VBoxGuest-linux.c@ 100360

Last change on this file since 100360 was 100268, checked in by vboxsync, 17 months ago
Additions: Make the R0 physical heap configurable to allow for allocations >= 4GiB if supported by the VBox device (the MMIO request path is available), add support for the MMIO request path required for ARM, bugref:10457 [fix]
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 48.5 KB

Line
1	/* $Id: VBoxGuest-linux.c 100268 2023-06-23 14:59:56Z vboxsync $ */
2	/** @file
3	* VBoxGuest - Linux specifics.
4	*
5	* Note. Unfortunately, the difference between this and SUPDrv-linux.c is
6	* a little bit too big to be helpful.
7	*/
8
9	/*
10	* Copyright (C) 2006-2023 Oracle and/or its affiliates.
11	*
12	* This file is part of VirtualBox base platform packages, as
13	* available from https://www.virtualbox.org.
14	*
15	* This program is free software; you can redistribute it and/or
16	* modify it under the terms of the GNU General Public License
17	* as published by the Free Software Foundation, in version 3 of the
18	* License.
19	*
20	* This program is distributed in the hope that it will be useful, but
21	* WITHOUT ANY WARRANTY; without even the implied warranty of
22	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23	* General Public License for more details.
24	*
25	* You should have received a copy of the GNU General Public License
26	* along with this program; if not, see <https://www.gnu.org/licenses>.
27	*
28	* The contents of this file may alternatively be used under the terms
29	* of the Common Development and Distribution License Version 1.0
30	* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
31	* in the VirtualBox distribution, in which case the provisions of the
32	* CDDL are applicable instead of those of the GPL.
33	*
34	* You may elect to license modified versions of this file under the
35	* terms and conditions of either the GPL or the CDDL or both.
36	*
37	* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
38	*/
39
40
41	/*********************************************************************************************************************************
42	* Header Files *
43	*********************************************************************************************************************************/
44	#define LOG_GROUP LOG_GROUP_SUP_DRV
45
46	#include "the-linux-kernel.h"
47
48	#if RTLNX_VER_MIN(2,6,15)
49	# define VBOXGUEST_WITH_INPUT_DRIVER
50	#endif
51
52	#if RTLNX_VER_MIN(4,15,0)
53	# define CONST_4_15 const
54	#else
55	# define CONST_4_15
56	#endif
57
58	#include "VBoxGuestInternal.h"
59	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
60	# include <linux/input.h>
61	#endif
62	#include <linux/miscdevice.h>
63	#include <linux/poll.h>
64	#if RTLNX_VER_MIN(2,6,28)
65	# include <linux/tty.h>
66	#endif
67	#include <VBox/version.h>
68	#include "revision-generated.h"
69
70	#include <iprt/assert.h>
71	#include <iprt/asm.h>
72	#include <iprt/ctype.h>
73	#include <iprt/initterm.h>
74	#include <iprt/mem.h>
75	#include <iprt/mp.h>
76	#include <iprt/process.h>
77	#include <iprt/spinlock.h>
78	#include <iprt/semaphore.h>
79	#include <iprt/string.h>
80	#include <VBox/err.h>
81	#include <VBox/log.h>
82
83
84	/*********************************************************************************************************************************
85	* Defined Constants And Macros *
86	*********************************************************************************************************************************/
87	/** The device name. */
88	#define DEVICE_NAME "vboxguest"
89	/** The device name for the device node open to everyone. */
90	#define DEVICE_NAME_USER "vboxuser"
91	/** The name of the PCI driver */
92	#define DRIVER_NAME DEVICE_NAME
93
94
95	/* 2.4.x compatibility macros that may or may not be defined. */
96	#ifndef IRQ_RETVAL
97	# define irqreturn_t void
98	# define IRQ_RETVAL(n)
99	#endif
100
101	/* uidgid.h was introduced in 3.5.0. */
102	#if RTLNX_VER_MAX(3,5,0)
103	# define kgid_t gid_t
104	# define kuid_t uid_t
105	#endif
106
107	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
108	/** The name of input pointing device for mouse integration. */
109	# define VBOX_INPUT_DEVICE_NAME "VirtualBox mouse integration"
110	#endif
111
112
113	/*********************************************************************************************************************************
114	* Internal Functions *
115	*********************************************************************************************************************************/
116	static void vgdrvLinuxTermPci(struct pci_dev *pPciDev);
117	static int vgdrvLinuxProbePci(struct pci_dev pPciDev, const struct pci_device_id id);
118	static int __init vgdrvLinuxModInit(void);
119	static void __exit vgdrvLinuxModExit(void);
120	static int vgdrvLinuxOpen(struct inode pInode, struct file pFilp);
121	static int vgdrvLinuxRelease(struct inode pInode, struct file pFilp);
122	#ifdef HAVE_UNLOCKED_IOCTL
123	static long vgdrvLinuxIOCtl(struct file *pFilp, unsigned int uCmd, unsigned long ulArg);
124	#else
125	static int vgdrvLinuxIOCtl(struct inode pInode, struct file pFilp, unsigned int uCmd, unsigned long ulArg);
126	#endif
127	static int vgdrvLinuxIOCtlSlow(struct file *pFilp, unsigned int uCmd, unsigned long ulArg, PVBOXGUESTSESSION pSession);
128	static int vgdrvLinuxFAsync(int fd, struct file *pFile, int fOn);
129	static unsigned int vgdrvLinuxPoll(struct file pFile, poll_table pPt);
130	static ssize_t vgdrvLinuxRead(struct file pFile, char pbBuf, size_t cbRead, loff_t *poff);
131
132
133	/*********************************************************************************************************************************
134	* Global Variables *
135	*********************************************************************************************************************************/
136	/**
137	* Device extention & session data association structure.
138	*/
139	static VBOXGUESTDEVEXT g_DevExt;
140	/** The PCI device. */
141	static struct pci_dev *g_pPciDev = NULL;
142	/** The base of the I/O port range. */
143	static RTIOPORT g_IOPortBase;
144	/** The base of the MMIO range. */
145	static RTHCPHYS g_MMIOPhysAddr = NIL_RTHCPHYS;
146	/** The size of the MMIO range as seen by PCI. */
147	static uint32_t g_cbMMIO;
148	/** The pointer to the mapping of the MMIO range. */
149	static void *g_pvMMIOBase;
150
151	static RTHCPHYS g_MmioReqPhysAddr = NIL_RTHCPHYS;
152	static uint32_t g_cbMmioReq;
153	static void *g_pvMmioReq = NULL;
154
155	/** Wait queue used by polling. */
156	static wait_queue_head_t g_PollEventQueue;
157	/** Asynchronous notification stuff. */
158	static struct fasync_struct *g_pFAsyncQueue;
159	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
160	/** Pre-allocated mouse status VMMDev requests for use in the IRQ handler. */
161	static VMMDevReqMouseStatusEx *g_pMouseStatusReqEx;
162	#endif
163	#if RTLNX_VER_MIN(2,6,0)
164	/** Whether we've create the logger or not. */
165	static volatile bool g_fLoggerCreated;
166	/** Release logger group settings. */
167	static char g_szLogGrp[128];
168	/** Release logger flags settings. */
169	static char g_szLogFlags[128];
170	/** Release logger destination settings. */
171	static char g_szLogDst[128];
172	# if 0
173	/** Debug logger group settings. */
174	static char g_szDbgLogGrp[128];
175	/** Debug logger flags settings. */
176	static char g_szDbgLogFlags[128];
177	/** Debug logger destination settings. */
178	static char g_szDbgLogDst[128];
179	# endif
180	#endif
181
182	/** The input device handle */
183	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
184	static struct input_dev *g_pInputDevice = NULL;
185	#endif
186
187	/** The file_operations structure. */
188	static struct file_operations g_FileOps =
189	{
190	owner: THIS_MODULE,
191	open: vgdrvLinuxOpen,
192	release: vgdrvLinuxRelease,
193	#ifdef HAVE_UNLOCKED_IOCTL
194	unlocked_ioctl: vgdrvLinuxIOCtl,
195	#else
196	ioctl: vgdrvLinuxIOCtl,
197	#endif
198	fasync: vgdrvLinuxFAsync,
199	read: vgdrvLinuxRead,
200	poll: vgdrvLinuxPoll,
201	llseek: no_llseek,
202	};
203
204	/** The miscdevice structure. */
205	static struct miscdevice g_MiscDevice =
206	{
207	minor: MISC_DYNAMIC_MINOR,
208	name: DEVICE_NAME,
209	fops: &g_FileOps,
210	};
211
212	/** The file_operations structure for the user device.
