USBProxyDevice-linux.cpp@ 76729

Last change on this file since 76729 was 76729, checked in by vboxsync, 6 years ago
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1	/* $Id: USBProxyDevice-linux.cpp 76729 2019-01-09 10:19:36Z vboxsync $ */
2	/** @file
3	* USB device proxy - the Linux backend.
4	*/
5
6	/*
7	* Copyright (C) 2006-2019 Oracle Corporation
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
18
19	/*********************************************************************************************************************************
20	* Defined Constants And Macros *
21	*********************************************************************************************************************************/
22
23
24	/*********************************************************************************************************************************
25	* Header Files *
26	*********************************************************************************************************************************/
27	#define LOG_GROUP LOG_GROUP_DRV_USBPROXY
28
29	#include <iprt/stdint.h>
30	#include <iprt/err.h>
31	#include <iprt/pipe.h>
32
33	#include <sys/types.h>
34	#include <sys/stat.h>
35	#include <sys/vfs.h>
36	#include <sys/ioctl.h>
37	#include <sys/poll.h>
38	#include <stdint.h>
39	#include <stdio.h>
40	#include <string.h>
41	#include <stdlib.h>
42	#include <limits.h>
43	#include <unistd.h>
44	#include <fcntl.h>
45	#include <errno.h>
46	#ifdef VBOX_WITH_LINUX_COMPILER_H
47	# include <linux/compiler.h>
48	#endif
49	#include <linux/usbdevice_fs.h>
50
51	#ifndef RDESKTOP
52	# include <VBox/vmm/pdm.h>
53	#else
54	# define RTCRITSECT void *
55	static inline int rtcsNoop() { return VINF_SUCCESS; }
56	static inline bool rtcsTrue() { return true; }
57	# define RTCritSectInit(a) rtcsNoop()
58	# define RTCritSectDelete(a) rtcsNoop()
59	# define RTCritSectEnter(a) rtcsNoop()
60	# define RTCritSectLeave(a) rtcsNoop()
61	# define RTCritSectIsOwner(a) rtcsTrue()
62	#endif
63	#include <VBox/err.h>
64	#include <VBox/log.h>
65	#include <iprt/alloc.h>
66	#include <iprt/assert.h>
67	#include <iprt/asm.h>
68	#include <iprt/ctype.h>
69	#include <iprt/file.h>
70	#include <iprt/linux/sysfs.h>
71	#include <iprt/stream.h>
72	#include <iprt/string.h>
73	#include <iprt/list.h>
74	#include <iprt/time.h>
75	#include "../USBProxyDevice.h"
76
77
78	/*********************************************************************************************************************************
79	* Structures and Typedefs *
80	*********************************************************************************************************************************/
81	/**
82	* Wrapper around the linux urb request structure.
83	* This is required to track in-flight and landed URBs.
84	*/
85	typedef struct USBPROXYURBLNX
86	{
87	/** The kernel URB data. */
88	#if RT_GNUC_PREREQ(6, 0)
89	/* gcc 6.2 complains about the [] member of KUrb */
90	# pragma GCC diagnostic push
91	# pragma GCC diagnostic ignored "-Wpedantic"
92	#endif
93	struct usbdevfs_urb KUrb;
94	#if RT_GNUC_PREREQ(6, 0)
95	# pragma GCC diagnostic pop
96	#endif
97	/** Space filler for the isochronous packets. */
98	struct usbdevfs_iso_packet_desc aIsocPktsDonUseTheseUseTheOnesInKUrb[8];
99	/** Node to link the URB in of the existing lists. */
100	RTLISTNODE NodeList;
101	/** If we've split the VUSBURB up into multiple linux URBs, this is points to the head. */
102	struct USBPROXYURBLNX *pSplitHead;
103	/** The next linux URB if split up. */
104	struct USBPROXYURBLNX *pSplitNext;
105	/** Don't report these back. */
106	bool fCanceledBySubmit;
107	/** This split element is reaped. */
108	bool fSplitElementReaped;
109	/** This URB was discarded. */
110	bool fDiscarded;
111	/** Size to transfer in remaining fragments of a split URB */
112	uint32_t cbSplitRemaining;
113	} USBPROXYURBLNX, *PUSBPROXYURBLNX;
114
115	/**
116	* Data for the linux usb proxy backend.
117	*/
118	typedef struct USBPROXYDEVLNX
119	{
120	/** The open file. */
121	RTFILE hFile;
122	/** Critical section protecting the lists. */
123	RTCRITSECT CritSect;
124	/** The list of free linux URBs (USBPROXYURBLNX). */
125	RTLISTANCHOR ListFree;
126	/** The list of active linux URBs.
127	* We must maintain this so we can properly reap URBs of a detached device.
128	* Only the split head will appear in this list. (USBPROXYURBLNX) */
129	RTLISTANCHOR ListInFlight;
130	/** Are we using sysfs to find the active configuration? */
131	bool fUsingSysfs;
132	/** Pipe handle for waiking up - writing end. */
133	RTPIPE hPipeWakeupW;
134	/** Pipe handle for waiking up - reading end. */
135	RTPIPE hPipeWakeupR;
136	/** The device node/sysfs path of the device.
137	* Used to figure out the configuration after a reset. */
138	char *pszPath;
139	/** Mask of claimed interfaces. */
140	uint32_t fClaimedIfsMask;
141	} USBPROXYDEVLNX, *PUSBPROXYDEVLNX;
142
143
144	/*********************************************************************************************************************************
145	* Internal Functions *
146	*********************************************************************************************************************************/
147	static void usbProxLinuxUrbUnplugged(PUSBPROXYDEV pProxyDev);
148	static DECLCALLBACK(int) usbProxyLinuxClaimInterface(PUSBPROXYDEV pProxyDev, int iIf);
149	static DECLCALLBACK(int) usbProxyLinuxReleaseInterface(PUSBPROXYDEV pProxyDev, int iIf);
150
151
152	/**
153	* Wrapper for the ioctl call.
154	*
155	* This wrapper will repeat the call if we get an EINTR or EAGAIN. It can also
156	* handle ENODEV (detached device) errors.
157	*
158	* @returns whatever ioctl returns.
159	* @param pProxyDev The proxy device.
160	* @param iCmd The ioctl command / function.
161	* @param pvArg The ioctl argument / data.
162	* @param fHandleNoDev Whether to handle ENODEV.
163	* @param cTries The number of retries. Use UINT32_MAX for (kind of) indefinite retries.
164	* @internal
165	*/
166	static int usbProxyLinuxDoIoCtl(PUSBPROXYDEV pProxyDev, unsigned long iCmd, void *pvArg, bool fHandleNoDev, uint32_t cTries)
167	{
168	int rc;
169	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
170	do
171	{
172	do
173	{
174	rc = ioctl(RTFileToNative(pDevLnx->hFile), iCmd, pvArg);
175	if (rc >= 0)
176	return rc;
177	} while (errno == EINTR);
178
179	if (errno == ENODEV && fHandleNoDev)
180	{
181	usbProxLinuxUrbUnplugged(pProxyDev);
182	Log(("usb-linux: ENODEV -> unplugged. pProxyDev=%s\n", usbProxyGetName(pProxyDev)));
183	errno = ENODEV;
184	break;
185	}
186	if (errno != EAGAIN)
187	break;
188	} while (cTries-- > 0);
189
190	return rc;
191	}
192
193
194	/**
195	* The device has been unplugged.
196	* Cancel all in-flight URBs and put them up for reaping.
197	*/
198	static void usbProxLinuxUrbUnplugged(PUSBPROXYDEV pProxyDev)
199	{
200	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
201
202	/*
203	* Shoot down all flying URBs.
204	*/
205	RTCritSectEnter(&pDevLnx->CritSect);
206	pProxyDev->fDetached = true;
207
208	PUSBPROXYURBLNX pUrbLnx;
209	PUSBPROXYURBLNX pUrbLnxNext;
210	RTListForEachSafe(&pDevLnx->ListInFlight, pUrbLnx, pUrbLnxNext, USBPROXYURBLNX, NodeList)
211	{
212	if (!pUrbLnx->fDiscarded)
213	{
214	pUrbLnx->fDiscarded = true;
215	/* Cancel the URB. It will be reaped normally. */
216	ioctl(RTFileToNative(pDevLnx->hFile), USBDEVFS_DISCARDURB, &pUrbLnx->KUrb);
217	if (!pUrbLnx->KUrb.status)
218	pUrbLnx->KUrb.status = -ENODEV;
219	}
220	}
221
222	RTCritSectLeave(&pDevLnx->CritSect);
223	}
224
225
226	/**
227	* Set the connect state seen by kernel drivers
228	* @internal
229	*/
230	static void usbProxyLinuxSetConnected(PUSBPROXYDEV pProxyDev, int iIf, bool fConnect, bool fQuiet)
231	{
232	if ( iIf >= 32
233	\|\| !(pProxyDev->fMaskedIfs & RT_BIT(iIf)))
234	{
235	struct usbdevfs_ioctl IoCtl;
236	if (!fQuiet)
237	LogFlow(("usbProxyLinuxSetConnected: pProxyDev=%s iIf=%#x fConnect=%s\n",
238	usbProxyGetName(pProxyDev), iIf, fConnect ? "true" : "false"));
239
240	IoCtl.ifno = iIf;
241	IoCtl.ioctl_code = fConnect ? USBDEVFS_CONNECT : USBDEVFS_DISCONNECT;
242	IoCtl.data = NULL;
243	if ( usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_IOCTL, &IoCtl, true, UINT32_MAX)
244	&& !fQuiet)
245	Log(("usbProxyLinuxSetConnected: failure, errno=%d. pProxyDev=%s\n",
246	errno, usbProxyGetName(pProxyDev)));
247	}
248	}
249
250
251	/**
252	* Links the given URB into the in flight list.
