USBProxyDevice-linux.cpp@ 90791

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1	/* $Id: USBProxyDevice-linux.cpp 87855 2021-02-24 07:31:59Z vboxsync $ */
2	/** @file
3	* USB device proxy - the Linux backend.
4	*/
5
6	/*
7	* Copyright (C) 2006-2020 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 waking up - writing end. */
133	RTPIPE hPipeWakeupW;
134	/** Pipe handle for waking 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=%Rrc!\n", pProxyDev, pszAddress, rc));
671
672	NOREF(pvBackend);
673	return rc;
674	}
675
676
677	/**
678	* Claims all the interfaces and figures out the
679	* current configuration.
680	*
681	* @returns VINF_SUCCESS.
682	* @param pProxyDev The proxy device.
683	*/
684	static DECLCALLBACK(int) usbProxyLinuxInit(PUSBPROXYDEV pProxyDev)
685	{
686	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
687
688	/*
689	* Brute force rulez.
690	* usbProxyLinuxSetConnected check for masked interfaces.
691	*/
692	unsigned iIf;
693	for (iIf = 0; iIf < 256; iIf++)
694	usbProxyLinuxSetConnected(pProxyDev, iIf, false, true);
695
696	/*
697	* Determine the active configuration.
698	*
699	* If there isn't any active configuration, we will get EHOSTUNREACH (113) errors
700	* when trying to read the device descriptors in usbProxyDevCreate. So, we'll make
701	* the first one active (usually 1) then.
702	*/
703	pProxyDev->cIgnoreSetConfigs = 1;
704	int iFirstCfg;
705	pProxyDev->iActiveCfg = usbProxyLinuxFindActiveConfig(pProxyDev, pDevLnx->pszPath, &iFirstCfg);
706	if (pProxyDev->iActiveCfg == -1)
707	{
708	usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_SETCONFIGURATION, &iFirstCfg, false, UINT32_MAX);
709	pProxyDev->iActiveCfg = usbProxyLinuxFindActiveConfig(pProxyDev, pDevLnx->pszPath, NULL);
710	Log(("usbProxyLinuxInit: No active config! Tried to set %d: iActiveCfg=%d\n", iFirstCfg, pProxyDev->iActiveCfg));
711	}
712	else
713	Log(("usbProxyLinuxInit(%p): iActiveCfg=%d\n", pProxyDev, pProxyDev->iActiveCfg));
714	return VINF_SUCCESS;
715	}
716
717
718	/**
719	* Closes the proxy device.
720	*/
721	static DECLCALLBACK(void) usbProxyLinuxClose(PUSBPROXYDEV pProxyDev)
722	{
723	LogFlow(("usbProxyLinuxClose: pProxyDev=%s\n", usbProxyGetName(pProxyDev)));
724	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
725	AssertPtrReturnVoid(pDevLnx);
726
727	/*
728	* Try put the device in a state which linux can cope with before we release it.
729	* Resetting it would be a nice start, although we must remember
730	* that it might have been disconnected...
731	*
732	* Don't reset if we're masking interfaces or if construction failed.
733	*/
734	if (pProxyDev->fInited)
735	{
736	/* ASSUMES: thread == EMT */
737	if ( pProxyDev->fMaskedIfs
738	\|\| !usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_RESET, NULL, false, 10))
739	{
740	/* Connect drivers. */
741	unsigned iIf;
742	for (iIf = 0; iIf < 256; iIf++)
743	usbProxyLinuxSetConnected(pProxyDev, iIf, true, true);
744	Log(("USB: Successfully reset device pProxyDev=%s\n", usbProxyGetName(pProxyDev)));
745	}
746	else if (errno != ENODEV)
747	LogRel(("USB: Reset failed, errno=%d, pProxyDev=%s.\n", errno, usbProxyGetName(pProxyDev)));
748	else /* This will happen if device was detached. */
749	Log(("USB: Reset failed, errno=%d (ENODEV), pProxyDev=%s.\n", errno, usbProxyGetName(pProxyDev)));
750	}
751
752	/*
753	* Now we can free all the resources and close the device.
754	*/
755	RTCritSectDelete(&pDevLnx->CritSect);
756
757	PUSBPROXYURBLNX pUrbLnx;
758	PUSBPROXYURBLNX pUrbLnxNext;
759	RTListForEachSafe(&pDevLnx->ListInFlight, pUrbLnx, pUrbLnxNext, USBPROXYURBLNX, NodeList)
760	{
761	RTListNodeRemove(&pUrbLnx->NodeList);
762
763	if ( usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_DISCARDURB, &pUrbLnx->KUrb, false, UINT32_MAX)
764	&& errno != ENODEV
765	&& errno != ENOENT)
766	AssertMsgFailed(("errno=%d\n", errno));
767
768	if (pUrbLnx->pSplitHead)
769	{
770	PUSBPROXYURBLNX pCur = pUrbLnx->pSplitNext;
771	while (pCur)
772	{
773	PUSBPROXYURBLNX pFree = pCur;
774	pCur = pFree->pSplitNext;
775	if ( !pFree->fSplitElementReaped
776	&& usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_DISCARDURB, &pFree->KUrb, false, UINT32_MAX)
777	&& errno != ENODEV
778	&& errno != ENOENT)
779	AssertMsgFailed(("errno=%d\n", errno));
780	RTMemFree(pFree);
781	}
782	}
783	else
784	Assert(!pUrbLnx->pSplitNext);
785	RTMemFree(pUrbLnx);
786	}
787
788	RTListForEachSafe(&pDevLnx->ListFree, pUrbLnx, pUrbLnxNext, USBPROXYURBLNX, NodeList)
789	{
790	RTListNodeRemove(&pUrbLnx->NodeList);
791	RTMemFree(pUrbLnx);
792	}
793
794	RTFileClose(pDevLnx->hFile);
795	pDevLnx->hFile = NIL_RTFILE;
796
797	RTPipeClose(pDevLnx->hPipeWakeupR);
798	RTPipeClose(pDevLnx->hPipeWakeupW);
799
800	RTStrFree(pDevLnx->pszPath);
801
802	LogFlow(("usbProxyLinuxClose: returns\n"));
803	}
804
805
806	/** @interface_method_impl{USBPROXYBACK,pfnReset} */
807	static DECLCALLBACK(int) usbProxyLinuxReset(PUSBPROXYDEV pProxyDev, bool fResetOnLinux)
808	{
809	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
810	RT_NOREF(fResetOnLinux);
811	Assert(!pProxyDev->fMaskedIfs);
812	LogFlow(("usbProxyLinuxReset: pProxyDev=%s\n", usbProxyGetName(pProxyDev)));
813
814	uint32_t fActiveIfsMask = pDevLnx->fClaimedIfsMask;
815	unsigned i;
816
817	/*
818	* Before reset, release claimed interfaces. This less than obvious move
819	* prevents Linux from rebinding in-kernel drivers to the device after reset.