213	* @remarks For the time being we'll be using the same implementation as
214	* /dev/vboxguest here. */
215	static struct file_operations g_FileOpsUser =
216	{
217	owner: THIS_MODULE,
218	open: vgdrvLinuxOpen,
219	release: vgdrvLinuxRelease,
220	#ifdef HAVE_UNLOCKED_IOCTL
221	unlocked_ioctl: vgdrvLinuxIOCtl,
222	#else
223	ioctl: vgdrvLinuxIOCtl,
224	#endif
225	};
226
227	/** The miscdevice structure for the user device. */
228	static struct miscdevice g_MiscDeviceUser =
229	{
230	minor: MISC_DYNAMIC_MINOR,
231	name: DEVICE_NAME_USER,
232	fops: &g_FileOpsUser,
233	};
234
235
236	/** PCI hotplug structure. */
237	static const struct pci_device_id g_VBoxGuestPciId[] =
238	{
239	{
240	vendor: VMMDEV_VENDORID,
241	device: VMMDEV_DEVICEID
242	},
243	{
244	/* empty entry */
245	}
246	};
247
248	MODULE_DEVICE_TABLE(pci, g_VBoxGuestPciId);
249
250	/** Structure for registering the PCI driver. */
251	static struct pci_driver g_PciDriver =
252	{
253	name: DRIVER_NAME,
254	id_table: g_VBoxGuestPciId,
255	probe: vgdrvLinuxProbePci,
256	remove: vgdrvLinuxTermPci
257	};
258
259	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
260	/** Kernel IDC session to ourselves for use with the mouse events. */
261	static PVBOXGUESTSESSION g_pKernelSession = NULL;
262	#endif
263
264
265
266	/**
267	* Converts a VBox status code to a linux error code.
268	*
269	* @returns corresponding negative linux error code.
270	* @param rc supdrv error code (SUPDRV_ERR_* defines).
271	*/
272	static int vgdrvLinuxConvertToNegErrno(int rc)
273	{
274	if ( rc > -1000
275	&& rc < 1000)
276	return -RTErrConvertToErrno(rc);
277	switch (rc)
278	{
279	case VERR_HGCM_SERVICE_NOT_FOUND: return -ESRCH;
280	case VINF_HGCM_CLIENT_REJECTED: return 0;
281	case VERR_HGCM_INVALID_CMD_ADDRESS: return -EFAULT;
282	case VINF_HGCM_ASYNC_EXECUTE: return 0;
283	case VERR_HGCM_INTERNAL: return -EPROTO;
284	case VERR_HGCM_INVALID_CLIENT_ID: return -EINVAL;
285	case VINF_HGCM_SAVE_STATE: return 0;
286	/* No reason to return this to a guest */
287	// case VERR_HGCM_SERVICE_EXISTS: return -EEXIST;
288	default:
289	AssertMsgFailed(("Unhandled error code %Rrc\n", rc));
290	return -EPROTO;
291	}
292	}
293
294
295	#if defined(RT_ARCH_ARM64) \|\| defined(RT_ARCH_ARM32)
296	static int vgdrvLinuxMapMmio(struct pci_dev *pPciDev)
297	{
298	g_MmioReqPhysAddr = pci_resource_start(pPciDev, 3);
299	g_cbMmioReq = pci_resource_len(pPciDev, 3);
300	if (request_mem_region(g_MmioReqPhysAddr, g_cbMmioReq, DEVICE_NAME) != NULL)
301	{
302	g_pvMmioReq = ioremap(g_MmioReqPhysAddr, g_cbMmioReq);
303	if (g_pvMmioReq)
304	return 0;
305
306	/* failure cleanup path */
307	LogRel((DEVICE_NAME ": ioremap failed; MMIO Addr=%RHp cb=%#x\n", g_MmioReqPhysAddr, g_cbMmioReq));
308	release_mem_region(g_MmioReqPhysAddr, g_cbMmioReq);
309	return -ENOMEM;
310	}
311	else
312	LogRel((DEVICE_NAME ": failed to obtain adapter memory\n"));
313
314	return -EBUSY;
315	}
316	#endif
317
318
319	/**
320	* Does the PCI detection and init of the device.
321	*
322	* @returns 0 on success, negated errno on failure.
323	*/
324	static int vgdrvLinuxProbePci(struct pci_dev pPciDev, const struct pci_device_id id)
325	{
326	int rc;
327
328	NOREF(id);
329	AssertReturn(!g_pPciDev, -EINVAL);
330	rc = pci_enable_device(pPciDev);
331	if (rc >= 0)
332	{
333	#if defined(RT_ARCH_AMD64) \|\| defined(RT_ARCH_X86)
334	/* I/O Ports are mandatory, the MMIO bit is not. */
335	g_IOPortBase = pci_resource_start(pPciDev, 0);
336	if (g_IOPortBase != 0)
337	#elif defined(RT_ARCH_ARM64) \|\| defined(RT_ARCH_ARM32)
338	rc = vgdrvLinuxMapMmio(pPciDev);
339	if (!rc)
340	#else
341	# error "I have no memory of this arechitecture"
342	#endif
343	{
344	/*
345	* Map the register address space.
346	*/
347	g_MMIOPhysAddr = pci_resource_start(pPciDev, 1);
348	g_cbMMIO = pci_resource_len(pPciDev, 1);
349	if (request_mem_region(g_MMIOPhysAddr, g_cbMMIO, DEVICE_NAME) != NULL)
350	{
351	g_pvMMIOBase = ioremap(g_MMIOPhysAddr, g_cbMMIO);
352	if (g_pvMMIOBase)
353	{
354	/** @todo why aren't we requesting ownership of the I/O ports as well? */
355	g_pPciDev = pPciDev;
356	return 0;
357	}
358
359	/* failure cleanup path */
360	LogRel((DEVICE_NAME ": ioremap failed; MMIO Addr=%RHp cb=%#x\n", g_MMIOPhysAddr, g_cbMMIO));
361	rc = -ENOMEM;
362	release_mem_region(g_MMIOPhysAddr, g_cbMMIO);
363	}
364	else
365	{
366	LogRel((DEVICE_NAME ": failed to obtain adapter memory\n"));
367	rc = -EBUSY;
368	}
369	g_MMIOPhysAddr = NIL_RTHCPHYS;
370	g_cbMMIO = 0;
371	g_IOPortBase = 0;
372	}
373	else
374	{
375	LogRel((DEVICE_NAME ": did not find expected hardware resources\n"));
376	rc = -ENXIO;
377	}
378	pci_disable_device(pPciDev);
379	}
380	else
381	LogRel((DEVICE_NAME ": could not enable device: %d\n", rc));
382	return rc;
383	}
384
385
386	/**
387	* Clean up the usage of the PCI device.
388	*/
389	static void vgdrvLinuxTermPci(struct pci_dev *pPciDev)
390	{
391	g_pPciDev = NULL;
392	if (pPciDev)
393	{
394	if (g_pvMmioReq)
395	{
396	iounmap(g_pvMmioReq);
397	g_pvMmioReq = NULL;
398
399	release_mem_region(g_MmioReqPhysAddr, g_cbMmioReq);
400	g_MmioReqPhysAddr = NIL_RTHCPHYS;
401	g_cbMmioReq = 0;
402	}
403
404	iounmap(g_pvMMIOBase);
405	g_pvMMIOBase = NULL;
406
407	release_mem_region(g_MMIOPhysAddr, g_cbMMIO);
408	g_MMIOPhysAddr = NIL_RTHCPHYS;
409	g_cbMMIO = 0;
410
411	pci_disable_device(pPciDev);
412	}
413	}
414
415
416	/**
417	* Interrupt service routine.
