VBoxGuest-linux.c@ 93516

Last change on this file since 93516 was 93115, checked in by vboxsync, 3 years ago
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1	/* $Id: VBoxGuest-linux.c 93115 2022-01-01 11:31:46Z 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) 2006-2022 Oracle Corporation
11	*
12	* This file is part of VirtualBox Open Source Edition (OSE), as
13	* available from http://www.virtualbox.org. This file is free software;
14	* you can redistribute it and/or modify it under the terms of the GNU
15	* General Public License (GPL) as published by the Free Software
16	* Foundation, in version 2 as it comes in the "COPYING" file of the
17	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
18	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
19	*
20	* The contents of this file may alternatively be used under the terms
21	* of the Common Development and Distribution License Version 1.0
22	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
23	* VirtualBox OSE distribution, in which case the provisions of the
24	* CDDL are applicable instead of those of the GPL.
25	*
26	* You may elect to license modified versions of this file under the
27	* terms and conditions of either the GPL or the CDDL or both.
28	*/
29
30
31	/*********************************************************************************************************************************
32	* Header Files *
33	*********************************************************************************************************************************/
34	#define LOG_GROUP LOG_GROUP_SUP_DRV
35
36	#include "the-linux-kernel.h"
37
38	#if RTLNX_VER_MIN(2,6,15)
39	# define VBOXGUEST_WITH_INPUT_DRIVER
40	#endif
41
42	#if RTLNX_VER_MIN(4,15,0)
43	# define CONST_4_15 const
44	#else
45	# define CONST_4_15
46	#endif
47
48	#include "VBoxGuestInternal.h"
49	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
50	# include <linux/input.h>
51	#endif
52	#include <linux/miscdevice.h>
53	#include <linux/poll.h>
54	#if RTLNX_VER_MIN(2,6,28)
55	# include <linux/tty.h>
56	#endif
57	#include <VBox/version.h>
58	#include "revision-generated.h"
59
60	#include <iprt/assert.h>
61	#include <iprt/asm.h>
62	#include <iprt/ctype.h>
63	#include <iprt/initterm.h>
64	#include <iprt/mem.h>
65	#include <iprt/mp.h>
66	#include <iprt/process.h>
67	#include <iprt/spinlock.h>
68	#include <iprt/semaphore.h>
69	#include <iprt/string.h>
70	#include <VBox/err.h>
71	#include <VBox/log.h>
72
73
74	/*********************************************************************************************************************************
75	* Defined Constants And Macros *
76	*********************************************************************************************************************************/
77	/** The device name. */
78	#define DEVICE_NAME "vboxguest"
79	/** The device name for the device node open to everyone. */
80	#define DEVICE_NAME_USER "vboxuser"
81	/** The name of the PCI driver */
82	#define DRIVER_NAME DEVICE_NAME
83
84
85	/* 2.4.x compatibility macros that may or may not be defined. */
86	#ifndef IRQ_RETVAL
87	# define irqreturn_t void
88	# define IRQ_RETVAL(n)
89	#endif
90
91	/* uidgid.h was introduced in 3.5.0. */
92	#if RTLNX_VER_MAX(3,5,0)
93	# define kgid_t gid_t
94	# define kuid_t uid_t
95	#endif
96
97
98	/*********************************************************************************************************************************
99	* Internal Functions *
100	*********************************************************************************************************************************/
101	static void vgdrvLinuxTermPci(struct pci_dev *pPciDev);
102	static int vgdrvLinuxProbePci(struct pci_dev pPciDev, const struct pci_device_id id);
103	static int __init vgdrvLinuxModInit(void);
104	static void __exit vgdrvLinuxModExit(void);
105	static int vgdrvLinuxOpen(struct inode pInode, struct file pFilp);
106	static int vgdrvLinuxRelease(struct inode pInode, struct file pFilp);
107	#ifdef HAVE_UNLOCKED_IOCTL
108	static long vgdrvLinuxIOCtl(struct file *pFilp, unsigned int uCmd, unsigned long ulArg);
109	#else
110	static int vgdrvLinuxIOCtl(struct inode pInode, struct file pFilp, unsigned int uCmd, unsigned long ulArg);
111	#endif
112	static int vgdrvLinuxIOCtlSlow(struct file *pFilp, unsigned int uCmd, unsigned long ulArg, PVBOXGUESTSESSION pSession);
113	static int vgdrvLinuxFAsync(int fd, struct file *pFile, int fOn);
114	static unsigned int vgdrvLinuxPoll(struct file pFile, poll_table pPt);
115	static ssize_t vgdrvLinuxRead(struct file pFile, char pbBuf, size_t cbRead, loff_t *poff);
116
117
118	/*********************************************************************************************************************************
119	* Global Variables *
120	*********************************************************************************************************************************/
121	/**
122	* Device extention & session data association structure.
123	*/
124	static VBOXGUESTDEVEXT g_DevExt;
125	/** The PCI device. */
126	static struct pci_dev *g_pPciDev = NULL;
127	/** The base of the I/O port range. */
128	static RTIOPORT g_IOPortBase;
129	/** The base of the MMIO range. */
130	static RTHCPHYS g_MMIOPhysAddr = NIL_RTHCPHYS;
131	/** The size of the MMIO range as seen by PCI. */
132	static uint32_t g_cbMMIO;
133	/** The pointer to the mapping of the MMIO range. */
134	static void *g_pvMMIOBase;
135	/** Wait queue used by polling. */
136	static wait_queue_head_t g_PollEventQueue;
137	/** Asynchronous notification stuff. */
138	static struct fasync_struct *g_pFAsyncQueue;
139	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
140	/** Pre-allocated mouse status VMMDev request for use in the IRQ
141	* handler. */
142	static VMMDevReqMouseStatus *g_pMouseStatusReq;
143	#endif
144	#if RTLNX_VER_MIN(2,6,0)
145	/** Whether we've create the logger or not. */
146	static volatile bool g_fLoggerCreated;
147	/** Release logger group settings. */
148	static char g_szLogGrp[128];
149	/** Release logger flags settings. */
150	static char g_szLogFlags[128];
151	/** Release logger destination settings. */
152	static char g_szLogDst[128];
153	# if 0
154	/** Debug logger group settings. */
155	static char g_szDbgLogGrp[128];
156	/** Debug logger flags settings. */
157	static char g_szDbgLogFlags[128];
158	/** Debug logger destination settings. */
159	static char g_szDbgLogDst[128];
160	# endif
161	#endif
162
163	/** The input device handle */
164	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
165	static struct input_dev *g_pInputDevice = NULL;
166	#endif
167
168	/** The file_operations structure. */
169	static struct file_operations g_FileOps =
170	{
171	owner: THIS_MODULE,
172	open: vgdrvLinuxOpen,
173	release: vgdrvLinuxRelease,
174	#ifdef HAVE_UNLOCKED_IOCTL
175	unlocked_ioctl: vgdrvLinuxIOCtl,
176	#else
177	ioctl: vgdrvLinuxIOCtl,
178	#endif
179	fasync: vgdrvLinuxFAsync,
180	read: vgdrvLinuxRead,
181	poll: vgdrvLinuxPoll,
182	llseek: no_llseek,
183	};
184
185	/** The miscdevice structure. */
186	static struct miscdevice g_MiscDevice =
187	{
188	minor: MISC_DYNAMIC_MINOR,
189	name: DEVICE_NAME,
190	fops: &g_FileOps,
191	};
192
193	/** The file_operations structure for the user device.