820	*/
821	for (i = 0; i < (sizeof(fActiveIfsMask) * 8); ++i)
822	{
823	if (fActiveIfsMask & RT_BIT(i))
824	{
825	usbProxyLinuxReleaseInterface(pProxyDev, i);
826	}
827	}
828
829	if (usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_RESET, NULL, false, 10))
830	{
831	int rc = errno;
832	LogRel(("usb-linux: Reset failed, rc=%Rrc errno=%d.\n", RTErrConvertFromErrno(rc), rc));
833	pProxyDev->iActiveCfg = -1;
834	return RTErrConvertFromErrno(rc);
835	}
836
837	/*
838	* Now reclaim previously claimed interfaces. If that doesn't work, let's hope
839	* the guest/VUSB can recover from that. Can happen if reset changes configuration.
840	*/
841	for (i = 0; i < (sizeof(fActiveIfsMask) * 8); ++i)
842	{
843	if (fActiveIfsMask & RT_BIT(i))
844	{
845	usbProxyLinuxClaimInterface(pProxyDev, i);
846	}
847	}
848
849	/* find the active config - damn annoying. */
850	pProxyDev->iActiveCfg = usbProxyLinuxFindActiveConfig(pProxyDev, pDevLnx->pszPath, NULL);
851	LogFlow(("usbProxyLinuxReset: returns successfully iActiveCfg=%d\n", pProxyDev->iActiveCfg));
852
853	pProxyDev->cIgnoreSetConfigs = 2;
854	return VINF_SUCCESS;
855	}
856
857
858	/**
859	* SET_CONFIGURATION.
860	*
861	* The caller makes sure that it's not called first time after open or reset
862	* with the active interface.
863	*
864	* @returns success indicator.
865	* @param pProxyDev The device instance data.
866	* @param iCfg The configuration to set.
867	*/
868	static DECLCALLBACK(int) usbProxyLinuxSetConfig(PUSBPROXYDEV pProxyDev, int iCfg)
869	{
870	LogFlow(("usbProxyLinuxSetConfig: pProxyDev=%s cfg=%#x\n",
871	usbProxyGetName(pProxyDev), iCfg));
872
873	if (usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_SETCONFIGURATION, &iCfg, true, UINT32_MAX))
874	{
875	Log(("usb-linux: Set configuration. errno=%d\n", errno));
876	return RTErrConvertFromErrno(errno);
877	}
878	return VINF_SUCCESS;
879	}
880
881
882	/**
883	* Claims an interface.
884	* @returns success indicator.
885	*/
886	static DECLCALLBACK(int) usbProxyLinuxClaimInterface(PUSBPROXYDEV pProxyDev, int iIf)
887	{
888	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
889
890	LogFlow(("usbProxyLinuxClaimInterface: pProxyDev=%s ifnum=%#x\n", usbProxyGetName(pProxyDev), iIf));
891	usbProxyLinuxSetConnected(pProxyDev, iIf, false, false);
892
893	if (usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_CLAIMINTERFACE, &iIf, true, UINT32_MAX))
894	{
895	pDevLnx->fClaimedIfsMask &= ~RT_BIT(iIf);
896	LogRel(("usb-linux: Claim interface. errno=%d pProxyDev=%s\n", errno, usbProxyGetName(pProxyDev)));
897	return RTErrConvertFromErrno(errno);
898	}
899	pDevLnx->fClaimedIfsMask \|= RT_BIT(iIf);
900	return VINF_SUCCESS;
901	}
902
903
904	/**
905	* Releases an interface.
906	* @returns success indicator.
907	*/
908	static DECLCALLBACK(int) usbProxyLinuxReleaseInterface(PUSBPROXYDEV pProxyDev, int iIf)
909	{
910	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
911
912	LogFlow(("usbProxyLinuxReleaseInterface: pProxyDev=%s ifnum=%#x\n", usbProxyGetName(pProxyDev), iIf));
913
914	if (usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_RELEASEINTERFACE, &iIf, true, UINT32_MAX))
915	{
916	LogRel(("usb-linux: Release interface, errno=%d. pProxyDev=%s\n", errno, usbProxyGetName(pProxyDev)));
917	return RTErrConvertFromErrno(errno);
918	}
919	pDevLnx->fClaimedIfsMask &= ~RT_BIT(iIf);
920	return VINF_SUCCESS;
921	}
922
923
924	/**
925	* SET_INTERFACE.
926	*
927	* @returns success indicator.
928	*/
929	static DECLCALLBACK(int) usbProxyLinuxSetInterface(PUSBPROXYDEV pProxyDev, int iIf, int iAlt)
930	{
931	struct usbdevfs_setinterface SetIf;
932	LogFlow(("usbProxyLinuxSetInterface: pProxyDev=%p iIf=%#x iAlt=%#x\n", pProxyDev, iIf, iAlt));
933
934	SetIf.interface = iIf;
935	SetIf.altsetting = iAlt;
936	if (usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_SETINTERFACE, &SetIf, true, UINT32_MAX))
937	{
938	Log(("usb-linux: Set interface, errno=%d. pProxyDev=%s\n", errno, usbProxyGetName(pProxyDev)));
939	return RTErrConvertFromErrno(errno);
940	}
941	return VINF_SUCCESS;
942	}
943
944
945	/**
946	* Clears the halted endpoint 'EndPt'.
