DrvHostBase-darwin.cpp@ 92197

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1	/* $Id: DrvHostBase-darwin.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
2	/** @file
3	* DrvHostBase - Host base drive access driver, OS X specifics.
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	* Header Files *
21	*********************************************************************************************************************************/
22	#define LOG_GROUP LOG_GROUP_DRV_HOST_BASE
23	#include <mach/mach.h>
24	#include <Carbon/Carbon.h>
25	#include <IOKit/IOKitLib.h>
26	#include <IOKit/storage/IOStorageDeviceCharacteristics.h>
27	#include <IOKit/scsi/SCSITaskLib.h>
28	#include <IOKit/scsi/SCSICommandOperationCodes.h>
29	#include <IOKit/IOBSD.h>
30	#include <DiskArbitration/DiskArbitration.h>
31	#include <mach/mach_error.h>
32	#include <VBox/err.h>
33	#include <VBox/scsi.h>
34	#include <iprt/string.h>
35
36
37	/**
38	* Host backend specific data.
39	*/
40	typedef struct DRVHOSTBASEOS
41	{
42	/** The master port. */
43	mach_port_t MasterPort;
44	/** The MMC-2 Device Interface. (This is only used to get the scsi task interface.) */
45	MMCDeviceInterface **ppMMCDI;
46	/** The SCSI Task Device Interface. */
47	SCSITaskDeviceInterface **ppScsiTaskDI;
48	/** The block size. Set when querying the media size. */
49	uint32_t cbBlock;
50	/** The disk arbitration session reference. NULL if we didn't have to claim & unmount the device. */
51	DASessionRef pDASession;
52	/** The disk arbitration disk reference. NULL if we didn't have to claim & unmount the device. */
53	DADiskRef pDADisk;
54	/** The number of errors that could go into the release log. (flood gate) */
55	uint32_t cLogRelErrors;
56	} DRVHOSTBASEOS;
57	/** Pointer to the host backend specific data. */
58	typedef DRVHOSTBASEOS *PDRVHOSBASEOS;
59	AssertCompile(sizeof(DRVHOSTBASEOS) <= 64);
60
61	#define DRVHOSTBASE_OS_INT_DECLARED
62	#include "DrvHostBase.h"
63
64
65	/*********************************************************************************************************************************
66	* Defined Constants And Macros *
67	*********************************************************************************************************************************/
68	/** Maximum buffer size we support, check whether darwin has some real upper limit. */
69	#define DARWIN_SCSI_MAX_BUFFER_SIZE (100 * _1K)
70
71	/** The runloop input source name for the disk arbitration events. */
72	#define MY_RUN_LOOP_MODE CFSTR("drvHostBaseDA") /** @todo r=bird: Check if this will cause trouble in the same way that the one in the USB code did. */
73
74
75
76	/**
77	* Gets the BSD Name (/dev/disc[0-9]+) for the service.
78	*
79	* This is done by recursing down the I/O registry until we hit upon an entry
80	* with a BSD Name. Usually we find it two levels down. (Further down under
81	* the IOCDPartitionScheme, the volume (slices) BSD Name is found. We don't
82	* seem to have to go this far fortunately.)
83	*
84	* @return VINF_SUCCESS if found, VERR_FILE_NOT_FOUND otherwise.
85	* @param Entry The current I/O registry entry reference.
86	* @param pszName Where to store the name. 128 bytes.
87	* @param cRecursions Number of recursions. This is used as an precaution
88	* just to limit the depth and avoid blowing the stack
89	* should we hit a bug or something.
90	*/
91	static int drvHostBaseGetBSDName(io_registry_entry_t Entry, char *pszName, unsigned cRecursions)
92	{
93	int rc = VERR_FILE_NOT_FOUND;
94	io_iterator_t Children = 0;
95	kern_return_t krc = IORegistryEntryGetChildIterator(Entry, kIOServicePlane, &Children);
96	if (krc == KERN_SUCCESS)
97	{
98	io_object_t Child;
99	while ( rc == VERR_FILE_NOT_FOUND
100	&& (Child = IOIteratorNext(Children)) != 0)
101	{
102	CFStringRef BSDNameStrRef = (CFStringRef)IORegistryEntryCreateCFProperty(Child, CFSTR(kIOBSDNameKey), kCFAllocatorDefault, 0);
103	if (BSDNameStrRef)
104	{
105	if (CFStringGetCString(BSDNameStrRef, pszName, 128, kCFStringEncodingUTF8))
106	rc = VINF_SUCCESS;
107	else
108	AssertFailed();
109	CFRelease(BSDNameStrRef);
110	}
111	if (rc == VERR_FILE_NOT_FOUND && cRecursions < 10)
112	rc = drvHostBaseGetBSDName(Child, pszName, cRecursions + 1);
113	IOObjectRelease(Child);
114	}
115	IOObjectRelease(Children);
116	}
117	return rc;
118	}
119
120
121	/**
122	* Callback notifying us that the async DADiskClaim()/DADiskUnmount call has completed.