253	*
254	* @returns nothing.
255	* @param pDevLnx The proxy device instance - Linux specific data.
256	* @param pUrbLnx The URB to link into the in flight list.
257	*/
258	static void usbProxyLinuxUrbLinkInFlight(PUSBPROXYDEVLNX pDevLnx, PUSBPROXYURBLNX pUrbLnx)
259	{
260	LogFlowFunc(("pDevLnx=%p pUrbLnx=%p\n", pDevLnx, pUrbLnx));
261	Assert(RTCritSectIsOwner(&pDevLnx->CritSect));
262	Assert(!pUrbLnx->pSplitHead \|\| pUrbLnx->pSplitHead == pUrbLnx);
263	RTListAppend(&pDevLnx->ListInFlight, &pUrbLnx->NodeList);
264	}
265
266	/**
267	* Unlinks the given URB from the in flight list.
268	* @returns nothing.
269	* @param pDevLnx The proxy device instance - Linux specific data.
270	* @param pUrbLnx The URB to link into the in flight list.
271	*/
272	static void usbProxyLinuxUrbUnlinkInFlight(PUSBPROXYDEVLNX pDevLnx, PUSBPROXYURBLNX pUrbLnx)
273	{
274	LogFlowFunc(("pDevLnx=%p pUrbLnx=%p\n", pDevLnx, pUrbLnx));
275	RTCritSectEnter(&pDevLnx->CritSect);
276
277	/*
278	* Remove from the active list.
279	*/
280	Assert(!pUrbLnx->pSplitHead \|\| pUrbLnx->pSplitHead == pUrbLnx);
281
282	RTListNodeRemove(&pUrbLnx->NodeList);
283
284	RTCritSectLeave(&pDevLnx->CritSect);
285	}
286
287	/**
288	* Allocates a linux URB request structure.
289	* @returns Pointer to an active URB request.
290	* @returns NULL on failure.
291	* @param pProxyDev The proxy device instance.
292	* @param pSplitHead The split list head if allocating for a split list.
293	*/
294	static PUSBPROXYURBLNX usbProxyLinuxUrbAlloc(PUSBPROXYDEV pProxyDev, PUSBPROXYURBLNX pSplitHead)
295	{
296	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
297	PUSBPROXYURBLNX pUrbLnx;
298
299	LogFlowFunc(("pProxyDev=%p pSplitHead=%p\n", pProxyDev, pSplitHead));
300
301	RTCritSectEnter(&pDevLnx->CritSect);
302
303	/*
304	* Try remove a linux URB from the free list, if none there allocate a new one.
305	*/
306	pUrbLnx = RTListGetFirst(&pDevLnx->ListFree, USBPROXYURBLNX, NodeList);
307	if (pUrbLnx)
308	{
309	RTListNodeRemove(&pUrbLnx->NodeList);
310	RTCritSectLeave(&pDevLnx->CritSect);
311	}
312	else
313	{
314	RTCritSectLeave(&pDevLnx->CritSect);
315	pUrbLnx = (PUSBPROXYURBLNX)RTMemAlloc(sizeof(*pUrbLnx));
316	if (!pUrbLnx)
317	return NULL;
318	}
319
320	pUrbLnx->pSplitHead = pSplitHead;
321	pUrbLnx->pSplitNext = NULL;
322	pUrbLnx->fCanceledBySubmit = false;
323	pUrbLnx->fSplitElementReaped = false;
324	pUrbLnx->fDiscarded = false;
325	LogFlowFunc(("returns pUrbLnx=%p\n", pUrbLnx));
326	return pUrbLnx;
327	}
328
329
330	/**
331	* Frees a linux URB request structure.
332	*
333	* @param pProxyDev The proxy device instance.
334	* @param pUrbLnx The linux URB to free.
335	*/
336	static void usbProxyLinuxUrbFree(PUSBPROXYDEV pProxyDev, PUSBPROXYURBLNX pUrbLnx)
337	{
338	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
339
340	LogFlowFunc(("pProxyDev=%p pUrbLnx=%p\n", pProxyDev, pUrbLnx));
341
342	/*
343	* Link it into the free list.
344	*/
345	RTCritSectEnter(&pDevLnx->CritSect);
346	RTListAppend(&pDevLnx->ListFree, &pUrbLnx->NodeList);
347	RTCritSectLeave(&pDevLnx->CritSect);
348	}
349
350
351	/**
352	* Frees split list of a linux URB request structure.
353	*
354	* @param pProxyDev The proxy device instance.
355	* @param pUrbLnx A linux URB to in the split list to be freed.
356	*/
357	static void usbProxyLinuxUrbFreeSplitList(PUSBPROXYDEV pProxyDev, PUSBPROXYURBLNX pUrbLnx)
358	{
359	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
360
361	LogFlowFunc(("pProxyDev=%p pUrbLnx=%p\n", pProxyDev, pUrbLnx));
362
363	RTCritSectEnter(&pDevLnx->CritSect);
364
365	pUrbLnx = pUrbLnx->pSplitHead;
366	Assert(pUrbLnx);
367	while (pUrbLnx)
368	{
369	PUSBPROXYURBLNX pFree = pUrbLnx;
370	pUrbLnx = pUrbLnx->pSplitNext;
371	Assert(pFree->pSplitHead);
372	pFree->pSplitHead = pFree->pSplitNext = NULL;
373	usbProxyLinuxUrbFree(pProxyDev, pFree);
374	}
375
376	RTCritSectLeave(&pDevLnx->CritSect);
377	}
378
379
380	/**
381	* This finds the device in the /proc/bus/usb/bus/addr file and finds
382	* the config with an asterix.
383	*
384	* @returns The Cfg#.
385	* @returns -1 if no active config.
386	* @param pProxyDev The proxy device instance.
387	* @param pszDevNode The path to the device. We infere the location of
388	* the devices file, which bus and device number we're
389	* looking for.
390	* @param piFirstCfg The first configuration. (optional)
391	* @internal
392	*/
393	static int usbProxyLinuxFindActiveConfigUsbfs(PUSBPROXYDEV pProxyDev, const char pszDevNode, int piFirstCfg)
394	{
395	RT_NOREF(pProxyDev);
396
397	/*
398	* Set return defaults.
399	*/
400	int iActiveCfg = -1;
401	if (piFirstCfg)
402	*piFirstCfg = 1;
403
404	/*
405	* Parse the usbfs device node path and turn it into a path to the "devices" file,
406	* picking up the device number and bus along the way.
407	*/
408	size_t cchDevNode = strlen(pszDevNode);
409	char pszDevices = (char )RTMemDupEx(pszDevNode, cchDevNode, sizeof("devices"));
410	AssertReturn(pszDevices, iActiveCfg);
411
412	/* the device number */
413	char *psz = pszDevices + cchDevNode;
414	while (*psz != '/')
415	psz--;
416	Assert(pszDevices < psz);
417	uint32_t uDev;
418	int rc = RTStrToUInt32Ex(psz + 1, NULL, 10, &uDev);
419	if (RT_SUCCESS(rc))
420	{
421	/* the bus number */
422	*psz-- = '\0';
423	while (*psz != '/')
424	psz--;
425	Assert(pszDevices < psz);
426	uint32_t uBus;
427	rc = RTStrToUInt32Ex(psz + 1, NULL, 10, &uBus);
428	if (RT_SUCCESS(rc))
429	{
430	strcpy(psz + 1, "devices");
431
432	/*
433	* Open and scan the devices file.
434	* We're ASSUMING that each device starts off with a 'T:' line.
435	*/
436	PRTSTREAM pFile;
437	rc = RTStrmOpen(pszDevices, "r", &pFile);
438	if (RT_SUCCESS(rc))
439	{
440	char szLine[1024];
441	while (RT_SUCCESS(RTStrmGetLine(pFile, szLine, sizeof(szLine))))
442	{
443	/* we're only interested in 'T:' lines. */
444	psz = RTStrStripL(szLine);
445	if (psz[0] != 'T' \|\| psz[1] != ':')
446	continue;
447
448	/* Skip ahead to 'Bus' and compare */
449	psz = RTStrStripL(psz + 2); Assert(!strncmp(psz, RT_STR_TUPLE("Bus=")));
450	psz = RTStrStripL(psz + 4);
451	char *pszNext;
452	uint32_t u;
453	rc = RTStrToUInt32Ex(psz, &pszNext, 10, &u); AssertRC(rc);
454	if (RT_FAILURE(rc))
455	continue;
456	if (u != uBus)
457	continue;
458
459	/* Skip ahead to 'Dev#' and compare */
460	psz = strstr(psz, "Dev#="); Assert(psz);
461	if (!psz)
462	continue;
463	psz = RTStrStripL(psz + 5);
464	rc = RTStrToUInt32Ex(psz, &pszNext, 10, &u); AssertRC(rc);
465	if (RT_FAILURE(rc))
466	continue;
467	if (u != uDev)
468	continue;
469
470	/*
471	* Ok, we've found the device.