947	*/
948	static DECLCALLBACK(int) usbProxyLinuxClearHaltedEp(PUSBPROXYDEV pProxyDev, unsigned int EndPt)
949	{
950	LogFlow(("usbProxyLinuxClearHaltedEp: pProxyDev=%s EndPt=%u\n", usbProxyGetName(pProxyDev), EndPt));
951
952	if (usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_CLEAR_HALT, &EndPt, true, UINT32_MAX))
953	{
954	/*
955	* Unfortunately this doesn't work on control pipes.
956	* Windows doing this on the default endpoint and possibly other pipes too,
957	* so we'll feign success for ENOENT errors.
958	*/
959	if (errno == ENOENT)
960	{
961	Log(("usb-linux: clear_halted_ep failed errno=%d. pProxyDev=%s ep=%d - IGNORED\n",
962	errno, usbProxyGetName(pProxyDev), EndPt));
963	return VINF_SUCCESS;
964	}
965	Log(("usb-linux: clear_halted_ep failed errno=%d. pProxyDev=%s ep=%d\n",
966	errno, usbProxyGetName(pProxyDev), EndPt));
967	return RTErrConvertFromErrno(errno);
968	}
969	return VINF_SUCCESS;
970	}
971
972
973	/**
974	* Setup packet byte-swapping routines.
975	*/
976	static void usbProxyLinuxUrbSwapSetup(PVUSBSETUP pSetup)
977	{
978	pSetup->wValue = RT_H2LE_U16(pSetup->wValue);
979	pSetup->wIndex = RT_H2LE_U16(pSetup->wIndex);
980	pSetup->wLength = RT_H2LE_U16(pSetup->wLength);
981	}
982
983
984	/**
985	* Clean up after a failed URB submit.
986	*/
987	static void usbProxyLinuxCleanupFailedSubmit(PUSBPROXYDEV pProxyDev, PUSBPROXYURBLNX pUrbLnx, PUSBPROXYURBLNX pCur, PVUSBURB pUrb, bool *pfUnplugged)
988	{
989	if (pUrb->enmType == VUSBXFERTYPE_MSG)
990	usbProxyLinuxUrbSwapSetup((PVUSBSETUP)pUrb->abData);
991
992	/* discard and reap later (walking with pUrbLnx). */
993	if (pUrbLnx != pCur)
994	{
995	for (;;)
996	{
997	pUrbLnx->fCanceledBySubmit = true;
998	pUrbLnx->KUrb.usercontext = NULL;
999	if (usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_DISCARDURB, &pUrbLnx->KUrb, false, UINT32_MAX))
1000	{
1001	if (errno == ENODEV)
1002	*pfUnplugged = true;
1003	else if (errno == ENOENT)
1004	pUrbLnx->fSplitElementReaped = true;
1005	else
1006	LogRel(("USB: Failed to discard %p! errno=%d (pUrb=%p)\n", pUrbLnx->KUrb.usercontext, errno, pUrb)); /* serious! */
1007	}
1008	if (pUrbLnx->pSplitNext == pCur)
1009	{
1010	pUrbLnx->pSplitNext = NULL;
1011	break;
1012	}
1013	pUrbLnx = pUrbLnx->pSplitNext; Assert(pUrbLnx);
1014	}
1015	}
1016
1017	/* free the unsubmitted ones. */
1018	while (pCur)
1019	{
1020	PUSBPROXYURBLNX pFree = pCur;
1021	pCur = pCur->pSplitNext;
1022	usbProxyLinuxUrbFree(pProxyDev, pFree);
1023	}
1024
1025	/* send unplug event if we failed with ENODEV originally. */
1026	if (*pfUnplugged)
1027	usbProxLinuxUrbUnplugged(pProxyDev);
1028	}
1029
1030	/**
1031	* Submit one URB through the usbfs IOCTL interface, with
1032	* retries
1033	*
1034	* @returns VBox status code.
1035	*/
1036	static int usbProxyLinuxSubmitURB(PUSBPROXYDEV pProxyDev, PUSBPROXYURBLNX pCur, PVUSBURB pUrb, bool *pfUnplugged)
1037	{
1038	RT_NOREF(pUrb);
1039	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
1040	unsigned cTries = 0;
1041
1042	while (ioctl(RTFileToNative(pDevLnx->hFile), USBDEVFS_SUBMITURB, &pCur->KUrb))
1043	{
1044	if (errno == EINTR)
1045	continue;
1046	if (errno == ENODEV)
1047	{
1048	Log(("usbProxyLinuxSubmitURB: ENODEV -> unplugged. pProxyDev=%s\n", usbProxyGetName(pProxyDev)));
1049	*pfUnplugged = true;
1050	return RTErrConvertFromErrno(errno);
1051	}
1052
1053	Log(("usb-linux: Submit URB %p -> %d!!! type=%d ep=%#x buffer_length=%#x cTries=%d\n",
1054	pUrb, errno, pCur->KUrb.type, pCur->KUrb.endpoint, pCur->KUrb.buffer_length, cTries));
1055	if (errno != EBUSY && ++cTries < 3) /* this doesn't work for the floppy :/ */
1056	continue;
1057
1058	return RTErrConvertFromErrno(errno);
1059	}
1060	return VINF_SUCCESS;
1061	}
1062
1063	/** The split size. 16K in known Linux kernel versions. */
1064	#define SPLIT_SIZE 0x4000
1065
1066	/**
1067	* Create a URB fragment of up to SPLIT_SIZE size and hook it
1068	* into the list of fragments.
1069	*
1070	* @returns pointer to newly allocated URB fragment or NULL.