123	*
124	* @param DiskRef The disk that was attempted claimed / unmounted.
125	* @param DissenterRef NULL on success, contains details on failure.
126	* @param pvContext Pointer to the return code variable.
127	*/
128	static void drvHostBaseDADoneCallback(DADiskRef DiskRef, DADissenterRef DissenterRef, void *pvContext)
129	{
130	RT_NOREF(DiskRef);
131	int prc = (int )pvContext;
132	if (!DissenterRef)
133	*prc = 0;
134	else
135	*prc = DADissenterGetStatus(DissenterRef) ? DADissenterGetStatus(DissenterRef) : -1;
136	CFRunLoopStop(CFRunLoopGetCurrent());
137	}
138
139
140	/**
141	* Obtain exclusive access to the DVD device, umount it if necessary.
142	*
143	* @return VBox status code.
144	* @param pThis The driver instance.
145	* @param DVDService The DVD service object.
146	*/
147	static int drvHostBaseObtainExclusiveAccess(PDRVHOSTBASE pThis, io_object_t DVDService)
148	{
149	PPDMDRVINS pDrvIns = pThis->pDrvIns; NOREF(pDrvIns);
150
151	for (unsigned iTry = 0;; iTry++)
152	{
153	IOReturn irc = (*pThis->Os.ppScsiTaskDI)->ObtainExclusiveAccess(pThis->Os.ppScsiTaskDI);
154	if (irc == kIOReturnSuccess)
155	{
156	/*
157	* This is a bit weird, but if we unmounted the DVD drive we also need to
158	* unlock it afterwards or the guest won't be able to eject it later on.
159	*/
160	if (pThis->Os.pDADisk)
161	{
162	uint8_t abCmd[16] =
163	{
164	SCSI_PREVENT_ALLOW_MEDIUM_REMOVAL, 0, 0, 0, false, 0,
165	0,0,0,0,0,0,0,0,0,0
166	};
167	drvHostBaseScsiCmdOs(pThis, abCmd, 6, PDMMEDIATXDIR_NONE, NULL, NULL, NULL, 0, 0);
168	}
169	return VINF_SUCCESS;
170	}
171	if (irc == kIOReturnExclusiveAccess)
172	return VERR_SHARING_VIOLATION; /* already used exclusivly. */
173	if (irc != kIOReturnBusy)
174	return VERR_GENERAL_FAILURE; /* not mounted */
175
176	/*
177	* Attempt to the unmount all volumes of the device.
178	* It seems we can can do this all in one go without having to enumerate the
179	* volumes (sessions) and deal with them one by one. This is very fortuitous
180	* as the disk arbitration API is a bit cumbersome to deal with.
181	*/
182	if (iTry > 2)
183	return VERR_DRIVE_LOCKED;
184	char szName[128];
185	int rc = drvHostBaseGetBSDName(DVDService, &szName[0], 0);
186	if (RT_SUCCESS(rc))
187	{
188	pThis->Os.pDASession = DASessionCreate(kCFAllocatorDefault);
189	if (pThis->Os.pDASession)
190	{
191	DASessionScheduleWithRunLoop(pThis->Os.pDASession, CFRunLoopGetCurrent(), MY_RUN_LOOP_MODE);
192	pThis->Os.pDADisk = DADiskCreateFromBSDName(kCFAllocatorDefault, pThis->Os.pDASession, szName);
193	if (pThis->Os.pDADisk)
194	{
195	/*
196	* Try claim the device.
197	*/
198	Log(("%s-%d: calling DADiskClaim on '%s'.\n", pDrvIns->pReg->szName, pDrvIns->iInstance, szName));
199	int rcDA = -2;
200	DADiskClaim(pThis->Os.pDADisk, kDADiskClaimOptionDefault, NULL, NULL, drvHostBaseDADoneCallback, &rcDA);
201	SInt32 rc32 = CFRunLoopRunInMode(MY_RUN_LOOP_MODE, 120.0, FALSE);
202	AssertMsg(rc32 == kCFRunLoopRunStopped, ("rc32=%RI32 (%RX32)\n", rc32, rc32));
203	if ( rc32 == kCFRunLoopRunStopped
204	&& !rcDA)
205	{
206	/*
207	* Try unmount the device.
