we're pushing and should be ignored by the filter callbacks.
270	*
271	* @returns true / false accordingly.
272	* @param pBuf The sk_buff.
273	*/
274	DECLINLINE(bool) vboxNetFltLinuxSkBufIsOur(struct sk_buff *pBuf)
275	{
276	return VBOXNETFLT_SKB_TAG(pBuf) == VBOXNETFLT_CB_TAG(pBuf);
277	}
278
279
280	/**
281	* Internal worker that create a linux sk_buff for a
282	* (scatter/)gather list.
283	*
284	* @returns Pointer to the sk_buff.
285	* @param pThis The instance.
286	* @param pSG The (scatter/)gather list.
287	*/
288	static struct sk_buff *vboxNetFltLinuxSkBufFromSG(PVBOXNETFLTINS pThis, PINTNETSG pSG, bool fDstWire)
289	{
290	struct sk_buff *pPkt;
291	struct net_device *pDev;
292	/*
293	* Because we're lazy, we will ASSUME that all SGs coming from INTNET
294	* will only contain one single segment.
295	*/
296	if (pSG->cSegsUsed != 1 \|\| pSG->cbTotal != pSG->aSegs[0].cb)
297	{
298	LogRel(("VBoxNetFlt: Dropped multi-segment(%d) packet coming from internal network.\n", pSG->cSegsUsed));
299	return NULL;
300	}
301	if (pSG->cbTotal == 0)
302	{
303	LogRel(("VBoxNetFlt: Dropped empty packet coming from internal network.\n"));
304	return NULL;
305	}
306
307	/*
308	* Allocate a packet and copy over the data.
309	*
310	*/
311	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
312	pPkt = dev_alloc_skb(pSG->cbTotal + NET_IP_ALIGN);
313	if (pPkt)
314	{
315	pPkt->dev = pDev;
316	/* Align IP header on 16-byte boundary: 2 + 14 (ethernet hdr size). */
317	skb_reserve(pPkt, NET_IP_ALIGN);
318	skb_put(pPkt, pSG->cbTotal);
319	memcpy(pPkt->data, pSG->aSegs[0].pv, pSG->cbTotal);
320	/* Set protocol and packet_type fields. */
321	pPkt->protocol = eth_type_trans(pPkt, pDev);
322	pPkt->ip_summed = CHECKSUM_NONE;
323	if (fDstWire)
324	{
325	VBOX_SKB_RESET_NETWORK_HDR(pPkt);
326	/* Restore ethernet header back. */
327	skb_push(pPkt, ETH_HLEN);
328	VBOX_SKB_RESET_MAC_HDR(pPkt);
329	}
330	VBOXNETFLT_SKB_TAG(pPkt) = VBOXNETFLT_CB_TAG(pPkt);
331
332	return pPkt;
333	}
334	else
335	Log(("vboxNetFltLinuxSkBufFromSG: Failed to allocate sk_buff(%u).\n", pSG->cbTotal));
336	pSG->pvUserData = NULL;
337
338	return NULL;
339	}
340
341
342	/**
343	* Initializes a SG list from an sk_buff.
344	*
345	* @returns Number of segments.
346	* @param pThis The instance.
347	* @param pBuf The sk_buff.
348	* @param pSG The SG.
349	* @param pvFrame The frame pointer, optional.
350	* @param cSegs The number of segments allocated for the SG.
351	* This should match the number in the mbuf exactly!
352	* @param fSrc The source of the frame.
353	*/
354	DECLINLINE(void) vboxNetFltLinuxSkBufToSG(PVBOXNETFLTINS pThis, struct sk_buff *pBuf, PINTNETSG pSG, unsigned cSegs, uint32_t fSrc)
355	{
356	int i;
357	NOREF(pThis);
358
359	Assert(!skb_shinfo(pBuf)->frag_list);
360	pSG->pvOwnerData = NULL;
361	pSG->pvUserData = NULL;
362	pSG->pvUserData2 = NULL;
363	pSG->cUsers = 1;
364	pSG->fFlags = INTNETSG_FLAGS_TEMP;
365	pSG->cSegsAlloc = cSegs;
366
367	if (fSrc & INTNETTRUNKDIR_WIRE)
368	{
369	/*
370	* The packet came from wire, ethernet header was removed by device driver.
371	* Restore it.
