VBoxNetFlt-linux.c@ 21351

Last change on this file since 21351 was 21351, checked in by vboxsync, 16 years ago
HstDrv: Made vboxnetadp and vboxnetflt use IPRT from vboxdrv.
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 21351 2009-07-07 15:56:04Z 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	# define xstr(s) str(s)
137	# define str(s) #s
138	MODULE_VERSION(VBOX_VERSION_STRING " (" xstr(INTNETTRUNKIFPORT_VERSION) ")");
139	#endif
140
141
142	/**
143	* Initialize module.
144	*
145	* @returns appropriate status code.
146	*/
147	static int __init VBoxNetFltLinuxInit(void)
148	{
149	int rc;
150	/*
151	* Initialize IPRT.
152	*/
153	rc = RTR0Init(0);
154	if (RT_SUCCESS(rc))
155	{
156	Log(("VBoxNetFltLinuxInit\n"));
157
158	/*
159	* Initialize the globals and connect to the support driver.
160	*
161	* This will call back vboxNetFltOsOpenSupDrv (and maybe vboxNetFltOsCloseSupDrv)
162	* for establishing the connect to the support driver.
163	*/
164	memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
165	rc = vboxNetFltInitGlobalsAndIdc(&g_VBoxNetFltGlobals);
166	if (RT_SUCCESS(rc))
167	{
168	LogRel(("VBoxNetFlt: Successfully started.\n"));
169	return 0;
170	}
171
172	LogRel(("VBoxNetFlt: failed to initialize device extension (rc=%d)\n", rc));
173	RTR0Term();
174	}
175	else
176	LogRel(("VBoxNetFlt: failed to initialize IPRT (rc=%d)\n", rc));
177
178	memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
179	return -RTErrConvertToErrno(rc);
180	}
181
182
183	/**
184	* Unload the module.
185	*
186	* @todo We have to prevent this if we're busy!
187	*/
188	static void __exit VBoxNetFltLinuxUnload(void)
189	{
190	int rc;
191	Log(("VBoxNetFltLinuxUnload\n"));
192	Assert(vboxNetFltCanUnload(&g_VBoxNetFltGlobals));
193
194	/*
195	* Undo the work done during start (in reverse order).
196	*/
197	rc = vboxNetFltTryDeleteIdcAndGlobals(&g_VBoxNetFltGlobals);
198	AssertRC(rc); NOREF(rc);
199
200	RTR0Term();
201
202	memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
203
204	Log(("VBoxNetFltLinuxUnload - done\n"));
205	}
206
207
208	/**
209	* Reads and retains the host interface handle.
210	*
211	* @returns The handle, NULL if detached.
212	* @param pThis
213	*/
214	DECLINLINE(struct net_device *) vboxNetFltLinuxRetainNetDev(PVBOXNETFLTINS pThis)
215	{
216	#if 0
217	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
218	struct net_device *pDev = NULL;
219
220	Log(("vboxNetFltLinuxRetainNetDev\n"));
221	/*
222	* Be careful here to avoid problems racing the detached callback.
223	*/
224	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
225	if (!ASMAtomicUoReadBool(&pThis->fDisconnectedFromHost))
226	{
227	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
228	if (pDev)
229	{
230	dev_hold(pDev);
231	Log(("vboxNetFltLinuxRetainNetDev: Device %p(%s) retained. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
232	}
233	}
234	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
235
236	Log(("vboxNetFltLinuxRetainNetDev - done\n"));
237	return pDev;
238	#else
239	return (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
240	#endif
241	}
242
243
244	/**
245	* Release the host interface handle previously retained
246	* by vboxNetFltLinuxRetainNetDev.
247	*
248	* @param pThis The instance.
249	* @param pDev The vboxNetFltLinuxRetainNetDev
250	* return value, NULL is fine.
251	*/
252	DECLINLINE(void) vboxNetFltLinuxReleaseNetDev(PVBOXNETFLTINS pThis, struct net_device *pDev)
253	{
254	#if 0
255	Log(("vboxNetFltLinuxReleaseNetDev\n"));
256	NOREF(pThis);
257	if (pDev)
258	{
259	dev_put(pDev);
260	Log(("vboxNetFltLinuxReleaseNetDev: Device %p(%s) released. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
261	}
262	Log(("vboxNetFltLinuxReleaseNetDev - done\n"));
263	#endif
264	}
265
266	#define VBOXNETFLT_CB_TAG(skb) (0xA1C90000 \| (skb->dev->ifindex & 0xFFFF))
267	#define VBOXNETFLT_SKB_TAG(skb) ((uint32_t)&((skb)->cb[sizeof((skb)->cb)-sizeof(uint32_t)]))
268
269	/**
270	* Checks whether this is an mbuf created by vboxNetFltLinuxMBufFromSG,
271	* i.e. a buffer which we're pushing and should be ignored by the filter callbacks.
272	*
273	* @returns true / false accordingly.
274	* @param pBuf The sk_buff.