208	*/
209	Log(("%s-%d: calling DADiskUnmount on '%s'.\n", pDrvIns->pReg->szName, pDrvIns->iInstance, szName));
210	rcDA = -2;
211	DADiskUnmount(pThis->Os.pDADisk, kDADiskUnmountOptionWhole, drvHostBaseDADoneCallback, &rcDA);
212	rc32 = CFRunLoopRunInMode(MY_RUN_LOOP_MODE, 120.0, FALSE);
213	AssertMsg(rc32 == kCFRunLoopRunStopped, ("rc32=%RI32 (%RX32)\n", rc32, rc32));
214	if ( rc32 == kCFRunLoopRunStopped
215	&& !rcDA)
216	{
217	iTry = 99;
218	DASessionUnscheduleFromRunLoop(pThis->Os.pDASession, CFRunLoopGetCurrent(), MY_RUN_LOOP_MODE);
219	Log(("%s-%d: unmount succeed - retrying.\n", pDrvIns->pReg->szName, pDrvIns->iInstance));
220	continue;
221	}
222	Log(("%s-%d: umount => rc32=%d & rcDA=%#x\n", pDrvIns->pReg->szName, pDrvIns->iInstance, rc32, rcDA));
223
224	/* failed - cleanup */
225	DADiskUnclaim(pThis->Os.pDADisk);
226	}
227	else
228	Log(("%s-%d: claim => rc32=%d & rcDA=%#x\n", pDrvIns->pReg->szName, pDrvIns->iInstance, rc32, rcDA));
229
230	CFRelease(pThis->Os.pDADisk);
231	pThis->Os.pDADisk = NULL;
232	}
233	else
234	Log(("%s-%d: failed to open disk '%s'!\n", pDrvIns->pReg->szName, pDrvIns->iInstance, szName));
235
236	DASessionUnscheduleFromRunLoop(pThis->Os.pDASession, CFRunLoopGetCurrent(), MY_RUN_LOOP_MODE);
237	CFRelease(pThis->Os.pDASession);
238	pThis->Os.pDASession = NULL;
239	}
240	else
241	Log(("%s-%d: failed to create DA session!\n", pDrvIns->pReg->szName, pDrvIns->iInstance));
242	}
243	RTThreadSleep(10);
244	}
245	}
246
247	DECLHIDDEN(int) drvHostBaseScsiCmdOs(PDRVHOSTBASE pThis, const uint8_t *pbCmd, size_t cbCmd, PDMMEDIATXDIR enmTxDir,
248	void pvBuf, uint32_t pcbBuf, uint8_t *pbSense, size_t cbSense, uint32_t cTimeoutMillies)
249	{
250	/*
251	* Minimal input validation.
252	*/
253	Assert(enmTxDir == PDMMEDIATXDIR_NONE \|\| enmTxDir == PDMMEDIATXDIR_FROM_DEVICE \|\| enmTxDir == PDMMEDIATXDIR_TO_DEVICE);
254	Assert(!pvBuf \|\| pcbBuf);
255	Assert(pvBuf \|\| enmTxDir == PDMMEDIATXDIR_NONE);
256	Assert(pbSense \|\| !cbSense);
257	AssertPtr(pbCmd);
258	Assert(cbCmd <= 16 && cbCmd >= 1);
259	const uint32_t cbBuf = pcbBuf ? *pcbBuf : 0;
260	if (pcbBuf)
261	*pcbBuf = 0;
262
263	Assert(pThis->Os.ppScsiTaskDI);
264
265	int rc = VERR_GENERAL_FAILURE;
266	SCSITaskInterface *ppScsiTaskI = (pThis->Os.ppScsiTaskDI)->CreateSCSITask(pThis->Os.ppScsiTaskDI);
267	if (!ppScsiTaskI)
268	return VERR_NO_MEMORY;
269	do
270	{
271	/* Setup the scsi command. */
272	SCSICommandDescriptorBlock cdb = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
273	memcpy(&cdb[0], pbCmd, cbCmd);
274	IOReturn irc = (*ppScsiTaskI)->SetCommandDescriptorBlock(ppScsiTaskI, cdb, cbCmd);
275	AssertBreak(irc == kIOReturnSuccess);
276
277	/* Setup the buffer. */
278	if (enmTxDir == PDMMEDIATXDIR_NONE)
279	irc = (*ppScsiTaskI)->SetScatterGatherEntries(ppScsiTaskI, NULL, 0, 0, kSCSIDataTransfer_NoDataTransfer);
280	else
281	{
282	IOVirtualRange Range = { (IOVirtualAddress)pvBuf, cbBuf };
283	irc = (*ppScsiTaskI)->SetScatterGatherEntries(ppScsiTaskI, &Range, 1, cbBuf,
284	enmTxDir == PDMMEDIATXDIR_FROM_DEVICE
285	? kSCSIDataTransfer_FromTargetToInitiator
286	: kSCSIDataTransfer_FromInitiatorToTarget);
287	}
288	AssertBreak(irc == kIOReturnSuccess);
289