372	*/
373	skb_push(pBuf, ETH_HLEN);
374	}
375	pSG->cbTotal = pBuf->len;
376	#ifdef VBOXNETFLT_SG_SUPPORT
377	pSG->aSegs[0].cb = skb_headlen(pBuf);
378	pSG->aSegs[0].pv = pBuf->data;
379	pSG->aSegs[0].Phys = NIL_RTHCPHYS;
380
381	for (i = 0; i < skb_shinfo(pBuf)->nr_frags; i++)
382	{
383	skb_frag_t *pFrag = &skb_shinfo(pBuf)->frags[i];
384	pSG->aSegs[i+1].cb = pFrag->size;
385	pSG->aSegs[i+1].pv = kmap(pFrag->page);
386	printk("%p = kmap()\n", pSG->aSegs[i+1].pv);
387	pSG->aSegs[i+1].Phys = NIL_RTHCPHYS;
388	}
389	pSG->cSegsUsed = ++i;
390	#else
391	pSG->aSegs[0].cb = pBuf->len;
392	pSG->aSegs[0].pv = pBuf->data;
393	pSG->aSegs[0].Phys = NIL_RTHCPHYS;
394	pSG->cSegsUsed = i = 1;
395	#endif
396
397
398	#ifdef PADD_RUNT_FRAMES_FROM_HOST
399	/*
400	* Add a trailer if the frame is too small.
401	*
402	* Since we're getting to the packet before it is framed, it has not
403	* yet been padded. The current solution is to add a segment pointing
404	* to a buffer containing all zeros and pray that works for all frames...
405	*/
406	if (pSG->cbTotal < 60 && (fSrc & INTNETTRUNKDIR_HOST))
407	{
408	static uint8_t const s_abZero[128] = {0};
409
410	AssertReturnVoid(i < cSegs);
411
412	pSG->aSegs[i].Phys = NIL_RTHCPHYS;
413	pSG->aSegs[i].pv = (void *)&s_abZero[0];
414	pSG->aSegs[i].cb = 60 - pSG->cbTotal;
415	pSG->cbTotal = 60;
416	pSG->cSegsUsed++;
417	}
418	#endif
419	Log4(("vboxNetFltLinuxSkBufToSG: allocated=%d, segments=%d frags=%d next=%p frag_list=%p pkt_type=%x fSrc=%x\n",
420	pSG->cSegsAlloc, pSG->cSegsUsed, skb_shinfo(pBuf)->nr_frags, pBuf->next, skb_shinfo(pBuf)->frag_list, pBuf->pkt_type, fSrc));
421	for (i = 0; i < pSG->cSegsUsed; i++)
422	Log4(("vboxNetFltLinuxSkBufToSG: #%d: cb=%d pv=%p\n",
423	i, pSG->aSegs[i].cb, pSG->aSegs[i].pv));
424	}
425
426	/**
427	* Packet handler,
428	*
429	* @returns 0 or EJUSTRETURN.
430	* @param pThis The instance.
431	* @param pMBuf The mbuf.
432	* @param pvFrame The start of the frame, optional.
433	* @param fSrc Where the packet (allegedly) comes from, one INTNETTRUNKDIR_* value.
434	* @param eProtocol The protocol.
435	*/
436	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 14)
437	static int vboxNetFltLinuxPacketHandler(struct sk_buff *pBuf,
438	struct net_device *pSkbDev,
439	struct packet_type *pPacketType,
440	struct net_device *pOrigDev)
441	#else
442	static int vboxNetFltLinuxPacketHandler(struct sk_buff *pBuf,
443	struct net_device *pSkbDev,
444	struct packet_type *pPacketType)
445	#endif
446	{
447	PVBOXNETFLTINS pThis;
448	struct net_device *pDev;
449	LogFlow(("vboxNetFltLinuxPacketHandler: pBuf=%p pSkbDev=%p pPacketType=%p\n",
450	pBuf, pSkbDev, pPacketType));
451	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
452	Log3(("vboxNetFltLinuxPacketHandler: skb len=%u data_len=%u truesize=%u next=%p nr_frags=%u gso_size=%u gso_seqs=%u gso_type=%x frag_list=%p pkt_type=%x\n",
453	pBuf->len, pBuf->data_len, pBuf->truesize, pBuf->next, skb_shinfo(pBuf)->nr_frags, skb_shinfo(pBuf)->gso_size, skb_shinfo(pBuf)->gso_segs, skb_shinfo(pBuf)->gso_type, skb_shinfo(pBuf)->frag_list, pBuf->pkt_type));
454	#else
455	Log3(("vboxNetFltLinuxPacketHandler: skb len=%u data_len=%u truesize=%u next=%p nr_frags=%u tso_size=%u tso_seqs=%u frag_list=%p pkt_type=%x\n",
456	pBuf->len, pBuf->data_len, pBuf->truesize, pBuf->next, skb_shinfo(pBuf)->nr_frags, skb_shinfo(pBuf)->tso_size, skb_shinfo(pBuf)->tso_segs, skb_shinfo(pBuf)->frag_list, pBuf->pkt_type));
457	#endif
458	/*
459	* Drop it immediately?