275	*/
276	DECLINLINE(bool) vboxNetFltLinuxSkBufIsOur(struct sk_buff *pBuf)
277	{
278	return VBOXNETFLT_SKB_TAG(pBuf) == VBOXNETFLT_CB_TAG(pBuf);
279	}
280
281
282	/**
283	* Internal worker that create a linux sk_buff for a
284	* (scatter/)gather list.
285	*
286	* @returns Pointer to the sk_buff.
287	* @param pThis The instance.
288	* @param pSG The (scatter/)gather list.
289	*/
290	static struct sk_buff *vboxNetFltLinuxSkBufFromSG(PVBOXNETFLTINS pThis, PINTNETSG pSG, bool fDstWire)
291	{
292	struct sk_buff *pPkt;
293	struct net_device *pDev;
294	/*
295	* Because we're lazy, we will ASSUME that all SGs coming from INTNET
296	* will only contain one single segment.
297	*/
298	if (pSG->cSegsUsed != 1 \|\| pSG->cbTotal != pSG->aSegs[0].cb)
299	{
300	LogRel(("VBoxNetFlt: Dropped multi-segment(%d) packet coming from internal network.\n", pSG->cSegsUsed));
301	return NULL;
302	}
303	if (pSG->cbTotal == 0)
304	{
305	LogRel(("VBoxNetFlt: Dropped empty packet coming from internal network.\n"));
306	return NULL;
307	}
308
309	/*
310	* Allocate a packet and copy over the data.
311	*
312	*/
313	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
314	pPkt = dev_alloc_skb(pSG->cbTotal + NET_IP_ALIGN);
315	if (pPkt)
316	{
317	pPkt->dev = pDev;
318	/* Align IP header on 16-byte boundary: 2 + 14 (ethernet hdr size). */
319	skb_reserve(pPkt, NET_IP_ALIGN);
320	skb_put(pPkt, pSG->cbTotal);
321	memcpy(pPkt->data, pSG->aSegs[0].pv, pSG->cbTotal);
322	/* Set protocol and packet_type fields. */
323	pPkt->protocol = eth_type_trans(pPkt, pDev);
324	pPkt->ip_summed = CHECKSUM_NONE;
325	if (fDstWire)
326	{
327	VBOX_SKB_RESET_NETWORK_HDR(pPkt);
328	/* Restore ethernet header back. */
329	skb_push(pPkt, ETH_HLEN);
330	VBOX_SKB_RESET_MAC_HDR(pPkt);
331	}
332	VBOXNETFLT_SKB_TAG(pPkt) = VBOXNETFLT_CB_TAG(pPkt);
333
334	return pPkt;
335	}
336	else
337	Log(("vboxNetFltLinuxSkBufFromSG: Failed to allocate sk_buff(%u).\n", pSG->cbTotal));
338	pSG->pvUserData = NULL;
339
340	return NULL;
341	}
342
343
344	/**
345	* Initializes a SG list from an sk_buff.
346	*
347	* @returns Number of segments.
348	* @param pThis The instance.
349	* @param pBuf The sk_buff.
350	* @param pSG The SG.
351	* @param pvFrame The frame pointer, optional.
352	* @param cSegs The number of segments allocated for the SG.
353	* This should match the number in the mbuf exactly!
354	* @param fSrc The source of the frame.
355	*/
356	DECLINLINE(void) vboxNetFltLinuxSkBufToSG(PVBOXNETFLTINS pThis, struct sk_buff *pBuf, PINTNETSG pSG, unsigned cSegs, uint32_t fSrc)
357	{
358	int i;
359	NOREF(pThis);
360
361	Assert(!skb_shinfo(pBuf)->frag_list);
362	pSG->pvOwnerData = NULL;
363	pSG->pvUserData = NULL;
364	pSG->pvUserData2 = NULL;
365	pSG->cUsers = 1;
366	pSG->fFlags = INTNETSG_FLAGS_TEMP;
367	pSG->cSegsAlloc = cSegs;
368
369	if (fSrc & INTNETTRUNKDIR_WIRE)
370	{
371	/*
372	* The packet came from wire, ethernet header was removed by device driver.
373	* Restore it.
374	*/
375	skb_push(pBuf, ETH_HLEN);
376	}
377	pSG->cbTotal = pBuf->len;
378	#ifdef VBOXNETFLT_SG_SUPPORT
379	pSG->aSegs[0].cb = skb_headlen(pBuf);
380	pSG->aSegs[0].pv = pBuf->data;
381	pSG->aSegs[0].Phys = NIL_RTHCPHYS;
382
383	for (i = 0; i < skb_shinfo(pBuf)->nr_frags; i++)
384	{
385	skb_frag_t *pFrag = &skb_shinfo(pBuf)->frags[i];
386	pSG->aSegs[i+1].cb = pFrag->size;
387	pSG->aSegs[i+1].pv = kmap(pFrag->page);
388	printk("%p = kmap()\n", pSG->aSegs[i+1].pv);
389	pSG->aSegs[i+1].Phys = NIL_RTHCPHYS;
390	}
391	pSG->cSegsUsed = ++i;
392	#else
393	pSG->aSegs[0].cb = pBuf->len;
394	pSG->aSegs[0].pv = pBuf->data;
395	pSG->aSegs[0].Phys = NIL_RTHCPHYS;
396	pSG->cSegsUsed = i = 1;
397	#endif
398
399
400	#ifdef PADD_RUNT_FRAMES_FROM_HOST
401	/*
402	* Add a trailer if the frame is too small.
