VBoxNetFlt-linux.c@ 20345

Last change on this file since 20345 was 20345, checked in by vboxsync, 16 years ago
#3783: Include missing linux/ip.h.
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File size: 38.6 KB

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1	/* $Id: VBoxNetFlt-linux.c 20345 2009-06-05 15:58:07Z 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	#ifdef RT_ARCH_AMD64
128	/**
129	* Memory for the executable memory heap (in IPRT).
130	*/
131	extern uint8_t g_abExecMemory[4096]; /* cannot donate less than one page */
132	__asm__(".section execmemory, \"awx\", @progbits\n\t"
133	".align 32\n\t"
134	".globl g_abExecMemory\n"
135	"g_abExecMemory:\n\t"
136	".zero 4096\n\t"
137	".type g_abExecMemory, @object\n\t"
138	".size g_abExecMemory, 4096\n\t"
139	".text\n\t");
140	#endif
141
142	static VBOXNETFLTGLOBALS g_VBoxNetFltGlobals;
143
144	module_init(VBoxNetFltLinuxInit);
145	module_exit(VBoxNetFltLinuxUnload);
146
147	MODULE_AUTHOR("Sun Microsystems, Inc.");
148	MODULE_DESCRIPTION("VirtualBox Network Filter Driver");
149	MODULE_LICENSE("GPL");
150	#ifdef MODULE_VERSION
151	# define xstr(s) str(s)
152	# define str(s) #s
153	MODULE_VERSION(VBOX_VERSION_STRING " (" xstr(INTNETTRUNKIFPORT_VERSION) ")");
154	#endif
155
156	/**
157	* The (common) global data.
158	*/
159	static VBOXNETFLTGLOBALS g_VBoxNetFltGlobals;
160
161	/**
162	* Initialize module.
163	*
164	* @returns appropriate status code.
165	*/
166	static int __init VBoxNetFltLinuxInit(void)
167	{
168	int rc;
169	/*
170	* Initialize IPRT.
171	*/
172	rc = RTR0Init(0);
173	if (RT_SUCCESS(rc))
174	{
175	#ifdef RT_ARCH_AMD64
176	rc = RTR0MemExecDonate(&g_abExecMemory[0], sizeof(g_abExecMemory));
177	printk("VBoxNetFlt: dbg - g_abExecMemory=%p\n", (void *)&g_abExecMemory[0]);
178	if (RT_FAILURE(rc))
179	{
180	printk("VBoxNetFlt: failed to donate exec memory, no logging will be available.\n");
181	}
182	#endif
183	Log(("VBoxNetFltLinuxInit\n"));
184
185	/*
186	* Initialize the globals and connect to the support driver.
187	*
188	* This will call back vboxNetFltOsOpenSupDrv (and maybe vboxNetFltOsCloseSupDrv)
189	* for establishing the connect to the support driver.
190	*/
191	memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
192	rc = vboxNetFltInitGlobalsAndIdc(&g_VBoxNetFltGlobals);
193	if (RT_SUCCESS(rc))
194	{
195	LogRel(("VBoxNetFlt: Successfully started.\n"));
196	return 0;
197	}
198	else
199	LogRel(("VBoxNetFlt: failed to initialize device extension (rc=%d)\n", rc));
200	RTR0Term();
201	}
202	else
203	LogRel(("VBoxNetFlt: failed to initialize IPRT (rc=%d)\n", rc));
204
205	memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
206	return -RTErrConvertToErrno(rc);
207	}
208
209
210	/**
211	* Unload the module.
212	*
213	* @todo We have to prevent this if we're busy!
214	*/
215	static void __exit VBoxNetFltLinuxUnload(void)
216	{
217	int rc;
218	Log(("VBoxNetFltLinuxUnload\n"));
219	Assert(vboxNetFltCanUnload(&g_VBoxNetFltGlobals));
220
221	/*
222	* Undo the work done during start (in reverse order).
223	*/
224	rc = vboxNetFltTryDeleteIdcAndGlobals(&g_VBoxNetFltGlobals);
225	AssertRC(rc); NOREF(rc);
226
227	RTR0Term();
228
229	memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
230
231	Log(("VBoxNetFltLinuxUnload - done\n"));
232	}
233
234
235	/**
236	* Reads and retains the host interface handle.
237	*
238	* @returns The handle, NULL if detached.
239	* @param pThis
240	*/
241	DECLINLINE(struct net_device *) vboxNetFltLinuxRetainNetDev(PVBOXNETFLTINS pThis)
242	{
243	#if 0
244	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
245	struct net_device *pDev = NULL;
246
247	Log(("vboxNetFltLinuxRetainNetDev\n"));
248	/*
249	* Be careful here to avoid problems racing the detached callback.
250	*/
251	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
252	if (!ASMAtomicUoReadBool(&pThis->fDisconnectedFromHost))
253	{
254	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
255	if (pDev)
256	{
257	dev_hold(pDev);
258	Log(("vboxNetFltLinuxRetainNetDev: Device %p(%s) retained. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
259	}
260	}
261	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
262
263	Log(("vboxNetFltLinuxRetainNetDev - done\n"));
264	return pDev;
265	#else
266	return (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
267	#endif
268	}
269
270
271	/**
272	* Release the host interface handle previously retained
273	* by vboxNetFltLinuxRetainNetDev.
274	*
275	* @param pThis The instance.