418	*
419	* @returns In 2.4 it returns void.
420	* In 2.6 we indicate whether we've handled the IRQ or not.
421	*
422	* @param iIrq The IRQ number.
423	* @param pvDevId The device ID, a pointer to g_DevExt.
424	* @param pRegs Register set. Removed in 2.6.19.
425	*/
426	#if RTLNX_VER_MIN(2,6,19) && !defined(DOXYGEN_RUNNING)
427	static irqreturn_t vgdrvLinuxISR(int iIrq, void *pvDevId)
428	#else
429	static irqreturn_t vgdrvLinuxISR(int iIrq, void pvDevId, struct pt_regs pRegs)
430	#endif
431	{
432	bool fTaken = VGDrvCommonISR(&g_DevExt);
433	return IRQ_RETVAL(fTaken);
434	}
435
436
437	/**
438	* Registers the ISR and initializes the poll wait queue.
439	*/
440	static int __init vgdrvLinuxInitISR(void)
441	{
442	int rc;
443
444	init_waitqueue_head(&g_PollEventQueue);
445	rc = request_irq(g_pPciDev->irq,
446	vgdrvLinuxISR,
447	#if RTLNX_VER_MIN(2,6,20)
448	IRQF_SHARED,
449	#else
450	SA_SHIRQ,
451	#endif
452	DEVICE_NAME,
453	&g_DevExt);
454	if (rc)
455	{
456	LogRel((DEVICE_NAME ": could not request IRQ %d: err=%d\n", g_pPciDev->irq, rc));
457	return rc;
458	}
459	return 0;
460	}
461
462
463	/**
464	* Deregisters the ISR.
465	*/
466	static void vgdrvLinuxTermISR(void)
467	{
468	free_irq(g_pPciDev->irq, &g_DevExt);
469	}
470
471	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
472
473	/**
474	* Check if extended mouse pointer state request protocol is currently used by driver.
475	*
476	* @returns True if extended protocol is used, False otherwise.
477	*/
478	static bool vgdrvLinuxUsesMouseStatusEx(void)
479	{
480	return g_pMouseStatusReqEx->Core.header.requestType == VMMDevReq_GetMouseStatusEx;
481	}
482
483	/**
484	* Reports the mouse integration status to the host.
485	*
486	* Calls the kernel IOCtl to report mouse status to the host on behalf of
487	* our kernel session.
488	*
489	* @param fStatus The mouse status to report.
490	*/
491	static int vgdrvLinuxSetMouseStatus(uint32_t fStatus)
492	{
493	int rc;
494	VBGLIOCSETMOUSESTATUS Req;
495	VBGLREQHDR_INIT(&Req.Hdr, SET_MOUSE_STATUS);
496	Req.u.In.fStatus = fStatus;
497	rc = VGDrvCommonIoCtl(VBGL_IOCTL_SET_MOUSE_STATUS, &g_DevExt, g_pKernelSession, &Req.Hdr, sizeof(Req));
498	if (RT_SUCCESS(rc))
499	rc = Req.Hdr.rc;
500	return rc;
501	}
502
503
504	/**
505	* Called when the input device is first opened.
506	*
507	* Sets up absolute mouse reporting.
508	*/
509	static int vboxguestOpenInputDevice(struct input_dev *pDev)
510	{
511	int rc = vgdrvLinuxSetMouseStatus( VMMDEV_MOUSE_GUEST_CAN_ABSOLUTE
512	\| VMMDEV_MOUSE_NEW_PROTOCOL
513	\| (vgdrvLinuxUsesMouseStatusEx() ? VMMDEV_MOUSE_GUEST_USES_FULL_STATE_PROTOCOL : 0));
514	if (RT_FAILURE(rc))
515	return ENODEV;
516	NOREF(pDev);
517	return 0;
518	}
519
520
521	/**
522	* Called if all open handles to the input device are closed.
523	*
524	* Disables absolute reporting.
525	*/
526	static void vboxguestCloseInputDevice(struct input_dev *pDev)
527	{
528	NOREF(pDev);
529	vgdrvLinuxSetMouseStatus(0);
530	}
531
532
533	/**
534	* Free corresponding mouse status request structure.
535	*/
536	static void vgdrvLinuxFreeMouseStatusReq(void)
537	{
538	VbglR0GRFree(&g_pMouseStatusReqEx->Core.header);
539	g_pMouseStatusReqEx = NULL;
540	}
541
542
543	/**
544	* Creates the kernel input device.
545	*/
546	static int __init vgdrvLinuxCreateInputDevice(void)
547	{
548	/* Try to allocate legacy request data first, and check if host supports extended protocol. */
549	int rc = VbglR0GRAlloc((VMMDevRequestHeader **)&g_pMouseStatusReqEx, sizeof(VMMDevReqMouseStatus), VMMDevReq_GetMouseStatus);
550	if (RT_SUCCESS(rc))
551	{
552	/* Check if host supports extended mouse state reporting. */
553	g_pMouseStatusReqEx->Core.mouseFeatures = 0;
554	rc = VbglR0GRPerform(&g_pMouseStatusReqEx->Core.header);
555	if (RT_SUCCESS(rc))
556	{
557	if (g_pMouseStatusReqEx->Core.mouseFeatures & VMMDEV_MOUSE_HOST_SUPPORTS_FULL_STATE_PROTOCOL)
558	{
559	VMMDevReqMouseStatusEx *pReqEx = NULL;
560	rc = VbglR0GRAlloc((VMMDevRequestHeader *)&pReqEx, sizeof(pReqEx), VMMDevReq_GetMouseStatusEx);
561	if (RT_SUCCESS(rc))
562	{
563	/* De-allocate legacy request data, */
564	VbglR0GRFree(&g_pMouseStatusReqEx->Core.header);
565	/* ..and switch to extended requests. */
566	g_pMouseStatusReqEx = pReqEx;
567	LogRel(("Host supports full mouse state reporting, switching to extended mouse integration protocol\n"));
568	}
569	else
570	LogRel(("Host supports full mouse state reporting, but feature cannot be initialized, switching to legacy mouse integration protocol\n"));
571	}
572	else
573	LogRel(("Host does not support full mouse state reporting, switching to legacy mouse integration protocol\n"));
574	}
575	else
576	LogRel(("Unable to get host mouse capabilities, switching to legacy mouse integration protocol\n"));
577	}
578	else
579	rc = -ENOMEM;
580
581	if (RT_SUCCESS(rc))
582	{
583	g_pInputDevice = input_allocate_device();
584	if (g_pInputDevice)
585	{
586	g_pInputDevice->name = VBOX_INPUT_DEVICE_NAME;
587	g_pInputDevice->id.bustype = BUS_PCI;
588	g_pInputDevice->id.vendor = VMMDEV_VENDORID;
589	g_pInputDevice->id.product = VMMDEV_DEVICEID;
590	g_pInputDevice->id.version = VBOX_SHORT_VERSION;
591	g_pInputDevice->open = vboxguestOpenInputDevice;
592	g_pInputDevice->close = vboxguestCloseInputDevice;
593	# if RTLNX_VER_MAX(2,6,22)
594	g_pInputDevice->cdev.dev = &g_pPciDev->dev;
595	# else
596	g_pInputDevice->dev.parent = &g_pPciDev->dev;
597	# endif
598	/* Set up input device capabilities. */
599	ASMBitSet(g_pInputDevice->evbit, EV_ABS);
600	ASMBitSet(g_pInputDevice->evbit, EV_KEY);
601	# ifdef EV_SYN
602	ASMBitSet(g_pInputDevice->evbit, EV_SYN);
603	# endif
604	ASMBitSet(g_pInputDevice->absbit, ABS_X);
605	ASMBitSet(g_pInputDevice->absbit, ABS_Y);
606
607	input_set_abs_params(g_pInputDevice, ABS_X, VMMDEV_MOUSE_RANGE_MIN, VMMDEV_MOUSE_RANGE_MAX, 0, 0);
608	input_set_abs_params(g_pInputDevice, ABS_Y, VMMDEV_MOUSE_RANGE_MIN, VMMDEV_MOUSE_RANGE_MAX, 0, 0);
609
610	ASMBitSet(g_pInputDevice->keybit, BTN_MOUSE);
611
612	/* Report extra capabilities to input layer if extended mouse state protocol
613	* will be used in communication with host. */
614	if (vgdrvLinuxUsesMouseStatusEx())
615	{
616	ASMBitSet(g_pInputDevice->evbit, EV_REL);
617	ASMBitSet(g_pInputDevice->evbit, EV_KEY);
618
619	ASMBitSet(g_pInputDevice->relbit, REL_WHEEL);
620	ASMBitSet(g_pInputDevice->relbit, REL_HWHEEL);
621
622	ASMBitSet(g_pInputDevice->keybit, BTN_LEFT);
623	ASMBitSet(g_pInputDevice->keybit, BTN_RIGHT);
624	ASMBitSet(g_pInputDevice->keybit, BTN_MIDDLE);
625	ASMBitSet(g_pInputDevice->keybit, BTN_SIDE);
626	ASMBitSet(g_pInputDevice->keybit, BTN_EXTRA);
627	}
628
629	rc = input_register_device(g_pInputDevice);
630	if (rc == 0)
631	return 0;
632
633	input_free_device(g_pInputDevice);
634	}
635	else
636	rc = -ENOMEM;
637
638	vgdrvLinuxFreeMouseStatusReq();
639	}
640
641	return rc;
642	}
643
644
645	/**
646	* Terminates the kernel input device.