472	* Scan until we find a selected configuration, the next device, or EOF.
473	*/
474	while (RT_SUCCESS(RTStrmGetLine(pFile, szLine, sizeof(szLine))))
475	{
476	psz = RTStrStripL(szLine);
477	if (psz[0] == 'T')
478	break;
479	if (psz[0] != 'C' \|\| psz[1] != ':')
480	continue;
481	const bool fActive = psz[2] == '*';
482	if (!fActive && !piFirstCfg)
483	continue;
484
485	/* Get the 'Cfg#' value. */
486	psz = strstr(psz, "Cfg#="); Assert(psz);
487	if (psz)
488	{
489	psz = RTStrStripL(psz + 5);
490	rc = RTStrToUInt32Ex(psz, &pszNext, 10, &u); AssertRC(rc);
491	if (RT_SUCCESS(rc))
492	{
493	if (piFirstCfg)
494	{
495	*piFirstCfg = u;
496	piFirstCfg = NULL;
497	}
498	if (fActive)
499	iActiveCfg = u;
500	}
501	}
502	if (fActive)
503	break;
504	}
505	break;
506	}
507	RTStrmClose(pFile);
508	}
509	}
510	}
511	RTMemFree(pszDevices);
512
513	return iActiveCfg;
514	}
515
516
517	/**
518	* This finds the active configuration from sysfs.
519	*
520	* @returns The Cfg#.
521	* @returns -1 if no active config.
522	* @param pProxyDev The proxy device instance.
523	* @param pszPath The sysfs path for the device.
524	* @param piFirstCfg The first configuration. (optional)
525	* @internal
526	*/
527	static int usbProxyLinuxFindActiveConfigSysfs(PUSBPROXYDEV pProxyDev, const char pszPath, int piFirstCfg)
528	{
529	#ifdef VBOX_USB_WITH_SYSFS
530	if (piFirstCfg != NULL)
531	*piFirstCfg = pProxyDev->paCfgDescs != NULL
532	? pProxyDev->paCfgDescs[0].Core.bConfigurationValue
533	: 1;
534	int64_t bCfg = 0;
535	int rc = RTLinuxSysFsReadIntFile(10, &bCfg, "%s/bConfigurationValue", pszPath);
536	if (RT_FAILURE(rc))
537	bCfg = -1;
538	return (int)bCfg;
539	#else /* !VBOX_USB_WITH_SYSFS */
540	return -1;
541	#endif /* !VBOX_USB_WITH_SYSFS */
542	}
543
544
545	/**
546	* This finds the active configuration.
547	*
548	* @returns The Cfg#.
549	* @returns -1 if no active config.
550	* @param pProxyDev The proxy device instance.
551	* @param pszPath The sysfs path for the device, or the usbfs device
552	* node path.
553	* @param piFirstCfg The first configuration. (optional)
554	* @internal
555	*/
556	static int usbProxyLinuxFindActiveConfig(PUSBPROXYDEV pProxyDev, const char pszPath, int piFirstCfg)
557	{
558	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
559	if (pDevLnx->fUsingSysfs)
560	return usbProxyLinuxFindActiveConfigSysfs(pProxyDev, pszPath, piFirstCfg);
561	return usbProxyLinuxFindActiveConfigUsbfs(pProxyDev, pszPath, piFirstCfg);
562	}
563
564
565	/**
566	* Extracts the Linux file descriptor associated with the kernel USB device.
567	* This is used by rdesktop-vrdp for polling for events.
568	* @returns the FD, or asserts and returns -1 on error
569	* @param pProxyDev The device instance
570	*/
571	RTDECL(int) USBProxyDeviceLinuxGetFD(PUSBPROXYDEV pProxyDev)
572	{
573	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
574	AssertReturn(pDevLnx->hFile != NIL_RTFILE, -1);
575	return RTFileToNative(pDevLnx->hFile);
576	}
577
578
579	/**
580	* Opens the device file.
581	*
582	* @returns VBox status code.
583	* @param pProxyDev The device instance.
584	* @param pszAddress If we are using usbfs, this is the path to the
585	* device. If we are using sysfs, this is a string of
586	* the form "sysfs:<sysfs path>//device:<device node>".
587	* In the second case, the two paths are guaranteed
588	* not to contain the substring "//".
589	* @param pvBackend Backend specific pointer, unused for the linux backend.
590	*/
591	static DECLCALLBACK(int) usbProxyLinuxOpen(PUSBPROXYDEV pProxyDev, const char pszAddress, void pvBackend)
592	{
593	LogFlow(("usbProxyLinuxOpen: pProxyDev=%p pszAddress=%s\n", pProxyDev, pszAddress));
594	const char *pszDevNode;
595	const char *pszPath;
596	size_t cchPath;
597	bool fUsingSysfs;
598
599	/*
600	* Are we using sysfs or usbfs?
601	*/
602	#ifdef VBOX_USB_WITH_SYSFS
603	fUsingSysfs = strncmp(pszAddress, RT_STR_TUPLE("sysfs:")) == 0;
604	if (fUsingSysfs)
605	{
606	pszDevNode = strstr(pszAddress, "//device:");
607	if (!pszDevNode)
608	{
609	LogRel(("usbProxyLinuxOpen: Invalid device address: '%s'\n", pszAddress));
610	return VERR_INVALID_PARAMETER;
611	}
612
613	pszPath = pszAddress + sizeof("sysfs:") - 1;
614	cchPath = pszDevNode - pszPath;
615	pszDevNode += sizeof("//device:") - 1;
616	}
617	else
618	#endif /* VBOX_USB_WITH_SYSFS */
619	{
620	#ifndef VBOX_USB_WITH_SYSFS
621	fUsingSysfs = false;
622	#endif
623	pszPath = pszDevNode = pszAddress;
624	cchPath = strlen(pszPath);
625	}
626
627	/*
628	* Try open the device node.
629	*/
630	RTFILE hFile;
631	int rc = RTFileOpen(&hFile, pszDevNode, RTFILE_O_READWRITE \| RTFILE_O_OPEN \| RTFILE_O_DENY_NONE);
632	if (RT_SUCCESS(rc))
633	{
634	/*
635	* Initialize the linux backend data.
636	*/
637	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
638
639	RTListInit(&pDevLnx->ListFree);
640	RTListInit(&pDevLnx->ListInFlight);
641	pDevLnx->pszPath = RTStrDupN(pszPath, cchPath);
642	if (pDevLnx->pszPath)
643	{
644	rc = RTPipeCreate(&pDevLnx->hPipeWakeupR, &pDevLnx->hPipeWakeupW, 0);
645	if (RT_SUCCESS(rc))
646	{
647	pDevLnx->fUsingSysfs = fUsingSysfs;
648	pDevLnx->hFile = hFile;
649	pDevLnx->fClaimedIfsMask = 0;
650	rc = RTCritSectInit(&pDevLnx->CritSect);
651	if (RT_SUCCESS(rc))
652	{
653	LogFlow(("usbProxyLinuxOpen(%p, %s): returns successfully File=%RTfile iActiveCfg=%d\n",
654	pProxyDev, pszAddress, pDevLnx->hFile, pProxyDev->iActiveCfg));
655
656	return VINF_SUCCESS;
657	}
658	RTPipeClose(pDevLnx->hPipeWakeupR);
659	RTPipeClose(pDevLnx->hPipeWakeupW);
660	}
661	}
662	else
663	rc = VERR_NO_MEMORY;
664
665	RTFileClose(hFile);
666	}
667	else if (rc == VERR_ACCESS_DENIED)
668	rc = VERR_VUSB_USBFS_PERMISSION;
669
670	Log(("usbProxyLinuxOpen(%p, %s) failed, rc=%s!\n", pProxyDev, pszAddress,
671	RTErrGetShort(rc)));
672
673	NOREF(pvBackend);
674	return rc;
675	}
676
677
678	/**
679	* Claims all the interfaces and figures out the
680	* current configuration.
681	*
682	* @returns VINF_SUCCESS.
683	* @param pProxyDev The proxy device.
684	*/
685	static DECLCALLBACK(int) usbProxyLinuxInit(PUSBPROXYDEV pProxyDev)
686	{
687	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
688
689	/*
690	* Brute force rulez.
691	* usbProxyLinuxSetConnected check for masked interfaces.
692	*/
693	unsigned iIf;
694	for (iIf = 0; iIf < 256; iIf++)
695	usbProxyLinuxSetConnected(pProxyDev, iIf, false, true);
696
697	/*
698	* Determine the active configuration.
699	*
700	* If there isn't any active configuration, we will get EHOSTUNREACH (113) errors
701	* when trying to read the device descriptors in usbProxyDevCreate. So, we'll make
702	* the first one active (usually 1) then.