276	* @param pDev The vboxNetFltLinuxRetainNetDev
277	* return value, NULL is fine.
278	*/
279	DECLINLINE(void) vboxNetFltLinuxReleaseNetDev(PVBOXNETFLTINS pThis, struct net_device *pDev)
280	{
281	#if 0
282	Log(("vboxNetFltLinuxReleaseNetDev\n"));
283	NOREF(pThis);
284	if (pDev)
285	{
286	dev_put(pDev);
287	Log(("vboxNetFltLinuxReleaseNetDev: Device %p(%s) released. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
288	}
289	Log(("vboxNetFltLinuxReleaseNetDev - done\n"));
290	#endif
291	}
292
293	#define VBOXNETFLT_CB_TAG(skb) (0xA1C90000 \| (skb->dev->ifindex & 0xFFFF))
294	#define VBOXNETFLT_SKB_TAG(skb) ((uint32_t)&((skb)->cb[sizeof((skb)->cb)-sizeof(uint32_t)]))
295
296	/**
297	* Checks whether this is an mbuf created by vboxNetFltLinuxMBufFromSG,
298	* i.e. a buffer which we're pushing and should be ignored by the filter callbacks.
299	*
300	* @returns true / false accordingly.
301	* @param pBuf The sk_buff.
302	*/
303	DECLINLINE(bool) vboxNetFltLinuxSkBufIsOur(struct sk_buff *pBuf)
304	{
305	return VBOXNETFLT_SKB_TAG(pBuf) == VBOXNETFLT_CB_TAG(pBuf);
306	}
307
308
309	/**
310	* Internal worker that create a linux sk_buff for a
311	* (scatter/)gather list.
312	*
313	* @returns Pointer to the sk_buff.
314	* @param pThis The instance.
315	* @param pSG The (scatter/)gather list.
316	*/
317	static struct sk_buff *vboxNetFltLinuxSkBufFromSG(PVBOXNETFLTINS pThis, PINTNETSG pSG, bool fDstWire)
318	{
319	struct sk_buff *pPkt;
320	struct net_device *pDev;
321	/*
322	* Because we're lazy, we will ASSUME that all SGs coming from INTNET
323	* will only contain one single segment.
324	*/
325	if (pSG->cSegsUsed != 1 \|\| pSG->cbTotal != pSG->aSegs[0].cb)
326	{
327	LogRel(("VBoxNetFlt: Dropped multi-segment(%d) packet coming from internal network.\n", pSG->cSegsUsed));
328	return NULL;
329	}
330	if (pSG->cbTotal == 0)
331	{
332	LogRel(("VBoxNetFlt: Dropped empty packet coming from internal network.\n"));
333	return NULL;
334	}
335
336	/*
337	* Allocate a packet and copy over the data.
338	*
339	*/
340	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
341	pPkt = dev_alloc_skb(pSG->cbTotal + NET_IP_ALIGN);
342	if (pPkt)
343	{
344	pPkt->dev = pDev;
345	/* Align IP header on 16-byte boundary: 2 + 14 (ethernet hdr size). */
346	skb_reserve(pPkt, NET_IP_ALIGN);
347	skb_put(pPkt, pSG->cbTotal);
348	memcpy(pPkt->data, pSG->aSegs[0].pv, pSG->cbTotal);
349	/* Set protocol and packet_type fields. */
350	pPkt->protocol = eth_type_trans(pPkt, pDev);
351	pPkt->ip_summed = CHECKSUM_NONE;
352	if (fDstWire)
353	{
354	VBOX_SKB_RESET_NETWORK_HDR(pPkt);
355	/* Restore ethernet header back. */
356	skb_push(pPkt, ETH_HLEN);
357	VBOX_SKB_RESET_MAC_HDR(pPkt);
358	}
359	VBOXNETFLT_SKB_TAG(pPkt) = VBOXNETFLT_CB_TAG(pPkt);
360
361	return pPkt;
362	}
363	else
364	Log(("vboxNetFltLinuxSkBufFromSG: Failed to allocate sk_buff(%u).\n", pSG->cbTotal));
365	pSG->pvUserData = NULL;
366
367	return NULL;
368	}
369
370
371	/**
372	* Initializes a SG list from an sk_buff.
373	*
374	* @returns Number of segments.
375	* @param pThis The instance.
376	* @param pBuf The sk_buff.
377	* @param pSG The SG.
378	* @param pvFrame The frame pointer, optional.
379	* @param cSegs The number of segments allocated for the SG.
380	* This should match the number in the mbuf exactly!
381	* @param fSrc The source of the frame.
382	*/
383	DECLINLINE(void) vboxNetFltLinuxSkBufToSG(PVBOXNETFLTINS pThis, struct sk_buff *pBuf, PINTNETSG pSG, unsigned cSegs, uint32_t fSrc)
384	{
385	int i;
386	NOREF(pThis);
387
388	Assert(!skb_shinfo(pBuf)->frag_list);
389	pSG->pvOwnerData = NULL;
390	pSG->pvUserData = NULL;
391	pSG->pvUserData2 = NULL;
392	pSG->cUsers = 1;
393	pSG->fFlags = INTNETSG_FLAGS_TEMP;
394	pSG->cSegsAlloc = cSegs;
395
396	if (fSrc & INTNETTRUNKDIR_WIRE)
397	{
398	/*
399	* The packet came from wire, ethernet header was removed by device driver.