290	/* Set the timeout. */
291	irc = (ppScsiTaskI)->SetTimeoutDuration(ppScsiTaskI, cTimeoutMillies ? cTimeoutMillies : 30000 /ms*/);
292	AssertBreak(irc == kIOReturnSuccess);
293
294	/* Execute the command and get the response. */
295	SCSI_Sense_Data SenseData = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
296	SCSIServiceResponse ServiceResponse = kSCSIServiceResponse_Request_In_Process;
297	SCSITaskStatus TaskStatus = kSCSITaskStatus_GOOD;
298	UInt64 cbReturned = 0;
299	irc = (*ppScsiTaskI)->ExecuteTaskSync(ppScsiTaskI, &SenseData, &TaskStatus, &cbReturned);
300	AssertBreak(irc == kIOReturnSuccess);
301	if (pcbBuf)
302	*pcbBuf = (int32_t)cbReturned;
303
304	irc = (*ppScsiTaskI)->GetSCSIServiceResponse(ppScsiTaskI, &ServiceResponse);
305	AssertBreak(irc == kIOReturnSuccess);
306	AssertBreak(ServiceResponse == kSCSIServiceResponse_TASK_COMPLETE);
307
308	if (TaskStatus == kSCSITaskStatus_GOOD)
309	rc = VINF_SUCCESS;
310	else if ( TaskStatus == kSCSITaskStatus_CHECK_CONDITION
311	&& pbSense)
312	{
313	memset(pbSense, 0, cbSense); /* lazy */
314	memcpy(pbSense, &SenseData, RT_MIN(sizeof(SenseData), cbSense));
315	rc = VERR_UNRESOLVED_ERROR;
316	}
317	/** @todo convert sense codes when caller doesn't wish to do this himself. */
318	/*else if ( TaskStatus == kSCSITaskStatus_CHECK_CONDITION
319	&& SenseData.ADDITIONAL_SENSE_CODE == 0x3A)
320	rc = VERR_MEDIA_NOT_PRESENT; */
321	else
322	{
323	rc = enmTxDir == PDMMEDIATXDIR_NONE
324	? VERR_DEV_IO_ERROR
325	: enmTxDir == PDMMEDIATXDIR_FROM_DEVICE
326	? VERR_READ_ERROR
327	: VERR_WRITE_ERROR;
328	if (pThis->Os.cLogRelErrors++ < 10)
329	LogRel(("DVD scsi error: cmd={%.*Rhxs} TaskStatus=%#x key=%#x ASC=%#x ASCQ=%#x (%Rrc)\n",
330	cbCmd, pbCmd, TaskStatus, SenseData.SENSE_KEY, SenseData.ADDITIONAL_SENSE_CODE,
331	SenseData.ADDITIONAL_SENSE_CODE_QUALIFIER, rc));
332	}
333	} while (0);
334
335	(*ppScsiTaskI)->Release(ppScsiTaskI);
336
337	return rc;
338	}
339
340
341	DECLHIDDEN(size_t) drvHostBaseScsiCmdGetBufLimitOs(PDRVHOSTBASE pThis)
342	{
343	RT_NOREF(pThis);
344
345	return DARWIN_SCSI_MAX_BUFFER_SIZE;
346	}
347
348
349	DECLHIDDEN(int) drvHostBaseGetMediaSizeOs(PDRVHOSTBASE pThis, uint64_t *pcb)
350	{
351	/*
352	* Try a READ_CAPACITY command...
353	*/
354	struct
355	{
356	uint32_t cBlocks;
357	uint32_t cbBlock;
358	} Buf = {0, 0};
359	uint32_t cbBuf = sizeof(Buf);
360	uint8_t abCmd[16] =
361	{
362	SCSI_READ_CAPACITY, 0, 0, 0, 0, 0, 0,
363	0,0,0,0,0,0,0,0,0
364	};
365	int rc = drvHostBaseScsiCmdOs(pThis, abCmd, 6, PDMMEDIATXDIR_FROM_DEVICE, &Buf, &cbBuf, NULL, 0, 0);
366	if (RT_SUCCESS(rc))
367	{
368	Assert(cbBuf == sizeof(Buf));
369	Buf.cBlocks = RT_BE2H_U32(Buf.cBlocks);
370	Buf.cbBlock = RT_BE2H_U32(Buf.cbBlock);
371	//if (Buf.cbBlock > 2048) /* everyone else is doing this... check if it needed/right.*/
372	// Buf.cbBlock = 2048;
373	pThis->Os.cbBlock = Buf.cbBlock;
374
375	pcb = (uint64_t)Buf.cBlocks Buf.cbBlock;
376	}
377	return rc;
378	}
379
380
381	DECLHIDDEN(int) drvHostBaseReadOs(PDRVHOSTBASE pThis, uint64_t off, void *pvBuf, size_t cbRead)
382	{
383	int rc = VINF_SUCCESS;
384
385	if ( pThis->Os.ppScsiTaskDI
386	&& pThis->Os.cbBlock)
387	{
388	/*
389	* Issue a READ(12) request.