1071	*/
1072	static PUSBPROXYURBLNX usbProxyLinuxSplitURBFragment(PUSBPROXYDEV pProxyDev, PUSBPROXYURBLNX pHead, PUSBPROXYURBLNX pCur)
1073	{
1074	PUSBPROXYURBLNX pNew;
1075	uint32_t cbLeft = pCur->cbSplitRemaining;
1076	uint8_t pb = (uint8_t )pCur->KUrb.buffer;
1077
1078	LogFlowFunc(("pProxyDev=%p pHead=%p pCur=%p\n", pProxyDev, pHead, pCur));
1079
1080	Assert(cbLeft != 0);
1081	pNew = pCur->pSplitNext = usbProxyLinuxUrbAlloc(pProxyDev, pHead);
1082	if (!pNew)
1083	{
1084	usbProxyLinuxUrbFreeSplitList(pProxyDev, pHead);
1085	return NULL;
1086	}
1087	Assert(pNew->pSplitHead == pHead);
1088	Assert(pNew->pSplitNext == NULL);
1089
1090	pNew->KUrb = pHead->KUrb;
1091	pNew->KUrb.buffer = pb + pCur->KUrb.buffer_length;
1092	pNew->KUrb.buffer_length = RT_MIN(cbLeft, SPLIT_SIZE);
1093	pNew->KUrb.actual_length = 0;
1094
1095	cbLeft -= pNew->KUrb.buffer_length;
1096	Assert(cbLeft < INT32_MAX);
1097	pNew->cbSplitRemaining = cbLeft;
1098	LogFlowFunc(("returns pNew=%p\n", pNew));
1099	return pNew;
1100	}
1101
1102	/**
1103	* Try splitting up a VUSB URB into smaller URBs which the
1104	* linux kernel (usbfs) can deal with.
1105	*
1106	* NB: For ShortOK reads things get a little tricky - we don't
1107	* know how much data is going to arrive and not all the
1108	* fragment URBs might be filled. We can only safely set up one
1109	* URB at a time -> worse performance but correct behaviour.
1110	*
1111	* @returns VBox status code.
1112	* @param pProxyDev The proxy device.
1113	* @param pUrbLnx The linux URB which was rejected because of being too big.
1114	* @param pUrb The VUSB URB.
1115	*/
1116	static int usbProxyLinuxUrbQueueSplit(PUSBPROXYDEV pProxyDev, PUSBPROXYURBLNX pUrbLnx, PVUSBURB pUrb)
1117	{
1118	/*
1119	* Split it up into SPLIT_SIZE sized blocks.
1120	*/
1121	const unsigned cKUrbs = (pUrb->cbData + SPLIT_SIZE - 1) / SPLIT_SIZE;
1122	LogFlow(("usbProxyLinuxUrbQueueSplit: pUrb=%p cKUrbs=%d cbData=%d\n", pUrb, cKUrbs, pUrb->cbData));
1123
1124	uint32_t cbLeft = pUrb->cbData;
1125	uint8_t *pb = &pUrb->abData[0];
1126
1127	/* the first one (already allocated) */
1128	switch (pUrb->enmType)
1129	{
1130	default: /* shut up gcc */
1131	case VUSBXFERTYPE_BULK: pUrbLnx->KUrb.type = USBDEVFS_URB_TYPE_BULK; break;
1132	case VUSBXFERTYPE_INTR: pUrbLnx->KUrb.type = USBDEVFS_URB_TYPE_INTERRUPT; break;
1133	case VUSBXFERTYPE_MSG: pUrbLnx->KUrb.type = USBDEVFS_URB_TYPE_CONTROL; break;
1134	case VUSBXFERTYPE_ISOC:
1135	AssertMsgFailed(("We can't split isochronous URBs!\n"));
1136	usbProxyLinuxUrbFree(pProxyDev, pUrbLnx);
1137	return VERR_INVALID_PARAMETER; /** @todo Better status code. */
1138	}
1139	pUrbLnx->KUrb.endpoint = pUrb->EndPt;
1140	if (pUrb->enmDir == VUSBDIRECTION_IN)
1141	pUrbLnx->KUrb.endpoint \|= 0x80;
1142	pUrbLnx->KUrb.flags = 0;
1143	if (pUrb->enmDir == VUSBDIRECTION_IN && pUrb->fShortNotOk)
1144	pUrbLnx->KUrb.flags \|= USBDEVFS_URB_SHORT_NOT_OK;
1145	pUrbLnx->KUrb.status = 0;
1146	pUrbLnx->KUrb.buffer = pb;
1147	pUrbLnx->KUrb.buffer_length = RT_MIN(cbLeft, SPLIT_SIZE);
1148	pUrbLnx->KUrb.actual_length = 0;
1149	pUrbLnx->KUrb.start_frame = 0;
1150	pUrbLnx->KUrb.number_of_packets = 0;
1151	pUrbLnx->KUrb.error_count = 0;
1152	pUrbLnx->KUrb.signr = 0;
1153	pUrbLnx->KUrb.usercontext = pUrb;
1154	pUrbLnx->pSplitHead = pUrbLnx;
1155	pUrbLnx->pSplitNext = NULL;
1156
1157	PUSBPROXYURBLNX pCur = pUrbLnx;
1158
1159	cbLeft -= pUrbLnx->KUrb.buffer_length;
1160	pUrbLnx->cbSplitRemaining = cbLeft;
1161
1162	int rc = VINF_SUCCESS;
1163	bool fUnplugged = false;
1164	if (pUrb->enmDir == VUSBDIRECTION_IN && !pUrb->fShortNotOk)
1165	{
1166	/* Subsequent fragments will be queued only after the previous fragment is reaped
1167	* and only if necessary.