400	* Restore it.
401	*/
402	skb_push(pBuf, ETH_HLEN);
403	}
404	pSG->cbTotal = pBuf->len;
405	#ifdef VBOXNETFLT_SG_SUPPORT
406	pSG->aSegs[0].cb = skb_headlen(pBuf);
407	pSG->aSegs[0].pv = pBuf->data;
408	pSG->aSegs[0].Phys = NIL_RTHCPHYS;
409
410	for (i = 0; i < skb_shinfo(pBuf)->nr_frags; i++)
411	{
412	skb_frag_t *pFrag = &skb_shinfo(pBuf)->frags[i];
413	pSG->aSegs[i+1].cb = pFrag->size;
414	pSG->aSegs[i+1].pv = kmap(pFrag->page);
415	printk("%p = kmap()\n", pSG->aSegs[i+1].pv);
416	pSG->aSegs[i+1].Phys = NIL_RTHCPHYS;
417	}
418	pSG->cSegsUsed = ++i;
419	#else
420	pSG->aSegs[0].cb = pBuf->len;
421	pSG->aSegs[0].pv = pBuf->data;
422	pSG->aSegs[0].Phys = NIL_RTHCPHYS;
423	pSG->cSegsUsed = i = 1;
424	#endif
425
426
427	#ifdef PADD_RUNT_FRAMES_FROM_HOST
428	/*
429	* Add a trailer if the frame is too small.
430	*
431	* Since we're getting to the packet before it is framed, it has not
432	* yet been padded. The current solution is to add a segment pointing
433	* to a buffer containing all zeros and pray that works for all frames...
434	*/
435	if (pSG->cbTotal < 60 && (fSrc & INTNETTRUNKDIR_HOST))
436	{
437	static uint8_t const s_abZero[128] = {0};
438
439	AssertReturnVoid(i < cSegs);
440
441	pSG->aSegs[i].Phys = NIL_RTHCPHYS;
442	pSG->aSegs[i].pv = (void *)&s_abZero[0];
443	pSG->aSegs[i].cb = 60 - pSG->cbTotal;
444	pSG->cbTotal = 60;
445	pSG->cSegsUsed++;
446	}
447	#endif
448	Log4(("vboxNetFltLinuxSkBufToSG: allocated=%d, segments=%d frags=%d next=%p frag_list=%p pkt_type=%x fSrc=%x\n",
449	pSG->cSegsAlloc, pSG->cSegsUsed, skb_shinfo(pBuf)->nr_frags, pBuf->next, skb_shinfo(pBuf)->frag_list, pBuf->pkt_type, fSrc));
450	for (i = 0; i < pSG->cSegsUsed; i++)
451	Log4(("vboxNetFltLinuxSkBufToSG: #%d: cb=%d pv=%p\n",
452	i, pSG->aSegs[i].cb, pSG->aSegs[i].pv));
453	}
454
455	/**
456	* Packet handler,
457	*
458	* @returns 0 or EJUSTRETURN.
459	* @param pThis The instance.
460	* @param pMBuf The mbuf.
461	* @param pvFrame The start of the frame, optional.
462	* @param fSrc Where the packet (allegedly) comes from, one INTNETTRUNKDIR_* value.
463	* @param eProtocol The protocol.
464	*/
465	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 14)
466	static int vboxNetFltLinuxPacketHandler(struct sk_buff *pBuf,
467	struct net_device *pSkbDev,
468	struct packet_type *pPacketType,
469	struct net_device *pOrigDev)
470	#else
471	static int vboxNetFltLinuxPacketHandler(struct sk_buff *pBuf,
472	struct net_device *pSkbDev,
473	struct packet_type *pPacketType)
474	#endif
475	{
476	PVBOXNETFLTINS pThis;
477	struct net_device *pDev;
478	LogFlow(("vboxNetFltLinuxPacketHandler: pBuf=%p pSkbDev=%p pPacketType=%p\n",
479	pBuf, pSkbDev, pPacketType));
480	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
481	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",
482	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));
483	#else
484	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",
485	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));
486	#endif
487	/*
488	* Drop it immediately?
489	*/
490	if (!pBuf)
491	return 0;
492
493	pThis = VBOX_FLT_PT_TO_INST(pPacketType);
494	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
495	if (pThis->u.s.pDev != pSkbDev)
496	{
497	Log(("vboxNetFltLinuxPacketHandler: Devices do not match, pThis may be wrong! pThis=%p\n", pThis));
498	return 0;
499	}
500
501	Log4(("vboxNetFltLinuxPacketHandler: pBuf->cb dump:\n%.*Rhxd\n", sizeof(pBuf->cb), pBuf->cb));
502	if (vboxNetFltLinuxSkBufIsOur(pBuf))
503	{
504	Log2(("vboxNetFltLinuxPacketHandler: got our own sk_buff, drop it.\n"));
505	dev_kfree_skb(pBuf);
506	return 0;
507	}
508
509	#ifndef VBOXNETFLT_SG_SUPPORT
510	{
511	/*
512	* Get rid of fragmented packets, they cause too much trouble.