390	*/
391	do
392	{
393	const uint32_t LBA = off / pThis->Os.cbBlock;
394	AssertReturn(!(off % pThis->Os.cbBlock), VERR_INVALID_PARAMETER);
395	uint32_t cbRead32 = cbRead > SCSI_MAX_BUFFER_SIZE
396	? SCSI_MAX_BUFFER_SIZE
397	: (uint32_t)cbRead;
398	const uint32_t cBlocks = cbRead32 / pThis->Os.cbBlock;
399	AssertReturn(!(cbRead % pThis->Os.cbBlock), VERR_INVALID_PARAMETER);
400	uint8_t abCmd[16] =
401	{
402	SCSI_READ_12, 0,
403	RT_BYTE4(LBA), RT_BYTE3(LBA), RT_BYTE2(LBA), RT_BYTE1(LBA),
404	RT_BYTE4(cBlocks), RT_BYTE3(cBlocks), RT_BYTE2(cBlocks), RT_BYTE1(cBlocks),
405	0, 0, 0, 0, 0
406	};
407	rc = drvHostBaseScsiCmdOs(pThis, abCmd, 12, PDMMEDIATXDIR_FROM_DEVICE, pvBuf, &cbRead32, NULL, 0, 0);
408
409	off += cbRead32;
410	cbRead -= cbRead32;
411	pvBuf = (uint8_t *)pvBuf + cbRead32;
412	} while ((cbRead > 0) && RT_SUCCESS(rc));
413	}
414	else
415	rc = VERR_MEDIA_NOT_PRESENT;
416
417	return rc;
418	}
419
420
421	DECLHIDDEN(int) drvHostBaseWriteOs(PDRVHOSTBASE pThis, uint64_t off, const void *pvBuf, size_t cbWrite)
422	{
423	RT_NOREF4(pThis, off, pvBuf, cbWrite);
424	return VERR_WRITE_PROTECT;
425	}
426
427
428	DECLHIDDEN(int) drvHostBaseFlushOs(PDRVHOSTBASE pThis)
429	{
430	RT_NOREF1(pThis);
431	return VINF_SUCCESS;
432	}
433
434
435	DECLHIDDEN(int) drvHostBaseDoLockOs(PDRVHOSTBASE pThis, bool fLock)
436	{
437	uint8_t abCmd[16] =
438	{
439	SCSI_PREVENT_ALLOW_MEDIUM_REMOVAL, 0, 0, 0, fLock, 0,
440	0,0,0,0,0,0,0,0,0,0
441	};
442	return drvHostBaseScsiCmdOs(pThis, abCmd, 6, PDMMEDIATXDIR_NONE, NULL, NULL, NULL, 0, 0);
443	}
444
445
446	DECLHIDDEN(int) drvHostBaseEjectOs(PDRVHOSTBASE pThis)
447	{
448	uint8_t abCmd[16] =
449	{
450	SCSI_START_STOP_UNIT, 0, 0, 0, 2 /eject+stop/, 0,
451	0,0,0,0,0,0,0,0,0,0
452	};
453	return drvHostBaseScsiCmdOs(pThis, abCmd, 6, PDMMEDIATXDIR_NONE, NULL, NULL, NULL, 0, 0);
454	}
455
456
457	DECLHIDDEN(int) drvHostBaseQueryMediaStatusOs(PDRVHOSTBASE pThis, bool pfMediaChanged, bool pfMediaPresent)
458	{
459	AssertReturn(pThis->Os.ppScsiTaskDI, VERR_INTERNAL_ERROR);
460
461	/*
462	* Issue a TEST UNIT READY request.