403	*
404	* Since we're getting to the packet before it is framed, it has not
405	* yet been padded. The current solution is to add a segment pointing
406	* to a buffer containing all zeros and pray that works for all frames...
407	*/
408	if (pSG->cbTotal < 60 && (fSrc & INTNETTRUNKDIR_HOST))
409	{
410	static uint8_t const s_abZero[128] = {0};
411
412	AssertReturnVoid(i < cSegs);
413
414	pSG->aSegs[i].Phys = NIL_RTHCPHYS;
415	pSG->aSegs[i].pv = (void *)&s_abZero[0];
416	pSG->aSegs[i].cb = 60 - pSG->cbTotal;
417	pSG->cbTotal = 60;
418	pSG->cSegsUsed++;
419	}
420	#endif
421	Log4(("vboxNetFltLinuxSkBufToSG: allocated=%d, segments=%d frags=%d next=%p frag_list=%p pkt_type=%x fSrc=%x\n",
422	pSG->cSegsAlloc, pSG->cSegsUsed, skb_shinfo(pBuf)->nr_frags, pBuf->next, skb_shinfo(pBuf)->frag_list, pBuf->pkt_type, fSrc));
423	for (i = 0; i < pSG->cSegsUsed; i++)
424	Log4(("vboxNetFltLinuxSkBufToSG: #%d: cb=%d pv=%p\n",
425	i, pSG->aSegs[i].cb, pSG->aSegs[i].pv));
426	}
427
428	/**
429	* Packet handler,
430	*
431	* @returns 0 or EJUSTRETURN.
432	* @param pThis The instance.
433	* @param pMBuf The mbuf.
434	* @param pvFrame The start of the frame, optional.
435	* @param fSrc Where the packet (allegedly) comes from, one INTNETTRUNKDIR_* value.
436	* @param eProtocol The protocol.
437	*/
438	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 14)
439	static int vboxNetFltLinuxPacketHandler(struct sk_buff *pBuf,
440	struct net_device *pSkbDev,
441	struct packet_type *pPacketType,
442	struct net_device *pOrigDev)
443	#else
444	static int vboxNetFltLinuxPacketHandler(struct sk_buff *pBuf,
445	struct net_device *pSkbDev,
446	struct packet_type *pPacketType)
447	#endif
448	{
449	PVBOXNETFLTINS pThis;
450	struct net_device *pDev;
451	LogFlow(("vboxNetFltLinuxPacketHandler: pBuf=%p pSkbDev=%p pPacketType=%p\n",
452	pBuf, pSkbDev, pPacketType));
453	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
454	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",
455	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));
456	#else
457	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",
458	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));
459	#endif
460	/*
461	* Drop it immediately?
462	*/
463	if (!pBuf)
464	return 0;
465
466	pThis = VBOX_FLT_PT_TO_INST(pPacketType);
467	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
468	if (pThis->u.s.pDev != pSkbDev)
469	{
470	Log(("vboxNetFltLinuxPacketHandler: Devices do not match, pThis may be wrong! pThis=%p\n", pThis));
471	return 0;
472	}
473
474	Log4(("vboxNetFltLinuxPacketHandler: pBuf->cb dump:\n%.*Rhxd\n", sizeof(pBuf->cb), pBuf->cb));
475	if (vboxNetFltLinuxSkBufIsOur(pBuf))
476	{
477	Log2(("vboxNetFltLinuxPacketHandler: got our own sk_buff, drop it.\n"));
478	dev_kfree_skb(pBuf);
479	return 0;
480	}
481
482	#ifndef VBOXNETFLT_SG_SUPPORT
483	{
484	/*
485	* Get rid of fragmented packets, they cause too much trouble.
486	*/
487	struct sk_buff *pCopy = skb_copy(pBuf, GFP_ATOMIC);
488	kfree_skb(pBuf);
489	if (!pCopy)
490	{
491	LogRel(("VBoxNetFlt: Failed to allocate packet buffer, dropping the packet.\n"));
492	return 0;
493	}
494	pBuf = pCopy;
495	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
496	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",
497	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));
498	#else
499	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",
500	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));
501	#endif
502	}
503	#endif
504
505	/* Add the packet to transmit queue and schedule the bottom half. */
506	skb_queue_tail(&pThis->u.s.XmitQueue, pBuf);
507	schedule_work(&pThis->u.s.XmitTask);
508	Log4(("vboxNetFltLinuxPacketHandler: scheduled work %p for sk_buff %p\n",
509	&pThis->u.s.XmitTask, pBuf));
510	/* It does not really matter what we return, it is ignored by the kernel. */
511	return 0;
512	}
513
514	static unsigned vboxNetFltLinuxSGSegments(PVBOXNETFLTINS pThis, struct sk_buff *pBuf)
515	{
516	#ifdef VBOXNETFLT_SG_SUPPORT
517	unsigned cSegs = 1 + skb_shinfo(pBuf)->nr_frags;
518	#else
519	unsigned cSegs = 1;
520	#endif
521	#ifdef PADD_RUNT_FRAMES_FROM_HOST
522	/*
523	* Add a trailer if the frame is too small.