1168	*/
1169	Log(("usb-linux: Large ShortOK read, only queuing first fragment.\n"));
1170	Assert(pUrbLnx->cbSplitRemaining > 0 && pUrbLnx->cbSplitRemaining < 256 * _1K);
1171	rc = usbProxyLinuxSubmitURB(pProxyDev, pUrbLnx, pUrb, &fUnplugged);
1172	}
1173	else
1174	{
1175	/* the rest. */
1176	unsigned i;
1177	for (i = 1; i < cKUrbs; i++)
1178	{
1179	pCur = usbProxyLinuxSplitURBFragment(pProxyDev, pUrbLnx, pCur);
1180	if (!pCur)
1181	return VERR_NO_MEMORY;
1182	}
1183	Assert(pCur->cbSplitRemaining == 0);
1184
1185	/* Submit the blocks. */
1186	pCur = pUrbLnx;
1187	for (i = 0; i < cKUrbs; i++, pCur = pCur->pSplitNext)
1188	{
1189	rc = usbProxyLinuxSubmitURB(pProxyDev, pCur, pUrb, &fUnplugged);
1190	if (RT_FAILURE(rc))
1191	break;
1192	}
1193	}
1194
1195	if (RT_SUCCESS(rc))
1196	{
1197	pUrb->Dev.pvPrivate = pUrbLnx;
1198	usbProxyLinuxUrbLinkInFlight(USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX), pUrbLnx);
1199	LogFlow(("usbProxyLinuxUrbQueueSplit: ok\n"));
1200	return VINF_SUCCESS;
1201	}
1202
1203	usbProxyLinuxCleanupFailedSubmit(pProxyDev, pUrbLnx, pCur, pUrb, &fUnplugged);
1204	return rc;
1205	}
1206
1207
1208	/**
1209	* @interface_method_impl{USBPROXYBACK,pfnUrbQueue}
1210	*/
1211	static DECLCALLBACK(int) usbProxyLinuxUrbQueue(PUSBPROXYDEV pProxyDev, PVUSBURB pUrb)
1212	{
1213	int rc = VINF_SUCCESS;
1214	unsigned cTries;
1215	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
1216	LogFlow(("usbProxyLinuxUrbQueue: pProxyDev=%s pUrb=%p EndPt=%d cbData=%d\n",
1217	usbProxyGetName(pProxyDev), pUrb, pUrb->EndPt, pUrb->cbData));
1218
1219	/*
1220	* Allocate a linux urb.
1221	*/
1222	PUSBPROXYURBLNX pUrbLnx = usbProxyLinuxUrbAlloc(pProxyDev, NULL);
1223	if (!pUrbLnx)
1224	return VERR_NO_MEMORY;
1225
1226	pUrbLnx->KUrb.endpoint = pUrb->EndPt \| (pUrb->enmDir == VUSBDIRECTION_IN ? 0x80 : 0);
1227	pUrbLnx->KUrb.status = 0;
1228	pUrbLnx->KUrb.flags = 0;
1229	if (pUrb->enmDir == VUSBDIRECTION_IN && pUrb->fShortNotOk)
1230	pUrbLnx->KUrb.flags \|= USBDEVFS_URB_SHORT_NOT_OK;
1231	pUrbLnx->KUrb.buffer = pUrb->abData;
1232	pUrbLnx->KUrb.buffer_length = pUrb->cbData;
1233	pUrbLnx->KUrb.actual_length = 0;
1234	pUrbLnx->KUrb.start_frame = 0;
1235	pUrbLnx->KUrb.number_of_packets = 0;
1236	pUrbLnx->KUrb.error_count = 0;
1237	pUrbLnx->KUrb.signr = 0;
1238	pUrbLnx->KUrb.usercontext = pUrb;
1239
1240	switch (pUrb->enmType)
1241	{
1242	case VUSBXFERTYPE_MSG:
1243	pUrbLnx->KUrb.type = USBDEVFS_URB_TYPE_CONTROL;
1244	if (pUrb->cbData < sizeof(VUSBSETUP))
1245	{
1246	usbProxyLinuxUrbFree(pProxyDev, pUrbLnx);
1247	return VERR_BUFFER_UNDERFLOW;
1248	}
1249	usbProxyLinuxUrbSwapSetup((PVUSBSETUP)pUrb->abData);
1250	LogFlow(("usbProxyLinuxUrbQueue: message\n"));
1251	break;
1252	case VUSBXFERTYPE_BULK:
1253	pUrbLnx->KUrb.type = USBDEVFS_URB_TYPE_BULK;
1254	break;
1255	case VUSBXFERTYPE_ISOC:
1256	pUrbLnx->KUrb.type = USBDEVFS_URB_TYPE_ISO;
1257	pUrbLnx->KUrb.flags \|= USBDEVFS_URB_ISO_ASAP;
1258	pUrbLnx->KUrb.number_of_packets = pUrb->cIsocPkts;
1259	unsigned i;
1260	for (i = 0; i < pUrb->cIsocPkts; i++)
1261	{
1262	#if RT_GNUC_PREREQ(4, 6)
1263	# pragma GCC diagnostic push
1264	# pragma GCC diagnostic ignored "-Warray-bounds"
1265	#endif
1266	pUrbLnx->KUrb.iso_frame_desc[i].length = pUrb->aIsocPkts[i].cb;
1267	pUrbLnx->KUrb.iso_frame_desc[i].actual_length = 0;
1268	pUrbLnx->KUrb.iso_frame_desc[i].status = 0x7fff;
1269	#if RT_GNUC_PREREQ(4, 6)
1270	# pragma GCC diagnostic pop
1271	#endif
1272	}
1273	break;
1274	case VUSBXFERTYPE_INTR:
1275	pUrbLnx->KUrb.type = USBDEVFS_URB_TYPE_INTERRUPT;
1276	break;
1277	default:
1278	rc = VERR_INVALID_PARAMETER; /** @todo better status code. */
1279	}
1280
1281	/*
1282	* We have to serialize access by using the critial section here because this
1283	* thread might be suspended after submitting the URB but before linking it into
1284	* the in flight list. This would get us in trouble when reaping the URB on another
1285	* thread while it isn't in the in flight list.
1286	*
1287	* Linking the URB into the list before submitting it like it was done in the past is not
1288	* possible either because submitting the URB might fail here because the device gets
1289	* detached. The reaper thread gets this event too and might race this thread before we
1290	* can unlink the URB from the active list and the common code might end up freeing
1291	* the common URB structure twice.
1292	*/
1293	RTCritSectEnter(&pDevLnx->CritSect);
1294	/*
1295	* Submit it.