463	*/
464	*pfMediaChanged = false;
465	*pfMediaPresent = false;
466	uint8_t abCmd[16] = { SCSI_TEST_UNIT_READY, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
467	uint8_t abSense[32];
468	int rc = drvHostBaseScsiCmdOs(pThis, abCmd, 6, PDMMEDIATXDIR_NONE, NULL, NULL, abSense, sizeof(abSense), 0);
469	if (RT_SUCCESS(rc))
470	*pfMediaPresent = true;
471	else if ( rc == VERR_UNRESOLVED_ERROR
472	&& abSense[2] == 6 /* unit attention */
473	&& ( (abSense[12] == 0x29 && abSense[13] < 5 /* reset */)
474	\|\| (abSense[12] == 0x2a && abSense[13] == 0 /* parameters changed */) //???
475	\|\| (abSense[12] == 0x3f && abSense[13] == 0 /* target operating conditions have changed */) //???
476	\|\| (abSense[12] == 0x3f && abSense[13] == 2 /* changed operating definition */) //???
477	\|\| (abSense[12] == 0x3f && abSense[13] == 3 /* inquiry parameters changed */)
478	\|\| (abSense[12] == 0x3f && abSense[13] == 5 /* device identifier changed */)
479	)
480	)
481	{
482	*pfMediaPresent = false;
483	*pfMediaChanged = true;
484	rc = VINF_SUCCESS;
485	/** @todo check this media change stuff on Darwin. */
486	}
487
488	return rc;
489	}
490
491
492	DECLHIDDEN(void) drvHostBaseInitOs(PDRVHOSTBASE pThis)
493	{
494	pThis->Os.MasterPort = IO_OBJECT_NULL;
495	pThis->Os.ppMMCDI = NULL;
496	pThis->Os.ppScsiTaskDI = NULL;
497	pThis->Os.cbBlock = 0;
498	pThis->Os.pDADisk = NULL;
499	pThis->Os.pDASession = NULL;
500	}
501
502
503	DECLHIDDEN(int) drvHostBaseOpenOs(PDRVHOSTBASE pThis, bool fReadOnly)
504	{
505	RT_NOREF(fReadOnly);
506
507	/* Darwin is kind of special... */
508	Assert(!pThis->Os.cbBlock);
509	Assert(pThis->Os.MasterPort == IO_OBJECT_NULL);
510	Assert(!pThis->Os.ppMMCDI);
511	Assert(!pThis->Os.ppScsiTaskDI);
512
513	/*
514	* Open the master port on the first invocation.
515	*/
516	kern_return_t krc = IOMasterPort(MACH_PORT_NULL, &pThis->Os.MasterPort);
517	AssertReturn(krc == KERN_SUCCESS, VERR_GENERAL_FAILURE);
518
519	/*
520	* Create a matching dictionary for searching for CD, DVD and BlueRay services in the IOKit.
521	*
522	* The idea is to find all the devices which are of class IOCDBlockStorageDevice.
523	* CD devices are represented by IOCDBlockStorageDevice class itself, while DVD and BlueRay ones
524	* have it as a parent class.
525	*/
526	CFMutableDictionaryRef RefMatchingDict = IOServiceMatching("IOCDBlockStorageDevice");
527	AssertReturn(RefMatchingDict, VERR_NOT_FOUND);
528
529	/*
530	* do the search and get a collection of keyboards.
531	*/
532	io_iterator_t DVDServices = IO_OBJECT_NULL;
533	IOReturn irc = IOServiceGetMatchingServices(pThis->Os.MasterPort, RefMatchingDict, &DVDServices);
534	AssertMsgReturn(irc == kIOReturnSuccess, ("irc=%d\n", irc), VERR_NOT_FOUND);
535	RefMatchingDict = NULL; /* the reference is consumed by IOServiceGetMatchingServices. */
536
537	/*
538	* Enumerate the matching drives (services).
539	* (This enumeration must be identical to the one performed in Main/src-server/darwin/iokit.cpp.)
540	*/
541	int rc = VERR_FILE_NOT_FOUND;
542	unsigned i = 0;
543	io_object_t DVDService;
544	while ((DVDService = IOIteratorNext(DVDServices)) != 0)
545	{
546	/*
547	* Get the properties we use to identify the DVD drive.
548	*
549	* While there is a (weird 12 byte) GUID, it isn't persistent
550	* across boots. So, we have to use a combination of the
551	* vendor name and product name properties with an optional
552	* sequence number for identification.