524	*/
525	if (pBuf->len < 60)
526	cSegs++;
527	#endif
528	return cSegs;
529	}
530
531	/* WARNING! This function should only be called after vboxNetFltLinuxSkBufToSG()! */
532	static void vboxNetFltLinuxFreeSkBuff(struct sk_buff *pBuf, PINTNETSG pSG)
533	{
534	#ifdef VBOXNETFLT_SG_SUPPORT
535	int i;
536
537	for (i = 0; i < skb_shinfo(pBuf)->nr_frags; i++)
538	{
539	printk("kunmap(%p)\n", pSG->aSegs[i+1].pv);
540	kunmap(pSG->aSegs[i+1].pv);
541	}
542	#endif
543
544	dev_kfree_skb(pBuf);
545	}
546
547	#ifndef LOG_ENABLED
548	#define vboxNetFltDumpPacket(a, b, c, d)
549	#else
550	static void vboxNetFltDumpPacket(PINTNETSG pSG, bool fEgress, const char *pszWhere, int iIncrement)
551	{
552	uint8_t pInt, pExt;
553	static int iPacketNo = 1;
554	iPacketNo += iIncrement;
555	if (fEgress)
556	{
557	pExt = pSG->aSegs[0].pv;
558	pInt = pExt + 6;
559	}
560	else
561	{
562	pInt = pSG->aSegs[0].pv;
563	pExt = pInt + 6;
564	}
565	Log(("VBoxNetFlt: (int)%02x:%02x:%02x:%02x:%02x:%02x"
566	" %s (%s)%02x:%02x:%02x:%02x:%02x:%02x (%u bytes) packet #%u\n",
567	pInt[0], pInt[1], pInt[2], pInt[3], pInt[4], pInt[5],
568	fEgress ? "-->" : "<--", pszWhere,
569	pExt[0], pExt[1], pExt[2], pExt[3], pExt[4], pExt[5],
570	pSG->cbTotal, iPacketNo));
571	Log3(("%.*Rhxd\n", pSG->aSegs[0].cb, pSG->aSegs[0].pv));
572	}
573	#endif
574
575	static int vboxNetFltLinuxForwardSegment(PVBOXNETFLTINS pThis, struct sk_buff *pBuf, uint32_t fSrc)
576	{
577	unsigned cSegs = vboxNetFltLinuxSGSegments(pThis, pBuf);
578	if (cSegs < MAX_SKB_FRAGS)
579	{
580	uint8_t *pTmp;
581	PINTNETSG pSG = (PINTNETSG)alloca(RT_OFFSETOF(INTNETSG, aSegs[cSegs]));
582	if (!pSG)
583	{
584	Log(("VBoxNetFlt: Failed to allocate SG buffer.\n"));
585	return VERR_NO_MEMORY;
586	}
587	vboxNetFltLinuxSkBufToSG(pThis, pBuf, pSG, cSegs, fSrc);
588
589	pTmp = pSG->aSegs[0].pv;
590	vboxNetFltDumpPacket(pSG, false, (fSrc & INTNETTRUNKDIR_HOST) ? "host" : "wire", 1);
591	pThis->pSwitchPort->pfnRecv(pThis->pSwitchPort, pSG, fSrc);
592	Log4(("VBoxNetFlt: Dropping the sk_buff.\n"));
593	vboxNetFltLinuxFreeSkBuff(pBuf, pSG);
594	}
595
596	return VINF_SUCCESS;
597	}
598
599	static void vboxNetFltLinuxForwardToIntNet(PVBOXNETFLTINS pThis, struct sk_buff *pBuf)
600	{
601	uint32_t fSrc = pBuf->pkt_type == PACKET_OUTGOING ? INTNETTRUNKDIR_HOST : INTNETTRUNKDIR_WIRE;
602
603	if (VBOX_SKB_IS_GSO(pBuf))
604	{
605	/* Need to segment the packet */
606	struct sk_buff pNext, pSegment;
607	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
608	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",
609	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));
610	#endif
611
612	pSegment = VBOX_SKB_GSO_SEGMENT(pBuf);
613	if (IS_ERR(pSegment))
614	{
615	dev_kfree_skb(pBuf);
616	LogRel(("VBoxNetFlt: Failed to segment a packet (%d).\n", PTR_ERR(pBuf)));
617	return;
618	}
619	for (; pSegment; pSegment = pNext)
620	{
621	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
622	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",
623	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));
624	#endif
625	pNext = pSegment->next;
626	pSegment->next = 0;
627	vboxNetFltLinuxForwardSegment(pThis, pSegment, fSrc);
628	}
629	dev_kfree_skb(pBuf);
630	}
631	else
632	{
633	if (pBuf->ip_summed == CHECKSUM_PARTIAL && pBuf->pkt_type == PACKET_OUTGOING)
634	{
635	#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18)
636	/*
637	* Try to work around the problem with CentOS 4.7 and 5.2 (2.6.9
638	* and 2.6.18 kernels), they pass wrong 'h' pointer down. We take IP
639	* header length from the header itself and reconstruct 'h' pointer
640	* to TCP (or whatever) header.