194	* @remarks For the time being we'll be using the same implementation as
195	* /dev/vboxguest here. */
196	static struct file_operations g_FileOpsUser =
197	{
198	owner: THIS_MODULE,
199	open: vgdrvLinuxOpen,
200	release: vgdrvLinuxRelease,
201	#ifdef HAVE_UNLOCKED_IOCTL
202	unlocked_ioctl: vgdrvLinuxIOCtl,
203	#else
204	ioctl: vgdrvLinuxIOCtl,
205	#endif
206	};
207
208	/** The miscdevice structure for the user device. */
209	static struct miscdevice g_MiscDeviceUser =
210	{
211	minor: MISC_DYNAMIC_MINOR,
212	name: DEVICE_NAME_USER,
213	fops: &g_FileOpsUser,
214	};
215
216
217	/** PCI hotplug structure. */
218	static const struct pci_device_id g_VBoxGuestPciId[] =
219	{
220	{
221	vendor: VMMDEV_VENDORID,
222	device: VMMDEV_DEVICEID
223	},
224	{
225	/* empty entry */
226	}
227	};
228
229	MODULE_DEVICE_TABLE(pci, g_VBoxGuestPciId);
230
231	/** Structure for registering the PCI driver. */
232	static struct pci_driver g_PciDriver =
233	{
234	name: DRIVER_NAME,
235	id_table: g_VBoxGuestPciId,
236	probe: vgdrvLinuxProbePci,
237	remove: vgdrvLinuxTermPci
238	};
239
240	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
241	/** Kernel IDC session to ourselves for use with the mouse events. */
242	static PVBOXGUESTSESSION g_pKernelSession = NULL;
243	#endif
244
245
246
247	/**
248	* Converts a VBox status code to a linux error code.
249	*
250	* @returns corresponding negative linux error code.
251	* @param rc supdrv error code (SUPDRV_ERR_* defines).
252	*/
253	static int vgdrvLinuxConvertToNegErrno(int rc)
254	{
255	if ( rc > -1000
256	&& rc < 1000)
257	return -RTErrConvertToErrno(rc);
258	switch (rc)
259	{
260	case VERR_HGCM_SERVICE_NOT_FOUND: return -ESRCH;
261	case VINF_HGCM_CLIENT_REJECTED: return 0;
262	case VERR_HGCM_INVALID_CMD_ADDRESS: return -EFAULT;
263	case VINF_HGCM_ASYNC_EXECUTE: return 0;
264	case VERR_HGCM_INTERNAL: return -EPROTO;
265	case VERR_HGCM_INVALID_CLIENT_ID: return -EINVAL;
266	case VINF_HGCM_SAVE_STATE: return 0;
267	/* No reason to return this to a guest */
268	// case VERR_HGCM_SERVICE_EXISTS: return -EEXIST;
269	default:
270	AssertMsgFailed(("Unhandled error code %Rrc\n", rc));
271	return -EPROTO;
272	}
273	}
274
275
276	/**
277	* Does the PCI detection and init of the device.
278	*
279	* @returns 0 on success, negated errno on failure.
280	*/
281	static int vgdrvLinuxProbePci(struct pci_dev pPciDev, const struct pci_device_id id)
282	{
283	int rc;
284
285	NOREF(id);
286	AssertReturn(!g_pPciDev, -EINVAL);
287	rc = pci_enable_device(pPciDev);
288	if (rc >= 0)
289	{
290	/* I/O Ports are mandatory, the MMIO bit is not. */
291	g_IOPortBase = pci_resource_start(pPciDev, 0);
292	if (g_IOPortBase != 0)
293	{
294	/*
295	* Map the register address space.
296	*/
297	g_MMIOPhysAddr = pci_resource_start(pPciDev, 1);
298	g_cbMMIO = pci_resource_len(pPciDev, 1);
299	if (request_mem_region(g_MMIOPhysAddr, g_cbMMIO, DEVICE_NAME) != NULL)
300	{
301	g_pvMMIOBase = ioremap(g_MMIOPhysAddr, g_cbMMIO);
302	if (g_pvMMIOBase)
303	{
304	/** @todo why aren't we requesting ownership of the I/O ports as well? */
305	g_pPciDev = pPciDev;
306	return 0;
307	}
308
309	/* failure cleanup path */
310	LogRel((DEVICE_NAME ": ioremap failed; MMIO Addr=%RHp cb=%#x\n", g_MMIOPhysAddr, g_cbMMIO));
311	rc = -ENOMEM;
312	release_mem_region(g_MMIOPhysAddr, g_cbMMIO);
313	}
314	else
315	{
316	LogRel((DEVICE_NAME ": failed to obtain adapter memory\n"));
317	rc = -EBUSY;
318	}
319	g_MMIOPhysAddr = NIL_RTHCPHYS;
320	g_cbMMIO = 0;
321	g_IOPortBase = 0;
322	}
323	else
324	{
325	LogRel((DEVICE_NAME ": did not find expected hardware resources\n"));
326	rc = -ENXIO;
327	}
328	pci_disable_device(pPciDev);
329	}
330	else
331	LogRel((DEVICE_NAME ": could not enable device: %d\n", rc));
332	return rc;
333	}
334
335
336	/**
337	* Clean up the usage of the PCI device.
338	*/
339	static void vgdrvLinuxTermPci(struct pci_dev *pPciDev)
340	{
341	g_pPciDev = NULL;
342	if (pPciDev)
343	{
344	iounmap(g_pvMMIOBase);
345	g_pvMMIOBase = NULL;
346
347	release_mem_region(g_MMIOPhysAddr, g_cbMMIO);
348	g_MMIOPhysAddr = NIL_RTHCPHYS;
349	g_cbMMIO = 0;
350
351	pci_disable_device(pPciDev);
352	}
353	}
354
355
356	/**
357	* Interrupt service routine.