703	*/
704	pProxyDev->cIgnoreSetConfigs = 1;
705	int iFirstCfg;
706	pProxyDev->iActiveCfg = usbProxyLinuxFindActiveConfig(pProxyDev, pDevLnx->pszPath, &iFirstCfg);
707	if (pProxyDev->iActiveCfg == -1)
708	{
709	usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_SETCONFIGURATION, &iFirstCfg, false, UINT32_MAX);
710	pProxyDev->iActiveCfg = usbProxyLinuxFindActiveConfig(pProxyDev, pDevLnx->pszPath, NULL);
711	Log(("usbProxyLinuxInit: No active config! Tried to set %d: iActiveCfg=%d\n", iFirstCfg, pProxyDev->iActiveCfg));
712	}
713	else
714	Log(("usbProxyLinuxInit(%p): iActiveCfg=%d\n", pProxyDev, pProxyDev->iActiveCfg));
715	return VINF_SUCCESS;
716	}
717
718
719	/**
720	* Closes the proxy device.
721	*/
722	static DECLCALLBACK(void) usbProxyLinuxClose(PUSBPROXYDEV pProxyDev)
723	{
724	LogFlow(("usbProxyLinuxClose: pProxyDev=%s\n", usbProxyGetName(pProxyDev)));
725	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
726	AssertPtrReturnVoid(pDevLnx);
727
728	/*
729	* Try put the device in a state which linux can cope with before we release it.
730	* Resetting it would be a nice start, although we must remember
731	* that it might have been disconnected...
732	*
733	* Don't reset if we're masking interfaces or if construction failed.
734	*/
735	if (pProxyDev->fInited)
736	{
737	/* ASSUMES: thread == EMT */
738	if ( pProxyDev->fMaskedIfs
739	\|\| !usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_RESET, NULL, false, 10))
740	{
741	/* Connect drivers. */
742	unsigned iIf;
743	for (iIf = 0; iIf < 256; iIf++)
744	usbProxyLinuxSetConnected(pProxyDev, iIf, true, true);
745	LogRel(("USB: Successfully reset device pProxyDev=%s\n", usbProxyGetName(pProxyDev)));
746	}
747	else if (errno != ENODEV)
748	LogRel(("USB: Reset failed, errno=%d, pProxyDev=%s.\n", errno, usbProxyGetName(pProxyDev)));
749	else /* This will happen if device was detached. */
750	Log(("USB: Reset failed, errno=%d (ENODEV), pProxyDev=%s.\n", errno, usbProxyGetName(pProxyDev)));
751	}
752
753	/*
754	* Now we can free all the resources and close the device.
755	*/
756	RTCritSectDelete(&pDevLnx->CritSect);
757
758	PUSBPROXYURBLNX pUrbLnx;
759	PUSBPROXYURBLNX pUrbLnxNext;
760	RTListForEachSafe(&pDevLnx->ListInFlight, pUrbLnx, pUrbLnxNext, USBPROXYURBLNX, NodeList)
761	{
762	RTListNodeRemove(&pUrbLnx->NodeList);
763
764	if ( usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_DISCARDURB, &pUrbLnx->KUrb, false, UINT32_MAX)
765	&& errno != ENODEV
766	&& errno != ENOENT)
767	AssertMsgFailed(("errno=%d\n", errno));
768
769	if (pUrbLnx->pSplitHead)
770	{
771	PUSBPROXYURBLNX pCur = pUrbLnx->pSplitNext;
772	while (pCur)
773	{
774	PUSBPROXYURBLNX pFree = pCur;
775	pCur = pFree->pSplitNext;
776	if ( !pFree->fSplitElementReaped
777	&& usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_DISCARDURB, &pFree->KUrb, false, UINT32_MAX)
778	&& errno != ENODEV
779	&& errno != ENOENT)
780	AssertMsgFailed(("errno=%d\n", errno));
781	RTMemFree(pFree);
782	}
783	}
784	else
785	Assert(!pUrbLnx->pSplitNext);
786	RTMemFree(pUrbLnx);
787	}
788
789	RTListForEachSafe(&pDevLnx->ListFree, pUrbLnx, pUrbLnxNext, USBPROXYURBLNX, NodeList)
790	{
791	RTListNodeRemove(&pUrbLnx->NodeList);
792	RTMemFree(pUrbLnx);
793	}
794
795	RTFileClose(pDevLnx->hFile);
796	pDevLnx->hFile = NIL_RTFILE;
797
798	RTPipeClose(pDevLnx->hPipeWakeupR);
799	RTPipeClose(pDevLnx->hPipeWakeupW);
800
801	RTStrFree(pDevLnx->pszPath);
802
803	LogFlow(("usbProxyLinuxClose: returns\n"));
804	}
805
806
807	/** @interface_method_impl{USBPROXYBACK,pfnReset} */
808	static DECLCALLBACK(int) usbProxyLinuxReset(PUSBPROXYDEV pProxyDev, bool fResetOnLinux)
809	{
810	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
811	RT_NOREF(fResetOnLinux);
812	Assert(!pProxyDev->fMaskedIfs);
813	LogFlow(("usbProxyLinuxReset: pProxyDev=%s\n", usbProxyGetName(pProxyDev)));
814
815	uint32_t fActiveIfsMask = pDevLnx->fClaimedIfsMask;
816	unsigned i;
817
818	/*
819	* Before reset, release claimed interfaces. This less than obvious move
820	* prevents Linux from rebinding in-kernel drivers to the device after reset.
821	*/
822	for (i = 0; i < (sizeof(fActiveIfsMask) * 8); ++i)
823	{
824	if (fActiveIfsMask & RT_BIT(i))
825	{
826	usbProxyLinuxReleaseInterface(pProxyDev, i);
827	}
828	}
829
830	if (usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_RESET, NULL, false, 10))
831	{
832	int rc = errno;
833	LogRel(("usb-linux: Reset failed, rc=%s errno=%d.\n",
834	RTErrGetShort(RTErrConvertFromErrno(rc)), rc));
835	pProxyDev->iActiveCfg = -1;
836	return RTErrConvertFromErrno(rc);
837	}
838
839	/*
840	* Now reclaim previously claimed interfaces. If that doesn't work, let's hope
841	* the guest/VUSB can recover from that. Can happen if reset changes configuration.
842	*/
843	for (i = 0; i < (sizeof(fActiveIfsMask) * 8); ++i)
844	{
845	if (fActiveIfsMask & RT_BIT(i))
846	{
847	usbProxyLinuxClaimInterface(pProxyDev, i);
848	}
849	}
850
851	/* find the active config - damn annoying. */
852	pProxyDev->iActiveCfg = usbProxyLinuxFindActiveConfig(pProxyDev, pDevLnx->pszPath, NULL);
853	LogFlow(("usbProxyLinuxReset: returns successfully iActiveCfg=%d\n", pProxyDev->iActiveCfg));
854
855	pProxyDev->cIgnoreSetConfigs = 2;
856	return VINF_SUCCESS;
857	}
858
859
860	/**
861	* SET_CONFIGURATION.
862	*
863	* The caller makes sure that it's not called first time after open or reset
864	* with the active interface.
865	*
866	* @returns success indicator.
867	* @param pProxyDev The device instance data.
868	* @param iCfg The configuration to set.
869	*/
870	static DECLCALLBACK(int) usbProxyLinuxSetConfig(PUSBPROXYDEV pProxyDev, int iCfg)
871	{
872	LogFlow(("usbProxyLinuxSetConfig: pProxyDev=%s cfg=%#x\n",
873	usbProxyGetName(pProxyDev), iCfg));
874
875	if (usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_SETCONFIGURATION, &iCfg, true, UINT32_MAX))
876	{
877	Log(("usb-linux: Set configuration. errno=%d\n", errno));
878	return RTErrConvertFromErrno(errno);
879	}
880	return VINF_SUCCESS;
881	}
882
883
884	/**
885	* Claims an interface.
886	* @returns success indicator.
887	*/
888	static DECLCALLBACK(int) usbProxyLinuxClaimInterface(PUSBPROXYDEV pProxyDev, int iIf)
889	{
890	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
891
892	LogFlow(("usbProxyLinuxClaimInterface: pProxyDev=%s ifnum=%#x\n", usbProxyGetName(pProxyDev), iIf));
893	usbProxyLinuxSetConnected(pProxyDev, iIf, false, false);
894
895	if (usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_CLAIMINTERFACE, &iIf, true, UINT32_MAX))
896	{
897	pDevLnx->fClaimedIfsMask &= ~RT_BIT(iIf);
898	LogRel(("usb-linux: Claim interface. errno=%d pProxyDev=%s\n", errno, usbProxyGetName(pProxyDev)));
899	return RTErrConvertFromErrno(errno);
900	}
901	pDevLnx->fClaimedIfsMask \|= RT_BIT(iIf);
902	return VINF_SUCCESS;
903	}
904
905
906	/**
907	* Releases an interface.
908	* @returns success indicator.
909	*/
910	static DECLCALLBACK(int) usbProxyLinuxReleaseInterface(PUSBPROXYDEV pProxyDev, int iIf)
911	{
912	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
913
914	LogFlow(("usbProxyLinuxReleaseInterface: pProxyDev=%s ifnum=%#x\n", usbProxyGetName(pProxyDev), iIf));
915
916	if (usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_RELEASEINTERFACE, &iIf, true, UINT32_MAX))
917	{
918	LogRel(("usb-linux: Release interface, errno=%d. pProxyDev=%s\n", errno, usbProxyGetName(pProxyDev)));
919	return RTErrConvertFromErrno(errno);
920	}
921	pDevLnx->fClaimedIfsMask &= ~RT_BIT(iIf);
922	return VINF_SUCCESS;
923	}
924
925
926	/**
927	* SET_INTERFACE.