513	*/
514	struct sk_buff *pCopy = skb_copy(pBuf, GFP_ATOMIC);
515	kfree_skb(pBuf);
516	if (!pCopy)
517	{
518	LogRel(("VBoxNetFlt: Failed to allocate packet buffer, dropping the packet.\n"));
519	return 0;
520	}
521	pBuf = pCopy;
522	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
523	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",
524	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));
525	#else
526	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",
527	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));
528	#endif
529	}
530	#endif
531
532	/* Add the packet to transmit queue and schedule the bottom half. */
533	skb_queue_tail(&pThis->u.s.XmitQueue, pBuf);
534	schedule_work(&pThis->u.s.XmitTask);
535	Log4(("vboxNetFltLinuxPacketHandler: scheduled work %p for sk_buff %p\n",
536	&pThis->u.s.XmitTask, pBuf));
537	/* It does not really matter what we return, it is ignored by the kernel. */
538	return 0;
539	}
540
541	static unsigned vboxNetFltLinuxSGSegments(PVBOXNETFLTINS pThis, struct sk_buff *pBuf)
542	{
543	#ifdef VBOXNETFLT_SG_SUPPORT
544	unsigned cSegs = 1 + skb_shinfo(pBuf)->nr_frags;
545	#else
546	unsigned cSegs = 1;
547	#endif
548	#ifdef PADD_RUNT_FRAMES_FROM_HOST
549	/*
550	* Add a trailer if the frame is too small.
551	*/
552	if (pBuf->len < 60)
553	cSegs++;
554	#endif
555	return cSegs;
556	}
557
558	/* WARNING! This function should only be called after vboxNetFltLinuxSkBufToSG()! */
559	static void vboxNetFltLinuxFreeSkBuff(struct sk_buff *pBuf, PINTNETSG pSG)
560	{
561	#ifdef VBOXNETFLT_SG_SUPPORT
562	int i;
563
564	for (i = 0; i < skb_shinfo(pBuf)->nr_frags; i++)
565	{
566	printk("kunmap(%p)\n", pSG->aSegs[i+1].pv);
567	kunmap(pSG->aSegs[i+1].pv);
568	}
569	#endif
570
571	dev_kfree_skb(pBuf);
572	}
573
574	#ifndef LOG_ENABLED
575	#define vboxNetFltDumpPacket(a, b, c, d)
576	#else
577	static void vboxNetFltDumpPacket(PINTNETSG pSG, bool fEgress, const char *pszWhere, int iIncrement)
578	{
579	uint8_t pInt, pExt;
580	static int iPacketNo = 1;
581	iPacketNo += iIncrement;
582	if (fEgress)
583	{
584	pExt = pSG->aSegs[0].pv;
585	pInt = pExt + 6;
586	}
587	else
588	{
589	pInt = pSG->aSegs[0].pv;
590	pExt = pInt + 6;
591	}
592	Log(("VBoxNetFlt: (int)%02x:%02x:%02x:%02x:%02x:%02x"
593	" %s (%s)%02x:%02x:%02x:%02x:%02x:%02x (%u bytes) packet #%u\n",
594	pInt[0], pInt[1], pInt[2], pInt[3], pInt[4], pInt[5],
595	fEgress ? "-->" : "<--", pszWhere,
596	pExt[0], pExt[1], pExt[2], pExt[3], pExt[4], pExt[5],
597	pSG->cbTotal, iPacketNo));
598	Log3(("%.*Rhxd\n", pSG->aSegs[0].cb, pSG->aSegs[0].pv));
599	}
600	#endif
601
602	static int vboxNetFltLinuxForwardSegment(PVBOXNETFLTINS pThis, struct sk_buff *pBuf, uint32_t fSrc)
603	{
604	unsigned cSegs = vboxNetFltLinuxSGSegments(pThis, pBuf);
605	if (cSegs < MAX_SKB_FRAGS)
606	{
607	uint8_t *pTmp;
608	PINTNETSG pSG = (PINTNETSG)alloca(RT_OFFSETOF(INTNETSG, aSegs[cSegs]));
609	if (!pSG)
610	{
611	Log(("VBoxNetFlt: Failed to allocate SG buffer.\n"));
612	return VERR_NO_MEMORY;
613	}
614	vboxNetFltLinuxSkBufToSG(pThis, pBuf, pSG, cSegs, fSrc);
615
616	pTmp = pSG->aSegs[0].pv;
617	vboxNetFltDumpPacket(pSG, false, (fSrc & INTNETTRUNKDIR_HOST) ? "host" : "wire", 1);
618	pThis->pSwitchPort->pfnRecv(pThis->pSwitchPort, pSG, fSrc);
619	Log4(("VBoxNetFlt: Dropping the sk_buff.\n"));
620	vboxNetFltLinuxFreeSkBuff(pBuf, pSG);
621	}
622
623	return VINF_SUCCESS;
624	}
625
626	static void vboxNetFltLinuxForwardToIntNet(PVBOXNETFLTINS pThis, struct sk_buff *pBuf)
627	{
628	uint32_t fSrc = pBuf->pkt_type == PACKET_OUTGOING ? INTNETTRUNKDIR_HOST : INTNETTRUNKDIR_WIRE;
629
630	if (VBOX_SKB_IS_GSO(pBuf))
631	{
632	/* Need to segment the packet */
633	struct sk_buff pNext, pSegment;
634	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
635	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",
636	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));
637	#endif
638
639	pSegment = VBOX_SKB_GSO_SEGMENT(pBuf);
640	if (IS_ERR(pSegment))
641	{
642	dev_kfree_skb(pBuf);
643	LogRel(("VBoxNetFlt: Failed to segment a packet (%d).\n", PTR_ERR(pBuf)));
644	return;
645	}
646	for (; pSegment; pSegment = pNext)
647	{
648	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
649	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",
650	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));
651	#endif
652	pNext = pSegment->next;
653	pSegment->next = 0;
654	vboxNetFltLinuxForwardSegment(pThis, pSegment, fSrc);
655	}
656	dev_kfree_skb(pBuf);
657	}
658	else
659	{
660	if (pBuf->ip_summed == CHECKSUM_PARTIAL && pBuf->pkt_type == PACKET_OUTGOING)
661	{
662	#if LINUX_VERSION_CODE == KERNEL_VERSION(2, 6, 18)
663	/*
664	* Try to work around the problem with CentOS 5.2 (2.6.18 kernel),
665	* it passes wrong 'h' pointer down. We take IP header length from
666	* the header itself and reconstruct 'h' pointer to TCP (or whatever)
667	* header.