641	*/
642	unsigned char *tmp = pBuf->h.raw;
643	if (pBuf->h.raw == pBuf->nh.raw && pBuf->protocol == htons(ETH_P_IP))
644	pBuf->h.raw = pBuf->nh.raw + pBuf->nh.iph->ihl * 4;
645	#endif /* LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) */
646	if (VBOX_SKB_CHECKSUM_HELP(pBuf))
647	{
648	LogRel(("VBoxNetFlt: Failed to compute checksum, dropping the packet.\n"));
649	dev_kfree_skb(pBuf);
650	return;
651	}
652	#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18)
653	/* Restore the original (wrong) pointer. */
654	pBuf->h.raw = tmp;
655	#endif /* LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) */
656	}
657	vboxNetFltLinuxForwardSegment(pThis, pBuf, fSrc);
658	}
659	/*
660	* Create a (scatter/)gather list for the sk_buff and feed it to the internal network.
661	*/
662	}
663
664	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
665	static void vboxNetFltLinuxXmitTask(struct work_struct *pWork)
666	#else
667	static void vboxNetFltLinuxXmitTask(void *pWork)
668	#endif
669	{
670	struct sk_buff *pBuf;
671	bool fActive;
672	PVBOXNETFLTINS pThis;
673	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
674
675	Log4(("vboxNetFltLinuxXmitTask: Got work %p.\n", pWork));
676	pThis = VBOX_FLT_XT_TO_INST(pWork);
677	/*
678	* Active? Retain the instance and increment the busy counter.
679	*/
680	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
681	fActive = ASMAtomicUoReadBool(&pThis->fActive);
682	if (fActive)
683	vboxNetFltRetain(pThis, true /* fBusy */);
684	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
685	if (!fActive)
686	return;
687
688	while ((pBuf = skb_dequeue(&pThis->u.s.XmitQueue)) != 0)
689	vboxNetFltLinuxForwardToIntNet(pThis, pBuf);
690
691	vboxNetFltRelease(pThis, true /* fBusy */);
692	}
693
694	/**
695	* Internal worker for vboxNetFltOsInitInstance and vboxNetFltOsMaybeRediscovered.
696	*
697	* @returns VBox status code.
698	* @param pThis The instance.
699	* @param fRediscovery If set we're doing a rediscovery attempt, so, don't
700	* flood the release log.
701	*/
702	static int vboxNetFltLinuxAttachToInterface(PVBOXNETFLTINS pThis, struct net_device *pDev)
703	{
704	struct packet_type *pt;
705	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
706
707	LogFlow(("vboxNetFltLinuxAttachToInterface: pThis=%p (%s)\n", pThis, pThis->szName));
708
709	if (!pDev)
710	{
711	Log(("VBoxNetFlt: failed to find device '%s'\n", pThis->szName));
712	return VERR_INTNET_FLT_IF_NOT_FOUND;
713	}
714
715	dev_hold(pDev);
716	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
717	ASMAtomicUoWritePtr((void * volatile *)&pThis->u.s.pDev, pDev);
718	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
719
720	Log(("vboxNetFltLinuxAttachToInterface: Device %p(%s) retained. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
721	Log(("vboxNetFltLinuxAttachToInterface: Got pDev=%p pThis=%p pThis->u.s.pDev=%p\n", pDev, pThis, ASMAtomicUoReadPtr((void * volatile *)&pThis->u.s.pDev)));
722	/*
723	* Get the mac address while we still have a valid ifnet reference.