928	*
929	* @returns success indicator.
930	*/
931	static DECLCALLBACK(int) usbProxyLinuxSetInterface(PUSBPROXYDEV pProxyDev, int iIf, int iAlt)
932	{
933	struct usbdevfs_setinterface SetIf;
934	LogFlow(("usbProxyLinuxSetInterface: pProxyDev=%p iIf=%#x iAlt=%#x\n", pProxyDev, iIf, iAlt));
935
936	SetIf.interface = iIf;
937	SetIf.altsetting = iAlt;
938	if (usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_SETINTERFACE, &SetIf, true, UINT32_MAX))
939	{
940	Log(("usb-linux: Set interface, errno=%d. pProxyDev=%s\n", errno, usbProxyGetName(pProxyDev)));
941	return RTErrConvertFromErrno(errno);
942	}
943	return VINF_SUCCESS;
944	}
945
946
947	/**
948	* Clears the halted endpoint 'EndPt'.
949	*/
950	static DECLCALLBACK(int) usbProxyLinuxClearHaltedEp(PUSBPROXYDEV pProxyDev, unsigned int EndPt)
951	{
952	LogFlow(("usbProxyLinuxClearHaltedEp: pProxyDev=%s EndPt=%u\n", usbProxyGetName(pProxyDev), EndPt));
953
954	if (usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_CLEAR_HALT, &EndPt, true, UINT32_MAX))
955	{
956	/*
957	* Unfortunately this doesn't work on control pipes.
958	* Windows doing this on the default endpoint and possibly other pipes too,
959	* so we'll feign success for ENOENT errors.
960	*/
961	if (errno == ENOENT)
962	{
963	Log(("usb-linux: clear_halted_ep failed errno=%d. pProxyDev=%s ep=%d - IGNORED\n",
964	errno, usbProxyGetName(pProxyDev), EndPt));
965	return VINF_SUCCESS;
966	}
967	Log(("usb-linux: clear_halted_ep failed errno=%d. pProxyDev=%s ep=%d\n",
968	errno, usbProxyGetName(pProxyDev), EndPt));
969	return RTErrConvertFromErrno(errno);
970	}
971	return VINF_SUCCESS;
972	}
973
974
975	/**
976	* Setup packet byte-swapping routines.
977	*/
978	static void usbProxyLinuxUrbSwapSetup(PVUSBSETUP pSetup)
979	{
980	pSetup->wValue = RT_H2LE_U16(pSetup->wValue);
981	pSetup->wIndex = RT_H2LE_U16(pSetup->wIndex);
982	pSetup->wLength = RT_H2LE_U16(pSetup->wLength);
983	}
984
985
986	/**
987	* Clean up after a failed URB submit.
988	*/
989	static void usbProxyLinuxCleanupFailedSubmit(PUSBPROXYDEV pProxyDev, PUSBPROXYURBLNX pUrbLnx, PUSBPROXYURBLNX pCur, PVUSBURB pUrb, bool *pfUnplugged)
990	{
991	if (pUrb->enmType == VUSBXFERTYPE_MSG)
992	usbProxyLinuxUrbSwapSetup((PVUSBSETUP)pUrb->abData);
993
994	/* discard and reap later (walking with pUrbLnx). */
995	if (pUrbLnx != pCur)
996	{
997	for (;;)
998	{
999	pUrbLnx->fCanceledBySubmit = true;
1000	pUrbLnx->KUrb.usercontext = NULL;
1001	if (usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_DISCARDURB, &pUrbLnx->KUrb, false, UINT32_MAX))
1002	{
1003	if (errno == ENODEV)
1004	*pfUnplugged = true;
1005	else if (errno == ENOENT)
1006	pUrbLnx->fSplitElementReaped = true;
1007	else
1008	LogRel(("USB: Failed to discard %p! errno=%d (pUrb=%p)\n", pUrbLnx->KUrb.usercontext, errno, pUrb)); /* serious! */
1009	}
1010	if (pUrbLnx->pSplitNext == pCur)
1011	{
1012	pUrbLnx->pSplitNext = NULL;
1013	break;
1014	}
1015	pUrbLnx = pUrbLnx->pSplitNext; Assert(pUrbLnx);
1016	}
1017	}
1018
1019	/* free the unsubmitted ones. */
1020	while (pCur)
1021	{
1022	PUSBPROXYURBLNX pFree = pCur;
1023	pCur = pCur->pSplitNext;
1024	usbProxyLinuxUrbFree(pProxyDev, pFree);
1025	}
1026
1027	/* send unplug event if we failed with ENODEV originally. */
1028	if (*pfUnplugged)
1029	usbProxLinuxUrbUnplugged(pProxyDev);
1030	}
1031
1032	/**
1033	* Submit one URB through the usbfs IOCTL interface, with
1034	* retries
1035	*
1036	* @returns VBox status code.
1037	*/
1038	static int usbProxyLinuxSubmitURB(PUSBPROXYDEV pProxyDev, PUSBPROXYURBLNX pCur, PVUSBURB pUrb, bool *pfUnplugged)
1039	{
1040	RT_NOREF(pUrb);
1041	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
1042	unsigned cTries = 0;
1043
1044	while (ioctl(RTFileToNative(pDevLnx->hFile), USBDEVFS_SUBMITURB, &pCur->KUrb))
1045	{
1046	if (errno == EINTR)
1047	continue;
1048	if (errno == ENODEV)
1049	{
1050	Log(("usbProxyLinuxSubmitURB: ENODEV -> unplugged. pProxyDev=%s\n", usbProxyGetName(pProxyDev)));
1051	*pfUnplugged = true;
1052	return RTErrConvertFromErrno(errno);
1053	}
1054
1055	Log(("usb-linux: Submit URB %p -> %d!!! type=%d ep=%#x buffer_length=%#x cTries=%d\n",
1056	pUrb, errno, pCur->KUrb.type, pCur->KUrb.endpoint, pCur->KUrb.buffer_length, cTries));
1057	if (errno != EBUSY && ++cTries < 3) /* this doesn't work for the floppy :/ */
1058	continue;
1059
1060	return RTErrConvertFromErrno(errno);
1061	}
1062	return VINF_SUCCESS;
1063	}
1064
1065	/** The split size. 16K in known Linux kernel versions. */
1066	#define SPLIT_SIZE 0x4000
1067
1068	/**
1069	* Create a URB fragment of up to SPLIT_SIZE size and hook it
1070	* into the list of fragments.
1071	*
1072	* @returns pointer to newly allocated URB fragment or NULL.
1073	*/
1074	static PUSBPROXYURBLNX usbProxyLinuxSplitURBFragment(PUSBPROXYDEV pProxyDev, PUSBPROXYURBLNX pHead, PUSBPROXYURBLNX pCur)
1075	{
1076	PUSBPROXYURBLNX pNew;
1077	uint32_t cbLeft = pCur->cbSplitRemaining;
1078	uint8_t pb = (uint8_t )pCur->KUrb.buffer;
1079
1080	LogFlowFunc(("pProxyDev=%p pHead=%p pCur=%p\n", pProxyDev, pHead, pCur));
1081
1082	Assert(cbLeft != 0);
1083	pNew = pCur->pSplitNext = usbProxyLinuxUrbAlloc(pProxyDev, pHead);
1084	if (!pNew)
1085	{
1086	usbProxyLinuxUrbFreeSplitList(pProxyDev, pHead);
1087	return NULL;
1088	}
1089	Assert(pNew->pSplitHead == pHead);
1090	Assert(pNew->pSplitNext == NULL);
1091
1092	pNew->KUrb = pHead->KUrb;
1093	pNew->KUrb.buffer = pb + pCur->KUrb.buffer_length;
1094	pNew->KUrb.buffer_length = RT_MIN(cbLeft, SPLIT_SIZE);
1095	pNew->KUrb.actual_length = 0;
1096
1097	cbLeft -= pNew->KUrb.buffer_length;
1098	Assert(cbLeft < INT32_MAX);
1099	pNew->cbSplitRemaining = cbLeft;
1100	LogFlowFunc(("returns pNew=%p\n", pNew));
1101	return pNew;
1102	}
1103
1104	/**
1105	* Try splitting up a VUSB URB into smaller URBs which the
1106	* linux kernel (usbfs) can deal with.
1107	*
1108	* NB: For ShortOK reads things get a little tricky - we don't
1109	* know how much data is going to arrive and not all the
1110	* fragment URBs might be filled. We can only safely set up one
1111	* URB at a time -> worse performance but correct behaviour.
1112	*
1113	* @returns VBox status code.
1114	* @param pProxyDev The proxy device.
1115	* @param pUrbLnx The linux URB which was rejected because of being too big.
1116	* @param pUrb The VUSB URB.
1117	*/
1118	static int usbProxyLinuxUrbQueueSplit(PUSBPROXYDEV pProxyDev, PUSBPROXYURBLNX pUrbLnx, PVUSBURB pUrb)
1119	{
1120	/*
1121	* Split it up into SPLIT_SIZE sized blocks.