647	*/
648	static void vgdrvLinuxTermInputDevice(void)
649	{
650	/* Notify host that mouse integration is no longer available. */
651	vgdrvLinuxSetMouseStatus(0);
652
653	vgdrvLinuxFreeMouseStatusReq();
654
655	/* See documentation of input_register_device(): input_free_device()
656	* should not be called after a device has been registered. */
657	input_unregister_device(g_pInputDevice);
658	}
659
660	#endif /* VBOXGUEST_WITH_INPUT_DRIVER */
661
662	/**
663	* Creates the device nodes.
664	*
665	* @returns 0 on success, negated errno on failure.
666	*/
667	static int __init vgdrvLinuxInitDeviceNodes(void)
668	{
669	/*
670	* The full feature device node.
671	*/
672	int rc = misc_register(&g_MiscDevice);
673	if (!rc)
674	{
675	/*
676	* The device node intended to be accessible by all users.
677	*/
678	rc = misc_register(&g_MiscDeviceUser);
679	if (!rc)
680	return 0;
681	LogRel((DEVICE_NAME ": misc_register failed for %s (rc=%d)\n", DEVICE_NAME_USER, rc));
682	misc_deregister(&g_MiscDevice);
683	}
684	else
685	LogRel((DEVICE_NAME ": misc_register failed for %s (rc=%d)\n", DEVICE_NAME, rc));
686	return rc;
687	}
688
689
690	/**
691	* Deregisters the device nodes.
692	*/
693	static void vgdrvLinuxTermDeviceNodes(void)
694	{
695	misc_deregister(&g_MiscDevice);
696	misc_deregister(&g_MiscDeviceUser);
697	}
698
699
700	/**
701	* Initialize module.
702	*
703	* @returns appropriate status code.
704	*/
705	static int __init vgdrvLinuxModInit(void)
706	{
707	static const char * const s_apszGroups[] = VBOX_LOGGROUP_NAMES;
708	PRTLOGGER pRelLogger;
709	int rc;
710
711	/*
712	* Initialize IPRT first.
713	*/
714	rc = RTR0Init(0);
715	if (RT_FAILURE(rc))
716	{
717	printk(KERN_ERR DEVICE_NAME ": RTR0Init failed, rc=%d.\n", rc);
718	return -EINVAL;
719	}
720
721	/*
722	* Create the release log.
723	* (We do that here instead of common code because we want to log
724	* early failures using the LogRel macro.)
725	*/
726	rc = RTLogCreate(&pRelLogger, 0 /* fFlags */, "all",
727	"VBOX_RELEASE_LOG", RT_ELEMENTS(s_apszGroups), s_apszGroups,
728	RTLOGDEST_STDOUT \| RTLOGDEST_DEBUGGER \| RTLOGDEST_USER, NULL);
729	if (RT_SUCCESS(rc))
730	{
731	#if RTLNX_VER_MIN(2,6,0)
732	RTLogGroupSettings(pRelLogger, g_szLogGrp);
733	RTLogFlags(pRelLogger, g_szLogFlags);
734	RTLogDestinations(pRelLogger, g_szLogDst);
735	#endif
736	RTLogRelSetDefaultInstance(pRelLogger);
737	}
738	#if RTLNX_VER_MIN(2,6,0)
739	g_fLoggerCreated = true;
740	#endif
741
742	/*
743	* Locate and initialize the PCI device.
744	*/
745	rc = pci_register_driver(&g_PciDriver);
746	if (rc >= 0 && g_pPciDev)
747	{
748	/*
749	* Call the common device extension initializer.
750	*/
751	#if RTLNX_VER_MIN(2,6,0) && (defined(RT_ARCH_X86) \|\| defined(RT_ARCH_ARM32))
752	VBOXOSTYPE enmOSType = VBOXOSTYPE_Linux26;
753	#elif RTLNX_VER_MIN(2,6,0) && (defined(RT_ARCH_AMD64) \|\| defined(RT_ARCH_ARM64))
754	VBOXOSTYPE enmOSType = VBOXOSTYPE_Linux26_x64;
755	#elif RTLNX_VER_MIN(2,4,0) && defined(RT_ARCH_X86)
756	VBOXOSTYPE enmOSType = VBOXOSTYPE_Linux24;
757	#elif RTLNX_VER_MIN(2,4,0) && defined(RT_ARCH_AMD64)
758	VBOXOSTYPE enmOSType = VBOXOSTYPE_Linux24_x64;
759	#else
760	# warning "huh? which arch + version is this?"
761	VBOXOSTYPE enmOsType = VBOXOSTYPE_Linux;
762	#endif
763	rc = VGDrvCommonInitDevExt(&g_DevExt,
764	g_IOPortBase,
765	g_pvMmioReq,
766	g_pvMMIOBase,
767	g_cbMMIO,
768	enmOSType,
769	VMMDEV_EVENT_MOUSE_POSITION_CHANGED);
770	if (RT_SUCCESS(rc))
771	{
772	/*
773	* Register the interrupt service routine for it now that g_DevExt can handle IRQs.
774	*/
775	rc = vgdrvLinuxInitISR();
776	if (rc >= 0) /** @todo r=bird: status check differs from that inside vgdrvLinuxInitISR. */
777	{
778	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
779	/*
780	* Create the kernel session for this driver.
781	*/
782	rc = VGDrvCommonCreateKernelSession(&g_DevExt, &g_pKernelSession);
783	if (RT_SUCCESS(rc))
784	{
785	/*
786	* Create the kernel input device.
787	*/
788	rc = vgdrvLinuxCreateInputDevice();
789	if (rc >= 0)
790	{
791	#endif
792	/*
793	* Read host configuration.
794	*/
795	VGDrvCommonProcessOptionsFromHost(&g_DevExt);
796
797	/*
798	* Finally, create the device nodes.