724	*/
725	memcpy(&pThis->u.s.Mac, pDev->dev_addr, sizeof(pThis->u.s.Mac));
726
727	pt = &pThis->u.s.PacketType;
728	pt->type = __constant_htons(ETH_P_ALL);
729	pt->dev = pDev;
730	pt->func = vboxNetFltLinuxPacketHandler;
731	dev_add_pack(pt);
732	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
733	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
734	if (pDev)
735	{
736	ASMAtomicUoWriteBool(&pThis->fDisconnectedFromHost, false);
737	ASMAtomicUoWriteBool(&pThis->u.s.fRegistered, true);
738	pDev = NULL; /* don't dereference it */
739	}
740	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
741	Log(("vboxNetFltLinuxAttachToInterface: this=%p: Packet handler installed.\n", pThis));
742
743	/* Release the interface on failure. */
744	if (pDev)
745	{
746	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
747	ASMAtomicUoWritePtr((void * volatile *)&pThis->u.s.pDev, NULL);
748	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
749	dev_put(pDev);
750	Log(("vboxNetFltLinuxAttachToInterface: Device %p(%s) released. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
751	}
752
753	LogRel(("VBoxNetFlt: attached to '%s' / %.*Rhxs\n", pThis->szName, sizeof(pThis->u.s.Mac), &pThis->u.s.Mac));
754	return VINF_SUCCESS;
755	}
756
757
758	static int vboxNetFltLinuxUnregisterDevice(PVBOXNETFLTINS pThis, struct net_device *pDev)
759	{
760	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
761
762	Assert(!pThis->fDisconnectedFromHost);
763	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
764	ASMAtomicWriteBool(&pThis->u.s.fRegistered, false);
765	ASMAtomicWriteBool(&pThis->fDisconnectedFromHost, true);
766	ASMAtomicUoWritePtr((void * volatile *)&pThis->u.s.pDev, NULL);
767	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
768
769	dev_remove_pack(&pThis->u.s.PacketType);
770	skb_queue_purge(&pThis->u.s.XmitQueue);
771	Log(("vboxNetFltLinuxUnregisterDevice: this=%p: Packet handler removed, xmit queue purged.\n", pThis));
772	Log(("vboxNetFltLinuxUnregisterDevice: Device %p(%s) released. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
773	dev_put(pDev);
774
775	return NOTIFY_OK;
776	}
777
778	static int vboxNetFltLinuxDeviceIsUp(PVBOXNETFLTINS pThis, struct net_device *pDev)
779	{
780	/* Check if we are not suspended and promiscuous mode has not been set. */
781	if (ASMAtomicUoReadBool(&pThis->fActive) && !ASMAtomicUoReadBool(&pThis->u.s.fPromiscuousSet))
782	{
783	/* Note that there is no need for locking as the kernel got hold of the lock already. */
784	dev_set_promiscuity(pDev, 1);
785	ASMAtomicWriteBool(&pThis->u.s.fPromiscuousSet, true);
786	Log(("vboxNetFltLinuxDeviceIsUp: enabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
787	}
788	else
789	Log(("vboxNetFltLinuxDeviceIsUp: no need to enable promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
790	return NOTIFY_OK;
791	}
792
793	static int vboxNetFltLinuxDeviceGoingDown(PVBOXNETFLTINS pThis, struct net_device *pDev)
794	{
795	/* Undo promiscuous mode if we has set it. */
796	if (ASMAtomicUoReadBool(&pThis->u.s.fPromiscuousSet))
797	{
798	/* Note that there is no need for locking as the kernel got hold of the lock already. */
799	dev_set_promiscuity(pDev, -1);
800	ASMAtomicWriteBool(&pThis->u.s.fPromiscuousSet, false);
801	Log(("vboxNetFltLinuxDeviceGoingDown: disabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
802	}
803	else
804	Log(("vboxNetFltLinuxDeviceGoingDown: no need to disable promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
805	return NOTIFY_OK;
806	}
807
808	static int vboxNetFltLinuxNotifierCallback(struct notifier_block self, unsigned long ulEventType, void ptr)
809
810	{
811	int rc = NOTIFY_OK;
812	#ifdef DEBUG
813	char *pszEvent = "<unknown>";
814	#endif
815	struct net_device pDev = (struct net_device )ptr;
816	PVBOXNETFLTINS pThis = VBOX_FLT_NB_TO_INST(self);
817
818	#ifdef DEBUG
819	switch (ulEventType)
820	{
821	case NETDEV_REGISTER: pszEvent = "NETDEV_REGISTER"; break;
822	case NETDEV_UNREGISTER: pszEvent = "NETDEV_UNREGISTER"; break;
823	case NETDEV_UP: pszEvent = "NETDEV_UP"; break;
824	case NETDEV_DOWN: pszEvent = "NETDEV_DOWN"; break;
825	case NETDEV_REBOOT: pszEvent = "NETDEV_REBOOT"; break;
826	case NETDEV_CHANGENAME: pszEvent = "NETDEV_CHANGENAME"; break;
827	case NETDEV_CHANGE: pszEvent = "NETDEV_CHANGE"; break;
828	case NETDEV_CHANGEMTU: pszEvent = "NETDEV_CHANGEMTU"; break;
829	case NETDEV_CHANGEADDR: pszEvent = "NETDEV_CHANGEADDR"; break;
830	case NETDEV_GOING_DOWN: pszEvent = "NETDEV_GOING_DOWN"; break;
831	}
832	Log(("VBoxNetFlt: got event %s(0x%lx) on %s, pDev=%p pThis=%p pThis->u.s.pDev=%p\n",
833	pszEvent, ulEventType, pDev->name, pDev, pThis, ASMAtomicUoReadPtr((void * volatile *)&pThis->u.s.pDev)));
834	#endif
835	if (ulEventType == NETDEV_REGISTER && !strcmp(pDev->name, pThis->szName))
836	{
837	vboxNetFltLinuxAttachToInterface(pThis, pDev);
838	}
839	else
840	{
841	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
842	if (pDev != ptr)
843	return NOTIFY_OK;
844	rc = NOTIFY_OK;
845	switch (ulEventType)
846	{
847	case NETDEV_UNREGISTER:
848	rc = vboxNetFltLinuxUnregisterDevice(pThis, pDev);
849	break;
850	case NETDEV_UP:
851	rc = vboxNetFltLinuxDeviceIsUp(pThis, pDev);
852	break;
853	case NETDEV_GOING_DOWN:
854	rc = vboxNetFltLinuxDeviceGoingDown(pThis, pDev);
855	break;
856	case NETDEV_CHANGENAME:
857	break;
858	}
859	}
860
861	return rc;
862	}
863
864	bool vboxNetFltOsMaybeRediscovered(PVBOXNETFLTINS pThis)
865	{
866	return !ASMAtomicUoReadBool(&pThis->fDisconnectedFromHost);
867	}
868
869	int vboxNetFltPortOsXmit(PVBOXNETFLTINS pThis, PINTNETSG pSG, uint32_t fDst)
870	{
871	struct net_device * pDev;
872	int err;
873	int rc = VINF_SUCCESS;
874
875	LogFlow(("vboxNetFltPortOsXmit: pThis=%p (%s)\n", pThis, pThis->szName));
876
877	pDev = vboxNetFltLinuxRetainNetDev(pThis);
878	if (pDev)
879	{
880	/*
881	* Create a sk_buff for the gather list and push it onto the wire.