460	*/
461	if (!pBuf)
462	return 0;
463
464	pThis = VBOX_FLT_PT_TO_INST(pPacketType);
465	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
466	if (pThis->u.s.pDev != pSkbDev)
467	{
468	Log(("vboxNetFltLinuxPacketHandler: Devices do not match, pThis may be wrong! pThis=%p\n", pThis));
469	return 0;
470	}
471
472	Log4(("vboxNetFltLinuxPacketHandler: pBuf->cb dump:\n%.*Rhxd\n", sizeof(pBuf->cb), pBuf->cb));
473	if (vboxNetFltLinuxSkBufIsOur(pBuf))
474	{
475	Log2(("vboxNetFltLinuxPacketHandler: got our own sk_buff, drop it.\n"));
476	dev_kfree_skb(pBuf);
477	return 0;
478	}
479
480	#ifndef VBOXNETFLT_SG_SUPPORT
481	{
482	/*
483	* Get rid of fragmented packets, they cause too much trouble.
484	*/
485	struct sk_buff *pCopy = skb_copy(pBuf, GFP_ATOMIC);
486	kfree_skb(pBuf);
487	if (!pCopy)
488	{
489	LogRel(("VBoxNetFlt: Failed to allocate packet buffer, dropping the packet.\n"));
490	return 0;
491	}
492	pBuf = pCopy;
493	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
494	Log3(("vboxNetFltLinuxPacketHandler: skb copy len=%u data_len=%u truesize=%u next=%p nr_frags=%u gso_size=%u gso_seqs=%u gso_type=%x frag_list=%p pkt_type=%x\n",
495	pBuf->len, pBuf->data_len, pBuf->truesize, pBuf->next, skb_shinfo(pBuf)->nr_frags, skb_shinfo(pBuf)->gso_size, skb_shinfo(pBuf)->gso_segs, skb_shinfo(pBuf)->gso_type, skb_shinfo(pBuf)->frag_list, pBuf->pkt_type));
496	#else
497	Log3(("vboxNetFltLinuxPacketHandler: skb copy len=%u data_len=%u truesize=%u next=%p nr_frags=%u tso_size=%u tso_seqs=%u frag_list=%p pkt_type=%x\n",
498	pBuf->len, pBuf->data_len, pBuf->truesize, pBuf->next, skb_shinfo(pBuf)->nr_frags, skb_shinfo(pBuf)->tso_size, skb_shinfo(pBuf)->tso_segs, skb_shinfo(pBuf)->frag_list, pBuf->pkt_type));
499	#endif
500	}
501	#endif
502
503	/* Add the packet to transmit queue and schedule the bottom half. */
504	skb_queue_tail(&pThis->u.s.XmitQueue, pBuf);
505	schedule_work(&pThis->u.s.XmitTask);
506	Log4(("vboxNetFltLinuxPacketHandler: scheduled work %p for sk_buff %p\n",
507	&pThis->u.s.XmitTask, pBuf));
508	/* It does not really matter what we return, it is ignored by the kernel. */
509	return 0;
510	}
511
512	static unsigned vboxNetFltLinuxSGSegments(PVBOXNETFLTINS pThis, struct sk_buff *pBuf)
513	{
514	#ifdef VBOXNETFLT_SG_SUPPORT
515	unsigned cSegs = 1 + skb_shinfo(pBuf)->nr_frags;
516	#else
517	unsigned cSegs = 1;
518	#endif
519	#ifdef PADD_RUNT_FRAMES_FROM_HOST
520	/*
521	* Add a trailer if the frame is too small.
522	*/
523	if (pBuf->len < 60)
524	cSegs++;
525	#endif
526	return cSegs;
527	}
528
529	/* WARNING! This function should only be called after vboxNetFltLinuxSkBufToSG()! */
530	static void vboxNetFltLinuxFreeSkBuff(struct sk_buff *pBuf, PINTNETSG pSG)
531	{
532	#ifdef VBOXNETFLT_SG_SUPPORT
533	int i;
534
535	for (i = 0; i < skb_shinfo(pBuf)->nr_frags; i++)
536	{
537	printk("kunmap(%p)\n", pSG->aSegs[i+1].pv);
538	kunmap(pSG->aSegs[i+1].pv);
539	}
540	#endif
541
542	dev_kfree_skb(pBuf);
543	}
544
545	#ifndef LOG_ENABLED
546	#define vboxNetFltDumpPacket(a, b, c, d)
547	#else
548	static void vboxNetFltDumpPacket(PINTNETSG pSG, bool fEgress, const char *pszWhere, int iIncrement)
549	{
550	uint8_t pInt, pExt;
551	static int iPacketNo = 1;
552	iPacketNo += iIncrement;
553	if (fEgress)
554	{
555	pExt = pSG->aSegs[0].pv;
556	pInt = pExt + 6;
557	}
558	else
559	{