799	*/
800	rc = vgdrvLinuxInitDeviceNodes();
801	if (rc >= 0)
802	{
803	/* some useful information for the user but don't show this on the console */
804	LogRel((DEVICE_NAME ": Successfully loaded version " VBOX_VERSION_STRING " r" __stringify(VBOX_SVN_REV) "\n"));
805	LogRel((DEVICE_NAME ": misc device minor %d, IRQ %d, I/O port %RTiop, MMIO at %RHp (size 0x%x)\n",
806	g_MiscDevice.minor, g_pPciDev->irq, g_IOPortBase, g_MMIOPhysAddr, g_cbMMIO));
807	printk(KERN_DEBUG DEVICE_NAME ": Successfully loaded version "
808	VBOX_VERSION_STRING " r" __stringify(VBOX_SVN_REV) " (interface " RT_XSTR(VMMDEV_VERSION) ")\n");
809	return rc;
810	}
811
812	/* bail out */
813	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
814	vgdrvLinuxTermInputDevice();
815	}
816	else
817	{
818	LogRel((DEVICE_NAME ": vboxguestCreateInputDevice failed with rc=%Rrc\n", rc));
819	rc = RTErrConvertFromErrno(rc);
820	}
821	VGDrvCommonCloseSession(&g_DevExt, g_pKernelSession);
822	}
823	#endif
824	vgdrvLinuxTermISR();
825	}
826	VGDrvCommonDeleteDevExt(&g_DevExt);
827	}
828	else
829	{
830	LogRel((DEVICE_NAME ": VGDrvCommonInitDevExt failed with rc=%Rrc\n", rc));
831	rc = RTErrConvertFromErrno(rc);
832	}
833	}
834	else
835	{
836	LogRel((DEVICE_NAME ": PCI device not found, probably running on physical hardware.\n"));
837	rc = -ENODEV;
838	}
839	pci_unregister_driver(&g_PciDriver);
840	RTLogDestroy(RTLogRelSetDefaultInstance(NULL));
841	RTLogDestroy(RTLogSetDefaultInstance(NULL));
842	RTR0Term();
843	return rc;
844	}
845
846
847	/**
848	* Unload the module.
849	*/
850	static void __exit vgdrvLinuxModExit(void)
851	{
852	/*
853	* Inverse order of init.
854	*/
855	vgdrvLinuxTermDeviceNodes();
856	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
857	vgdrvLinuxTermInputDevice();
858	VGDrvCommonCloseSession(&g_DevExt, g_pKernelSession);
859	#endif
860	vgdrvLinuxTermISR();
861	VGDrvCommonDeleteDevExt(&g_DevExt);
862	pci_unregister_driver(&g_PciDriver);
863	RTLogDestroy(RTLogRelSetDefaultInstance(NULL));
864	RTLogDestroy(RTLogSetDefaultInstance(NULL));
865	RTR0Term();
866	}
867
868
869	/**
870	* Get the process user ID.
871	*
872	* @returns UID.
873	*/
874	DECLINLINE(RTUID) vgdrvLinuxGetUid(void)
875	{
876	#if RTLNX_VER_MIN(2,6,29)
877	# if RTLNX_VER_MIN(3,5,0)
878	return from_kuid(current_user_ns(), current->cred->uid);
879	# else
880	return current->cred->uid;
881	# endif
882	#else
883	return current->uid;
884	#endif
885	}
886
887
888	/**
889	* Checks if the given group number is zero or not.
890	*
891	* @returns true / false.
892	* @param gid The group to check for.
893	*/
894	DECLINLINE(bool) vgdrvLinuxIsGroupZero(kgid_t gid)
895	{
896	#if RTLNX_VER_MIN(3,5,0)
897	return from_kgid(current_user_ns(), gid);
898	#else
899	return gid == 0;
900	#endif
901	}
902
903
904	/**
905	* Searches the effective group and supplementary groups for @a gid.
906	*
907	* @returns true if member, false if not.
908	* @param gid The group to check for.
909	*/
910	DECLINLINE(RTGID) vgdrvLinuxIsInGroupEff(kgid_t gid)
911	{
912	return in_egroup_p(gid) != 0;
913	}
914
915
916	/**
917	* Check if we can positively or negatively determine that the process is
918	* running under a login on the physical machine console.
919	*
920	* Havne't found a good way to figure this out for graphical sessions, so this
921	* is mostly pointless. But let us try do what we can do.
922	*
923	* @returns VMMDEV_REQUESTOR_CON_XXX.
924	*/
925	static uint32_t vgdrvLinuxRequestorOnConsole(void)
926	{
927	uint32_t fRet = VMMDEV_REQUESTOR_CON_DONT_KNOW;
928
929	#if RTLNX_VER_MIN(2,6,28) /* First with tty_kref_put(). */
930	/*
931	* Check for tty0..63, ASSUMING that these are only used for the physical console.
932	*/
933	struct tty_struct *pTty = get_current_tty();
934	if (pTty)
935	{
936	# if RTLNX_VER_MIN(4,2,0)
937	const char *pszName = tty_name(pTty);
938	# else
939	char szBuf[64];
940	const char *pszName = tty_name(pTty, szBuf);
941	# endif
942	if ( pszName
943	&& pszName[0] == 't'
944	&& pszName[1] == 't'
945	&& pszName[2] == 'y'
946	&& RT_C_IS_DIGIT(pszName[3])
947	&& ( pszName[4] == '\0'
948	\|\| ( RT_C_IS_DIGIT(pszName[4])
949	&& pszName[5] == '\0'
950	&& (pszName[3] - '0') * 10 + (pszName[4] - '0') <= 63)) )
951	fRet = VMMDEV_REQUESTOR_CON_YES;
952	tty_kref_put(pTty);
953	}
954	#endif
955
956	return fRet;
957	}
958
959
960	/**
961	* Device open. Called on open /dev/vboxdrv
962	*
963	* @param pInode Pointer to inode info structure.
964	* @param pFilp Associated file pointer.
965	*/
966	static int vgdrvLinuxOpen(struct inode pInode, struct file pFilp)
967	{
968	int rc;
969	PVBOXGUESTSESSION pSession;
970	uint32_t fRequestor;
971	Log((DEVICE_NAME ": pFilp=%p pid=%d/%d %s\n", pFilp, RTProcSelf(), current->pid, current->comm));
972
973	/*
974	* Figure out the requestor flags.
975	* ASSUMES that the gid of /dev/vboxuser is what we should consider the special vbox group.
976	*/
977	fRequestor = VMMDEV_REQUESTOR_USERMODE \| VMMDEV_REQUESTOR_TRUST_NOT_GIVEN;
978	if (vgdrvLinuxGetUid() == 0)
979	fRequestor \|= VMMDEV_REQUESTOR_USR_ROOT;
980	else
981	fRequestor \|= VMMDEV_REQUESTOR_USR_USER;
982	if (MINOR(pInode->i_rdev) == g_MiscDeviceUser.minor)
983	{
984	fRequestor \|= VMMDEV_REQUESTOR_USER_DEVICE;
985	if (!vgdrvLinuxIsGroupZero(pInode->i_gid) && vgdrvLinuxIsInGroupEff(pInode->i_gid))
986	fRequestor \|= VMMDEV_REQUESTOR_GRP_VBOX;
987	}
988	fRequestor \|= vgdrvLinuxRequestorOnConsole();
989
990	/*
991	* Call common code to create the user session. Associate it with
992	* the file so we can access it in the other methods.
993	*/
994	rc = VGDrvCommonCreateUserSession(&g_DevExt, fRequestor, &pSession);
995	if (RT_SUCCESS(rc))
996	pFilp->private_data = pSession;
997
998	Log(("vgdrvLinuxOpen: g_DevExt=%p pSession=%p rc=%d/%d (pid=%d/%d %s)\n",
999	&g_DevExt, pSession, rc, vgdrvLinuxConvertToNegErrno(rc), RTProcSelf(), current->pid, current->comm));
1000	return vgdrvLinuxConvertToNegErrno(rc);
1001	}
1002
1003
1004	/**
1005	* Close device.
1006	*
1007	* @param pInode Pointer to inode info structure.
1008	* @param pFilp Associated file pointer.
1009	*/
1010	static int vgdrvLinuxRelease(struct inode pInode, struct file pFilp)
1011	{
1012	Log(("vgdrvLinuxRelease: pFilp=%p pSession=%p pid=%d/%d %s\n",
1013	pFilp, pFilp->private_data, RTProcSelf(), current->pid, current->comm));
1014
1015	#if RTLNX_VER_MAX(2,6,28)
1016	/* This housekeeping was needed in older kernel versions to ensure that
1017	* the file pointer didn't get left on the polling queue. */
1018	vgdrvLinuxFAsync(-1, pFilp, 0);
1019	#endif
1020	VGDrvCommonCloseSession(&g_DevExt, (PVBOXGUESTSESSION)pFilp->private_data);
1021	pFilp->private_data = NULL;
1022	return 0;
1023	}
1024
1025
1026	/**
1027	* Device I/O Control entry point.