882	*/
883	if (fDst & INTNETTRUNKDIR_WIRE)
884	{
885	struct sk_buff *pBuf = vboxNetFltLinuxSkBufFromSG(pThis, pSG, true);
886	if (pBuf)
887	{
888	vboxNetFltDumpPacket(pSG, true, "wire", 1);
889	Log4(("vboxNetFltPortOsXmit: pBuf->cb dump:\n%.*Rhxd\n", sizeof(pBuf->cb), pBuf->cb));
890	Log4(("vboxNetFltPortOsXmit: dev_queue_xmit(%p)\n", pBuf));
891	err = dev_queue_xmit(pBuf);
892	if (err)
893	rc = RTErrConvertFromErrno(err);
894	}
895	else
896	rc = VERR_NO_MEMORY;
897	}
898
899	/*
900	* Create a sk_buff for the gather list and push it onto the host stack.
901	*/
902	if (fDst & INTNETTRUNKDIR_HOST)
903	{
904	struct sk_buff *pBuf = vboxNetFltLinuxSkBufFromSG(pThis, pSG, false);
905	if (pBuf)
906	{
907	vboxNetFltDumpPacket(pSG, true, "host", (fDst & INTNETTRUNKDIR_WIRE) ? 0 : 1);
908	Log4(("vboxNetFltPortOsXmit: pBuf->cb dump:\n%.*Rhxd\n", sizeof(pBuf->cb), pBuf->cb));
909	Log4(("vboxNetFltPortOsXmit: netif_rx_ni(%p)\n", pBuf));
910	err = netif_rx_ni(pBuf);
911	if (err)
912	rc = RTErrConvertFromErrno(err);
913	}
914	else
915	rc = VERR_NO_MEMORY;
916	}
917
918	vboxNetFltLinuxReleaseNetDev(pThis, pDev);
919	}
920
921	return rc;
922	}
923
924
925	bool vboxNetFltPortOsIsPromiscuous(PVBOXNETFLTINS pThis)
926	{
927	bool fRc = false;
928	struct net_device * pDev = vboxNetFltLinuxRetainNetDev(pThis);
929	if (pDev)
930	{
931	fRc = !!(pDev->promiscuity - (ASMAtomicUoReadBool(&pThis->u.s.fPromiscuousSet) & 1));
932	LogFlow(("vboxNetFltPortOsIsPromiscuous: returns %d, pDev->promiscuity=%d, fPromiscuousSet=%d\n",
933	fRc, pDev->promiscuity, pThis->u.s.fPromiscuousSet));
934	vboxNetFltLinuxReleaseNetDev(pThis, pDev);
935	}
936	return fRc;
937	}
938
939
940	void vboxNetFltPortOsGetMacAddress(PVBOXNETFLTINS pThis, PRTMAC pMac)
941	{
942	*pMac = pThis->u.s.Mac;
943	}
944
945
946	bool vboxNetFltPortOsIsHostMac(PVBOXNETFLTINS pThis, PCRTMAC pMac)
947	{
948	/* ASSUMES that the MAC address never changes. */
949	return pThis->u.s.Mac.au16[0] == pMac->au16[0]
950	&& pThis->u.s.Mac.au16[1] == pMac->au16[1]
951	&& pThis->u.s.Mac.au16[2] == pMac->au16[2];
952	}
953
954
955	void vboxNetFltPortOsSetActive(PVBOXNETFLTINS pThis, bool fActive)
956	{
957	struct net_device * pDev;
958
959	LogFlow(("vboxNetFltPortOsSetActive: pThis=%p (%s), fActive=%s, fDisablePromiscuous=%s\n",
960	pThis, pThis->szName, fActive?"true":"false",
961	pThis->fDisablePromiscuous?"true":"false"));
962
963	if (pThis->fDisablePromiscuous)
964	return;
965
966	pDev = vboxNetFltLinuxRetainNetDev(pThis);
967	if (pDev)
968	{
969	/*
970	* This api is a bit weird, the best reference is the code.