668	*/
669	unsigned char *tmp = pBuf->h.raw;
670	if (pBuf->h.raw == pBuf->nh.raw && pBuf->protocol == htons(ETH_P_IP))
671	pBuf->h.raw = pBuf->nh.raw + pBuf->nh.iph->ihl * 4;
672	#endif /* LINUX_VERSION_CODE == KERNEL_VERSION(2, 6, 18) */
673	if (VBOX_SKB_CHECKSUM_HELP(pBuf))
674	{
675	LogRel(("VBoxNetFlt: Failed to compute checksum, dropping the packet.\n"));
676	dev_kfree_skb(pBuf);
677	return;
678	}
679	#if LINUX_VERSION_CODE == KERNEL_VERSION(2, 6, 18)
680	/* Restore the original (wrong) pointer. */
681	pBuf->h.raw = tmp;
682	#endif /* LINUX_VERSION_CODE == KERNEL_VERSION(2, 6, 18) */
683	}
684	vboxNetFltLinuxForwardSegment(pThis, pBuf, fSrc);
685	}
686	/*
687	* Create a (scatter/)gather list for the sk_buff and feed it to the internal network.
688	*/
689	}
690
691	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
692	static void vboxNetFltLinuxXmitTask(struct work_struct *pWork)
693	#else
694	static void vboxNetFltLinuxXmitTask(void *pWork)
695	#endif
696	{
697	struct sk_buff *pBuf;
698	bool fActive;
699	PVBOXNETFLTINS pThis;
700	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
701
702	Log4(("vboxNetFltLinuxXmitTask: Got work %p.\n", pWork));
703	pThis = VBOX_FLT_XT_TO_INST(pWork);
704	/*
705	* Active? Retain the instance and increment the busy counter.
706	*/
707	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
708	fActive = ASMAtomicUoReadBool(&pThis->fActive);
709	if (fActive)
710	vboxNetFltRetain(pThis, true /* fBusy */);
711	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
712	if (!fActive)
713	return;
714
715	while ((pBuf = skb_dequeue(&pThis->u.s.XmitQueue)) != 0)
716	vboxNetFltLinuxForwardToIntNet(pThis, pBuf);
717
718	vboxNetFltRelease(pThis, true /* fBusy */);
719	}
720
721	/**
722	* Internal worker for vboxNetFltOsInitInstance and vboxNetFltOsMaybeRediscovered.
723	*
724	* @returns VBox status code.
725	* @param pThis The instance.
726	* @param fRediscovery If set we're doing a rediscovery attempt, so, don't
727	* flood the release log.
728	*/
729	static int vboxNetFltLinuxAttachToInterface(PVBOXNETFLTINS pThis, struct net_device *pDev)
730	{
731	struct packet_type *pt;
732	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
733
734	LogFlow(("vboxNetFltLinuxAttachToInterface: pThis=%p (%s)\n", pThis, pThis->szName));
735
736	if (!pDev)
737	{
738	Log(("VBoxNetFlt: failed to find device '%s'\n", pThis->szName));
739	return VERR_INTNET_FLT_IF_NOT_FOUND;
740	}
741
742	dev_hold(pDev);
743	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
744	ASMAtomicUoWritePtr((void * volatile *)&pThis->u.s.pDev, pDev);
745	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
746
747	Log(("vboxNetFltLinuxAttachToInterface: Device %p(%s) retained. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
748	Log(("vboxNetFltLinuxAttachToInterface: Got pDev=%p pThis=%p pThis->u.s.pDev=%p\n", pDev, pThis, ASMAtomicUoReadPtr((void * volatile *)&pThis->u.s.pDev)));
749	/*
750	* Get the mac address while we still have a valid ifnet reference.