1296	*/
1297	cTries = 0;
1298	while (ioctl(RTFileToNative(pDevLnx->hFile), USBDEVFS_SUBMITURB, &pUrbLnx->KUrb))
1299	{
1300	if (errno == EINTR)
1301	continue;
1302	if (errno == ENODEV)
1303	{
1304	rc = RTErrConvertFromErrno(errno);
1305	Log(("usbProxyLinuxUrbQueue: ENODEV -> unplugged. pProxyDev=%s\n", usbProxyGetName(pProxyDev)));
1306	if (pUrb->enmType == VUSBXFERTYPE_MSG)
1307	usbProxyLinuxUrbSwapSetup((PVUSBSETUP)pUrb->abData);
1308
1309	RTCritSectLeave(&pDevLnx->CritSect);
1310	usbProxyLinuxUrbFree(pProxyDev, pUrbLnx);
1311	usbProxLinuxUrbUnplugged(pProxyDev);
1312	return rc;
1313	}
1314
1315	/*
1316	* usbfs has or used to have a low buffer limit (16KB) in order to prevent
1317	* processes wasting kmalloc'ed memory. It will return EINVAL if break that
1318	* limit, and we'll have to split the VUSB URB up into multiple linux URBs.
1319	*
1320	* Since this is a limit which is subject to change, we cannot check for it
1321	* before submitting the URB. We just have to try and fail.
1322	*/
1323	if ( errno == EINVAL
1324	&& pUrb->cbData >= 8*_1K)
1325	{
1326	rc = usbProxyLinuxUrbQueueSplit(pProxyDev, pUrbLnx, pUrb);
1327	RTCritSectLeave(&pDevLnx->CritSect);
1328	return rc;
1329	}
1330
1331	Log(("usb-linux: Queue URB %p -> %d!!! type=%d ep=%#x buffer_length=%#x cTries=%d\n",
1332	pUrb, errno, pUrbLnx->KUrb.type, pUrbLnx->KUrb.endpoint, pUrbLnx->KUrb.buffer_length, cTries));
1333	if (errno != EBUSY && ++cTries < 3) /* this doesn't work for the floppy :/ */
1334	continue;
1335
1336	RTCritSectLeave(&pDevLnx->CritSect);
1337	rc = RTErrConvertFromErrno(errno);
1338	if (pUrb->enmType == VUSBXFERTYPE_MSG)
1339	usbProxyLinuxUrbSwapSetup((PVUSBSETUP)pUrb->abData);
1340	usbProxyLinuxUrbFree(pProxyDev, pUrbLnx);
1341	return rc;
1342	}
1343
1344	usbProxyLinuxUrbLinkInFlight(pDevLnx, pUrbLnx);
1345	RTCritSectLeave(&pDevLnx->CritSect);
1346
1347	LogFlow(("usbProxyLinuxUrbQueue: ok\n"));
1348	pUrb->Dev.pvPrivate = pUrbLnx;
1349	return rc;
1350	}
1351
1352
1353	/**
1354	* Translate the linux status to a VUSB status.
1355	*
1356	* @remarks see cc_to_error in ohci.h, uhci_map_status in uhci-q.c,
1357	* sitd_complete+itd_complete in ehci-sched.c, and qtd_copy_status in
1358	* ehci-q.c.
1359	*/
1360	static VUSBSTATUS vusbProxyLinuxStatusToVUsbStatus(int iStatus)
1361	{
1362	switch (iStatus)
1363	{
1364	/** @todo VUSBSTATUS_NOT_ACCESSED */
1365	case -EXDEV: /* iso transfer, partial result. */
1366	case 0:
1367	return VUSBSTATUS_OK;
1368
1369	case -EILSEQ:
1370	return VUSBSTATUS_CRC;
1371
1372	case -EREMOTEIO: /* ehci and ohci uses this for underflow error. */
1373	return VUSBSTATUS_DATA_UNDERRUN;
1374	case -EOVERFLOW:
1375	return VUSBSTATUS_DATA_OVERRUN;
1376
1377	case -ETIME:
1378	case -ENODEV:
1379	return VUSBSTATUS_DNR;
1380
1381	//case -ECOMM:
1382	// return VUSBSTATUS_BUFFER_OVERRUN;
1383	//case -ENOSR:
1384	// return VUSBSTATUS_BUFFER_UNDERRUN;
1385
1386	case -EPROTO:
1387	Log(("vusbProxyLinuxStatusToVUsbStatus: DNR/EPPROTO!!\n"));
1388	return VUSBSTATUS_DNR;
1389
1390	case -EPIPE:
1391	Log(("vusbProxyLinuxStatusToVUsbStatus: STALL/EPIPE!!\n"));
1392	return VUSBSTATUS_STALL;
1393
1394	case -ESHUTDOWN:
1395	Log(("vusbProxyLinuxStatusToVUsbStatus: SHUTDOWN!!\n"));
1396	return VUSBSTATUS_STALL;
1397
1398	case -ENOENT:
1399	Log(("vusbProxyLinuxStatusToVUsbStatus: ENOENT!!\n"));
1400	return VUSBSTATUS_STALL;
1401
1402	default:
1403	Log(("vusbProxyLinuxStatusToVUsbStatus: status %d!!\n", iStatus));
1404	return VUSBSTATUS_STALL;
1405	}
1406	}
1407
1408
1409	/**
1410	* Get and translates the linux status to a VUSB status.
1411	*/
1412	static VUSBSTATUS vusbProxyLinuxUrbGetStatus(PUSBPROXYURBLNX pUrbLnx)
1413	{
1414	return vusbProxyLinuxStatusToVUsbStatus(pUrbLnx->KUrb.status);
1415	}
1416
1417
1418	/**
1419	* Reap URBs in-flight on a device.
1420	*
1421	* @returns Pointer to a completed URB.
1422	* @returns NULL if no URB was completed.
1423	* @param pProxyDev The device.
1424	* @param cMillies Number of milliseconds to wait. Use 0 to not wait at all.
1425	*/
1426	static DECLCALLBACK(PVUSBURB) usbProxyLinuxUrbReap(PUSBPROXYDEV pProxyDev, RTMSINTERVAL cMillies)
1427	{
1428	PUSBPROXYURBLNX pUrbLnx = NULL;
1429	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
1430
1431	/*
1432	* Block for requested period.