553	*/
554	CFMutableDictionaryRef PropsRef = 0;
555	krc = IORegistryEntryCreateCFProperties(DVDService, &PropsRef, kCFAllocatorDefault, kNilOptions);
556	if (krc == KERN_SUCCESS)
557	{
558	/* Get the Device Characteristics dictionary. */
559	CFDictionaryRef DevCharRef = (CFDictionaryRef)CFDictionaryGetValue(PropsRef, CFSTR(kIOPropertyDeviceCharacteristicsKey));
560	if (DevCharRef)
561	{
562	/* The vendor name. */
563	char szVendor[128];
564	char *pszVendor = &szVendor[0];
565	CFTypeRef ValueRef = CFDictionaryGetValue(DevCharRef, CFSTR(kIOPropertyVendorNameKey));
566	if ( ValueRef
567	&& CFGetTypeID(ValueRef) == CFStringGetTypeID()
568	&& CFStringGetCString((CFStringRef)ValueRef, szVendor, sizeof(szVendor), kCFStringEncodingUTF8))
569	pszVendor = RTStrStrip(szVendor);
570	else
571	*pszVendor = '\0';
572
573	/* The product name. */
574	char szProduct[128];
575	char *pszProduct = &szProduct[0];
576	ValueRef = CFDictionaryGetValue(DevCharRef, CFSTR(kIOPropertyProductNameKey));
577	if ( ValueRef
578	&& CFGetTypeID(ValueRef) == CFStringGetTypeID()
579	&& CFStringGetCString((CFStringRef)ValueRef, szProduct, sizeof(szProduct), kCFStringEncodingUTF8))
580	pszProduct = RTStrStrip(szProduct);
581	else
582	*pszProduct = '\0';
583
584	/* Construct the two names and compare thwm with the one we're searching for. */
585	char szName1[256 + 32];
586	char szName2[256 + 32];
587	if (pszVendor \|\| pszProduct)
588	{
589	if (pszVendor && pszProduct)
590	{
591	RTStrPrintf(szName1, sizeof(szName1), "%s %s", pszVendor, pszProduct);
592	RTStrPrintf(szName2, sizeof(szName2), "%s %s (#%u)", pszVendor, pszProduct, i);
593	}
594	else
595	{
596	strcpy(szName1, *pszVendor ? pszVendor : pszProduct);
597	RTStrPrintf(szName2, sizeof(szName2), "%s (#%u)", *pszVendor ? pszVendor : pszProduct, i);
598	}
599	}
600	else
601	{
602	RTStrPrintf(szName1, sizeof(szName1), "(#%u)", i);
603	strcpy(szName2, szName1);
604	}
605
606	if ( !strcmp(szName1, pThis->pszDevice)
607	\|\| !strcmp(szName2, pThis->pszDevice))
608	{
609	/*
610	* Found it! Now, get the client interface and stuff.
611	* Note that we could also query kIOSCSITaskDeviceUserClientTypeID here if the
612	* MMC client plugin is missing. For now we assume this won't be necessary.
613	*/
614	SInt32 Score = 0;
615	IOCFPlugInInterface **ppPlugInInterface = NULL;
616	krc = IOCreatePlugInInterfaceForService(DVDService, kIOMMCDeviceUserClientTypeID, kIOCFPlugInInterfaceID,
617	&ppPlugInInterface, &Score);
618	if (krc == KERN_SUCCESS)
619	{
620	HRESULT hrc = (*ppPlugInInterface)->QueryInterface(ppPlugInInterface,
621	CFUUIDGetUUIDBytes(kIOMMCDeviceInterfaceID),
622	(LPVOID *)&pThis->Os.ppMMCDI);
623	(*ppPlugInInterface)->Release(ppPlugInInterface);
624	ppPlugInInterface = NULL;
625	if (hrc == S_OK)
626	{
627	pThis->Os.ppScsiTaskDI = (*pThis->Os.ppMMCDI)->GetSCSITaskDeviceInterface(pThis->Os.ppMMCDI);
628	if (pThis->Os.ppScsiTaskDI)
629	rc = VINF_SUCCESS;
630	else
631	{
632	LogRel(("GetSCSITaskDeviceInterface failed on '%s'\n", pThis->pszDevice));
633	rc = VERR_NOT_SUPPORTED;
634	(*pThis->Os.ppMMCDI)->Release(pThis->Os.ppMMCDI);
635	}
636	}
637	else
638	{
639	rc = VERR_GENERAL_FAILURE;//RTErrConvertFromDarwinCOM(krc);
640	pThis->Os.ppMMCDI = NULL;
641	}
642	}
643	else /* Check for kIOSCSITaskDeviceUserClientTypeID? */
644	rc = VERR_GENERAL_FAILURE;//RTErrConvertFromDarwinKern(krc);
645
646	/* Obtain exclusive access to the device so we can send SCSI commands. */