560	pInt = pSG->aSegs[0].pv;
561	pExt = pInt + 6;
562	}
563	Log(("VBoxNetFlt: (int)%02x:%02x:%02x:%02x:%02x:%02x"
564	" %s (%s)%02x:%02x:%02x:%02x:%02x:%02x (%u bytes) packet #%u\n",
565	pInt[0], pInt[1], pInt[2], pInt[3], pInt[4], pInt[5],
566	fEgress ? "-->" : "<--", pszWhere,
567	pExt[0], pExt[1], pExt[2], pExt[3], pExt[4], pExt[5],
568	pSG->cbTotal, iPacketNo));
569	Log3(("%.*Rhxd\n", pSG->aSegs[0].cb, pSG->aSegs[0].pv));
570	}
571	#endif
572
573	static int vboxNetFltLinuxForwardSegment(PVBOXNETFLTINS pThis, struct sk_buff *pBuf, uint32_t fSrc)
574	{
575	unsigned cSegs = vboxNetFltLinuxSGSegments(pThis, pBuf);
576	if (cSegs < MAX_SKB_FRAGS)
577	{
578	uint8_t *pTmp;
579	PINTNETSG pSG = (PINTNETSG)alloca(RT_OFFSETOF(INTNETSG, aSegs[cSegs]));
580	if (!pSG)
581	{
582	Log(("VBoxNetFlt: Failed to allocate SG buffer.\n"));
583	return VERR_NO_MEMORY;
584	}
585	vboxNetFltLinuxSkBufToSG(pThis, pBuf, pSG, cSegs, fSrc);
586
587	pTmp = pSG->aSegs[0].pv;
588	vboxNetFltDumpPacket(pSG, false, (fSrc & INTNETTRUNKDIR_HOST) ? "host" : "wire", 1);
589	pThis->pSwitchPort->pfnRecv(pThis->pSwitchPort, pSG, fSrc);
590	Log4(("VBoxNetFlt: Dropping the sk_buff.\n"));
591	vboxNetFltLinuxFreeSkBuff(pBuf, pSG);
592	}
593
594	return VINF_SUCCESS;
595	}
596
597	static void vboxNetFltLinuxForwardToIntNet(PVBOXNETFLTINS pThis, struct sk_buff *pBuf)
598	{
599	uint32_t fSrc = pBuf->pkt_type == PACKET_OUTGOING ? INTNETTRUNKDIR_HOST : INTNETTRUNKDIR_WIRE;
600
601	if (VBOX_SKB_IS_GSO(pBuf))
602	{
603	/* Need to segment the packet */
604	struct sk_buff pNext, pSegment;
605	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
606	Log3(("vboxNetFltLinuxForwardToIntNet: skb len=%u data_len=%u truesize=%u next=%p nr_frags=%u gso_size=%u gso_seqs=%u gso_type=%x frag_list=%p pkt_type=%x ip_summed=%d\n",
607	pBuf->len, pBuf->data_len, pBuf->truesize, pBuf->next, skb_shinfo(pBuf)->nr_frags, skb_shinfo(pBuf)->gso_size, skb_shinfo(pBuf)->gso_segs, skb_shinfo(pBuf)->gso_type, skb_shinfo(pBuf)->frag_list, pBuf->pkt_type, pBuf->ip_summed));
608	#endif
609
610	pSegment = VBOX_SKB_GSO_SEGMENT(pBuf);
611	if (IS_ERR(pSegment))
612	{
613	dev_kfree_skb(pBuf);
614	LogRel(("VBoxNetFlt: Failed to segment a packet (%d).\n", PTR_ERR(pBuf)));
615	return;
616	}
617	for (; pSegment; pSegment = pNext)
618	{
619	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
620	Log3(("vboxNetFltLinuxForwardToIntNet: segment len=%u data_len=%u truesize=%u next=%p nr_frags=%u gso_size=%u gso_seqs=%u gso_type=%x frag_list=%p pkt_type=%x\n",
621	pSegment->len, pSegment->data_len, pSegment->truesize, pSegment->next, skb_shinfo(pSegment)->nr_frags, skb_shinfo(pSegment)->gso_size, skb_shinfo(pSegment)->gso_segs, skb_shinfo(pSegment)->gso_type, skb_shinfo(pSegment)->frag_list, pSegment->pkt_type));
622	#endif
623	pNext = pSegment->next;
624	pSegment->next = 0;
625	vboxNetFltLinuxForwardSegment(pThis, pSegment, fSrc);
626	}
627	dev_kfree_skb(pBuf);
628	}
629	else
630	{
631	if (pBuf->ip_summed == CHECKSUM_PARTIAL && pBuf->pkt_type == PACKET_OUTGOING)
632	{
633	#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18)
634	/*
635	* Try to work around the problem with CentOS 4.7 and 5.2 (2.6.9
636	* and 2.6.18 kernels), they pass wrong 'h' pointer down. We take IP
637	* header length from the header itself and reconstruct 'h' pointer
638	* to TCP (or whatever) header.