1122	*/
1123	const unsigned cKUrbs = (pUrb->cbData + SPLIT_SIZE - 1) / SPLIT_SIZE;
1124	LogFlow(("usbProxyLinuxUrbQueueSplit: pUrb=%p cKUrbs=%d cbData=%d\n", pUrb, cKUrbs, pUrb->cbData));
1125
1126	uint32_t cbLeft = pUrb->cbData;
1127	uint8_t *pb = &pUrb->abData[0];
1128
1129	/* the first one (already allocated) */
1130	switch (pUrb->enmType)
1131	{
1132	default: /* shut up gcc */
1133	case VUSBXFERTYPE_BULK: pUrbLnx->KUrb.type = USBDEVFS_URB_TYPE_BULK; break;
1134	case VUSBXFERTYPE_INTR: pUrbLnx->KUrb.type = USBDEVFS_URB_TYPE_INTERRUPT; break;
1135	case VUSBXFERTYPE_MSG: pUrbLnx->KUrb.type = USBDEVFS_URB_TYPE_CONTROL; break;
1136	case VUSBXFERTYPE_ISOC:
1137	AssertMsgFailed(("We can't split isochronous URBs!\n"));
1138	usbProxyLinuxUrbFree(pProxyDev, pUrbLnx);
1139	return VERR_INVALID_PARAMETER; /** @todo Better status code. */
1140	}
1141	pUrbLnx->KUrb.endpoint = pUrb->EndPt;
1142	if (pUrb->enmDir == VUSBDIRECTION_IN)
1143	pUrbLnx->KUrb.endpoint \|= 0x80;
1144	pUrbLnx->KUrb.flags = 0;
1145	if (pUrb->enmDir == VUSBDIRECTION_IN && pUrb->fShortNotOk)
1146	pUrbLnx->KUrb.flags \|= USBDEVFS_URB_SHORT_NOT_OK;
1147	pUrbLnx->KUrb.status = 0;
1148	pUrbLnx->KUrb.buffer = pb;
1149	pUrbLnx->KUrb.buffer_length = RT_MIN(cbLeft, SPLIT_SIZE);
1150	pUrbLnx->KUrb.actual_length = 0;
1151	pUrbLnx->KUrb.start_frame = 0;
1152	pUrbLnx->KUrb.number_of_packets = 0;
1153	pUrbLnx->KUrb.error_count = 0;
1154	pUrbLnx->KUrb.signr = 0;
1155	pUrbLnx->KUrb.usercontext = pUrb;
1156	pUrbLnx->pSplitHead = pUrbLnx;
1157	pUrbLnx->pSplitNext = NULL;
1158
1159	PUSBPROXYURBLNX pCur = pUrbLnx;
1160
1161	cbLeft -= pUrbLnx->KUrb.buffer_length;
1162	pUrbLnx->cbSplitRemaining = cbLeft;
1163
1164	int rc = VINF_SUCCESS;
1165	bool fUnplugged = false;
1166	if (pUrb->enmDir == VUSBDIRECTION_IN && !pUrb->fShortNotOk)
1167	{
1168	/* Subsequent fragments will be queued only after the previous fragment is reaped
1169	* and only if necessary.
1170	*/
1171	Log(("usb-linux: Large ShortOK read, only queuing first fragment.\n"));
1172	Assert(pUrbLnx->cbSplitRemaining > 0 && pUrbLnx->cbSplitRemaining < 256 * _1K);
1173	rc = usbProxyLinuxSubmitURB(pProxyDev, pUrbLnx, pUrb, &fUnplugged);
1174	}
1175	else
1176	{
1177	/* the rest. */
1178	unsigned i;
1179	for (i = 1; i < cKUrbs; i++)
1180	{
1181	pCur = usbProxyLinuxSplitURBFragment(pProxyDev, pUrbLnx, pCur);
1182	if (!pCur)
1183	return VERR_NO_MEMORY;
1184	}
1185	Assert(pCur->cbSplitRemaining == 0);
1186
1187	/* Submit the blocks. */
1188	pCur = pUrbLnx;
1189	for (i = 0; i < cKUrbs; i++, pCur = pCur->pSplitNext)
1190	{
1191	rc = usbProxyLinuxSubmitURB(pProxyDev, pCur, pUrb, &fUnplugged);
1192	if (RT_FAILURE(rc))
1193	break;
1194	}
1195	}
1196
1197	if (RT_SUCCESS(rc))
1198	{
1199	pUrb->Dev.pvPrivate = pUrbLnx;
1200	usbProxyLinuxUrbLinkInFlight(USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX), pUrbLnx);
1201	LogFlow(("usbProxyLinuxUrbQueueSplit: ok\n"));
1202	return VINF_SUCCESS;
1203	}
1204
1205	usbProxyLinuxCleanupFailedSubmit(pProxyDev, pUrbLnx, pCur, pUrb, &fUnplugged);
1206	return rc;
1207	}
1208
1209
1210	/**
1211	* @interface_method_impl{USBPROXYBACK,pfnUrbQueue}
1212	*/
1213	static DECLCALLBACK(int) usbProxyLinuxUrbQueue(PUSBPROXYDEV pProxyDev, PVUSBURB pUrb)
1214	{
1215	int rc = VINF_SUCCESS;
1216	unsigned cTries;
1217	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
1218	LogFlow(("usbProxyLinuxUrbQueue: pProxyDev=%s pUrb=%p EndPt=%d cbData=%d\n",
1219	usbProxyGetName(pProxyDev), pUrb, pUrb->EndPt, pUrb->cbData));
1220
1221	/*
1222	* Allocate a linux urb.
1223	*/
1224	PUSBPROXYURBLNX pUrbLnx = usbProxyLinuxUrbAlloc(pProxyDev, NULL);
1225	if (!pUrbLnx)
1226	return VERR_NO_MEMORY;
1227
1228	pUrbLnx->KUrb.endpoint = pUrb->EndPt \| (pUrb->enmDir == VUSBDIRECTION_IN ? 0x80 : 0);
1229	pUrbLnx->KUrb.status = 0;
1230	pUrbLnx->KUrb.flags = 0;
1231	if (pUrb->enmDir == VUSBDIRECTION_IN && pUrb->fShortNotOk)
1232	pUrbLnx->KUrb.flags \|= USBDEVFS_URB_SHORT_NOT_OK;
1233	pUrbLnx->KUrb.buffer = pUrb->abData;
1234	pUrbLnx->KUrb.buffer_length = pUrb->cbData;
1235	pUrbLnx->KUrb.actual_length = 0;
1236	pUrbLnx->KUrb.start_frame = 0;
1237	pUrbLnx->KUrb.number_of_packets = 0;
1238	pUrbLnx->KUrb.error_count = 0;
1239	pUrbLnx->KUrb.signr = 0;
1240	pUrbLnx->KUrb.usercontext = pUrb;
1241
1242	switch (pUrb->enmType)
1243	{
1244	case VUSBXFERTYPE_MSG:
1245	pUrbLnx->KUrb.type = USBDEVFS_URB_TYPE_CONTROL;
1246	if (pUrb->cbData < sizeof(VUSBSETUP))
1247	{
1248	usbProxyLinuxUrbFree(pProxyDev, pUrbLnx);
1249	return VERR_BUFFER_UNDERFLOW;
1250	}
1251	usbProxyLinuxUrbSwapSetup((PVUSBSETUP)pUrb->abData);
1252	LogFlow(("usbProxyLinuxUrbQueue: message\n"));
1253	break;
1254	case VUSBXFERTYPE_BULK:
1255	pUrbLnx->KUrb.type = USBDEVFS_URB_TYPE_BULK;
1256	break;
1257	case VUSBXFERTYPE_ISOC:
1258	pUrbLnx->KUrb.type = USBDEVFS_URB_TYPE_ISO;
1259	pUrbLnx->KUrb.flags \|= USBDEVFS_URB_ISO_ASAP;
1260	pUrbLnx->KUrb.number_of_packets = pUrb->cIsocPkts;
1261	unsigned i;
1262	for (i = 0; i < pUrb->cIsocPkts; i++)
1263	{
1264	#if RT_GNUC_PREREQ(4, 6)
1265	# pragma GCC diagnostic push
1266	# pragma GCC diagnostic ignored "-Warray-bounds"
1267	#endif
1268	pUrbLnx->KUrb.iso_frame_desc[i].length = pUrb->aIsocPkts[i].cb;
1269	pUrbLnx->KUrb.iso_frame_desc[i].actual_length = 0;
1270	pUrbLnx->KUrb.iso_frame_desc[i].status = 0x7fff;
1271	#if RT_GNUC_PREREQ(4, 6)
1272	# pragma GCC diagnostic pop
1273	#endif
1274	}
1275	break;
1276	case VUSBXFERTYPE_INTR:
1277	pUrbLnx->KUrb.type = USBDEVFS_URB_TYPE_INTERRUPT;
1278	break;
1279	default:
1280	rc = VERR_INVALID_PARAMETER; /** @todo better status code. */
1281	}
1282
1283	/*
1284	* We have to serialize access by using the critial section here because this
1285	* thread might be suspended after submitting the URB but before linking it into
1286	* the in flight list. This would get us in trouble when reaping the URB on another
1287	* thread while it isn't in the in flight list.