1433	*
1434	* It seems to me that the path of poll() is shorter and
1435	* involves less semaphores than ioctl() on usbfs. So, we'll
1436	* do a poll regardless of whether cMillies == 0 or not.
1437	*/
1438	if (cMillies)
1439	{
1440	int cMilliesWait = cMillies == RT_INDEFINITE_WAIT ? -1 : cMillies;
1441
1442	for (;;)
1443	{
1444	struct pollfd pfd[2];
1445	pfd[0].fd = RTFileToNative(pDevLnx->hFile);
1446	pfd[0].events = POLLOUT \| POLLWRNORM /* completed async */
1447	\| POLLERR \| POLLHUP /* disconnected */;
1448	pfd[0].revents = 0;
1449
1450	pfd[1].fd = RTPipeToNative(pDevLnx->hPipeWakeupR);
1451	pfd[1].events = POLLIN \| POLLHUP;
1452	pfd[1].revents = 0;
1453
1454	int rc = poll(&pfd[0], 2, cMilliesWait);
1455	Log(("usbProxyLinuxUrbReap: poll rc = %d\n", rc));
1456	if (rc >= 1)
1457	{
1458	/* If the pipe caused the return drain it. */
1459	if (pfd[1].revents & POLLIN)
1460	{
1461	uint8_t bRead;
1462	size_t cbIgnored = 0;
1463	RTPipeRead(pDevLnx->hPipeWakeupR, &bRead, 1, &cbIgnored);
1464	}
1465	break;
1466	}
1467	if (rc >= 0)
1468	return NULL;
1469
1470	if (errno != EAGAIN)
1471	{
1472	Log(("usb-linux: Reap URB - poll -> %d errno=%d pProxyDev=%s\n", rc, errno, usbProxyGetName(pProxyDev)));
1473	return NULL;
1474	}
1475	Log(("usbProxyLinuxUrbReap: poll again - weird!!!\n"));
1476	}
1477	}
1478
1479	/*
1480	* Reap URBs, non-blocking.
1481	*/
1482	for (;;)
1483	{
1484	struct usbdevfs_urb *pKUrb;
1485	while (ioctl(RTFileToNative(pDevLnx->hFile), USBDEVFS_REAPURBNDELAY, &pKUrb))
1486	if (errno != EINTR)
1487	{
1488	if (errno == ENODEV)
1489	usbProxLinuxUrbUnplugged(pProxyDev);
1490	else
1491	Log(("usb-linux: Reap URB. errno=%d pProxyDev=%s\n", errno, usbProxyGetName(pProxyDev)));
1492	return NULL;
1493	}
1494	pUrbLnx = (PUSBPROXYURBLNX)pKUrb;
1495
1496	/* split list: Is the entire split list done yet? */
1497	if (pUrbLnx->pSplitHead)
1498	{
1499	pUrbLnx->fSplitElementReaped = true;
1500
1501	/* for variable size URBs, we may need to queue more if the just-reaped URB was completely filled */
1502	if (pUrbLnx->cbSplitRemaining && (pKUrb->actual_length == pKUrb->buffer_length) && !pUrbLnx->pSplitNext)
1503	{
1504	bool fUnplugged = false;
1505	bool fSucceeded;
1506
1507	Assert(pUrbLnx->pSplitHead);
1508	Assert((pKUrb->endpoint & 0x80) && !(pKUrb->flags & USBDEVFS_URB_SHORT_NOT_OK));
1509	PUSBPROXYURBLNX pNew = usbProxyLinuxSplitURBFragment(pProxyDev, pUrbLnx->pSplitHead, pUrbLnx);
1510	if (!pNew)
1511	{
1512	Log(("usb-linux: Allocating URB fragment failed. errno=%d pProxyDev=%s\n", errno, usbProxyGetName(pProxyDev)));
1513	return NULL;
1514	}
1515	PVUSBURB pUrb = (PVUSBURB)pUrbLnx->KUrb.usercontext;
1516	fSucceeded = usbProxyLinuxSubmitURB(pProxyDev, pNew, pUrb, &fUnplugged);
1517	if (fUnplugged)
1518	usbProxLinuxUrbUnplugged(pProxyDev);
1519	if (!fSucceeded)
1520	return NULL;
1521	continue; /* try reaping another URB */
1522	}
1523	PUSBPROXYURBLNX pCur;
1524	for (pCur = pUrbLnx->pSplitHead; pCur; pCur = pCur->pSplitNext)
1525	if (!pCur->fSplitElementReaped)
1526	{
1527	pUrbLnx = NULL;
1528	break;
1529	}
1530	if (!pUrbLnx)
1531	continue;
1532	pUrbLnx = pUrbLnx->pSplitHead;
1533	}
1534	break;
1535	}
1536
1537	/*
1538	* Ok, we got one!