751	*/
752	memcpy(&pThis->u.s.Mac, pDev->dev_addr, sizeof(pThis->u.s.Mac));
753
754	pt = &pThis->u.s.PacketType;
755	pt->type = __constant_htons(ETH_P_ALL);
756	pt->dev = pDev;
757	pt->func = vboxNetFltLinuxPacketHandler;
758	dev_add_pack(pt);
759	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
760	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
761	if (pDev)
762	{
763	ASMAtomicUoWriteBool(&pThis->fDisconnectedFromHost, false);
764	ASMAtomicUoWriteBool(&pThis->u.s.fRegistered, true);
765	pDev = NULL; /* don't dereference it */
766	}
767	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
768	Log(("vboxNetFltLinuxAttachToInterface: this=%p: Packet handler installed.\n", pThis));
769
770	/* Release the interface on failure. */
771	if (pDev)
772	{
773	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
774	ASMAtomicUoWritePtr((void * volatile *)&pThis->u.s.pDev, NULL);
775	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
776	dev_put(pDev);
777	Log(("vboxNetFltLinuxAttachToInterface: Device %p(%s) released. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
778	}
779
780	LogRel(("VBoxNetFlt: attached to '%s' / %.*Rhxs\n", pThis->szName, sizeof(pThis->u.s.Mac), &pThis->u.s.Mac));
781	return VINF_SUCCESS;
782	}
783
784
785	static int vboxNetFltLinuxUnregisterDevice(PVBOXNETFLTINS pThis, struct net_device *pDev)
786	{
787	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
788
789	Assert(!pThis->fDisconnectedFromHost);
790	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
791	ASMAtomicWriteBool(&pThis->u.s.fRegistered, false);
792	ASMAtomicWriteBool(&pThis->fDisconnectedFromHost, true);
793	ASMAtomicUoWritePtr((void * volatile *)&pThis->u.s.pDev, NULL);
794	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
795
796	dev_remove_pack(&pThis->u.s.PacketType);
797	skb_queue_purge(&pThis->u.s.XmitQueue);
798	Log(("vboxNetFltLinuxUnregisterDevice: this=%p: Packet handler removed, xmit queue purged.\n", pThis));
799	Log(("vboxNetFltLinuxUnregisterDevice: Device %p(%s) released. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
800	dev_put(pDev);
801
802	return NOTIFY_OK;
803	}
804
805	static int vboxNetFltLinuxDeviceIsUp(PVBOXNETFLTINS pThis, struct net_device *pDev)
806	{
807	/* Check if we are not suspended and promiscuous mode has not been set. */
808	if (ASMAtomicUoReadBool(&pThis->fActive) && !ASMAtomicUoReadBool(&pThis->u.s.fPromiscuousSet))
809	{
810	/* Note that there is no need for locking as the kernel got hold of the lock already. */
811	dev_set_promiscuity(pDev, 1);
812	ASMAtomicWriteBool(&pThis->u.s.fPromiscuousSet, true);
813	Log(("vboxNetFltLinuxDeviceIsUp: enabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
814	}
815	else
816	Log(("vboxNetFltLinuxDeviceIsUp: no need to enable promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
817	return NOTIFY_OK;
818	}
819
820	static int vboxNetFltLinuxDeviceGoingDown(PVBOXNETFLTINS pThis, struct net_device *pDev)
821	{
822	/* Undo promiscuous mode if we has set it. */
823	if (ASMAtomicUoReadBool(&pThis->u.s.fPromiscuousSet))
824	{
825	/* Note that there is no need for locking as the kernel got hold of the lock already. */
826	dev_set_promiscuity(pDev, -1);
827	ASMAtomicWriteBool(&pThis->u.s.fPromiscuousSet, false);
828	Log(("vboxNetFltLinuxDeviceGoingDown: disabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
829	}
830	else
831	Log(("vboxNetFltLinuxDeviceGoingDown: no need to disable promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
832	return NOTIFY_OK;
833	}
834
835	static int vboxNetFltLinuxNotifierCallback(struct notifier_block self, unsigned long ulEventType, void ptr)
836
837	{
838	int rc = NOTIFY_OK;
839	#ifdef DEBUG
840	char *pszEvent = "<unknown>";
841	#endif
842	struct net_device pDev = (struct net_device )ptr;
843	PVBOXNETFLTINS pThis = VBOX_FLT_NB_TO_INST(self);
844
845	#ifdef DEBUG
846	switch (ulEventType)
847	{
848	case NETDEV_REGISTER: pszEvent = "NETDEV_REGISTER"; break;
849	case NETDEV_UNREGISTER: pszEvent = "NETDEV_UNREGISTER"; break;
850	case NETDEV_UP: pszEvent = "NETDEV_UP"; break;
851	case NETDEV_DOWN: pszEvent = "NETDEV_DOWN"; break;
852	case NETDEV_REBOOT: pszEvent = "NETDEV_REBOOT"; break;
853	case NETDEV_CHANGENAME: pszEvent = "NETDEV_CHANGENAME"; break;
854	case NETDEV_CHANGE: pszEvent = "NETDEV_CHANGE"; break;
855	case NETDEV_CHANGEMTU: pszEvent = "NETDEV_CHANGEMTU"; break;
856	case NETDEV_CHANGEADDR: pszEvent = "NETDEV_CHANGEADDR"; break;
857	case NETDEV_GOING_DOWN: pszEvent = "NETDEV_GOING_DOWN"; break;
858	}
859	Log(("VBoxNetFlt: got event %s(0x%lx) on %s, pDev=%p pThis=%p pThis->u.s.pDev=%p\n",
860	pszEvent, ulEventType, pDev->name, pDev, pThis, ASMAtomicUoReadPtr((void * volatile *)&pThis->u.s.pDev)));
861	#endif
862	if (ulEventType == NETDEV_REGISTER && !strcmp(pDev->name, pThis->szName))
863	{
864	vboxNetFltLinuxAttachToInterface(pThis, pDev);
865	}
866	else
867	{
868	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
869	if (pDev != ptr)
870	return NOTIFY_OK;
871	rc = NOTIFY_OK;
872	switch (ulEventType)
873	{
874	case NETDEV_UNREGISTER:
875	rc = vboxNetFltLinuxUnregisterDevice(pThis, pDev);
876	break;
877	case NETDEV_UP:
878	rc = vboxNetFltLinuxDeviceIsUp(pThis, pDev);
879	break;
880	case NETDEV_GOING_DOWN:
881	rc = vboxNetFltLinuxDeviceGoingDown(pThis, pDev);
882	break;
883	case NETDEV_CHANGENAME:
884	break;
885	}
886	}
887
888	return rc;
889	}
890
891	bool vboxNetFltOsMaybeRediscovered(PVBOXNETFLTINS pThis)
892	{
893	return !ASMAtomicUoReadBool(&pThis->fDisconnectedFromHost);
894	}
895
896	int vboxNetFltPortOsXmit(PVBOXNETFLTINS pThis, PINTNETSG pSG, uint32_t fDst)
897	{
898	struct net_device * pDev;
899	int err;
900	int rc = VINF_SUCCESS;
901
902	LogFlow(("vboxNetFltPortOsXmit: pThis=%p (%s)\n", pThis, pThis->szName));
903
904	pDev = vboxNetFltLinuxRetainNetDev(pThis);
905	if (pDev)
906	{
907	/*
908	* Create a sk_buff for the gather list and push it onto the wire.