1288	*
1289	* Linking the URB into the list before submitting it like it was done in the past is not
1290	* possible either because submitting the URB might fail here because the device gets
1291	* detached. The reaper thread gets this event too and might race this thread before we
1292	* can unlink the URB from the active list and the common code might end up freeing
1293	* the common URB structure twice.
1294	*/
1295	RTCritSectEnter(&pDevLnx->CritSect);
1296	/*
1297	* Submit it.
1298	*/
1299	cTries = 0;
1300	while (ioctl(RTFileToNative(pDevLnx->hFile), USBDEVFS_SUBMITURB, &pUrbLnx->KUrb))
1301	{
1302	if (errno == EINTR)
1303	continue;
1304	if (errno == ENODEV)
1305	{
1306	rc = RTErrConvertFromErrno(errno);
1307	Log(("usbProxyLinuxUrbQueue: ENODEV -> unplugged. pProxyDev=%s\n", usbProxyGetName(pProxyDev)));
1308	if (pUrb->enmType == VUSBXFERTYPE_MSG)
1309	usbProxyLinuxUrbSwapSetup((PVUSBSETUP)pUrb->abData);
1310
1311	RTCritSectLeave(&pDevLnx->CritSect);
1312	usbProxyLinuxUrbFree(pProxyDev, pUrbLnx);
1313	usbProxLinuxUrbUnplugged(pProxyDev);
1314	return rc;
1315	}
1316
1317	/*
1318	* usbfs has or used to have a low buffer limit (16KB) in order to prevent
1319	* processes wasting kmalloc'ed memory. It will return EINVAL if break that
1320	* limit, and we'll have to split the VUSB URB up into multiple linux URBs.
1321	*
1322	* Since this is a limit which is subject to change, we cannot check for it
1323	* before submitting the URB. We just have to try and fail.
1324	*/
1325	if ( errno == EINVAL
1326	&& pUrb->cbData >= 8*_1K)
1327	{
1328	rc = usbProxyLinuxUrbQueueSplit(pProxyDev, pUrbLnx, pUrb);
1329	RTCritSectLeave(&pDevLnx->CritSect);
1330	return rc;
1331	}
1332
1333	Log(("usb-linux: Queue URB %p -> %d!!! type=%d ep=%#x buffer_length=%#x cTries=%d\n",
1334	pUrb, errno, pUrbLnx->KUrb.type, pUrbLnx->KUrb.endpoint, pUrbLnx->KUrb.buffer_length, cTries));
1335	if (errno != EBUSY && ++cTries < 3) /* this doesn't work for the floppy :/ */
1336	continue;
1337
1338	RTCritSectLeave(&pDevLnx->CritSect);
1339	rc = RTErrConvertFromErrno(errno);
1340	if (pUrb->enmType == VUSBXFERTYPE_MSG)
1341	usbProxyLinuxUrbSwapSetup((PVUSBSETUP)pUrb->abData);
1342	usbProxyLinuxUrbFree(pProxyDev, pUrbLnx);
1343	return rc;
1344	}
1345
1346	usbProxyLinuxUrbLinkInFlight(pDevLnx, pUrbLnx);
1347	RTCritSectLeave(&pDevLnx->CritSect);
1348
1349	LogFlow(("usbProxyLinuxUrbQueue: ok\n"));
1350	pUrb->Dev.pvPrivate = pUrbLnx;
1351	return rc;
1352	}
1353
1354
1355	/**
1356	* Translate the linux status to a VUSB status.
1357	*
1358	* @remarks see cc_to_error in ohci.h, uhci_map_status in uhci-q.c,
1359	* sitd_complete+itd_complete in ehci-sched.c, and qtd_copy_status in
1360	* ehci-q.c.
1361	*/
1362	static VUSBSTATUS vusbProxyLinuxStatusToVUsbStatus(int iStatus)
1363	{
1364	switch (iStatus)
1365	{
1366	/** @todo VUSBSTATUS_NOT_ACCESSED */
1367	case -EXDEV: /* iso transfer, partial result. */
1368	case 0:
1369	return VUSBSTATUS_OK;
1370
1371	case -EILSEQ:
1372	return VUSBSTATUS_CRC;
1373
1374	case -EREMOTEIO: /* ehci and ohci uses this for underflow error. */
1375	return VUSBSTATUS_DATA_UNDERRUN;
1376	case -EOVERFLOW:
1377	return VUSBSTATUS_DATA_OVERRUN;
1378
1379	case -ETIME:
1380	case -ENODEV:
1381	return VUSBSTATUS_DNR;
1382
1383	//case -ECOMM:
1384	// return VUSBSTATUS_BUFFER_OVERRUN;
1385	//case -ENOSR:
1386	// return VUSBSTATUS_BUFFER_UNDERRUN;
1387
1388	case -EPROTO:
1389	Log(("vusbProxyLinuxStatusToVUsbStatus: DNR/EPPROTO!!\n"));
1390	return VUSBSTATUS_DNR;
1391
1392	case -EPIPE:
1393	Log(("vusbProxyLinuxStatusToVUsbStatus: STALL/EPIPE!!\n"));
1394	return VUSBSTATUS_STALL;
1395
1396	case -ESHUTDOWN:
1397	Log(("vusbProxyLinuxStatusToVUsbStatus: SHUTDOWN!!\n"));
1398	return VUSBSTATUS_STALL;
1399
1400	case -ENOENT:
1401	Log(("vusbProxyLinuxStatusToVUsbStatus: ENOENT!!\n"));
1402	return VUSBSTATUS_STALL;
1403
1404	default:
1405	Log(("vusbProxyLinuxStatusToVUsbStatus: status %d!!\n", iStatus));
1406	return VUSBSTATUS_STALL;
1407	}
1408	}
1409
1410
1411	/**
1412	* Get and translates the linux status to a VUSB status.
1413	*/
1414	static VUSBSTATUS vusbProxyLinuxUrbGetStatus(PUSBPROXYURBLNX pUrbLnx)
1415	{
1416	return vusbProxyLinuxStatusToVUsbStatus(pUrbLnx->KUrb.status);
1417	}
1418
1419
1420	/**
1421	* Reap URBs in-flight on a device.
1422	*
1423	* @returns Pointer to a completed URB.
1424	* @returns NULL if no URB was completed.
1425	* @param pProxyDev The device.
1426	* @param cMillies Number of milliseconds to wait. Use 0 to not wait at all.
1427	*/
1428	static DECLCALLBACK(PVUSBURB) usbProxyLinuxUrbReap(PUSBPROXYDEV pProxyDev, RTMSINTERVAL cMillies)
1429	{
1430	PUSBPROXYURBLNX pUrbLnx = NULL;
1431	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
1432
1433	/*
1434	* Block for requested period.
1435	*
1436	* It seems to me that the path of poll() is shorter and
1437	* involves less semaphores than ioctl() on usbfs. So, we'll
1438	* do a poll regardless of whether cMillies == 0 or not.
1439	*/
1440	if (cMillies)
1441	{
1442	int cMilliesWait = cMillies == RT_INDEFINITE_WAIT ? -1 : cMillies;
1443
1444	for (;;)
1445	{
1446	struct pollfd pfd[2];
1447	pfd[0].fd = RTFileToNative(pDevLnx->hFile);
1448	pfd[0].events = POLLOUT \| POLLWRNORM /* completed async */
1449	\| POLLERR \| POLLHUP /* disconnected */;
1450	pfd[0].revents = 0;
1451
1452	pfd[1].fd = RTPipeToNative(pDevLnx->hPipeWakeupR);
1453	pfd[1].events = POLLIN \| POLLHUP;
1454	pfd[1].revents = 0;
1455
1456	int rc = poll(&pfd[0], 2, cMilliesWait);
1457	Log(("usbProxyLinuxUrbReap: poll rc = %d\n", rc));
1458	if (rc >= 1)
1459	{
1460	/* If the pipe caused the return drain it. */
1461	if (pfd[1].revents & POLLIN)
1462	{
1463	uint8_t bRead;
1464	size_t cbIgnored = 0;
1465	RTPipeRead(pDevLnx->hPipeWakeupR, &bRead, 1, &cbIgnored);
1466	}
1467	break;
1468	}
1469	if (rc >= 0)
1470	return NULL;
1471
1472	if (errno != EAGAIN)
1473	{
1474	Log(("usb-linux: Reap URB - poll -> %d errno=%d pProxyDev=%s\n", rc, errno, usbProxyGetName(pProxyDev)));
1475	return NULL;
1476	}
1477	Log(("usbProxyLinuxUrbReap: poll again - weird!!!\n"));
1478	}
1479	}
1480
1481	/*
1482	* Reap URBs, non-blocking.