358	*
359	* @returns In 2.4 it returns void.
360	* In 2.6 we indicate whether we've handled the IRQ or not.
361	*
362	* @param iIrq The IRQ number.
363	* @param pvDevId The device ID, a pointer to g_DevExt.
364	* @param pRegs Register set. Removed in 2.6.19.
365	*/
366	#if RTLNX_VER_MIN(2,6,19) && !defined(DOXYGEN_RUNNING)
367	static irqreturn_t vgdrvLinuxISR(int iIrq, void *pvDevId)
368	#else
369	static irqreturn_t vgdrvLinuxISR(int iIrq, void pvDevId, struct pt_regs pRegs)
370	#endif
371	{
372	bool fTaken = VGDrvCommonISR(&g_DevExt);
373	return IRQ_RETVAL(fTaken);
374	}
375
376
377	/**
378	* Registers the ISR and initializes the poll wait queue.
379	*/
380	static int __init vgdrvLinuxInitISR(void)
381	{
382	int rc;
383
384	init_waitqueue_head(&g_PollEventQueue);
385	rc = request_irq(g_pPciDev->irq,
386	vgdrvLinuxISR,
387	#if RTLNX_VER_MIN(2,6,20)
388	IRQF_SHARED,
389	#else
390	SA_SHIRQ,
391	#endif
392	DEVICE_NAME,
393	&g_DevExt);
394	if (rc)
395	{
396	LogRel((DEVICE_NAME ": could not request IRQ %d: err=%d\n", g_pPciDev->irq, rc));
397	return rc;
398	}
399	return 0;
400	}
401
402
403	/**
404	* Deregisters the ISR.
405	*/
406	static void vgdrvLinuxTermISR(void)
407	{
408	free_irq(g_pPciDev->irq, &g_DevExt);
409	}
410
411
412	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
413
414	/**
415	* Reports the mouse integration status to the host.
416	*
417	* Calls the kernel IOCtl to report mouse status to the host on behalf of
418	* our kernel session.
419	*
420	* @param fStatus The mouse status to report.
421	*/
422	static int vgdrvLinuxSetMouseStatus(uint32_t fStatus)
423	{
424	int rc;
425	VBGLIOCSETMOUSESTATUS Req;
426	VBGLREQHDR_INIT(&Req.Hdr, SET_MOUSE_STATUS);
427	Req.u.In.fStatus = fStatus;
428	rc = VGDrvCommonIoCtl(VBGL_IOCTL_SET_MOUSE_STATUS, &g_DevExt, g_pKernelSession, &Req.Hdr, sizeof(Req));
429	if (RT_SUCCESS(rc))
430	rc = Req.Hdr.rc;
431	return rc;
432	}
433
434
435	/**
436	* Called when the input device is first opened.
437	*
438	* Sets up absolute mouse reporting.
439	*/
440	static int vboxguestOpenInputDevice(struct input_dev *pDev)
441	{
442	int rc = vgdrvLinuxSetMouseStatus(VMMDEV_MOUSE_GUEST_CAN_ABSOLUTE \| VMMDEV_MOUSE_NEW_PROTOCOL);
443	if (RT_FAILURE(rc))
444	return ENODEV;
445	NOREF(pDev);
446	return 0;
447	}
448
449
450	/**
451	* Called if all open handles to the input device are closed.
452	*
453	* Disables absolute reporting.
454	*/
455	static void vboxguestCloseInputDevice(struct input_dev *pDev)
456	{
457	NOREF(pDev);
458	vgdrvLinuxSetMouseStatus(0);
459	}
460
461
462	/**
463	* Creates the kernel input device.
464	*/
465	static int __init vgdrvLinuxCreateInputDevice(void)
466	{
467	int rc = VbglR0GRAlloc((VMMDevRequestHeader *)&g_pMouseStatusReq, sizeof(g_pMouseStatusReq), VMMDevReq_GetMouseStatus);
468	if (RT_SUCCESS(rc))
469	{
470	g_pInputDevice = input_allocate_device();
471	if (g_pInputDevice)
472	{
473	g_pInputDevice->id.bustype = BUS_PCI;
474	g_pInputDevice->id.vendor = VMMDEV_VENDORID;
475	g_pInputDevice->id.product = VMMDEV_DEVICEID;
476	g_pInputDevice->id.version = VBOX_SHORT_VERSION;
477	g_pInputDevice->open = vboxguestOpenInputDevice;
478	g_pInputDevice->close = vboxguestCloseInputDevice;
479	# if RTLNX_VER_MAX(2,6,22)
480	g_pInputDevice->cdev.dev = &g_pPciDev->dev;
481	# else
482	g_pInputDevice->dev.parent = &g_pPciDev->dev;
483	# endif
484	rc = input_register_device(g_pInputDevice);
485	if (rc == 0)
486	{
487	/* Do what one of our competitors apparently does as that works. */
488	ASMBitSet(g_pInputDevice->evbit, EV_ABS);
489	ASMBitSet(g_pInputDevice->evbit, EV_KEY);
490	# ifdef EV_SYN
491	ASMBitSet(g_pInputDevice->evbit, EV_SYN);
492	# endif
493	input_set_abs_params(g_pInputDevice, ABS_X, VMMDEV_MOUSE_RANGE_MIN, VMMDEV_MOUSE_RANGE_MAX, 0, 0);
494	input_set_abs_params(g_pInputDevice, ABS_Y, VMMDEV_MOUSE_RANGE_MIN, VMMDEV_MOUSE_RANGE_MAX, 0, 0);
495	ASMBitSet(g_pInputDevice->keybit, BTN_MOUSE);
496	/** @todo this string should be in a header file somewhere. */
497	g_pInputDevice->name = "VirtualBox mouse integration";
498	return 0;
499	}
500
501	input_free_device(g_pInputDevice);
502	}
503	else
504	rc = -ENOMEM;
505	VbglR0GRFree(&g_pMouseStatusReq->header);
506	g_pMouseStatusReq = NULL;
507	}
508	else
509	rc = -ENOMEM;
510	return rc;
511	}
512
513
514	/**
515	* Terminates the kernel input device.
516	*/
517	static void vgdrvLinuxTermInputDevice(void)
518	{
519	VbglR0GRFree(&g_pMouseStatusReq->header);
520	g_pMouseStatusReq = NULL;
521
522	/* See documentation of input_register_device(): input_free_device()
523	* should not be called after a device has been registered. */
524	input_unregister_device(g_pInputDevice);
525	}
526
527	#endif /* VBOXGUEST_WITH_INPUT_DRIVER */
528
529	/**
530	* Creates the device nodes.