1028	*
1029	* @param pFilp Associated file pointer.
1030	* @param uCmd The function specified to ioctl().
1031	* @param ulArg The argument specified to ioctl().
1032	*/
1033	#if defined(HAVE_UNLOCKED_IOCTL) \|\| defined(DOXYGEN_RUNNING)
1034	static long vgdrvLinuxIOCtl(struct file *pFilp, unsigned int uCmd, unsigned long ulArg)
1035	#else
1036	static int vgdrvLinuxIOCtl(struct inode pInode, struct file pFilp, unsigned int uCmd, unsigned long ulArg)
1037	#endif
1038	{
1039	PVBOXGUESTSESSION pSession = (PVBOXGUESTSESSION)pFilp->private_data;
1040	int rc;
1041	#ifndef HAVE_UNLOCKED_IOCTL
1042	unlock_kernel();
1043	#endif
1044
1045	#if 0 /* no fast I/O controls defined atm. */
1046	if (RT_LIKELY( ( uCmd == SUP_IOCTL_FAST_DO_RAW_RUN
1047	\|\| uCmd == SUP_IOCTL_FAST_DO_HM_RUN
1048	\|\| uCmd == SUP_IOCTL_FAST_DO_NOP)
1049	&& pSession->fUnrestricted == true))
1050	rc = VGDrvCommonIoCtlFast(uCmd, ulArg, &g_DevExt, pSession);
1051	else
1052	#endif
1053	rc = vgdrvLinuxIOCtlSlow(pFilp, uCmd, ulArg, pSession);
1054
1055	#ifndef HAVE_UNLOCKED_IOCTL
1056	lock_kernel();
1057	#endif
1058	return rc;
1059	}
1060
1061
1062	/**
1063	* Device I/O Control entry point, slow variant.
1064	*
1065	* @param pFilp Associated file pointer.
1066	* @param uCmd The function specified to ioctl().
1067	* @param ulArg The argument specified to ioctl().
1068	* @param pSession The session instance.
1069	*/
1070	static int vgdrvLinuxIOCtlSlow(struct file *pFilp, unsigned int uCmd, unsigned long ulArg, PVBOXGUESTSESSION pSession)
1071	{
1072	int rc;
1073	VBGLREQHDR Hdr;
1074	PVBGLREQHDR pHdr;
1075	uint32_t cbBuf;
1076
1077	Log6(("vgdrvLinuxIOCtlSlow: pFilp=%p uCmd=%#x ulArg=%p pid=%d/%d\n", pFilp, uCmd, (void *)ulArg, RTProcSelf(), current->pid));
1078
1079	/*
1080	* Read the header.
1081	*/
1082	if (RT_FAILURE(RTR0MemUserCopyFrom(&Hdr, ulArg, sizeof(Hdr))))
1083	{
1084	Log(("vgdrvLinuxIOCtlSlow: copy_from_user(,%#lx,) failed; uCmd=%#x\n", ulArg, uCmd));
1085	return -EFAULT;
1086	}
1087	if (RT_UNLIKELY(Hdr.uVersion != VBGLREQHDR_VERSION))
1088	{
1089	Log(("vgdrvLinuxIOCtlSlow: bad header version %#x; uCmd=%#x\n", Hdr.uVersion, uCmd));
1090	return -EINVAL;
1091	}
1092
1093	/*
1094	* Buffer the request.
1095	* Note! The header is revalidated by the common code.
1096	*/
1097	cbBuf = RT_MAX(Hdr.cbIn, Hdr.cbOut);
1098	if (RT_UNLIKELY(cbBuf > _1M*16))
1099	{
1100	Log(("vgdrvLinuxIOCtlSlow: too big cbBuf=%#x; uCmd=%#x\n", cbBuf, uCmd));
1101	return -E2BIG;
1102	}
1103	if (RT_UNLIKELY( Hdr.cbIn < sizeof(Hdr)
1104	\|\| (cbBuf != _IOC_SIZE(uCmd) && _IOC_SIZE(uCmd) != 0)))
1105	{
1106	Log(("vgdrvLinuxIOCtlSlow: bad ioctl cbBuf=%#x _IOC_SIZE=%#x; uCmd=%#x\n", cbBuf, _IOC_SIZE(uCmd), uCmd));
1107	return -EINVAL;
1108	}
1109	pHdr = RTMemAlloc(cbBuf);
1110	if (RT_UNLIKELY(!pHdr))
1111	{
1112	LogRel(("vgdrvLinuxIOCtlSlow: failed to allocate buffer of %d bytes for uCmd=%#x\n", cbBuf, uCmd));
1113	return -ENOMEM;
1114	}
1115	if (RT_FAILURE(RTR0MemUserCopyFrom(pHdr, ulArg, Hdr.cbIn)))
1116	{
1117	Log(("vgdrvLinuxIOCtlSlow: copy_from_user(,%#lx, %#x) failed; uCmd=%#x\n", ulArg, Hdr.cbIn, uCmd));
1118	RTMemFree(pHdr);
1119	return -EFAULT;
1120	}
1121	if (Hdr.cbIn < cbBuf)
1122	RT_BZERO((uint8_t *)pHdr + Hdr.cbIn, cbBuf - Hdr.cbIn);
1123
1124	/*
1125	* Process the IOCtl.
1126	*/
1127	rc = VGDrvCommonIoCtl(uCmd, &g_DevExt, pSession, pHdr, cbBuf);
1128
1129	/*
1130	* Copy ioctl data and output buffer back to user space.
1131	*/
1132	if (RT_SUCCESS(rc))
1133	{
1134	uint32_t cbOut = pHdr->cbOut;
1135	if (RT_UNLIKELY(cbOut > cbBuf))
1136	{
1137	LogRel(("vgdrvLinuxIOCtlSlow: too much output! %#x > %#x; uCmd=%#x!\n", cbOut, cbBuf, uCmd));
1138	cbOut = cbBuf;
1139	}
1140	if (RT_FAILURE(RTR0MemUserCopyTo(ulArg, pHdr, cbOut)))
1141	{
1142	/* this is really bad! */
1143	LogRel(("vgdrvLinuxIOCtlSlow: copy_to_user(%#lx,,%#x); uCmd=%#x!\n", ulArg, cbOut, uCmd));
1144	rc = -EFAULT;
1145	}
1146	}
1147	else
1148	{
1149	Log(("vgdrvLinuxIOCtlSlow: pFilp=%p uCmd=%#x ulArg=%p failed, rc=%d\n", pFilp, uCmd, (void *)ulArg, rc));
1150	rc = -EINVAL;
1151	}
1152	RTMemFree(pHdr);
1153
1154	Log6(("vgdrvLinuxIOCtlSlow: returns %d (pid=%d/%d)\n", rc, RTProcSelf(), current->pid));
1155	return rc;
1156	}
1157
1158
1159	/**
1160	* @note This code is duplicated on other platforms with variations, so please
1161	* keep them all up to date when making changes!
1162	*/
1163	int VBOXCALL VBoxGuestIDC(void *pvSession, uintptr_t uReq, PVBGLREQHDR pReqHdr, size_t cbReq)
1164	{
1165	/*
1166	* Simple request validation (common code does the rest).
1167	*/
1168	int rc;
1169	if ( RT_VALID_PTR(pReqHdr)
1170	&& cbReq >= sizeof(*pReqHdr))
1171	{
1172	/*
1173	* All requests except the connect one requires a valid session.