1539	*/
1540	PVUSBURB pUrb = (PVUSBURB)pUrbLnx->KUrb.usercontext;
1541	if ( pUrb
1542	&& !pUrbLnx->fCanceledBySubmit)
1543	{
1544	if (pUrbLnx->pSplitHead)
1545	{
1546	/* split - find the end byte and the first error status. */
1547	Assert(pUrbLnx == pUrbLnx->pSplitHead);
1548	uint8_t *pbEnd = &pUrb->abData[0];
1549	pUrb->enmStatus = VUSBSTATUS_OK;
1550	PUSBPROXYURBLNX pCur;
1551	for (pCur = pUrbLnx; pCur; pCur = pCur->pSplitNext)
1552	{
1553	if (pCur->KUrb.actual_length)
1554	pbEnd = (uint8_t *)pCur->KUrb.buffer + pCur->KUrb.actual_length;
1555	if (pUrb->enmStatus == VUSBSTATUS_OK)
1556	pUrb->enmStatus = vusbProxyLinuxUrbGetStatus(pCur);
1557	}
1558	pUrb->cbData = pbEnd - &pUrb->abData[0];
1559	usbProxyLinuxUrbUnlinkInFlight(pDevLnx, pUrbLnx);
1560	usbProxyLinuxUrbFreeSplitList(pProxyDev, pUrbLnx);
1561	}
1562	else
1563	{
1564	/* unsplit. */
1565	pUrb->enmStatus = vusbProxyLinuxUrbGetStatus(pUrbLnx);
1566	pUrb->cbData = pUrbLnx->KUrb.actual_length;
1567	if (pUrb->enmType == VUSBXFERTYPE_ISOC)
1568	{
1569	unsigned i, off;
1570	for (i = 0, off = 0; i < pUrb->cIsocPkts; i++)
1571	{
1572	#if RT_GNUC_PREREQ(4, 6)
1573	# pragma GCC diagnostic push
1574	# pragma GCC diagnostic ignored "-Warray-bounds"
1575	#endif
1576	pUrb->aIsocPkts[i].enmStatus = vusbProxyLinuxStatusToVUsbStatus(pUrbLnx->KUrb.iso_frame_desc[i].status);
1577	Assert(pUrb->aIsocPkts[i].off == off);
1578	pUrb->aIsocPkts[i].cb = pUrbLnx->KUrb.iso_frame_desc[i].actual_length;
1579	off += pUrbLnx->KUrb.iso_frame_desc[i].length;
1580	#if RT_GNUC_PREREQ(4, 6)
1581	# pragma GCC diagnostic pop
1582	#endif
1583	}
1584	}
1585	usbProxyLinuxUrbUnlinkInFlight(pDevLnx, pUrbLnx);
1586	usbProxyLinuxUrbFree(pProxyDev, pUrbLnx);
1587	}
1588	pUrb->Dev.pvPrivate = NULL;
1589
1590	/* some adjustments for message transfers. */
1591	if (pUrb->enmType == VUSBXFERTYPE_MSG)
1592	{
1593	pUrb->cbData += sizeof(VUSBSETUP);
1594	usbProxyLinuxUrbSwapSetup((PVUSBSETUP)pUrb->abData);
1595	}
1596	}
1597	else
1598	{
1599	usbProxyLinuxUrbUnlinkInFlight(pDevLnx, pUrbLnx);
1600	usbProxyLinuxUrbFree(pProxyDev, pUrbLnx);
1601	pUrb = NULL;
1602	}
1603
1604	LogFlow(("usbProxyLinuxUrbReap: pProxyDev=%s returns %p\n", usbProxyGetName(pProxyDev), pUrb));
1605	return pUrb;
1606	}
1607
1608
1609	/**
1610	* Cancels the URB.
1611	* The URB requires reaping, so we don't change its state.
1612	*/
1613	static DECLCALLBACK(int) usbProxyLinuxUrbCancel(PUSBPROXYDEV pProxyDev, PVUSBURB pUrb)
1614	{
1615	int rc = VINF_SUCCESS;
1616	PUSBPROXYURBLNX pUrbLnx = (PUSBPROXYURBLNX)pUrb->Dev.pvPrivate;
1617	if (pUrbLnx->pSplitHead)
1618	{
1619	/* split */
1620	Assert(pUrbLnx == pUrbLnx->pSplitHead);
1621	PUSBPROXYURBLNX pCur;
1622	for (pCur = pUrbLnx; pCur; pCur = pCur->pSplitNext)
1623	{
1624	if (pCur->fSplitElementReaped)
1625	continue;
1626	if ( !usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_DISCARDURB, &pCur->KUrb, true, UINT32_MAX)
1627	\|\| errno == ENOENT)
1628	continue;
1629	if (errno == ENODEV)
1630	break;
1631	/** @todo Think about how to handle errors wrt. to the status code. */
1632	Log(("usb-linux: Discard URB %p failed, errno=%d. pProxyDev=%s!!! (split)\n",
1633	pUrb, errno, usbProxyGetName(pProxyDev)));
1634	}
1635	}
1636	else
1637	{
1638	/* unsplit */
1639	if ( usbProxyLinuxDoIoCtl(pProxyDev, USBDEVFS_DISCARDURB, &pUrbLnx->KUrb, true, UINT32_MAX)
1640	&& errno != ENODEV /* deal with elsewhere. */
1641	&& errno != ENOENT)
1642	{
1643	Log(("usb-linux: Discard URB %p failed, errno=%d. pProxyDev=%s!!!\n",
1644	pUrb, errno, usbProxyGetName(pProxyDev)));
1645	rc = RTErrConvertFromErrno(errno);
1646	}
1647	}
1648
1649	return rc;
1650	}
1651
1652
1653	static DECLCALLBACK(int) usbProxyLinuxWakeup(PUSBPROXYDEV pProxyDev)
1654	{
1655	PUSBPROXYDEVLNX pDevLnx = USBPROXYDEV_2_DATA(pProxyDev, PUSBPROXYDEVLNX);
1656	size_t cbIgnored;
1657
1658	LogFlowFunc(("pProxyDev=%p\n", pProxyDev));
1659
1660	return RTPipeWrite(pDevLnx->hPipeWakeupW, "", 1, &cbIgnored);
1661	}
1662
1663	/**
1664	* The Linux USB Proxy Backend.
1665	*/
1666	const USBPROXYBACK g_USBProxyDeviceHost =
1667	{
1668	/* pszName */
1669	"host",
1670	/* cbBackend */
1671	sizeof(USBPROXYDEVLNX),
1672	usbProxyLinuxOpen,
1673	usbProxyLinuxInit,
1674	usbProxyLinuxClose,
1675	usbProxyLinuxReset,
1676	usbProxyLinuxSetConfig,
1677	usbProxyLinuxClaimInterface,
1678	usbProxyLinuxReleaseInterface,
1679	usbProxyLinuxSetInterface,
1680	usbProxyLinuxClearHaltedEp,
1681	usbProxyLinuxUrbQueue,
1682	usbProxyLinuxUrbCancel,
1683	usbProxyLinuxUrbReap,
1684	usbProxyLinuxWakeup,
1685	0
1686	};
1687
1688
1689	/*
1690	* Local Variables:
1691	* mode: c
1692	* c-file-style: "bsd"
1693	* c-basic-offset: 4
1694	* End:
1695	*/
1696

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source: vbox/trunk/src/VBox/Devices/USB/linux/USBProxyDevice-linux.cpp@ 90791

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