531	*
532	* @returns 0 on success, negated errno on failure.
533	*/
534	static int __init vgdrvLinuxInitDeviceNodes(void)
535	{
536	/*
537	* The full feature device node.
538	*/
539	int rc = misc_register(&g_MiscDevice);
540	if (!rc)
541	{
542	/*
543	* The device node intended to be accessible by all users.
544	*/
545	rc = misc_register(&g_MiscDeviceUser);
546	if (!rc)
547	return 0;
548	LogRel((DEVICE_NAME ": misc_register failed for %s (rc=%d)\n", DEVICE_NAME_USER, rc));
549	misc_deregister(&g_MiscDevice);
550	}
551	else
552	LogRel((DEVICE_NAME ": misc_register failed for %s (rc=%d)\n", DEVICE_NAME, rc));
553	return rc;
554	}
555
556
557	/**
558	* Deregisters the device nodes.
559	*/
560	static void vgdrvLinuxTermDeviceNodes(void)
561	{
562	misc_deregister(&g_MiscDevice);
563	misc_deregister(&g_MiscDeviceUser);
564	}
565
566
567	/**
568	* Initialize module.
569	*
570	* @returns appropriate status code.
571	*/
572	static int __init vgdrvLinuxModInit(void)
573	{
574	static const char * const s_apszGroups[] = VBOX_LOGGROUP_NAMES;
575	PRTLOGGER pRelLogger;
576	int rc;
577
578	/*
579	* Initialize IPRT first.
580	*/
581	rc = RTR0Init(0);
582	if (RT_FAILURE(rc))
583	{
584	printk(KERN_ERR DEVICE_NAME ": RTR0Init failed, rc=%d.\n", rc);
585	return -EINVAL;
586	}
587
588	/*
589	* Create the release log.
590	* (We do that here instead of common code because we want to log
591	* early failures using the LogRel macro.)
592	*/
593	rc = RTLogCreate(&pRelLogger, 0 /* fFlags */, "all",
594	"VBOX_RELEASE_LOG", RT_ELEMENTS(s_apszGroups), s_apszGroups,
595	RTLOGDEST_STDOUT \| RTLOGDEST_DEBUGGER \| RTLOGDEST_USER, NULL);
596	if (RT_SUCCESS(rc))
597	{
598	#if RTLNX_VER_MIN(2,6,0)
599	RTLogGroupSettings(pRelLogger, g_szLogGrp);
600	RTLogFlags(pRelLogger, g_szLogFlags);
601	RTLogDestinations(pRelLogger, g_szLogDst);
602	#endif
603	RTLogRelSetDefaultInstance(pRelLogger);
604	}
605	#if RTLNX_VER_MIN(2,6,0)
606	g_fLoggerCreated = true;
607	#endif
608
609	/*
610	* Locate and initialize the PCI device.
611	*/
612	rc = pci_register_driver(&g_PciDriver);
613	if (rc >= 0 && g_pPciDev)
614	{
615	/*
616	* Call the common device extension initializer.
617	*/
618	#if RTLNX_VER_MIN(2,6,0) && defined(RT_ARCH_X86)
619	VBOXOSTYPE enmOSType = VBOXOSTYPE_Linux26;
620	#elif RTLNX_VER_MIN(2,6,0) && defined(RT_ARCH_AMD64)
621	VBOXOSTYPE enmOSType = VBOXOSTYPE_Linux26_x64;
622	#elif RTLNX_VER_MIN(2,4,0) && defined(RT_ARCH_X86)
623	VBOXOSTYPE enmOSType = VBOXOSTYPE_Linux24;
624	#elif RTLNX_VER_MIN(2,4,0) && defined(RT_ARCH_AMD64)
625	VBOXOSTYPE enmOSType = VBOXOSTYPE_Linux24_x64;
626	#else
627	# warning "huh? which arch + version is this?"
628	VBOXOSTYPE enmOsType = VBOXOSTYPE_Linux;
629	#endif
630	rc = VGDrvCommonInitDevExt(&g_DevExt,
631	g_IOPortBase,
632	g_pvMMIOBase,
633	g_cbMMIO,
634	enmOSType,
635	VMMDEV_EVENT_MOUSE_POSITION_CHANGED);
636	if (RT_SUCCESS(rc))
637	{
638	/*
639	* Register the interrupt service routine for it now that g_DevExt can handle IRQs.
640	*/
641	rc = vgdrvLinuxInitISR();
642	if (rc >= 0) /** @todo r=bird: status check differs from that inside vgdrvLinuxInitISR. */
643	{
644	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
645	/*
646	* Create the kernel session for this driver.
647	*/
648	rc = VGDrvCommonCreateKernelSession(&g_DevExt, &g_pKernelSession);
649	if (RT_SUCCESS(rc))
650	{
651	/*
652	* Create the kernel input device.
653	*/
654	rc = vgdrvLinuxCreateInputDevice();
655	if (rc >= 0)
656	{
657	#endif
658	/*
659	* Read host configuration.
660	*/
661	VGDrvCommonProcessOptionsFromHost(&g_DevExt);
662
663	/*
664	* Finally, create the device nodes.
665	*/
666	rc = vgdrvLinuxInitDeviceNodes();
667	if (rc >= 0)
668	{
669	/* some useful information for the user but don't show this on the console */
670	LogRel((DEVICE_NAME ": Successfully loaded version " VBOX_VERSION_STRING " r" __stringify(VBOX_SVN_REV) "\n"));
671	LogRel((DEVICE_NAME ": misc device minor %d, IRQ %d, I/O port %RTiop, MMIO at %RHp (size 0x%x)\n",
672	g_MiscDevice.minor, g_pPciDev->irq, g_IOPortBase, g_MMIOPhysAddr, g_cbMMIO));
673	printk(KERN_DEBUG DEVICE_NAME ": Successfully loaded version "
674	VBOX_VERSION_STRING " r" __stringify(VBOX_SVN_REV) " (interface " RT_XSTR(VMMDEV_VERSION) ")\n");
675	return rc;
676	}
677
678	/* bail out */
679	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
680	vgdrvLinuxTermInputDevice();
681	}
682	else
683	{
684	LogRel((DEVICE_NAME ": vboxguestCreateInputDevice failed with rc=%Rrc\n", rc));
685	rc = RTErrConvertFromErrno(rc);
686	}
687	VGDrvCommonCloseSession(&g_DevExt, g_pKernelSession);
688	}
689	#endif
690	vgdrvLinuxTermISR();
691	}
692	VGDrvCommonDeleteDevExt(&g_DevExt);
693	}
694	else
695	{
696	LogRel((DEVICE_NAME ": VGDrvCommonInitDevExt failed with rc=%Rrc\n", rc));
697	rc = RTErrConvertFromErrno(rc);
698	}
699	}
700	else
701	{
702	LogRel((DEVICE_NAME ": PCI device not found, probably running on physical hardware.\n"));
703	rc = -ENODEV;
704	}
705	pci_unregister_driver(&g_PciDriver);
706	RTLogDestroy(RTLogRelSetDefaultInstance(NULL));
707	RTLogDestroy(RTLogSetDefaultInstance(NULL));
708	RTR0Term();
709	return rc;
710	}
711
712
713	/**
714	* Unload the module.