1483	*/
1484	for (;;)
1485	{
1486	struct usbdevfs_urb *pKUrb;
1487	while (ioctl(RTFileToNative(pDevLnx->hFile), USBDEVFS_REAPURBNDELAY, &pKUrb))
1488	if (errno != EINTR)
1489	{
1490	if (errno == ENODEV)
1491	usbProxLinuxUrbUnplugged(pProxyDev);
1492	else
1493	Log(("usb-linux: Reap URB. errno=%d pProxyDev=%s\n", errno, usbProxyGetName(pProxyDev)));
1494	return NULL;
1495	}
1496	pUrbLnx = (PUSBPROXYURBLNX)pKUrb;
1497
1498	/* split list: Is the entire split list done yet? */
1499	if (pUrbLnx->pSplitHead)
1500	{
1501	pUrbLnx->fSplitElementReaped = true;
1502
1503	/* for variable size URBs, we may need to queue more if the just-reaped URB was completely filled */
1504	if (pUrbLnx->cbSplitRemaining && (pKUrb->actual_length == pKUrb->buffer_length) && !pUrbLnx->pSplitNext)
1505	{
1506	bool fUnplugged = false;
1507	bool fSucceeded;
1508
1509	Assert(pUrbLnx->pSplitHead);
1510	Assert((pKUrb->endpoint & 0x80) && !(pKUrb->flags & USBDEVFS_URB_SHORT_NOT_OK));
1511	PUSBPROXYURBLNX pNew = usbProxyLinuxSplitURBFragment(pProxyDev, pUrbLnx->pSplitHead, pUrbLnx);
1512	if (!pNew)
1513	{
1514	Log(("usb-linux: Allocating URB fragment failed. errno=%d pProxyDev=%s\n", errno, usbProxyGetName(pProxyDev)));
1515	return NULL;
1516	}
1517	PVUSBURB pUrb = (PVUSBURB)pUrbLnx->KUrb.usercontext;
1518	fSucceeded = usbProxyLinuxSubmitURB(pProxyDev, pNew, pUrb, &fUnplugged);
1519	if (fUnplugged)
1520	usbProxLinuxUrbUnplugged(pProxyDev);
1521	if (!fSucceeded)
1522	return NULL;
1523	continue; /* try reaping another URB */
1524	}
1525	PUSBPROXYURBLNX pCur;
1526	for (pCur = pUrbLnx->pSplitHead; pCur; pCur = pCur->pSplitNext)
1527	if (!pCur->fSplitElementReaped)
1528	{
1529	pUrbLnx = NULL;
1530	break;
1531	}
1532	if (!pUrbLnx)
1533	continue;
1534	pUrbLnx = pUrbLnx->pSplitHead;
1535	}
1536	break;
1537	}
1538
1539	/*
1540	* Ok, we got one!
1541	*/
1542	PVUSBURB pUrb = (PVUSBURB)pUrbLnx->KUrb.usercontext;
1543	if ( pUrb
1544	&& !pUrbLnx->fCanceledBySubmit)
1545	{
1546	if (pUrbLnx->pSplitHead)
1547	{
1548	/* split - find the end byte and the first error status. */
1549	Assert(pUrbLnx == pUrbLnx->pSplitHead);
1550	uint8_t *pbEnd = &pUrb->abData[0];
1551	pUrb->enmStatus = VUSBSTATUS_OK;
1552	PUSBPROXYURBLNX pCur;
1553	for (pCur = pUrbLnx; pCur; pCur = pCur->pSplitNext)
1554	{
1555	if (pCur->KUrb.actual_length)
1556	pbEnd = (uint8_t *)pCur->KUrb.buffer + pCur->KUrb.actual_length;
1557	if (pUrb->enmStatus == VUSBSTATUS_OK)
1558	pUrb->enmStatus = vusbProxyLinuxUrbGetStatus(pCur);
1559	}
1560	pUrb->cbData = pbEnd - &pUrb->abData[0];
1561	usbProxyLinuxUrbUnlinkInFlight(pDevLnx, pUrbLnx);
1562	usbProxyLinuxUrbFreeSplitList(pProxyDev, pUrbLnx);
1563	}
1564	else
1565	{
1566	/* unsplit. */
1567	pUrb->enmStatus = vusbProxyLinuxUrbGetStatus(pUrbLnx);
1568	pUrb->cbData = pUrbLnx->KUrb.actual_length;
1569	if (pUrb->enmType == VUSBXFERTYPE_ISOC)
1570	{
1571	unsigned i, off;
1572	for (i = 0, off = 0; i < pUrb->cIsocPkts; i++)
1573	{
1574	#if RT_GNUC_PREREQ(4, 6)
1575	# pragma GCC diagnostic push
1576	# pragma GCC diagnostic ignored "-Warray-bounds"
1577	#endif
1578	pUrb->aIsocPkts[i].enmStatus = vusbProxyLinuxStatusToVUsbStatus(pUrbLnx->KUrb.iso_frame_desc[i].status);
1579	Assert(pUrb->aIsocPkts[i].off == off);
1580	pUrb->aIsocPkts[i].cb = pUrbLnx->KUrb.iso_frame_desc[i].actual_length;
1581	off += pUrbLnx->KUrb.iso_frame_desc[i].length;
1582	#if RT_GNUC_PREREQ(4, 6)
1583	# pragma GCC diagnostic pop
1584	#endif
1585	}
1586	}
1587	usbProxyLinuxUrbUnlinkInFlight(pDevLnx, pUrbLnx);
1588	usbProxyLinuxUrbFree(pProxyDev, pUrbLnx);
1589	}
1590	pUrb->Dev.pvPrivate = NULL;
1591
1592	/* some adjustments for message transfers. */
1593	if (pUrb->enmType == VUSBXFERTYPE_MSG)
1594	{
1595	pUrb->cbData += sizeof(VUSBSETUP);
1596	usbProxyLinuxUrbSwapSetup((PVUSBSETUP)pUrb->abData);
1597	}
1598	}
1599	else
1600	{
1601	usbProxyLinuxUrbUnlinkInFlight(pDevLnx, pUrbLnx);
1602	usbProxyLinuxUrbFree(pProxyDev, pUrbLnx);
1603	pUrb = NULL;
1604	}
1605
1606	LogFlow(("usbProxyLinuxUrbReap: pProxyDev=%s returns %p\n", usbProxyGetName(pProxyDev), pUrb));
1607	return pUrb;
1608	}
1609
1610
1611	/**
1612	* Cancels the URB.
1613	* The URB requires reaping, so we don't change its state.
1614	*/
1615	static DECLCALLBACK(int) usbProxyLinuxUrbCancel(PUSBPROXYDEV pProxyDev, PVUSBURB pUrb)
1616	{
1617	int rc = VINF_SUCCESS;
1618	PUSBPROXYURBLNX pUrbLnx = (PUSBPROXYURBLNX)pUrb->Dev.pvPrivate;
1619	if (pUrbLnx->pSplitHead)
1620	{
1621	/* split */
1622	Assert(pUrbLnx == pUrbLnx->pSplitHead);
1623	PUSBPROXYURBLNX pCur;
1624	for (pCur = pUrbLnx; pCur; pCur = pCur->pSplitNext)
1625	{
1626	if (pCur->fSplitElementReaped)
1627	continue;
1628	if ( !usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_DISCARDURB, &pCur->KUrb, true, UINT32_MAX)
1629	\|\| errno == ENOENT)
1630	continue;
1631	if (errno == ENODEV)
1632	break;
1633	/** @todo Think about how to handle errors wrt. to the status code. */
1634	Log(("usb-linux: Discard URB %p failed, errno=%d. pProxyDev=%s!!! (split)\n",
1635	pUrb, errno, usbProxyGetName(pProxyDev)));
1636	}
1637	}
1638	else
1639	{
1640	/* unsplit */
1641	if ( usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_DISCARDURB, &pUrbLnx->KUrb, true, UINT32_MAX)
1642	&& errno != ENODEV /* deal with elsewhere. */
1643	&& errno != ENOENT)
1644	{
1645	Log(("usb-linux: Discard URB %p failed, errno=%d. pProxyDev=%s!!!\n",
1646	pUrb, errno, usbProxyGetName(pProxyDev)));
1647	rc = RTErrConvertFromErrno(errno);
1648	}
1649	}
1650
1651	return rc;
1652	}
1653
1654
1655	static DECLCALLBACK(int) usbProxyLinuxWakeup(PUSBPROXYDEV pProxyDev)
1656	{
1657	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
1658	size_t cbIgnored;
1659
1660	LogFlowFunc(("pProxyDev=%p\n", pProxyDev));
1661
1662	return RTPipeWrite(pDevLnx->hPipeWakeupW, "", 1, &cbIgnored);
1663	}
1664
1665	/**
1666	* The Linux USB Proxy Backend.
1667	*/
1668	const USBPROXYBACK g_USBProxyDeviceHost =
1669	{
1670	/* pszName */
1671	"host",
1672	/* cbBackend */
1673	sizeof(USBPROXYDEVLNX),
1674	usbProxyLinuxOpen,
1675	usbProxyLinuxInit,
1676	usbProxyLinuxClose,
1677	usbProxyLinuxReset,
1678	usbProxyLinuxSetConfig,
1679	usbProxyLinuxClaimInterface,
1680	usbProxyLinuxReleaseInterface,
1681	usbProxyLinuxSetInterface,
1682	usbProxyLinuxClearHaltedEp,
1683	usbProxyLinuxUrbQueue,
1684	usbProxyLinuxUrbCancel,
1685	usbProxyLinuxUrbReap,
1686	usbProxyLinuxWakeup,
1687	0
1688	};
1689
1690
1691	/*
1692	* Local Variables:
1693	* mode: c
1694	* c-file-style: "bsd"
1695	* c-basic-offset: 4
1696	* End:
1697	*/
1698

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source: vbox/trunk/src/VBox/Devices/USB/linux/USBProxyDevice-linux.cpp@ 76729

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