639	*/
640	unsigned char *tmp = pBuf->h.raw;
641	if (pBuf->h.raw == pBuf->nh.raw && pBuf->protocol == htons(ETH_P_IP))
642	pBuf->h.raw = pBuf->nh.raw + pBuf->nh.iph->ihl * 4;
643	#endif /* LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) */
644	if (VBOX_SKB_CHECKSUM_HELP(pBuf))
645	{
646	LogRel(("VBoxNetFlt: Failed to compute checksum, dropping the packet.\n"));
647	dev_kfree_skb(pBuf);
648	return;
649	}
650	#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18)
651	/* Restore the original (wrong) pointer. */
652	pBuf->h.raw = tmp;
653	#endif /* LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) */
654	}
655	vboxNetFltLinuxForwardSegment(pThis, pBuf, fSrc);
656	}
657	/*
658	* Create a (scatter/)gather list for the sk_buff and feed it to the internal network.
659	*/
660	}
661
662	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
663	static void vboxNetFltLinuxXmitTask(struct work_struct *pWork)
664	#else
665	static void vboxNetFltLinuxXmitTask(void *pWork)
666	#endif
667	{
668	struct sk_buff *pBuf;
669	bool fActive;
670	PVBOXNETFLTINS pThis;
671	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
672
673	Log4(("vboxNetFltLinuxXmitTask: Got work %p.\n", pWork));
674	pThis = VBOX_FLT_XT_TO_INST(pWork);
675	/*
676	* Active? Retain the instance and increment the busy counter.
677	*/
678	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
679	fActive = ASMAtomicUoReadBool(&pThis->fActive);
680	if (fActive)
681	vboxNetFltRetain(pThis, true /* fBusy */);
682	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
683	if (!fActive)
684	return;
685
686	while ((pBuf = skb_dequeue(&pThis->u.s.XmitQueue)) != 0)
687	vboxNetFltLinuxForwardToIntNet(pThis, pBuf);
688
689	vboxNetFltRelease(pThis, true /* fBusy */);
690	}
691
692	/**
693	* Internal worker for vboxNetFltOsInitInstance and vboxNetFltOsMaybeRediscovered.
694	*
695	* @returns VBox status code.
696	* @param pThis The instance.
697	* @param fRediscovery If set we're doing a rediscovery attempt, so, don't
698	* flood the release log.
699	*/
700	static int vboxNetFltLinuxAttachToInterface(PVBOXNETFLTINS pThis, struct net_device *pDev)
701	{
702	struct packet_type *pt;
703	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
704
705	LogFlow(("vboxNetFltLinuxAttachToInterface: pThis=%p (%s)\n", pThis, pThis->szName));
706
707	if (!pDev)
708	{
709	Log(("VBoxNetFlt: failed to find device '%s'\n", pThis->szName));
710	return VERR_INTNET_FLT_IF_NOT_FOUND;
711	}
712
713	dev_hold(pDev);
714	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
715	ASMAtomicUoWritePtr((void * volatile *)&pThis->u.s.pDev, pDev);
716	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
717
718	Log(("vboxNetFltLinuxAttachToInterface: Device %p(%s) retained. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
719	Log(("vboxNetFltLinuxAttachToInterface: Got pDev=%p pThis=%p pThis->u.s.pDev=%p\n", pDev, pThis, ASMAtomicUoReadPtr((void * volatile *)&pThis->u.s.pDev)));
720	/*
721	* Get the mac address while we still have a valid ifnet reference.
722	*/
723	memcpy(&pThis->u.s.Mac, pDev->dev_addr, sizeof(pThis->u.s.Mac));
724
725	pt = &pThis->u.s.PacketType;
726	pt->type = __constant_htons(ETH_P_ALL);
727	pt->dev = pDev;
728	pt->func = vboxNetFltLinuxPacketHandler;
729	dev_add_pack(pt);
730	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
731	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
732	if (pDev)
733	{
734	ASMAtomicUoWriteBool(&pThis->fDisconnectedFromHost, false);
735	ASMAtomicUoWriteBool(&pThis->u.s.fRegistered, true);
736	pDev = NULL; /* don't dereference it */
737	}
738	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
739	Log(("vboxNetFltLinuxAttachToInterface: this=%p: Packet handler installed.\n", pThis));
740
741	/* Release the interface on failure. */
742	if (pDev)
743	{
744	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
745	ASMAtomicUoWritePtr((void * volatile *)&pThis->u.s.pDev, NULL);
746	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
747	dev_put(pDev);
748	Log(("vboxNetFltLinuxAttachToInterface: Device %p(%s) released. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
749	}
750
751	LogRel(("VBoxNetFlt: attached to '%s' / %.*Rhxs\n", pThis->szName, sizeof(pThis->u.s.Mac), &pThis->u.s.Mac));
752	return VINF_SUCCESS;
753	}
754
755
756	static int vboxNetFltLinuxUnregisterDevice(PVBOXNETFLTINS pThis, struct net_device *pDev)
757	{
758	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
759
760	Assert(!pThis->fDisconnectedFromHost);