909	*/
910	if (fDst & INTNETTRUNKDIR_WIRE)
911	{
912	struct sk_buff *pBuf = vboxNetFltLinuxSkBufFromSG(pThis, pSG, true);
913	if (pBuf)
914	{
915	vboxNetFltDumpPacket(pSG, true, "wire", 1);
916	Log4(("vboxNetFltPortOsXmit: pBuf->cb dump:\n%.*Rhxd\n", sizeof(pBuf->cb), pBuf->cb));
917	Log4(("vboxNetFltPortOsXmit: dev_queue_xmit(%p)\n", pBuf));
918	err = dev_queue_xmit(pBuf);
919	if (err)
920	rc = RTErrConvertFromErrno(err);
921	}
922	else
923	rc = VERR_NO_MEMORY;
924	}
925
926	/*
927	* Create a sk_buff for the gather list and push it onto the host stack.
928	*/
929	if (fDst & INTNETTRUNKDIR_HOST)
930	{
931	struct sk_buff *pBuf = vboxNetFltLinuxSkBufFromSG(pThis, pSG, false);
932	if (pBuf)
933	{
934	vboxNetFltDumpPacket(pSG, true, "host", (fDst & INTNETTRUNKDIR_WIRE) ? 0 : 1);
935	Log4(("vboxNetFltPortOsXmit: pBuf->cb dump:\n%.*Rhxd\n", sizeof(pBuf->cb), pBuf->cb));
936	Log4(("vboxNetFltPortOsXmit: netif_rx_ni(%p)\n", pBuf));
937	err = netif_rx_ni(pBuf);
938	if (err)
939	rc = RTErrConvertFromErrno(err);
940	}
941	else
942	rc = VERR_NO_MEMORY;
943	}
944
945	vboxNetFltLinuxReleaseNetDev(pThis, pDev);
946	}
947
948	return rc;
949	}
950
951
952	bool vboxNetFltPortOsIsPromiscuous(PVBOXNETFLTINS pThis)
953	{
954	bool fRc = false;
955	struct net_device * pDev = vboxNetFltLinuxRetainNetDev(pThis);
956	if (pDev)
957	{
958	fRc = !!(pDev->promiscuity - (ASMAtomicUoReadBool(&pThis->u.s.fPromiscuousSet) & 1));
959	LogFlow(("vboxNetFltPortOsIsPromiscuous: returns %d, pDev->promiscuity=%d, fPromiscuousSet=%d\n",
960	fRc, pDev->promiscuity, pThis->u.s.fPromiscuousSet));
961	vboxNetFltLinuxReleaseNetDev(pThis, pDev);
962	}
963	return fRc;
964	}
965
966
967	void vboxNetFltPortOsGetMacAddress(PVBOXNETFLTINS pThis, PRTMAC pMac)
968	{
969	*pMac = pThis->u.s.Mac;
970	}
971
972
973	bool vboxNetFltPortOsIsHostMac(PVBOXNETFLTINS pThis, PCRTMAC pMac)
974	{
975	/* ASSUMES that the MAC address never changes. */
976	return pThis->u.s.Mac.au16[0] == pMac->au16[0]
977	&& pThis->u.s.Mac.au16[1] == pMac->au16[1]
978	&& pThis->u.s.Mac.au16[2] == pMac->au16[2];
979	}
980
981
982	void vboxNetFltPortOsSetActive(PVBOXNETFLTINS pThis, bool fActive)
983	{
984	struct net_device * pDev;
985
986	LogFlow(("vboxNetFltPortOsSetActive: pThis=%p (%s), fActive=%s, fDisablePromiscuous=%s\n",
987	pThis, pThis->szName, fActive?"true":"false",
988	pThis->fDisablePromiscuous?"true":"false"));
989
990	if (pThis->fDisablePromiscuous)
991	return;
992
993	pDev = vboxNetFltLinuxRetainNetDev(pThis);
994	if (pDev)
995	{
996	/*
997	* This api is a bit weird, the best reference is the code.
998	*
999	* Also, we have a bit or race conditions wrt the maintance of
1000	* host the interface promiscuity for vboxNetFltPortOsIsPromiscuous.