715	*/
716	static void __exit vgdrvLinuxModExit(void)
717	{
718	/*
719	* Inverse order of init.
720	*/
721	vgdrvLinuxTermDeviceNodes();
722	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
723	vgdrvLinuxTermInputDevice();
724	VGDrvCommonCloseSession(&g_DevExt, g_pKernelSession);
725	#endif
726	vgdrvLinuxTermISR();
727	VGDrvCommonDeleteDevExt(&g_DevExt);
728	pci_unregister_driver(&g_PciDriver);
729	RTLogDestroy(RTLogRelSetDefaultInstance(NULL));
730	RTLogDestroy(RTLogSetDefaultInstance(NULL));
731	RTR0Term();
732	}
733
734
735	/**
736	* Get the process user ID.
737	*
738	* @returns UID.
739	*/
740	DECLINLINE(RTUID) vgdrvLinuxGetUid(void)
741	{
742	#if RTLNX_VER_MIN(2,6,29)
743	# if RTLNX_VER_MIN(3,5,0)
744	return from_kuid(current_user_ns(), current->cred->uid);
745	# else
746	return current->cred->uid;
747	# endif
748	#else
749	return current->uid;
750	#endif
751	}
752
753
754	/**
755	* Checks if the given group number is zero or not.
756	*
757	* @returns true / false.
758	* @param gid The group to check for.
759	*/
760	DECLINLINE(bool) vgdrvLinuxIsGroupZero(kgid_t gid)
761	{
762	#if RTLNX_VER_MIN(3,5,0)
763	return from_kgid(current_user_ns(), gid);
764	#else
765	return gid == 0;
766	#endif
767	}
768
769
770	/**
771	* Searches the effective group and supplementary groups for @a gid.
772	*
773	* @returns true if member, false if not.
774	* @param gid The group to check for.
775	*/
776	DECLINLINE(RTGID) vgdrvLinuxIsInGroupEff(kgid_t gid)
777	{
778	return in_egroup_p(gid) != 0;
779	}
780
781
782	/**
783	* Check if we can positively or negatively determine that the process is
784	* running under a login on the physical machine console.
785	*
786	* Havne't found a good way to figure this out for graphical sessions, so this
787	* is mostly pointless. But let us try do what we can do.
788	*
789	* @returns VMMDEV_REQUESTOR_CON_XXX.
790	*/
791	static uint32_t vgdrvLinuxRequestorOnConsole(void)
792	{
793	uint32_t fRet = VMMDEV_REQUESTOR_CON_DONT_KNOW;
794
795	#if RTLNX_VER_MIN(2,6,28) /* First with tty_kref_put(). */
796	/*
797	* Check for tty0..63, ASSUMING that these are only used for the physical console.
798	*/
799	struct tty_struct *pTty = get_current_tty();
800	if (pTty)
801	{
802	# if RTLNX_VER_MIN(4,2,0)
803	const char *pszName = tty_name(pTty);
804	# else
805	char szBuf[64];
806	const char *pszName = tty_name(pTty, szBuf);
807	# endif
808	if ( pszName
809	&& pszName[0] == 't'
810	&& pszName[1] == 't'
811	&& pszName[2] == 'y'
812	&& RT_C_IS_DIGIT(pszName[3])
813	&& ( pszName[4] == '\0'
814	\|\| ( RT_C_IS_DIGIT(pszName[4])
815	&& pszName[5] == '\0'
816	&& (pszName[3] - '0') * 10 + (pszName[4] - '0') <= 63)) )
817	fRet = VMMDEV_REQUESTOR_CON_YES;
818	tty_kref_put(pTty);
819	}
820	#endif
821
822	return fRet;
823	}
824
825
826	/**
827	* Device open. Called on open /dev/vboxdrv
828	*
829	* @param pInode Pointer to inode info structure.
830	* @param pFilp Associated file pointer.
831	*/
832	static int vgdrvLinuxOpen(struct inode pInode, struct file pFilp)
833	{
834	int rc;
835	PVBOXGUESTSESSION pSession;
836	uint32_t fRequestor;
837	Log((DEVICE_NAME ": pFilp=%p pid=%d/%d %s\n", pFilp, RTProcSelf(), current->pid, current->comm));
838
839	/*
840	* Figure out the requestor flags.
841	* ASSUMES that the gid of /dev/vboxuser is what we should consider the special vbox group.
842	*/
843	fRequestor = VMMDEV_REQUESTOR_USERMODE \| VMMDEV_REQUESTOR_TRUST_NOT_GIVEN;
844	if (vgdrvLinuxGetUid() == 0)
845	fRequestor \|= VMMDEV_REQUESTOR_USR_ROOT;
846	else
847	fRequestor \|= VMMDEV_REQUESTOR_USR_USER;
848	if (MINOR(pInode->i_rdev) == g_MiscDeviceUser.minor)
849	{
850	fRequestor \|= VMMDEV_REQUESTOR_USER_DEVICE;
851	if (!vgdrvLinuxIsGroupZero(pInode->i_gid) && vgdrvLinuxIsInGroupEff(pInode->i_gid))
852	fRequestor \|= VMMDEV_REQUESTOR_GRP_VBOX;
853	}
854	fRequestor \|= vgdrvLinuxRequestorOnConsole();
855
856	/*
857	* Call common code to create the user session. Associate it with
858	* the file so we can access it in the other methods.
859	*/
860	rc = VGDrvCommonCreateUserSession(&g_DevExt, fRequestor, &pSession);
861	if (RT_SUCCESS(rc))
862	pFilp->private_data = pSession;
863
864	Log(("vgdrvLinuxOpen: g_DevExt=%p pSession=%p rc=%d/%d (pid=%d/%d %s)\n",
865	&g_DevExt, pSession, rc, vgdrvLinuxConvertToNegErrno(rc), RTProcSelf(), current->pid, current->comm));
866	return vgdrvLinuxConvertToNegErrno(rc);
867	}
868
869
870	/**
871	* Close device.
872	*
873	* @param pInode Pointer to inode info structure.