647	if (RT_SUCCESS(rc))
648	rc = drvHostBaseObtainExclusiveAccess(pThis, DVDService);
649
650	/* Cleanup on failure. */
651	if (RT_FAILURE(rc))
652	{
653	if (pThis->Os.ppScsiTaskDI)
654	{
655	(*pThis->Os.ppScsiTaskDI)->Release(pThis->Os.ppScsiTaskDI);
656	pThis->Os.ppScsiTaskDI = NULL;
657	}
658	if (pThis->Os.ppMMCDI)
659	{
660	(*pThis->Os.ppMMCDI)->Release(pThis->Os.ppMMCDI);
661	pThis->Os.ppMMCDI = NULL;
662	}
663	}
664
665	IOObjectRelease(DVDService);
666	break;
667	}
668	}
669	CFRelease(PropsRef);
670	}
671	else
672	AssertMsgFailed(("krc=%#x\n", krc));
673
674	IOObjectRelease(DVDService);
675	i++;
676	}
677
678	IOObjectRelease(DVDServices);
679	return rc;
680
681	}
682
683
684	DECLHIDDEN(int) drvHostBaseMediaRefreshOs(PDRVHOSTBASE pThis)
685	{
686	RT_NOREF(pThis);
687	return VINF_SUCCESS;
688	}
689
690
691	DECLHIDDEN(bool) drvHostBaseIsMediaPollingRequiredOs(PDRVHOSTBASE pThis)
692	{
693	if (pThis->enmType == PDMMEDIATYPE_CDROM \|\| pThis->enmType == PDMMEDIATYPE_DVD)
694	return true;
695
696	AssertMsgFailed(("Darwin supports only CD/DVD host drive access\n"));
697	return false;
698	}
699
700
701	DECLHIDDEN(void) drvHostBaseDestructOs(PDRVHOSTBASE pThis)
702	{
703	/*
704	* Unlock the drive if we've locked it or we're in passthru mode.
705	*/
706	if ( ( pThis->fLocked
707	\|\| pThis->IMedia.pfnSendCmd)
708	&& pThis->Os.ppScsiTaskDI
709	&& pThis->pfnDoLock)
710	{
711	int rc = pThis->pfnDoLock(pThis, false);
712	if (RT_SUCCESS(rc))
713	pThis->fLocked = false;
714	}
715
716	/*
717	* The unclaiming doesn't seem to mean much, the DVD is actually
718	* remounted when we release exclusive access. I'm not quite sure
719	* if I should put the unclaim first or not...
720	*
721	* Anyway, that it's automatically remounted very good news for us,
722	* because that means we don't have to mess with that ourselves. Of
723	* course there is the unlikely scenario that we've succeeded in claiming
724	* and umount the DVD but somehow failed to gain exclusive scsi access...
725	*/
726	if (pThis->Os.ppScsiTaskDI)
727	{
728	LogFlow(("%s-%d: releasing exclusive scsi access!\n", pThis->pDrvIns->pReg->szName, pThis->pDrvIns->iInstance));
729	(*pThis->Os.ppScsiTaskDI)->ReleaseExclusiveAccess(pThis->Os.ppScsiTaskDI);
730	(*pThis->Os.ppScsiTaskDI)->Release(pThis->Os.ppScsiTaskDI);
731	pThis->Os.ppScsiTaskDI = NULL;
732	}
733	if (pThis->Os.pDADisk)
734	{
735	LogFlow(("%s-%d: unclaiming the disk!\n", pThis->pDrvIns->pReg->szName, pThis->pDrvIns->iInstance));
736	DADiskUnclaim(pThis->Os.pDADisk);
737	CFRelease(pThis->Os.pDADisk);
738	pThis->Os.pDADisk = NULL;
739	}
740	if (pThis->Os.ppMMCDI)
741	{
742	LogFlow(("%s-%d: releasing the MMC object!\n", pThis->pDrvIns->pReg->szName, pThis->pDrvIns->iInstance));
743	(*pThis->Os.ppMMCDI)->Release(pThis->Os.ppMMCDI);
744	pThis->Os.ppMMCDI = NULL;
745	}
746	if (pThis->Os.MasterPort != IO_OBJECT_NULL)
747	{
748	mach_port_deallocate(mach_task_self(), pThis->Os.MasterPort);
749	pThis->Os.MasterPort = IO_OBJECT_NULL;
750	}
751	if (pThis->Os.pDASession)
752	{
753	LogFlow(("%s-%d: releasing the DA session!\n", pThis->pDrvIns->pReg->szName, pThis->pDrvIns->iInstance));
754	CFRelease(pThis->Os.pDASession);
755	pThis->Os.pDASession = NULL;
756	}
757	}
758

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source: vbox/trunk/src/VBox/Devices/Storage/DrvHostBase-darwin.cpp@ 92197

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