761	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
762	ASMAtomicWriteBool(&pThis->u.s.fRegistered, false);
763	ASMAtomicWriteBool(&pThis->fDisconnectedFromHost, true);
764	ASMAtomicUoWritePtr((void * volatile *)&pThis->u.s.pDev, NULL);
765	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
766
767	dev_remove_pack(&pThis->u.s.PacketType);
768	skb_queue_purge(&pThis->u.s.XmitQueue);
769	Log(("vboxNetFltLinuxUnregisterDevice: this=%p: Packet handler removed, xmit queue purged.\n", pThis));
770	Log(("vboxNetFltLinuxUnregisterDevice: Device %p(%s) released. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
771	dev_put(pDev);
772
773	return NOTIFY_OK;
774	}
775
776	static int vboxNetFltLinuxDeviceIsUp(PVBOXNETFLTINS pThis, struct net_device *pDev)
777	{
778	/* Check if we are not suspended and promiscuous mode has not been set. */
779	if (ASMAtomicUoReadBool(&pThis->fActive) && !ASMAtomicUoReadBool(&pThis->u.s.fPromiscuousSet))
780	{
781	/* Note that there is no need for locking as the kernel got hold of the lock already. */
782	dev_set_promiscuity(pDev, 1);
783	ASMAtomicWriteBool(&pThis->u.s.fPromiscuousSet, true);
784	Log(("vboxNetFltLinuxDeviceIsUp: enabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
785	}
786	else
787	Log(("vboxNetFltLinuxDeviceIsUp: no need to enable promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
788	return NOTIFY_OK;
789	}
790
791	static int vboxNetFltLinuxDeviceGoingDown(PVBOXNETFLTINS pThis, struct net_device *pDev)
792	{
793	/* Undo promiscuous mode if we has set it. */
794	if (ASMAtomicUoReadBool(&pThis->u.s.fPromiscuousSet))
795	{
796	/* Note that there is no need for locking as the kernel got hold of the lock already. */
797	dev_set_promiscuity(pDev, -1);
798	ASMAtomicWriteBool(&pThis->u.s.fPromiscuousSet, false);
799	Log(("vboxNetFltLinuxDeviceGoingDown: disabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
800	}
801	else
802	Log(("vboxNetFltLinuxDeviceGoingDown: no need to disable promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
803	return NOTIFY_OK;
804	}
805
806	static int vboxNetFltLinuxNotifierCallback(struct notifier_block self, unsigned long ulEventType, void ptr)
807
808	{
809	int rc = NOTIFY_OK;
810	#ifdef DEBUG
811	char *pszEvent = "<unknown>";
812	#endif
813	struct net_device pDev = (struct net_device )ptr;
814	PVBOXNETFLTINS pThis = VBOX_FLT_NB_TO_INST(self);
815
816	#ifdef DEBUG
817	switch (ulEventType)
818	{
819	case NETDEV_REGISTER: pszEvent = "NETDEV_REGISTER"; break;
820	case NETDEV_UNREGISTER: pszEvent = "NETDEV_UNREGISTER"; break;
821	case NETDEV_UP: pszEvent = "NETDEV_UP"; break;
822	case NETDEV_DOWN: pszEvent = "NETDEV_DOWN"; break;
823	case NETDEV_REBOOT: pszEvent = "NETDEV_REBOOT"; break;
824	case NETDEV_CHANGENAME: pszEvent = "NETDEV_CHANGENAME"; break;
825	case NETDEV_CHANGE: pszEvent = "NETDEV_CHANGE"; break;
826	case NETDEV_CHANGEMTU: pszEvent = "NETDEV_CHANGEMTU"; break;
827	case NETDEV_CHANGEADDR: pszEvent = "NETDEV_CHANGEADDR"; break;
828	case NETDEV_GOING_DOWN: pszEvent = "NETDEV_GOING_DOWN"; break;
829	}
830	Log(("VBoxNetFlt: got event %s(0x%lx) on %s, pDev=%p pThis=%p pThis->u.s.pDev=%p\n",
831	pszEvent, ulEventType, pDev->name, pDev, pThis, ASMAtomicUoReadPtr((void * volatile *)&pThis->u.s.pDev)));
832	#endif
833	if (ulEventType == NETDEV_REGISTER && !strcmp(pDev->name, pThis->szName))
834	{
835	vboxNetFltLinuxAttachToInterface(pThis, pDev);
836	}
837	else
838	{
839	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
840	if (pDev != ptr)
841	return NOTIFY_OK;
842	rc = NOTIFY_OK;
843	switch (ulEventType)
844	{
845	case NETDEV_UNREGISTER:
846	rc = vboxNetFltLinuxUnregisterDevice(pThis, pDev);
847	break;
848	case NETDEV_UP:
849	rc = vboxNetFltLinuxDeviceIsUp(pThis, pDev);
850	break;
851	case NETDEV_GOING_DOWN:
852	rc = vboxNetFltLinuxDeviceGoingDown(pThis, pDev);
853	break;
854	case NETDEV_CHANGENAME:
855	break;
856	}
857	}
858
859	return rc;
860	}
861
862	bool vboxNetFltOsMaybeRediscovered(PVBOXNETFLTINS pThis)
863	{
864	return !ASMAtomicUoReadBool(&pThis->fDisconnectedFromHost);
865	}
866
867	int vboxNetFltPortOsXmit(PVBOXNETFLTINS pThis, PINTNETSG pSG, uint32_t fDst)
868	{
869	struct net_device * pDev;
870	int err;
871	int rc = VINF_SUCCESS;
872
873	LogFlow(("vboxNetFltPortOsXmit: pThis=%p (%s)\n", pThis, pThis->szName));
874
875	pDev = vboxNetFltLinuxRetainNetDev(pThis);
876	if (pDev)
877	{
878	/*
879	* Create a sk_buff for the gather list and push it onto the wire.