1174	*/
1175	PVBOXGUESTSESSION pSession = (PVBOXGUESTSESSION)pvSession;
1176	if (pSession)
1177	{
1178	if ( RT_VALID_PTR(pSession)
1179	&& pSession->pDevExt == &g_DevExt)
1180	rc = VGDrvCommonIoCtl(uReq, &g_DevExt, pSession, pReqHdr, cbReq);
1181	else
1182	rc = VERR_INVALID_HANDLE;
1183	}
1184	else if (uReq == VBGL_IOCTL_IDC_CONNECT)
1185	{
1186	rc = VGDrvCommonCreateKernelSession(&g_DevExt, &pSession);
1187	if (RT_SUCCESS(rc))
1188	{
1189	rc = VGDrvCommonIoCtl(uReq, &g_DevExt, pSession, pReqHdr, cbReq);
1190	if (RT_FAILURE(rc))
1191	VGDrvCommonCloseSession(&g_DevExt, pSession);
1192	}
1193	}
1194	else
1195	rc = VERR_INVALID_HANDLE;
1196	}
1197	else
1198	rc = VERR_INVALID_POINTER;
1199	return rc;
1200	}
1201	EXPORT_SYMBOL(VBoxGuestIDC);
1202
1203
1204	/**
1205	* Asynchronous notification activation method.
1206	*
1207	* @returns 0 on success, negative errno on failure.
1208	*
1209	* @param fd The file descriptor.
1210	* @param pFile The file structure.
1211	* @param fOn On/off indicator.
1212	*/
1213	static int vgdrvLinuxFAsync(int fd, struct file *pFile, int fOn)
1214	{
1215	return fasync_helper(fd, pFile, fOn, &g_pFAsyncQueue);
1216	}
1217
1218
1219	/**
1220	* Poll function.
1221	*
1222	* This returns ready to read if the mouse pointer mode or the pointer position
1223	* has changed since last call to read.
1224	*
1225	* @returns 0 if no changes, POLLIN \| POLLRDNORM if there are unseen changes.
1226	*
1227	* @param pFile The file structure.
1228	* @param pPt The poll table.
1229	*
1230	* @remarks This is probably not really used, X11 is said to use the fasync
1231	* interface instead.
1232	*/
1233	static unsigned int vgdrvLinuxPoll(struct file pFile, poll_table pPt)
1234	{
1235	PVBOXGUESTSESSION pSession = (PVBOXGUESTSESSION)pFile->private_data;
1236	uint32_t u32CurSeq = ASMAtomicUoReadU32(&g_DevExt.u32MousePosChangedSeq);
1237	unsigned int fMask = pSession->u32MousePosChangedSeq != u32CurSeq
1238	? POLLIN \| POLLRDNORM
1239	: 0;
1240	poll_wait(pFile, &g_PollEventQueue, pPt);
1241	return fMask;
1242	}
1243
1244
1245	/**
1246	* Read to go with our poll/fasync response.
1247	*
1248	* @returns 1 or -EINVAL.
1249	*
1250	* @param pFile The file structure.
1251	* @param pbBuf The buffer to read into.
1252	* @param cbRead The max number of bytes to read.
1253	* @param poff The current file position.
1254	*
1255	* @remarks This is probably not really used as X11 lets the driver do its own
1256	* event reading. The poll condition is therefore also cleared when we
1257	* see VMMDevReq_GetMouseStatus in vgdrvIoCtl_VMMRequest.
1258	*/
1259	static ssize_t vgdrvLinuxRead(struct file pFile, char pbBuf, size_t cbRead, loff_t *poff)
1260	{
1261	PVBOXGUESTSESSION pSession = (PVBOXGUESTSESSION)pFile->private_data;
1262	uint32_t u32CurSeq = ASMAtomicUoReadU32(&g_DevExt.u32MousePosChangedSeq);
1263
1264	if (*poff != 0)
1265	return -EINVAL;
1266
1267	/*
1268	* Fake a single byte read if we're not up to date with the current mouse position.
1269	*/
1270	if ( pSession->u32MousePosChangedSeq != u32CurSeq
1271	&& cbRead > 0)
1272	{
1273	pSession->u32MousePosChangedSeq = u32CurSeq;
1274	pbBuf[0] = 0;
1275	return 1;
1276	}
1277	return 0;
1278	}
1279
1280
1281	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
1282	/**
1283	* Get host mouse state.
1284	*
1285	* @returns IPRT status code.
1286	* @param pfMouseFeatures Where to store host mouse capabilities.
1287	* @param pX Where to store X axis coordinate.
1288	* @param pY Where to store Y axis coordinate.
1289	* @param pDz Where to store vertical wheel movement offset (only set if in case of VMMDevReq_GetMouseStatusEx request).
1290	* @param pDw Where to store horizontal wheel movement offset (only set if in case of VMMDevReq_GetMouseStatusEx request).
1291	* @param pfButtons Where to store mouse buttons state (only set if in case of VMMDevReq_GetMouseStatusEx request).
1292	*/
1293	static int vgdrvLinuxGetHostMouseState(uint32_t pfMouseFeatures, int32_t pX, int32_t pY, int32_t pDz, int32_t pDw, uint32_t pfButtons)
1294	{
1295	int rc = VERR_INVALID_PARAMETER;
1296
1297	Assert(pfMouseFeatures);
1298	Assert(pX);
1299	Assert(pY);
1300	Assert(pDz);
1301	Assert(pDw);
1302	Assert(pfButtons);
1303
1304	/* Initialize legacy request data. */
1305	g_pMouseStatusReqEx->Core.mouseFeatures = 0;
1306	g_pMouseStatusReqEx->Core.pointerXPos = 0;
1307	g_pMouseStatusReqEx->Core.pointerYPos = 0;
1308
1309	/* Initialize extended request data if VMMDevReq_GetMouseStatusEx is used. */
1310	if (vgdrvLinuxUsesMouseStatusEx())
1311	{
1312	g_pMouseStatusReqEx->dz = 0;
1313	g_pMouseStatusReqEx->dw = 0;
1314	g_pMouseStatusReqEx->fButtons = 0;
1315	}
1316
1317	/* Get host mouse state - either lagacy or extended version. */
1318	rc = VbglR0GRPerform(&g_pMouseStatusReqEx->Core.header);
1319	if (RT_SUCCESS(rc))
1320	{
1321	*pfMouseFeatures = g_pMouseStatusReqEx->Core.mouseFeatures;
1322	*pX = g_pMouseStatusReqEx->Core.pointerXPos;
1323	*pY = g_pMouseStatusReqEx->Core.pointerYPos;
1324
1325	/* Get extended mouse state data in case of VMMDevReq_GetMouseStatusEx. */
1326	if (vgdrvLinuxUsesMouseStatusEx())
1327	{
1328	*pDz = g_pMouseStatusReqEx->dz;
1329	*pDw = g_pMouseStatusReqEx->dw;
1330	*pfButtons = g_pMouseStatusReqEx->fButtons;
1331	}
1332	}
1333
1334	return rc;
1335	}
1336	#endif /* VBOXGUEST_WITH_INPUT_DRIVER */
1337
1338
1339	void VGDrvNativeISRMousePollEvent(PVBOXGUESTDEVEXT pDevExt)
1340	{
1341	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
1342	int rc;
1343	uint32_t fMouseFeatures = 0;
1344	int32_t x = 0;
1345	int32_t y = 0;
1346	int32_t dz = 0;
1347	int32_t dw = 0;
1348	uint32_t fButtons = 0;
1349	#endif
1350	NOREF(pDevExt);
1351
1352	/*
1353	* Wake up everyone that's in a poll() and post anyone that has
1354	* subscribed to async notifications.