874	* @param pFilp Associated file pointer.
875	*/
876	static int vgdrvLinuxRelease(struct inode pInode, struct file pFilp)
877	{
878	Log(("vgdrvLinuxRelease: pFilp=%p pSession=%p pid=%d/%d %s\n",
879	pFilp, pFilp->private_data, RTProcSelf(), current->pid, current->comm));
880
881	#if RTLNX_VER_MAX(2,6,28)
882	/* This housekeeping was needed in older kernel versions to ensure that
883	* the file pointer didn't get left on the polling queue. */
884	vgdrvLinuxFAsync(-1, pFilp, 0);
885	#endif
886	VGDrvCommonCloseSession(&g_DevExt, (PVBOXGUESTSESSION)pFilp->private_data);
887	pFilp->private_data = NULL;
888	return 0;
889	}
890
891
892	/**
893	* Device I/O Control entry point.
894	*
895	* @param pFilp Associated file pointer.
896	* @param uCmd The function specified to ioctl().
897	* @param ulArg The argument specified to ioctl().
898	*/
899	#if defined(HAVE_UNLOCKED_IOCTL) \|\| defined(DOXYGEN_RUNNING)
900	static long vgdrvLinuxIOCtl(struct file *pFilp, unsigned int uCmd, unsigned long ulArg)
901	#else
902	static int vgdrvLinuxIOCtl(struct inode pInode, struct file pFilp, unsigned int uCmd, unsigned long ulArg)
903	#endif
904	{
905	PVBOXGUESTSESSION pSession = (PVBOXGUESTSESSION)pFilp->private_data;
906	int rc;
907	#ifndef HAVE_UNLOCKED_IOCTL
908	unlock_kernel();
909	#endif
910
911	#if 0 /* no fast I/O controls defined atm. */
912	if (RT_LIKELY( ( uCmd == SUP_IOCTL_FAST_DO_RAW_RUN
913	\|\| uCmd == SUP_IOCTL_FAST_DO_HM_RUN
914	\|\| uCmd == SUP_IOCTL_FAST_DO_NOP)
915	&& pSession->fUnrestricted == true))
916	rc = VGDrvCommonIoCtlFast(uCmd, ulArg, &g_DevExt, pSession);
917	else
918	#endif
919	rc = vgdrvLinuxIOCtlSlow(pFilp, uCmd, ulArg, pSession);
920
921	#ifndef HAVE_UNLOCKED_IOCTL
922	lock_kernel();
923	#endif
924	return rc;
925	}
926
927
928	/**
929	* Device I/O Control entry point, slow variant.
930	*
931	* @param pFilp Associated file pointer.
932	* @param uCmd The function specified to ioctl().
933	* @param ulArg The argument specified to ioctl().
934	* @param pSession The session instance.
935	*/
936	static int vgdrvLinuxIOCtlSlow(struct file *pFilp, unsigned int uCmd, unsigned long ulArg, PVBOXGUESTSESSION pSession)
937	{
938	int rc;
939	VBGLREQHDR Hdr;
940	PVBGLREQHDR pHdr;
941	uint32_t cbBuf;
942
943	Log6(("vgdrvLinuxIOCtlSlow: pFilp=%p uCmd=%#x ulArg=%p pid=%d/%d\n", pFilp, uCmd, (void *)ulArg, RTProcSelf(), current->pid));
944
945	/*
946	* Read the header.
947	*/
948	if (RT_FAILURE(RTR0MemUserCopyFrom(&Hdr, ulArg, sizeof(Hdr))))
949	{
950	Log(("vgdrvLinuxIOCtlSlow: copy_from_user(,%#lx,) failed; uCmd=%#x\n", ulArg, uCmd));
951	return -EFAULT;
952	}
953	if (RT_UNLIKELY(Hdr.uVersion != VBGLREQHDR_VERSION))
954	{
955	Log(("vgdrvLinuxIOCtlSlow: bad header version %#x; uCmd=%#x\n", Hdr.uVersion, uCmd));
956	return -EINVAL;
957	}
958
959	/*
960	* Buffer the request.
961	* Note! The header is revalidated by the common code.
962	*/
963	cbBuf = RT_MAX(Hdr.cbIn, Hdr.cbOut);
964	if (RT_UNLIKELY(cbBuf > _1M*16))
965	{
966	Log(("vgdrvLinuxIOCtlSlow: too big cbBuf=%#x; uCmd=%#x\n", cbBuf, uCmd));
967	return -E2BIG;
968	}
969	if (RT_UNLIKELY( Hdr.cbIn < sizeof(Hdr)
970	\|\| (cbBuf != _IOC_SIZE(uCmd) && _IOC_SIZE(uCmd) != 0)))
971	{
972	Log(("vgdrvLinuxIOCtlSlow: bad ioctl cbBuf=%#x _IOC_SIZE=%#x; uCmd=%#x\n", cbBuf, _IOC_SIZE(uCmd), uCmd));
973	return -EINVAL;
974	}
975	pHdr = RTMemAlloc(cbBuf);
976	if (RT_UNLIKELY(!pHdr))
977	{
978	LogRel(("vgdrvLinuxIOCtlSlow: failed to allocate buffer of %d bytes for uCmd=%#x\n", cbBuf, uCmd));
979	return -ENOMEM;
980	}
981	if (RT_FAILURE(RTR0MemUserCopyFrom(pHdr, ulArg, Hdr.cbIn)))
982	{
983	Log(("vgdrvLinuxIOCtlSlow: copy_from_user(,%#lx, %#x) failed; uCmd=%#x\n", ulArg, Hdr.cbIn, uCmd));
984	RTMemFree(pHdr);
985	return -EFAULT;
986	}
987	if (Hdr.cbIn < cbBuf)
988	RT_BZERO((uint8_t *)pHdr + Hdr.cbIn, cbBuf - Hdr.cbIn);
989
990	/*
991	* Process the IOCtl.
992	*/
993	rc = VGDrvCommonIoCtl(uCmd, &g_DevExt, pSession, pHdr, cbBuf);
994
995	/*
996	* Copy ioctl data and output buffer back to user space.