880	*/
881	if (fDst & INTNETTRUNKDIR_WIRE)
882	{
883	struct sk_buff *pBuf = vboxNetFltLinuxSkBufFromSG(pThis, pSG, true);
884	if (pBuf)
885	{
886	vboxNetFltDumpPacket(pSG, true, "wire", 1);
887	Log4(("vboxNetFltPortOsXmit: pBuf->cb dump:\n%.*Rhxd\n", sizeof(pBuf->cb), pBuf->cb));
888	Log4(("vboxNetFltPortOsXmit: dev_queue_xmit(%p)\n", pBuf));
889	err = dev_queue_xmit(pBuf);
890	if (err)
891	rc = RTErrConvertFromErrno(err);
892	}
893	else
894	rc = VERR_NO_MEMORY;
895	}
896
897	/*
898	* Create a sk_buff for the gather list and push it onto the host stack.
899	*/
900	if (fDst & INTNETTRUNKDIR_HOST)
901	{
902	struct sk_buff *pBuf = vboxNetFltLinuxSkBufFromSG(pThis, pSG, false);
903	if (pBuf)
904	{
905	vboxNetFltDumpPacket(pSG, true, "host", (fDst & INTNETTRUNKDIR_WIRE) ? 0 : 1);
906	Log4(("vboxNetFltPortOsXmit: pBuf->cb dump:\n%.*Rhxd\n", sizeof(pBuf->cb), pBuf->cb));
907	Log4(("vboxNetFltPortOsXmit: netif_rx_ni(%p)\n", pBuf));
908	err = netif_rx_ni(pBuf);
909	if (err)
910	rc = RTErrConvertFromErrno(err);
911	}
912	else
913	rc = VERR_NO_MEMORY;
914	}
915
916	vboxNetFltLinuxReleaseNetDev(pThis, pDev);
917	}
918
919	return rc;
920	}
921
922
923	bool vboxNetFltPortOsIsPromiscuous(PVBOXNETFLTINS pThis)
924	{
925	bool fRc = false;
926	struct net_device * pDev = vboxNetFltLinuxRetainNetDev(pThis);
927	if (pDev)
928	{
929	fRc = !!(pDev->promiscuity - (ASMAtomicUoReadBool(&pThis->u.s.fPromiscuousSet) & 1));
930	LogFlow(("vboxNetFltPortOsIsPromiscuous: returns %d, pDev->promiscuity=%d, fPromiscuousSet=%d\n",
931	fRc, pDev->promiscuity, pThis->u.s.fPromiscuousSet));
932	vboxNetFltLinuxReleaseNetDev(pThis, pDev);
933	}
934	return fRc;
935	}
936
937
938	void vboxNetFltPortOsGetMacAddress(PVBOXNETFLTINS pThis, PRTMAC pMac)
939	{
940	*pMac = pThis->u.s.Mac;
941	}
942
943
944	bool vboxNetFltPortOsIsHostMac(PVBOXNETFLTINS pThis, PCRTMAC pMac)
945	{
946	/* ASSUMES that the MAC address never changes. */
947	return pThis->u.s.Mac.au16[0] == pMac->au16[0]
948	&& pThis->u.s.Mac.au16[1] == pMac->au16[1]
949	&& pThis->u.s.Mac.au16[2] == pMac->au16[2];
950	}
951
952
953	void vboxNetFltPortOsSetActive(PVBOXNETFLTINS pThis, bool fActive)
954	{
955	struct net_device * pDev;
956
957	LogFlow(("vboxNetFltPortOsSetActive: pThis=%p (%s), fActive=%s, fDisablePromiscuous=%s\n",
958	pThis, pThis->szName, fActive?"true":"false",
959	pThis->fDisablePromiscuous?"true":"false"));
960
961	if (pThis->fDisablePromiscuous)
962	return;
963
964	pDev = vboxNetFltLinuxRetainNetDev(pThis);
965	if (pDev)
966	{
967	/*
968	* This api is a bit weird, the best reference is the code.
969	*
970	* Also, we have a bit or race conditions wrt the maintance of
971	* host the interface promiscuity for vboxNetFltPortOsIsPromiscuous.