1001	*/
1002	#ifdef LOG_ENABLED
1003	u_int16_t fIf;
1004	unsigned const cPromiscBefore = VBOX_GET_PCOUNT(pDev);
1005	#endif
1006	if (fActive)
1007	{
1008	Assert(!pThis->u.s.fPromiscuousSet);
1009
1010	rtnl_lock();
1011	dev_set_promiscuity(pDev, 1);
1012	rtnl_unlock();
1013	pThis->u.s.fPromiscuousSet = true;
1014	Log(("vboxNetFltPortOsSetActive: enabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
1015	}
1016	else
1017	{
1018	if (pThis->u.s.fPromiscuousSet)
1019	{
1020	rtnl_lock();
1021	dev_set_promiscuity(pDev, -1);
1022	rtnl_unlock();
1023	Log(("vboxNetFltPortOsSetActive: disabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pDev)));
1024	}
1025	pThis->u.s.fPromiscuousSet = false;
1026
1027	#ifdef LOG_ENABLED
1028	fIf = dev_get_flags(pDev);
1029	Log(("VBoxNetFlt: fIf=%#x; %d->%d\n", fIf, cPromiscBefore, VBOX_GET_PCOUNT(pDev)));
1030	#endif
1031	}
1032
1033	vboxNetFltLinuxReleaseNetDev(pThis, pDev);
1034	}
1035	}
1036
1037
1038	int vboxNetFltOsDisconnectIt(PVBOXNETFLTINS pThis)
1039	{
1040	/* Nothing to do here. */
1041	return VINF_SUCCESS;
1042	}
1043
1044
1045	int vboxNetFltOsConnectIt(PVBOXNETFLTINS pThis)
1046	{
1047	/* Nothing to do here. */
1048	return VINF_SUCCESS;
1049	}
1050
1051
1052	void vboxNetFltOsDeleteInstance(PVBOXNETFLTINS pThis)
1053	{
1054	struct net_device *pDev;
1055	bool fRegistered;
1056	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
1057
1058	RTSpinlockAcquire(pThis->hSpinlock, &Tmp);
1059	pDev = (struct net_device )ASMAtomicUoReadPtr((void volatile *)&pThis->u.s.pDev);
1060	fRegistered = ASMAtomicUoReadBool(&pThis->u.s.fRegistered);
1061	RTSpinlockRelease(pThis->hSpinlock, &Tmp);
1062	if (fRegistered)
1063	{
1064	dev_remove_pack(&pThis->u.s.PacketType);
1065	skb_queue_purge(&pThis->u.s.XmitQueue);
1066	Log(("vboxNetFltOsDeleteInstance: this=%p: Packet handler removed, xmit queue purged.\n", pThis));
1067	Log(("vboxNetFltOsDeleteInstance: Device %p(%s) released. ref=%d\n", pDev, pDev->name, atomic_read(&pDev->refcnt)));
1068	dev_put(pDev);
1069	}
1070	Log(("vboxNetFltOsDeleteInstance: this=%p: Notifier removed.\n", pThis));
1071	unregister_netdevice_notifier(&pThis->u.s.Notifier);
1072	module_put(THIS_MODULE);
1073	}
1074
1075
1076	int vboxNetFltOsInitInstance(PVBOXNETFLTINS pThis, void *pvContext)
1077	{
1078	int err;
1079	NOREF(pvContext);
1080
1081	pThis->u.s.Notifier.notifier_call = vboxNetFltLinuxNotifierCallback;
1082	err = register_netdevice_notifier(&pThis->u.s.Notifier);
1083	if (err)
1084	return VERR_INTNET_FLT_IF_FAILED;
1085	if (!pThis->u.s.fRegistered)
1086	{
1087	unregister_netdevice_notifier(&pThis->u.s.Notifier);
1088	LogRel(("VBoxNetFlt: failed to find %s.\n", pThis->szName));
1089	return VERR_INTNET_FLT_IF_NOT_FOUND;
1090	}
1091
1092	Log(("vboxNetFltOsInitInstance: this=%p: Notifier installed.\n", pThis));
1093	if ( pThis->fDisconnectedFromHost
1094	\|\| !try_module_get(THIS_MODULE))
1095	return VERR_INTNET_FLT_IF_FAILED;
1096
1097	return VINF_SUCCESS;
1098	}
1099
1100	int vboxNetFltOsPreInitInstance(PVBOXNETFLTINS pThis)
1101	{
1102	/*
1103	* Init the linux specific members.
1104	*/
1105	pThis->u.s.pDev = NULL;
1106	pThis->u.s.fRegistered = false;
1107	pThis->u.s.fPromiscuousSet = false;
1108	memset(&pThis->u.s.PacketType, 0, sizeof(pThis->u.s.PacketType));
1109	skb_queue_head_init(&pThis->u.s.XmitQueue);
1110	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
1111	INIT_WORK(&pThis->u.s.XmitTask, vboxNetFltLinuxXmitTask);
1112	#else
1113	INIT_WORK(&pThis->u.s.XmitTask, vboxNetFltLinuxXmitTask, &pThis->u.s.XmitTask);
1114	#endif
1115
1116	return VINF_SUCCESS;
1117	}
1118

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source: vbox/trunk/src/VBox/HostDrivers/VBoxNetFlt/linux/VBoxNetFlt-linux.c@ 20345

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