997	*/
998	if (RT_SUCCESS(rc))
999	{
1000	uint32_t cbOut = pHdr->cbOut;
1001	if (RT_UNLIKELY(cbOut > cbBuf))
1002	{
1003	LogRel(("vgdrvLinuxIOCtlSlow: too much output! %#x > %#x; uCmd=%#x!\n", cbOut, cbBuf, uCmd));
1004	cbOut = cbBuf;
1005	}
1006	if (RT_FAILURE(RTR0MemUserCopyTo(ulArg, pHdr, cbOut)))
1007	{
1008	/* this is really bad! */
1009	LogRel(("vgdrvLinuxIOCtlSlow: copy_to_user(%#lx,,%#x); uCmd=%#x!\n", ulArg, cbOut, uCmd));
1010	rc = -EFAULT;
1011	}
1012	}
1013	else
1014	{
1015	Log(("vgdrvLinuxIOCtlSlow: pFilp=%p uCmd=%#x ulArg=%p failed, rc=%d\n", pFilp, uCmd, (void *)ulArg, rc));
1016	rc = -EINVAL;
1017	}
1018	RTMemFree(pHdr);
1019
1020	Log6(("vgdrvLinuxIOCtlSlow: returns %d (pid=%d/%d)\n", rc, RTProcSelf(), current->pid));
1021	return rc;
1022	}
1023
1024
1025	/**
1026	* @note This code is duplicated on other platforms with variations, so please
1027	* keep them all up to date when making changes!
1028	*/
1029	int VBOXCALL VBoxGuestIDC(void *pvSession, uintptr_t uReq, PVBGLREQHDR pReqHdr, size_t cbReq)
1030	{
1031	/*
1032	* Simple request validation (common code does the rest).
1033	*/
1034	int rc;
1035	if ( RT_VALID_PTR(pReqHdr)
1036	&& cbReq >= sizeof(*pReqHdr))
1037	{
1038	/*
1039	* All requests except the connect one requires a valid session.
1040	*/
1041	PVBOXGUESTSESSION pSession = (PVBOXGUESTSESSION)pvSession;
1042	if (pSession)
1043	{
1044	if ( RT_VALID_PTR(pSession)
1045	&& pSession->pDevExt == &g_DevExt)
1046	rc = VGDrvCommonIoCtl(uReq, &g_DevExt, pSession, pReqHdr, cbReq);
1047	else
1048	rc = VERR_INVALID_HANDLE;
1049	}
1050	else if (uReq == VBGL_IOCTL_IDC_CONNECT)
1051	{
1052	rc = VGDrvCommonCreateKernelSession(&g_DevExt, &pSession);
1053	if (RT_SUCCESS(rc))
1054	{
1055	rc = VGDrvCommonIoCtl(uReq, &g_DevExt, pSession, pReqHdr, cbReq);
1056	if (RT_FAILURE(rc))
1057	VGDrvCommonCloseSession(&g_DevExt, pSession);
1058	}
1059	}
1060	else
1061	rc = VERR_INVALID_HANDLE;
1062	}
1063	else
1064	rc = VERR_INVALID_POINTER;
1065	return rc;
1066	}
1067	EXPORT_SYMBOL(VBoxGuestIDC);
1068
1069
1070	/**
1071	* Asynchronous notification activation method.
1072	*
1073	* @returns 0 on success, negative errno on failure.
1074	*
1075	* @param fd The file descriptor.
1076	* @param pFile The file structure.
1077	* @param fOn On/off indicator.
1078	*/
1079	static int vgdrvLinuxFAsync(int fd, struct file *pFile, int fOn)
1080	{
1081	return fasync_helper(fd, pFile, fOn, &g_pFAsyncQueue);
1082	}
1083
1084
1085	/**
1086	* Poll function.
1087	*
1088	* This returns ready to read if the mouse pointer mode or the pointer position
1089	* has changed since last call to read.
1090	*
1091	* @returns 0 if no changes, POLLIN \| POLLRDNORM if there are unseen changes.
1092	*
1093	* @param pFile The file structure.
1094	* @param pPt The poll table.
1095	*
1096	* @remarks This is probably not really used, X11 is said to use the fasync
1097	* interface instead.
1098	*/
1099	static unsigned int vgdrvLinuxPoll(struct file pFile, poll_table pPt)
1100	{
1101	PVBOXGUESTSESSION pSession = (PVBOXGUESTSESSION)pFile->private_data;
1102	uint32_t u32CurSeq = ASMAtomicUoReadU32(&g_DevExt.u32MousePosChangedSeq);
1103	unsigned int fMask = pSession->u32MousePosChangedSeq != u32CurSeq
1104	? POLLIN \| POLLRDNORM
1105	: 0;
1106	poll_wait(pFile, &g_PollEventQueue, pPt);
1107	return fMask;
1108	}
1109
1110
1111	/**
1112	* Read to go with our poll/fasync response.
1113	*
1114	* @returns 1 or -EINVAL.
1115	*
1116	* @param pFile The file structure.
1117	* @param pbBuf The buffer to read into.
1118	* @param cbRead The max number of bytes to read.
1119	* @param poff The current file position.
1120	*
1121	* @remarks This is probably not really used as X11 lets the driver do its own
1122	* event reading. The poll condition is therefore also cleared when we
1123	* see VMMDevReq_GetMouseStatus in vgdrvIoCtl_VMMRequest.
1124	*/
1125	static ssize_t vgdrvLinuxRead(struct file pFile, char pbBuf, size_t cbRead, loff_t *poff)
1126	{
1127	PVBOXGUESTSESSION pSession = (PVBOXGUESTSESSION)pFile->private_data;
1128	uint32_t u32CurSeq = ASMAtomicUoReadU32(&g_DevExt.u32MousePosChangedSeq);
1129
1130	if (*poff != 0)
1131	return -EINVAL;
1132
1133	/*
1134	* Fake a single byte read if we're not up to date with the current mouse position.
1135	*/
1136	if ( pSession->u32MousePosChangedSeq != u32CurSeq
1137	&& cbRead > 0)
1138	{
1139	pSession->u32MousePosChangedSeq = u32CurSeq;
1140	pbBuf[0] = 0;
1141	return 1;
1142	}
1143	return 0;
1144	}
1145
1146
1147	void VGDrvNativeISRMousePollEvent(PVBOXGUESTDEVEXT pDevExt)
1148	{
1149	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
1150	int rc;
1151	#endif
1152	NOREF(pDevExt);
1153
1154	/*
1155	* Wake up everyone that's in a poll() and post anyone that has
1156	* subscribed to async notifications.