971	*
972	* Also, we have a bit or race conditions wrt the maintance of
973	* host the interface promiscuity for vboxNetFltPortOsIsPromiscuous.
974	*/
975	#ifdef LOG_ENABLED
976	u_int16_t fIf;
977	unsigned const cPromiscBefore = VBOX_GET_PCOUNT(pDev);
978	#endif
979	if (fActive)
980	{
981	Assert(!pThis->u.s.fPromiscuousSet);
982
983	rtnl_lock();
984	dev_set_promiscuity(pDev, 1);
985	rtnl_unlock();
986	pThis->u.s.fPromiscuousSet = true;
987	Log(("vboxNetFltPortOsSetActive: enabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
988	}
989	else
990	{
991	if (pThis->u.s.fPromiscuousSet)
992	{
993	rtnl_lock();
994	dev_set_promiscuity(pDev, -1);
995	rtnl_unlock();
996	Log(("vboxNetFltPortOsSetActive: disabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
997	}
998	pThis->u.s.fPromiscuousSet = false;
999
1000	#ifdef LOG_ENABLED
1001	fIf = dev_get_flags(pDev);
1002	Log(("VBoxNetFlt: fIf=%#x; %d->%d\n", fIf, cPromiscBefore, VBOX_GET_PCOUNT(pDev)));
1003	#endif
1004	}
1005
1006	vboxNetFltLinuxReleaseNetDev(pThis, pDev);
1007	}
1008	}
1009
1010
1011	int vboxNetFltOsDisconnectIt(PVBOXNETFLTINS pThis)
1012	{
1013	/* Nothing to do here. */
1014	return VINF_SUCCESS;
1015	}
1016
1017
1018	int vboxNetFltOsConnectIt(PVBOXNETFLTINS pThis)
1019	{
1020	/* Nothing to do here. */
1021	return VINF_SUCCESS;
1022	}
1023
1024
1025	void vboxNetFltOsDeleteInstance(PVBOXNETFLTINS pThis)
1026	{
1027	struct net_device *pDev;
1028	bool fRegistered;
1029	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
1030
1031	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
1032	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
1033	fRegistered = ASMAtomicUoReadBool(&pThis->u.s.fRegistered);
1034	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
1035	if (fRegistered)
1036	{
1037	dev_remove_pack(&pThis->u.s.PacketType);
1038	skb_queue_purge(&pThis->u.s.XmitQueue);
1039	Log(("vboxNetFltOsDeleteInstance: this=%p: Packet handler removed, xmit queue purged.\n", pThis));
1040	Log(("vboxNetFltOsDeleteInstance: Device %p(%s) released. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
1041	dev_put(pDev);
1042	}
1043	Log(("vboxNetFltOsDeleteInstance: this=%p: Notifier removed.\n", pThis));
1044	unregister_netdevice_notifier(&pThis->u.s.Notifier);
1045	module_put(THIS_MODULE);
1046	}
1047
1048
1049	int vboxNetFltOsInitInstance(PVBOXNETFLTINS pThis, void *pvContext)
1050	{
1051	int err;
1052	NOREF(pvContext);
1053
1054	pThis->u.s.Notifier.notifier_call = vboxNetFltLinuxNotifierCallback;
1055	err = register_netdevice_notifier(&pThis->u.s.Notifier);
1056	if (err)
1057	return VERR_INTNET_FLT_IF_FAILED;
1058	if (!pThis->u.s.fRegistered)
1059	{
1060	unregister_netdevice_notifier(&pThis->u.s.Notifier);
1061	LogRel(("VBoxNetFlt: failed to find %s.\n", pThis->szName));
1062	return VERR_INTNET_FLT_IF_NOT_FOUND;
1063	}
1064
1065	Log(("vboxNetFltOsInitInstance: this=%p: Notifier installed.\n", pThis));
1066	if ( pThis->fDisconnectedFromHost
1067	\|\| !try_module_get(THIS_MODULE))
1068	return VERR_INTNET_FLT_IF_FAILED;
1069
1070	return VINF_SUCCESS;
1071	}
1072
1073	int vboxNetFltOsPreInitInstance(PVBOXNETFLTINS pThis)
1074	{
1075	/*
1076	* Init the linux specific members.
1077	*/
1078	pThis->u.s.pDev = NULL;
1079	pThis->u.s.fRegistered = false;
1080	pThis->u.s.fPromiscuousSet = false;
1081	memset(&pThis->u.s.PacketType, 0, sizeof(pThis->u.s.PacketType));
1082	skb_queue_head_init(&pThis->u.s.XmitQueue);
1083	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
1084	INIT_WORK(&pThis->u.s.XmitTask, vboxNetFltLinuxXmitTask);
1085	#else
1086	INIT_WORK(&pThis->u.s.XmitTask, vboxNetFltLinuxXmitTask, &pThis->u.s.XmitTask);
1087	#endif
1088
1089	return VINF_SUCCESS;
1090	}
1091

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source: vbox/trunk/src/VBox/HostDrivers/VBoxNetFlt/linux/VBoxNetFlt-linux.c@ 21351

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