972	*/
973	#ifdef LOG_ENABLED
974	u_int16_t fIf;
975	unsigned const cPromiscBefore = VBOX_GET_PCOUNT(pDev);
976	#endif
977	if (fActive)
978	{
979	Assert(!pThis->u.s.fPromiscuousSet);
980
981	rtnl_lock();
982	dev_set_promiscuity(pDev, 1);
983	rtnl_unlock();
984	pThis->u.s.fPromiscuousSet = true;
985	Log(("vboxNetFltPortOsSetActive: enabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
986	}
987	else
988	{
989	if (pThis->u.s.fPromiscuousSet)
990	{
991	rtnl_lock();
992	dev_set_promiscuity(pDev, -1);
993	rtnl_unlock();
994	Log(("vboxNetFltPortOsSetActive: disabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
995	}
996	pThis->u.s.fPromiscuousSet = false;
997
998	#ifdef LOG_ENABLED
999	fIf = dev_get_flags(pDev);
1000	Log(("VBoxNetFlt: fIf=%#x; %d->%d\n", fIf, cPromiscBefore, VBOX_GET_PCOUNT(pDev)));
1001	#endif
1002	}
1003
1004	vboxNetFltLinuxReleaseNetDev(pThis, pDev);
1005	}
1006	}
1007
1008
1009	int vboxNetFltOsDisconnectIt(PVBOXNETFLTINS pThis)
1010	{
1011	/* Nothing to do here. */
1012	return VINF_SUCCESS;
1013	}
1014
1015
1016	int vboxNetFltOsConnectIt(PVBOXNETFLTINS pThis)
1017	{
1018	/* Nothing to do here. */
1019	return VINF_SUCCESS;
1020	}
1021
1022
1023	void vboxNetFltOsDeleteInstance(PVBOXNETFLTINS pThis)
1024	{
1025	struct net_device *pDev;
1026	bool fRegistered;
1027	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
1028
1029	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
1030	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
1031	fRegistered = ASMAtomicUoReadBool(&pThis->u.s.fRegistered);
1032	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
1033	if (fRegistered)
1034	{
1035	dev_remove_pack(&pThis->u.s.PacketType);
1036	skb_queue_purge(&pThis->u.s.XmitQueue);
1037	Log(("vboxNetFltOsDeleteInstance: this=%p: Packet handler removed, xmit queue purged.\n", pThis));
1038	Log(("vboxNetFltOsDeleteInstance: Device %p(%s) released. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
1039	dev_put(pDev);
1040	}
1041	Log(("vboxNetFltOsDeleteInstance: this=%p: Notifier removed.\n", pThis));
1042	unregister_netdevice_notifier(&pThis->u.s.Notifier);
1043	module_put(THIS_MODULE);
1044	}
1045
1046
1047	int vboxNetFltOsInitInstance(PVBOXNETFLTINS pThis, void *pvContext)
1048	{
1049	int err;
1050	NOREF(pvContext);
1051
1052	pThis->u.s.Notifier.notifier_call = vboxNetFltLinuxNotifierCallback;
1053	err = register_netdevice_notifier(&pThis->u.s.Notifier);
1054	if (err)
1055	return VERR_INTNET_FLT_IF_FAILED;
1056	if (!pThis->u.s.fRegistered)
1057	{
1058	unregister_netdevice_notifier(&pThis->u.s.Notifier);
1059	LogRel(("VBoxNetFlt: failed to find %s.\n", pThis->szName));
1060	return VERR_INTNET_FLT_IF_NOT_FOUND;
1061	}
1062
1063	Log(("vboxNetFltOsInitInstance: this=%p: Notifier installed.\n", pThis));
1064	if ( pThis->fDisconnectedFromHost
1065	\|\| !try_module_get(THIS_MODULE))
1066	return VERR_INTNET_FLT_IF_FAILED;
1067
1068	return VINF_SUCCESS;
1069	}
1070
1071	int vboxNetFltOsPreInitInstance(PVBOXNETFLTINS pThis)
1072	{
1073	/*
1074	* Init the linux specific members.
1075	*/
1076	pThis->u.s.pDev = NULL;
1077	pThis->u.s.fRegistered = false;
1078	pThis->u.s.fPromiscuousSet = false;
1079	memset(&pThis->u.s.PacketType, 0, sizeof(pThis->u.s.PacketType));
1080	skb_queue_head_init(&pThis->u.s.XmitQueue);
1081	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
1082	INIT_WORK(&pThis->u.s.XmitTask, vboxNetFltLinuxXmitTask);
1083	#else
1084	INIT_WORK(&pThis->u.s.XmitTask, vboxNetFltLinuxXmitTask, &pThis->u.s.XmitTask);
1085	#endif
1086
1087	return VINF_SUCCESS;
1088	}
1089

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source: vbox/trunk/src/VBox/HostDrivers/VBoxNetFlt/linux/VBoxNetFlt-linux.c@ 26943

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