1157	*/
1158	Log3(("VGDrvNativeISRMousePollEvent: wake_up_all\n"));
1159	wake_up_all(&g_PollEventQueue);
1160	Log3(("VGDrvNativeISRMousePollEvent: kill_fasync\n"));
1161	kill_fasync(&g_pFAsyncQueue, SIGIO, POLL_IN);
1162	#ifdef VBOXGUEST_WITH_INPUT_DRIVER
1163	/* Report events to the kernel input device */
1164	g_pMouseStatusReq->mouseFeatures = 0;
1165	g_pMouseStatusReq->pointerXPos = 0;
1166	g_pMouseStatusReq->pointerYPos = 0;
1167	rc = VbglR0GRPerform(&g_pMouseStatusReq->header);
1168	if (RT_SUCCESS(rc))
1169	{
1170	input_report_abs(g_pInputDevice, ABS_X,
1171	g_pMouseStatusReq->pointerXPos);
1172	input_report_abs(g_pInputDevice, ABS_Y,
1173	g_pMouseStatusReq->pointerYPos);
1174	# ifdef EV_SYN
1175	input_sync(g_pInputDevice);
1176	# endif
1177	}
1178	#endif
1179	Log3(("VGDrvNativeISRMousePollEvent: done\n"));
1180	}
1181
1182
1183	bool VGDrvNativeProcessOption(PVBOXGUESTDEVEXT pDevExt, const char pszName, const char pszValue)
1184	{
1185	RT_NOREF(pDevExt); RT_NOREF(pszName); RT_NOREF(pszValue);
1186	return false;
1187	}
1188
1189
1190	#if RTLNX_VER_MIN(2,6,0)
1191
1192	/** log and dbg_log parameter setter. */
1193	static int vgdrvLinuxParamLogGrpSet(const char pszValue, CONST_4_15 struct kernel_param pParam)
1194	{
1195	if (g_fLoggerCreated)
1196	{
1197	PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
1198	if (pLogger)
1199	RTLogGroupSettings(pLogger, pszValue);
1200	}
1201	else if (pParam->name[0] != 'd')
1202	strlcpy(&g_szLogGrp[0], pszValue, sizeof(g_szLogGrp));
1203
1204	return 0;
1205	}
1206
1207	/** log and dbg_log parameter getter. */
1208	static int vgdrvLinuxParamLogGrpGet(char pszBuf, CONST_4_15 struct kernel_param pParam)
1209	{
1210	PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
1211	*pszBuf = '\0';
1212	if (pLogger)
1213	RTLogQueryGroupSettings(pLogger, pszBuf, _4K);
1214	return strlen(pszBuf);
1215	}
1216
1217
1218	/** log and dbg_log_flags parameter setter. */
1219	static int vgdrvLinuxParamLogFlagsSet(const char pszValue, CONST_4_15 struct kernel_param pParam)
1220	{
1221	if (g_fLoggerCreated)
1222	{
1223	PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
1224	if (pLogger)
1225	RTLogFlags(pLogger, pszValue);
1226	}
1227	else if (pParam->name[0] != 'd')
1228	strlcpy(&g_szLogFlags[0], pszValue, sizeof(g_szLogFlags));
1229	return 0;
1230	}
1231
1232	/** log and dbg_log_flags parameter getter. */
1233	static int vgdrvLinuxParamLogFlagsGet(char pszBuf, CONST_4_15 struct kernel_param pParam)
1234	{
1235	PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
1236	*pszBuf = '\0';
1237	if (pLogger)
1238	RTLogQueryFlags(pLogger, pszBuf, _4K);
1239	return strlen(pszBuf);
1240	}
1241
1242
1243	/** log and dbg_log_dest parameter setter. */
1244	static int vgdrvLinuxParamLogDstSet(const char pszValue, CONST_4_15 struct kernel_param pParam)
1245	{
1246	if (g_fLoggerCreated)
1247	{
1248	PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
1249	if (pLogger)
1250	RTLogDestinations(pLogger, pszValue);
1251	}
1252	else if (pParam->name[0] != 'd')
1253	strlcpy(&g_szLogDst[0], pszValue, sizeof(g_szLogDst));
1254	return 0;
1255	}
1256
1257	/** log and dbg_log_dest parameter getter. */
1258	static int vgdrvLinuxParamLogDstGet(char pszBuf, CONST_4_15 struct kernel_param pParam)
1259	{
1260	PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
1261	*pszBuf = '\0';
1262	if (pLogger)
1263	RTLogQueryDestinations(pLogger, pszBuf, _4K);
1264	return strlen(pszBuf);
1265	}
1266
1267
1268	/** r3_log_to_host parameter setter. */
1269	static int vgdrvLinuxParamR3LogToHostSet(const char pszValue, CONST_4_15 struct kernel_param pParam)
1270	{
1271	g_DevExt.fLoggingEnabled = VBDrvCommonIsOptionValueTrue(pszValue);
1272	return 0;
1273	}
1274
1275	/** r3_log_to_host parameter getter. */
1276	static int vgdrvLinuxParamR3LogToHostGet(char pszBuf, CONST_4_15 struct kernel_param pParam)
1277	{
1278	strcpy(pszBuf, g_DevExt.fLoggingEnabled ? "enabled" : "disabled");
1279	return strlen(pszBuf);
1280	}
1281
1282
1283	/*
1284	* Define module parameters.
1285	*/
1286	module_param_call(log, vgdrvLinuxParamLogGrpSet, vgdrvLinuxParamLogGrpGet, NULL, 0664);
1287	module_param_call(log_flags, vgdrvLinuxParamLogFlagsSet, vgdrvLinuxParamLogFlagsGet, NULL, 0664);
1288	module_param_call(log_dest, vgdrvLinuxParamLogDstSet, vgdrvLinuxParamLogDstGet, NULL, 0664);
1289	# ifdef LOG_ENABLED
1290	module_param_call(dbg_log, vgdrvLinuxParamLogGrpSet, vgdrvLinuxParamLogGrpGet, NULL, 0664);
1291	module_param_call(dbg_log_flags, vgdrvLinuxParamLogFlagsSet, vgdrvLinuxParamLogFlagsGet, NULL, 0664);
1292	module_param_call(dbg_log_dest, vgdrvLinuxParamLogDstSet, vgdrvLinuxParamLogDstGet, NULL, 0664);
1293	# endif
1294	module_param_call(r3_log_to_host, vgdrvLinuxParamR3LogToHostSet, vgdrvLinuxParamR3LogToHostGet, NULL, 0664);
1295
1296	#endif /* 2.6.0 and later */
1297
1298
1299	module_init(vgdrvLinuxModInit);
1300	module_exit(vgdrvLinuxModExit);
1301
1302	MODULE_AUTHOR(VBOX_VENDOR);
1303	MODULE_DESCRIPTION(VBOX_PRODUCT " Guest Additions for Linux Module");
1304	MODULE_LICENSE("GPL");
1305	#ifdef MODULE_VERSION
1306	MODULE_VERSION(VBOX_VERSION_STRING " r" RT_XSTR(VBOX_SVN_REV));
1307	#endif
1308

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source: vbox/trunk/src/VBox/Additions/common/VBoxGuest/VBoxGuest-linux.c@ 93516

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