1355	*/
1356	Log3(("VGDrvNativeISRMousePollEvent: wake_up_all\n"));
1357	wake_up_all(&g_PollEventQueue);
1358	Log3(("VGDrvNativeISRMousePollEvent: kill_fasync\n"));
1359	kill_fasync(&g_pFAsyncQueue, SIGIO, POLL_IN);
1360	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
1361	rc = vgdrvLinuxGetHostMouseState(&fMouseFeatures, &x, &y, &dz, &dw, &fButtons);
1362	if (RT_SUCCESS(rc))
1363	{
1364	input_report_abs(g_pInputDevice, ABS_X, x);
1365	input_report_abs(g_pInputDevice, ABS_Y, y);
1366
1367	if ( vgdrvLinuxUsesMouseStatusEx()
1368	&& ( fMouseFeatures
1369	& (VMMDEV_MOUSE_HOST_SUPPORTS_FULL_STATE_PROTOCOL \| VMMDEV_MOUSE_GUEST_USES_FULL_STATE_PROTOCOL))
1370	== ( VMMDEV_MOUSE_HOST_SUPPORTS_FULL_STATE_PROTOCOL \| VMMDEV_MOUSE_GUEST_USES_FULL_STATE_PROTOCOL ) )
1371	{
1372	/* Vertical and horizontal scroll values come as-is from GUI.
1373	* Invert values here as it is done in PS/2 mouse driver, so
1374	* scrolling direction will be exectly the same. */
1375	input_report_rel(g_pInputDevice, REL_WHEEL, -dz);
1376	input_report_rel(g_pInputDevice, REL_HWHEEL, -dw);
1377
1378	input_report_key(g_pInputDevice, BTN_LEFT, RT_BOOL(fButtons & VMMDEV_MOUSE_BUTTON_LEFT));
1379	input_report_key(g_pInputDevice, BTN_RIGHT, RT_BOOL(fButtons & VMMDEV_MOUSE_BUTTON_RIGHT));
1380	input_report_key(g_pInputDevice, BTN_MIDDLE, RT_BOOL(fButtons & VMMDEV_MOUSE_BUTTON_MIDDLE));
1381	input_report_key(g_pInputDevice, BTN_SIDE, RT_BOOL(fButtons & VMMDEV_MOUSE_BUTTON_X1));
1382	input_report_key(g_pInputDevice, BTN_EXTRA, RT_BOOL(fButtons & VMMDEV_MOUSE_BUTTON_X2));
1383	}
1384
1385	# ifdef EV_SYN
1386	input_sync(g_pInputDevice);
1387	# endif
1388	}
1389	#endif
1390	Log3(("VGDrvNativeISRMousePollEvent: done\n"));
1391	}
1392
1393
1394	bool VGDrvNativeProcessOption(PVBOXGUESTDEVEXT pDevExt, const char pszName, const char pszValue)
1395	{
1396	RT_NOREF(pDevExt); RT_NOREF(pszName); RT_NOREF(pszValue);
1397	return false;
1398	}
1399
1400
1401	#if RTLNX_VER_MIN(2,6,0)
1402
1403	/** log and dbg_log parameter setter. */
1404	static int vgdrvLinuxParamLogGrpSet(const char pszValue, CONST_4_15 struct kernel_param pParam)
1405	{
1406	if (g_fLoggerCreated)
1407	{
1408	PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
1409	if (pLogger)
1410	RTLogGroupSettings(pLogger, pszValue);
1411	}
1412	else if (pParam->name[0] != 'd')
1413	strlcpy(&g_szLogGrp[0], pszValue, sizeof(g_szLogGrp));
1414
1415	return 0;
1416	}
1417
1418	/** log and dbg_log parameter getter. */
1419	static int vgdrvLinuxParamLogGrpGet(char pszBuf, CONST_4_15 struct kernel_param pParam)
1420	{
1421	PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
1422	*pszBuf = '\0';
1423	if (pLogger)
1424	RTLogQueryGroupSettings(pLogger, pszBuf, _4K);
1425	return strlen(pszBuf);
1426	}
1427
1428
1429	/** log and dbg_log_flags parameter setter. */
1430	static int vgdrvLinuxParamLogFlagsSet(const char pszValue, CONST_4_15 struct kernel_param pParam)
1431	{
1432	if (g_fLoggerCreated)
1433	{
1434	PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
1435	if (pLogger)
1436	RTLogFlags(pLogger, pszValue);
1437	}
1438	else if (pParam->name[0] != 'd')
1439	strlcpy(&g_szLogFlags[0], pszValue, sizeof(g_szLogFlags));
1440	return 0;
1441	}
1442
1443	/** log and dbg_log_flags parameter getter. */
1444	static int vgdrvLinuxParamLogFlagsGet(char pszBuf, CONST_4_15 struct kernel_param pParam)
1445	{
1446	PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
1447	*pszBuf = '\0';
1448	if (pLogger)
1449	RTLogQueryFlags(pLogger, pszBuf, _4K);
1450	return strlen(pszBuf);
1451	}
1452
1453
1454	/** log and dbg_log_dest parameter setter. */
1455	static int vgdrvLinuxParamLogDstSet(const char pszValue, CONST_4_15 struct kernel_param pParam)
1456	{
1457	if (g_fLoggerCreated)
1458	{
1459	PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
1460	if (pLogger)
1461	RTLogDestinations(pLogger, pszValue);
1462	}
1463	else if (pParam->name[0] != 'd')
1464	strlcpy(&g_szLogDst[0], pszValue, sizeof(g_szLogDst));
1465	return 0;
1466	}
1467
1468	/** log and dbg_log_dest parameter getter. */
1469	static int vgdrvLinuxParamLogDstGet(char pszBuf, CONST_4_15 struct kernel_param pParam)
1470	{
1471	PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
1472	*pszBuf = '\0';
1473	if (pLogger)
1474	RTLogQueryDestinations(pLogger, pszBuf, _4K);
1475	return strlen(pszBuf);
1476	}
1477
1478
1479	/** r3_log_to_host parameter setter. */
1480	static int vgdrvLinuxParamR3LogToHostSet(const char pszValue, CONST_4_15 struct kernel_param pParam)
1481	{
1482	g_DevExt.fLoggingEnabled = VBDrvCommonIsOptionValueTrue(pszValue);
1483	return 0;
1484	}
1485
1486	/** r3_log_to_host parameter getter. */
1487	static int vgdrvLinuxParamR3LogToHostGet(char pszBuf, CONST_4_15 struct kernel_param pParam)
1488	{
1489	strcpy(pszBuf, g_DevExt.fLoggingEnabled ? "enabled" : "disabled");
1490	return strlen(pszBuf);
1491	}
1492
1493
1494	/*
1495	* Define module parameters.
1496	*/
1497	module_param_call(log, vgdrvLinuxParamLogGrpSet, vgdrvLinuxParamLogGrpGet, NULL, 0664);
1498	module_param_call(log_flags, vgdrvLinuxParamLogFlagsSet, vgdrvLinuxParamLogFlagsGet, NULL, 0664);
1499	module_param_call(log_dest, vgdrvLinuxParamLogDstSet, vgdrvLinuxParamLogDstGet, NULL, 0664);
1500	# ifdef LOG_ENABLED
1501	module_param_call(dbg_log, vgdrvLinuxParamLogGrpSet, vgdrvLinuxParamLogGrpGet, NULL, 0664);
1502	module_param_call(dbg_log_flags, vgdrvLinuxParamLogFlagsSet, vgdrvLinuxParamLogFlagsGet, NULL, 0664);
1503	module_param_call(dbg_log_dest, vgdrvLinuxParamLogDstSet, vgdrvLinuxParamLogDstGet, NULL, 0664);
1504	# endif
1505	module_param_call(r3_log_to_host, vgdrvLinuxParamR3LogToHostSet, vgdrvLinuxParamR3LogToHostGet, NULL, 0664);
1506
1507	#endif /* 2.6.0 and later */
1508
1509
1510	module_init(vgdrvLinuxModInit);
1511	module_exit(vgdrvLinuxModExit);
1512
1513	MODULE_AUTHOR(VBOX_VENDOR);
1514	MODULE_DESCRIPTION(VBOX_PRODUCT " Guest Additions for Linux Module");
1515	MODULE_LICENSE("GPL");
1516	#ifdef MODULE_VERSION
1517	MODULE_VERSION(VBOX_VERSION_STRING " r" RT_XSTR(VBOX_SVN_REV));
1518	#endif
1519

Note: See TracBrowser for help on using the repository browser.

source: vbox/trunk/src/VBox/Additions/common/VBoxGuest/VBoxGuest-linux.c@ 100360

Download in other formats: