DrvDiskIntegrity.cpp@ 71564

Last change on this file since 71564 was 69500, checked in by vboxsync, 7 years ago
*: scm --update-copyright-year
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 68.4 KB

Line
1	/* $Id: DrvDiskIntegrity.cpp 69500 2017-10-28 15:14:05Z vboxsync $ */
2	/** @file
3	* VBox storage devices: Disk integrity check.
4	*/
5
6	/*
7	* Copyright (C) 2006-2017 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_DISK_INTEGRITY
23	#include <VBox/vmm/pdmdrv.h>
24	#include <VBox/vmm/pdmstorageifs.h>
25	#include <VBox/vddbg.h>
26	#include <iprt/assert.h>
27	#include <iprt/string.h>
28	#include <iprt/uuid.h>
29	#include <iprt/avl.h>
30	#include <iprt/mem.h>
31	#include <iprt/memcache.h>
32	#include <iprt/message.h>
33	#include <iprt/sg.h>
34	#include <iprt/time.h>
35	#include <iprt/semaphore.h>
36	#include <iprt/asm.h>
37
38	#include "VBoxDD.h"
39
40
41	/*********************************************************************************************************************************
42	* Structures and Typedefs *
43	*********************************************************************************************************************************/
44
45	/**
46	* Transfer direction.
47	*/
48	typedef enum DRVDISKAIOTXDIR
49	{
50	/** Invalid. */
51	DRVDISKAIOTXDIR_INVALID = 0,
52	/** Read */
53	DRVDISKAIOTXDIR_READ,
54	/** Write */
55	DRVDISKAIOTXDIR_WRITE,
56	/** Flush */
57	DRVDISKAIOTXDIR_FLUSH,
58	/** Discard */
59	DRVDISKAIOTXDIR_DISCARD,
60	/** Read after write for immediate verification. */
61	DRVDISKAIOTXDIR_READ_AFTER_WRITE
62	} DRVDISKAIOTXDIR;
63
64	/**
65	* async I/O request.
66	*/
67	typedef struct DRVDISKAIOREQ
68	{
69	/** Transfer direction. */
70	DRVDISKAIOTXDIR enmTxDir;
71	/** Start offset. */
72	uint64_t off;
73	/** Transfer size. */
74	size_t cbTransfer;
75	/** Segment array. */
76	PCRTSGSEG paSeg;
77	/** Number of array entries. */
78	unsigned cSeg;
79	/** User argument */
80	void *pvUser;
81	/** Slot in the array. */
82	unsigned iSlot;
83	/** Start timestamp */
84	uint64_t tsStart;
85	/** Completion timestamp. */
86	uint64_t tsComplete;
87	/** I/O log entry if configured. */
88	VDIOLOGENT hIoLogEntry;
89	/** Ranges to discard. */
90	PCRTRANGE paRanges;
91	/** Number of ranges. */
92	unsigned cRanges;
93	/** I/O segment for the extended media interface
94	* to hold the data. */
95	RTSGSEG IoSeg;
96	} DRVDISKAIOREQ, *PDRVDISKAIOREQ;
97
98	/**
99	* I/O log entry.
100	*/
101	typedef struct IOLOGENT
102	{
103	/** Start offset */
104	uint64_t off;
105	/** Write size */
106	size_t cbWrite;
107	/** Number of references to this entry. */
108	unsigned cRefs;
109	} IOLOGENT, *PIOLOGENT;
110
111	/**
112	* Disk segment.
113	*/
114	typedef struct DRVDISKSEGMENT
115	{
116	/** AVL core. */
117	AVLRFOFFNODECORE Core;
118	/** Size of the segment */
119	size_t cbSeg;
120	/** Data for this segment */
121	uint8_t *pbSeg;
122	/** Number of entries in the I/O array. */
123	unsigned cIoLogEntries;
124	/** Array of I/O log references. */
125	PIOLOGENT apIoLog[1];
126	} DRVDISKSEGMENT, *PDRVDISKSEGMENT;
127
128	/**
129	* Active requests list entry.
130	*/
131	typedef struct DRVDISKAIOREQACTIVE
132	{
133	/** Pointer to the request. */
134	volatile PDRVDISKAIOREQ pIoReq;
135	/** Start timestamp. */
136	uint64_t tsStart;
137	} DRVDISKAIOREQACTIVE, *PDRVDISKAIOREQACTIVE;
138
139	/**
140	* Disk integrity driver instance data.
141	*
142	* @implements PDMIMEDIA
143	*/
144	typedef struct DRVDISKINTEGRITY
145	{
146	/** Pointer driver instance. */
147	PPDMDRVINS pDrvIns;
148	/** Pointer to the media driver below us.
149	* This is NULL if the media is not mounted. */
150	PPDMIMEDIA pDrvMedia;
151	/** Our media interface */
152	PDMIMEDIA IMedia;
153
154	/** The media port interface above. */
155	PPDMIMEDIAPORT pDrvMediaPort;
156	/** Media port interface */
157	PDMIMEDIAPORT IMediaPort;
158
159	/** The extended media port interface above. */
160	PPDMIMEDIAEXPORT pDrvMediaExPort;
161	/** Our extended media port interface */
162	PDMIMEDIAEXPORT IMediaExPort;
163
164	/** The extended media interface below. */
165	PPDMIMEDIAEX pDrvMediaEx;
166	/** Our extended media interface */
167	PDMIMEDIAEX IMediaEx;
168
169	/** Flag whether consistency checks are enabled. */
170	bool fCheckConsistency;
171	/** Flag whether the RAM disk was prepopulated. */
172	bool fPrepopulateRamDisk;
173	/** AVL tree containing the disk blocks to check. */
174	PAVLRFOFFTREE pTreeSegments;
175
176	/** Flag whether async request tracing is enabled. */
177	bool fTraceRequests;
178	/** Interval the thread should check for expired requests (milliseconds). */
179	uint32_t uCheckIntervalMs;
180	/** Expire timeout for a request (milliseconds). */
181	uint32_t uExpireIntervalMs;
182	/** Thread which checks for lost requests. */
183	RTTHREAD hThread;
184	/** Event semaphore */
185	RTSEMEVENT SemEvent;
186	/** Flag whether the thread should run. */
187	bool fRunning;
188	/** Array containing active requests. */
189	DRVDISKAIOREQACTIVE apReqActive[128];
190	/** Next free slot in the array */
191	volatile unsigned iNextFreeSlot;
192	/** Request cache. */
193	RTMEMCACHE hReqCache;
194
195	/** Flag whether we check for requests completing twice. */
196	bool fCheckDoubleCompletion;
197	/** Number of requests we go back. */
198	unsigned cEntries;
199	/** Array of completed but still observed requests. */
200	PDRVDISKAIOREQ *papIoReq;
201	/** Current entry in the array. */
202	unsigned iEntry;
203
204	/** Flag whether to do a immediate read after write for verification. */
205	bool fReadAfterWrite;
206	/** Flag whether to record the data to write before the write completed successfully.
207	* Useful in case the data is modified in place later on (encryption for instance). */
208	bool fRecordWriteBeforeCompletion;
209	/** Flag whether to validate memory buffers when the extended media interface is used. */
210	bool fValidateMemBufs;
211
212	/** I/O logger to use if enabled. */
213	VDIOLOGGER hIoLogger;
214	/** Size of the opaque handle until our tracking structure starts in bytes. */
215	size_t cbIoReqOpaque;
216	} DRVDISKINTEGRITY, *PDRVDISKINTEGRITY;
217
218
219	#define DISKINTEGRITY_IOREQ_HANDLE_2_DRVDISKAIOREQ(a_pThis, a_hIoReq) (((PDRVDISKAIOREQ )((uintptr_t)(a_hIoReq) + (a_pThis)->cbIoReqOpaque)))
220	#define DISKINTEGRITY_IOREQ_HANDLE_2_UPPER_OPAQUE(a_pThis, a_hIoReq) ((void *)((uintptr_t)(a_hIoReq) + (a_pThis)->cbIoReqOpaque + sizeof(PDRVDISKAIOREQ)))
221	#define DISKINTEGRITY_IOREQ_ALLOC_2_DRVDISKAIOREQ(a_pvIoReqAlloc) ((PDRVDISKAIOREQ )(a_pvIoReqAlloc))
222	#define DISKINTEGRITY_IOREQ_ALLOC_2_UPPER(a_pvIoReqAlloc) ((void *)((uintptr_t)(a_pvIoReqAlloc) + sizeof(PDRVDISKAIOREQ)))
223
224	static void drvdiskintIoReqCheckForDoubleCompletion(PDRVDISKINTEGRITY pThis, PDRVDISKAIOREQ pIoReq,
225	bool fMediaEx)
226	{
227	/* Search if the I/O request completed already. */
228	for (unsigned i = 0; i < pThis->cEntries; i++)
229	{
230	if (RT_UNLIKELY(pThis->papIoReq[i] == pIoReq))
231	{
232	RTMsgError("Request %#p completed already!\n", pIoReq);
233	if (!fMediaEx)
234	RTMsgError("Start timestamp %llu Completion timestamp %llu (completed after %llu ms)\n",
235	pIoReq->tsStart, pIoReq->tsComplete, pIoReq->tsComplete - pIoReq->tsStart);
236	RTAssertDebugBreak();
237	}
238	}
239
240	pIoReq->tsComplete = RTTimeSystemMilliTS();
241	Assert(!pThis->papIoReq[pThis->iEntry]);
242	pThis->papIoReq[pThis->iEntry] = pIoReq;
243
244	pThis->iEntry = (pThis->iEntry+1) % pThis->cEntries;
245	if (pThis->papIoReq[pThis->iEntry])
246	{
247	if (!fMediaEx)
248	RTMemFree(pThis->papIoReq[pThis->iEntry]);
249	pThis->papIoReq[pThis->iEntry] = NULL;
250	}
251	}
252
253	static void drvdiskintIoLogEntryRelease(PIOLOGENT pIoLogEnt)
254	{
255	pIoLogEnt->cRefs--;
256	if (!pIoLogEnt->cRefs)
257	RTMemFree(pIoLogEnt);
258	}
259
260	/**
261	* Record a successful write to the virtual disk.
262	*
263	* @returns VBox status code.
264	* @param pThis Disk integrity driver instance data.
265	* @param paSeg Segment array of the write to record.
266	* @param cSeg Number of segments.
267	* @param off Start offset.
268	* @param cbWrite Number of bytes to record.
269	*/
270	static int drvdiskintWriteRecord(PDRVDISKINTEGRITY pThis, PCRTSGSEG paSeg, unsigned cSeg,
271	uint64_t off, size_t cbWrite)
272	{
273	int rc = VINF_SUCCESS;
274
275	LogFlowFunc(("pThis=%#p paSeg=%#p cSeg=%u off=%llx cbWrite=%u\n",
276	pThis, paSeg, cSeg, off, cbWrite));
277
278	/* Update the segments */
279	size_t cbLeft = cbWrite;
280	RTFOFF offCurr = (RTFOFF)off;
281	RTSGBUF SgBuf;
282	PIOLOGENT pIoLogEnt = (PIOLOGENT)RTMemAllocZ(sizeof(IOLOGENT));
283	if (!pIoLogEnt)
284	return VERR_NO_MEMORY;
285
286	pIoLogEnt->off = off;
287	pIoLogEnt->cbWrite = cbWrite;
288	pIoLogEnt->cRefs = 0;
289
290	RTSgBufInit(&SgBuf, paSeg, cSeg);
291
292	while (cbLeft)
293	{
294	PDRVDISKSEGMENT pSeg = (PDRVDISKSEGMENT)RTAvlrFileOffsetRangeGet(pThis->pTreeSegments, offCurr);
295	size_t cbRange = 0;
296	bool fSet = false;
297	unsigned offSeg = 0;
298
299	if (!pSeg)
300	{
301	/* Get next segment */
302	pSeg = (PDRVDISKSEGMENT)RTAvlrFileOffsetGetBestFit(pThis->pTreeSegments, offCurr, true);
303	if ( !pSeg
304	\|\| offCurr + (RTFOFF)cbLeft <= pSeg->Core.Key)
305	cbRange = cbLeft;
306	else
307	cbRange = pSeg->Core.Key - offCurr;
308
309	Assert(cbRange % 512 == 0);
310
311	/* Create new segment */
312	pSeg = (PDRVDISKSEGMENT)RTMemAllocZ(RT_OFFSETOF(DRVDISKSEGMENT, apIoLog[cbRange / 512]));
313	if (pSeg)
314	{
315	pSeg->Core.Key = offCurr;
316	pSeg->Core.KeyLast = offCurr + (RTFOFF)cbRange - 1;
317	pSeg->cbSeg = cbRange;
318	pSeg->pbSeg = (uint8_t *)RTMemAllocZ(cbRange);
319	pSeg->cIoLogEntries = (uint32_t)cbRange / 512;
320	if (!pSeg->pbSeg)
321	RTMemFree(pSeg);
322	else
323	{
324	bool fInserted = RTAvlrFileOffsetInsert(pThis->pTreeSegments, &pSeg->Core);
325	AssertMsg(fInserted, ("Bug!\n")); RT_NOREF(fInserted);
326	fSet = true;
327	}
328	}
329	}
330	else
331	{
332	fSet = true;
333	offSeg = offCurr - pSeg->Core.Key;
334	cbRange = RT_MIN(cbLeft, (size_t)(pSeg->Core.KeyLast + 1 - offCurr));
335	}
336
337	if (fSet)
338	{
339	AssertPtr(pSeg);
340	size_t cbCopied = RTSgBufCopyToBuf(&SgBuf, pSeg->pbSeg + offSeg, cbRange);
341	Assert(cbCopied == cbRange); RT_NOREF(cbCopied);
342
343	/* Update the I/O log pointers */
344	Assert(offSeg % 512 == 0);
345	Assert(cbRange % 512 == 0);
346	while (offSeg < cbRange)
347	{
348	uint32_t uSector = offSeg / 512;
349	PIOLOGENT pIoLogOld = NULL;
350
351	AssertMsg(uSector < pSeg->cIoLogEntries, ("Internal bug!\n"));
352
353	pIoLogOld = pSeg->apIoLog[uSector];
354	if (pIoLogOld)
355	{
356	pIoLogOld->cRefs--;
357	if (!pIoLogOld->cRefs)
358	RTMemFree(pIoLogOld);
359	}
360
361	pSeg->apIoLog[uSector] = pIoLogEnt;
362	pIoLogEnt->cRefs++;
363
364	offSeg += 512;
365	}
366	}
367	else
368	RTSgBufAdvance(&SgBuf, cbRange);
369
370	offCurr += cbRange;
371	cbLeft -= cbRange;
372	}
373
374	return rc;
375	}
376
377	/**
378	* Verifies a read request.
379	*
380	* @returns VBox status code.
381	* @param pThis Disk integrity driver instance data.
382	* @param paSeg Segment array of the containing the data buffers to verify.
383	* @param cSeg Number of segments.
384	* @param off Start offset.
385	* @param cbRead Number of bytes to verify.
386	*/
387	static int drvdiskintReadVerify(PDRVDISKINTEGRITY pThis, PCRTSGSEG paSeg, unsigned cSeg,
388	uint64_t off, size_t cbRead)
389	{
390	int rc = VINF_SUCCESS;
391
392	LogFlowFunc(("pThis=%#p paSeg=%#p cSeg=%u off=%llx cbRead=%u\n",
393	pThis, paSeg, cSeg, off, cbRead));
394
395	Assert(off % 512 == 0);
396	Assert(cbRead % 512 == 0);
397
398	/* Compare read data */
399	size_t cbLeft = cbRead;
400	RTFOFF offCurr = (RTFOFF)off;
401	RTSGBUF SgBuf;
402
403	RTSgBufInit(&SgBuf, paSeg, cSeg);
404
405	while (cbLeft)
406	{
407	PDRVDISKSEGMENT pSeg = (PDRVDISKSEGMENT)RTAvlrFileOffsetRangeGet(pThis->pTreeSegments, offCurr);
408	size_t cbRange = 0;
409	bool fCmp = false;
410	unsigned offSeg = 0;
411
412	if (!pSeg)
413	{
414	/* Get next segment */
415	pSeg = (PDRVDISKSEGMENT)RTAvlrFileOffsetGetBestFit(pThis->pTreeSegments, offCurr, true);
416	if (!pSeg)
417	{
418	/* No data in the tree for this read. Assume everything is ok. */
419	cbRange = cbLeft;
420	}
421	else if (offCurr + (RTFOFF)cbLeft <= pSeg->Core.Key)
422	cbRange = cbLeft;
423	else
424	cbRange = pSeg->Core.Key - offCurr;
425
426	if (pThis->fPrepopulateRamDisk)
427	{
428	/* No segment means everything should be 0 for this part. */
429	if (!RTSgBufIsZero(&SgBuf, cbRange))
430	{
431	RTMsgError("Corrupted disk at offset %llu (expected everything to be 0)!\n",
432	offCurr);
433	RTAssertDebugBreak();
434	}
435	}
436	}
437	else
438	{
439	fCmp = true;
440	offSeg = offCurr - pSeg->Core.Key;
441	cbRange = RT_MIN(cbLeft, (size_t)(pSeg->Core.KeyLast + 1 - offCurr));
442	}
443
444	if (fCmp)
445	{
446	RTSGSEG Seg;
447	RTSGBUF SgBufCmp;
448	size_t cbOff = 0;
449
450	Seg.cbSeg = cbRange;
451	Seg.pvSeg = pSeg->pbSeg + offSeg;
452
453	RTSgBufInit(&SgBufCmp, &Seg, 1);
454	if (RTSgBufCmpEx(&SgBuf, &SgBufCmp, cbRange, &cbOff, true))
455	{
456	/* Corrupted disk, print I/O log entry of the last write which accessed this range. */
457	uint32_t cSector = (offSeg + (uint32_t)cbOff) / 512;
458	AssertMsg(cSector < pSeg->cIoLogEntries, ("Internal bug!\n"));
459
460	RTMsgError("Corrupted disk at offset %llu (%u bytes in the current read buffer)!\n",
461	offCurr + cbOff, cbOff);
462	RTMsgError("Last write to this sector started at offset %llu with %u bytes (%u references to this log entry)\n",
463	pSeg->apIoLog[cSector]->off,
464	pSeg->apIoLog[cSector]->cbWrite,
465	pSeg->apIoLog[cSector]->cRefs);
466	RTAssertDebugBreak();
467	}
468	}
469	else
470	RTSgBufAdvance(&SgBuf, cbRange);
471
472	offCurr += cbRange;
473	cbLeft -= cbRange;
474	}
475
476	return rc;
477	}
478
479	/**
480	* Discards the given ranges from the disk.
481	*
482	* @returns VBox status code.
483	* @param pThis Disk integrity driver instance data.
484	* @param paRanges Array of ranges to discard.
485	* @param cRanges Number of ranges in the array.
486	*/
487	static int drvdiskintDiscardRecords(PDRVDISKINTEGRITY pThis, PCRTRANGE paRanges, unsigned cRanges)
488	{
489	int rc = VINF_SUCCESS;
490
491	LogFlowFunc(("pThis=%#p paRanges=%#p cRanges=%u\n", pThis, paRanges, cRanges));
492
493	for (unsigned i = 0; i < cRanges; i++)
494	{
495	uint64_t offStart = paRanges[i].offStart;
496	size_t cbLeft = paRanges[i].cbRange;
497
498	LogFlowFunc(("Discarding off=%llu cbRange=%zu\n", offStart, cbLeft));
499
500	while (cbLeft)
501	{
502	size_t cbRange;
503	PDRVDISKSEGMENT pSeg = (PDRVDISKSEGMENT)RTAvlrFileOffsetRangeGet(pThis->pTreeSegments, offStart);
504
505	if (!pSeg)
506	{
507	/* Get next segment */
508	pSeg = (PDRVDISKSEGMENT)RTAvlrFileOffsetGetBestFit(pThis->pTreeSegments, offStart, true);
509	if ( !pSeg
510	\|\| (RTFOFF)offStart + (RTFOFF)cbLeft <= pSeg->Core.Key)
511	cbRange = cbLeft;
512	else
513	cbRange = pSeg->Core.Key - offStart;
514
515	Assert(!(cbRange % 512));
516	}
517	else
518	{
519	size_t cbPreLeft, cbPostLeft;
520
521	cbRange = RT_MIN(cbLeft, pSeg->Core.KeyLast - offStart + 1);
522	cbPreLeft = offStart - pSeg->Core.Key;
523	cbPostLeft = pSeg->cbSeg - cbRange - cbPreLeft;
524
525	Assert(!(cbRange % 512));
526	Assert(!(cbPreLeft % 512));
527	Assert(!(cbPostLeft % 512));
528
529	LogFlowFunc(("cbRange=%zu cbPreLeft=%zu cbPostLeft=%zu\n",
530	cbRange, cbPreLeft, cbPostLeft));
531
532	RTAvlrFileOffsetRemove(pThis->pTreeSegments, pSeg->Core.Key);
533
534	if (!cbPreLeft && !cbPostLeft)
535	{
536	/* Just free the whole segment. */
537	LogFlowFunc(("Freeing whole segment pSeg=%#p\n", pSeg));
538	RTMemFree(pSeg->pbSeg);
539	for (unsigned idx = 0; idx < pSeg->cIoLogEntries; idx++)
540	drvdiskintIoLogEntryRelease(pSeg->apIoLog[idx]);
541	RTMemFree(pSeg);
542	}
543	else if (cbPreLeft && !cbPostLeft)
544	{
545	/* Realloc to new size and insert. */
546	LogFlowFunc(("Realloc segment pSeg=%#p\n", pSeg));
547	pSeg->pbSeg = (uint8_t *)RTMemRealloc(pSeg->pbSeg, cbPreLeft);
548	for (unsigned idx = (uint32_t)(cbPreLeft / 512); idx < pSeg->cIoLogEntries; idx++)
549	drvdiskintIoLogEntryRelease(pSeg->apIoLog[idx]);
550	pSeg = (PDRVDISKSEGMENT)RTMemRealloc(pSeg, RT_OFFSETOF(DRVDISKSEGMENT, apIoLog[cbPreLeft / 512]));
551	pSeg->Core.KeyLast = pSeg->Core.Key + cbPreLeft - 1;
552	pSeg->cbSeg = cbPreLeft;
553	pSeg->cIoLogEntries = (uint32_t)(cbPreLeft / 512);
554	bool fInserted = RTAvlrFileOffsetInsert(pThis->pTreeSegments, &pSeg->Core);
555	Assert(fInserted); RT_NOREF(fInserted);
556	}
557	else if (!cbPreLeft && cbPostLeft)
558	{
559	/* Move data to the front and realloc. */
560	LogFlowFunc(("Move data and realloc segment pSeg=%#p\n", pSeg));
561	memmove(pSeg->pbSeg, pSeg->pbSeg + cbRange, cbPostLeft);
562	for (unsigned idx = 0; idx < cbRange / 512; idx++)
563	drvdiskintIoLogEntryRelease(pSeg->apIoLog[idx]);
564	for (unsigned idx = 0; idx < cbPostLeft /512; idx++)
565	pSeg->apIoLog[idx] = pSeg->apIoLog[(cbRange / 512) + idx];
566	pSeg = (PDRVDISKSEGMENT)RTMemRealloc(pSeg, RT_OFFSETOF(DRVDISKSEGMENT, apIoLog[cbPostLeft / 512]));
567	pSeg->pbSeg = (uint8_t *)RTMemRealloc(pSeg->pbSeg, cbPostLeft);
568	pSeg->Core.Key += cbRange;
569	pSeg->cbSeg = cbPostLeft;
570	pSeg->cIoLogEntries = (uint32_t)(cbPostLeft / 512);
571	bool fInserted = RTAvlrFileOffsetInsert(pThis->pTreeSegments, &pSeg->Core);
572	Assert(fInserted); RT_NOREF(fInserted);
573	}
574	else
575	{
576	/* Split the segment into 2 new segments. */
577	LogFlowFunc(("Split segment pSeg=%#p\n", pSeg));
578	PDRVDISKSEGMENT pSegPost = (PDRVDISKSEGMENT)RTMemAllocZ(RT_OFFSETOF(DRVDISKSEGMENT, apIoLog[cbPostLeft / 512]));
579	if (pSegPost)
580	{
581	pSegPost->Core.Key = pSeg->Core.Key + cbPreLeft + cbRange;
582	pSegPost->Core.KeyLast = pSeg->Core.KeyLast;
583	pSegPost->cbSeg = cbPostLeft;
584	pSegPost->pbSeg = (uint8_t *)RTMemAllocZ(cbPostLeft);
585	pSegPost->cIoLogEntries = (uint32_t)(cbPostLeft / 512);
586	if (!pSegPost->pbSeg)
587	RTMemFree(pSegPost);
588	else
589	{
590	memcpy(pSegPost->pbSeg, pSeg->pbSeg + cbPreLeft + cbRange, cbPostLeft);
591	for (unsigned idx = 0; idx < (uint32_t)(cbPostLeft / 512); idx++)
592	pSegPost->apIoLog[idx] = pSeg->apIoLog[((cbPreLeft + cbRange) / 512) + idx];
593
594	bool fInserted = RTAvlrFileOffsetInsert(pThis->pTreeSegments, &pSegPost->Core);
595	Assert(fInserted); RT_NOREF(fInserted);
596	}
597	}
598
599	/* Shrink the current segment. */
600	pSeg->pbSeg = (uint8_t *)RTMemRealloc(pSeg->pbSeg, cbPreLeft);
601	for (unsigned idx = (uint32_t)(cbPreLeft / 512); idx < (uint32_t)((cbPreLeft + cbRange) / 512); idx++)
602	drvdiskintIoLogEntryRelease(pSeg->apIoLog[idx]);
603	pSeg = (PDRVDISKSEGMENT)RTMemRealloc(pSeg, RT_OFFSETOF(DRVDISKSEGMENT, apIoLog[cbPreLeft / 512]));
604	pSeg->Core.KeyLast = pSeg->Core.Key + cbPreLeft - 1;
605	pSeg->cbSeg = cbPreLeft;
606	pSeg->cIoLogEntries = (uint32_t)(cbPreLeft / 512);
607	bool fInserted = RTAvlrFileOffsetInsert(pThis->pTreeSegments, &pSeg->Core);
608	Assert(fInserted); RT_NOREF(fInserted);
609	} /* if (cbPreLeft && cbPostLeft) */
610	}
611
612	offStart += cbRange;
613	cbLeft -= cbRange;
614	}
615	}
616
617	LogFlowFunc(("returns rc=%Rrc\n", rc));
618	return rc;
619	}
620
621	/**
622	* Adds a request to the active list.
623	*
624	* @returns nothing.
625	* @param pThis The driver instance data.
626	* @param pIoReq The request to add.
627	*/
628	static void drvdiskintIoReqAdd(PDRVDISKINTEGRITY pThis, PDRVDISKAIOREQ pIoReq)
629	{
630	PDRVDISKAIOREQACTIVE pReqActive = &pThis->apReqActive[pThis->iNextFreeSlot];
631
632	Assert(!pReqActive->pIoReq);
633	pReqActive->tsStart = pIoReq->tsStart;
634	pReqActive->pIoReq = pIoReq;
635	pIoReq->iSlot = pThis->iNextFreeSlot;
636
637	/* Search for the next one. */
638	while (pThis->apReqActive[pThis->iNextFreeSlot].pIoReq)
639	pThis->iNextFreeSlot = (pThis->iNextFreeSlot+1) % RT_ELEMENTS(pThis->apReqActive);
640	}
641
642	/**
643	* Removes a request from the active list.
644	*
645	* @returns nothing.
646	* @param pThis The driver instance data.
647	* @param pIoReq The request to remove.
648	*/
649	static void drvdiskintIoReqRemove(PDRVDISKINTEGRITY pThis, PDRVDISKAIOREQ pIoReq)
650	{
651	PDRVDISKAIOREQACTIVE pReqActive = &pThis->apReqActive[pIoReq->iSlot];
652
653	Assert(pReqActive->pIoReq == pIoReq);
654
655	ASMAtomicWriteNullPtr(&pReqActive->pIoReq);
656	}
657
658	/**
659	* Thread checking for expired requests.
660	*
661	* @returns IPRT status code.
662	* @param pThread Thread handle.
663	* @param pvUser Opaque user data.
664	*/
665	static DECLCALLBACK(int) drvdiskIntIoReqExpiredCheck(RTTHREAD pThread, void *pvUser)
666	{
667	PDRVDISKINTEGRITY pThis = (PDRVDISKINTEGRITY)pvUser;
668
669	RT_NOREF(pThread);
670
671	while (pThis->fRunning)
672	{
673	int rc = RTSemEventWait(pThis->SemEvent, pThis->uCheckIntervalMs);
674
675	if (!pThis->fRunning)
676	break;
677
678	Assert(rc == VERR_TIMEOUT); RT_NOREF(rc);
679
680	/* Get current timestamp for comparison. */
681	uint64_t tsCurr = RTTimeSystemMilliTS();
682
683	/* Go through the array and check for expired requests. */
684	for (unsigned i = 0; i < RT_ELEMENTS(pThis->apReqActive); i++)
685	{
686	PDRVDISKAIOREQACTIVE pReqActive = &pThis->apReqActive[i];
687	PDRVDISKAIOREQ pIoReq = ASMAtomicReadPtrT(&pReqActive->pIoReq, PDRVDISKAIOREQ);
688
689	if ( pIoReq
690	&& (tsCurr > pReqActive->tsStart)
691	&& (tsCurr - pReqActive->tsStart) >= pThis->uExpireIntervalMs)
692	{
693	RTMsgError("Request %#p expired (active for %llu ms already)\n",
694	pIoReq, tsCurr - pReqActive->tsStart);
695	RTAssertDebugBreak();
696	}
697	}
698	}
699
700	return VINF_SUCCESS;
701	}
702
703	/**
704	* Verify a completed read after write request.
705	*
706	* @returns VBox status code.
707	* @param pThis The driver instance data.
708	* @param pIoReq The request to be verified.
709	*/
710	static int drvdiskintReadAfterWriteVerify(PDRVDISKINTEGRITY pThis, PDRVDISKAIOREQ pIoReq)
711	{
712	int rc = VINF_SUCCESS;
713
714	if (pThis->fCheckConsistency)
715	rc = drvdiskintReadVerify(pThis, pIoReq->paSeg, pIoReq->cSeg, pIoReq->off, pIoReq->cbTransfer);
716	else /** @todo Implement read after write verification without a memory based image of the disk. */
717	AssertMsgFailed(("TODO\n"));
718
719	return rc;
720	}
721
722	/* -=-=-=-=- IMedia -=-=-=-=- */
723
724	/** Makes a PDRVDISKINTEGRITY out of a PPDMIMEDIA. */
725	#define PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface) ( (PDRVDISKINTEGRITY)((uintptr_t)pInterface - RT_OFFSETOF(DRVDISKINTEGRITY, IMedia)) )
726
727
728	/*********************************************************************************************************************************
729	* Media interface methods *
730	*********************************************************************************************************************************/
731
732	/** @interface_method_impl{PDMIMEDIA,pfnRead} */
733	static DECLCALLBACK(int) drvdiskintRead(PPDMIMEDIA pInterface,
734	uint64_t off, void *pvBuf, size_t cbRead)
735	{
736	int rc = VINF_SUCCESS;
737	VDIOLOGENT hIoLogEntry = NULL;
738	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
739
740	if (pThis->hIoLogger)
741	{
742	rc = VDDbgIoLogStart(pThis->hIoLogger, false, VDDBGIOLOGREQ_READ, off,
743	cbRead, NULL, &hIoLogEntry);
744	AssertRC(rc);
745	}
746
747	rc = pThis->pDrvMedia->pfnRead(pThis->pDrvMedia, off, pvBuf, cbRead);
748
749	if (pThis->hIoLogger)
750	{
751	RTSGSEG Seg;
752	RTSGBUF SgBuf;
753
754	Seg.pvSeg = pvBuf;
755	Seg.cbSeg = cbRead;
756	RTSgBufInit(&SgBuf, &Seg, 1);
757
758	int rc2 = VDDbgIoLogComplete(pThis->hIoLogger, hIoLogEntry, rc, &SgBuf);
759	AssertRC(rc2);
760	}
761
762	if (RT_FAILURE(rc))
763	return rc;
764
765	if (pThis->fCheckConsistency)
766	{
767	/* Verify the read. */
768	RTSGSEG Seg;
769	Seg.cbSeg = cbRead;
770	Seg.pvSeg = pvBuf;
771	rc = drvdiskintReadVerify(pThis, &Seg, 1, off, cbRead);
772	}
773
774	return rc;
775	}
776
777	/** @interface_method_impl{PDMIMEDIA,pfnWrite} */
778	static DECLCALLBACK(int) drvdiskintWrite(PPDMIMEDIA pInterface,
779	uint64_t off, const void *pvBuf,
780	size_t cbWrite)
781	{
782	int rc = VINF_SUCCESS;
783	VDIOLOGENT hIoLogEntry = NULL;
784	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
785
786	if (pThis->hIoLogger)
787	{
788	RTSGSEG Seg;
789	RTSGBUF SgBuf;
790
791	Seg.pvSeg = (void *)pvBuf;
792	Seg.cbSeg = cbWrite;
793	RTSgBufInit(&SgBuf, &Seg, 1);
794
795	rc = VDDbgIoLogStart(pThis->hIoLogger, false, VDDBGIOLOGREQ_WRITE, off,
796	cbWrite, &SgBuf, &hIoLogEntry);
797	AssertRC(rc);
798	}
799
800	if (pThis->fRecordWriteBeforeCompletion)
801	{
802	RTSGSEG Seg;
803	Seg.cbSeg = cbWrite;
804	Seg.pvSeg = (void *)pvBuf;
805
806	rc = drvdiskintWriteRecord(pThis, &Seg, 1, off, cbWrite);
807	if (RT_FAILURE(rc))
808	return rc;
809	}
810
811	rc = pThis->pDrvMedia->pfnWrite(pThis->pDrvMedia, off, pvBuf, cbWrite);
812
813	if (pThis->hIoLogger)
814	{
815	int rc2 = VDDbgIoLogComplete(pThis->hIoLogger, hIoLogEntry, rc, NULL);
816	AssertRC(rc2);
817	}
818
819	if (RT_FAILURE(rc))
820	return rc;
821
822	if ( pThis->fCheckConsistency
823	&& !pThis->fRecordWriteBeforeCompletion)
824	{
825	/* Record the write. */
826	RTSGSEG Seg;
827	Seg.cbSeg = cbWrite;
828	Seg.pvSeg = (void *)pvBuf;
829	rc = drvdiskintWriteRecord(pThis, &Seg, 1, off, cbWrite);
830	}
831
832	return rc;
833	}
834
835	/** @interface_method_impl{PDMIMEDIA,pfnFlush} */
836	static DECLCALLBACK(int) drvdiskintFlush(PPDMIMEDIA pInterface)
837	{
838	int rc = VINF_SUCCESS;
839	VDIOLOGENT hIoLogEntry = NULL;
840	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
841
842	if (pThis->hIoLogger)
843	{
844	rc = VDDbgIoLogStart(pThis->hIoLogger, false, VDDBGIOLOGREQ_FLUSH, 0,
845	0, NULL, &hIoLogEntry);
846	AssertRC(rc);
847	}
848
849	rc = pThis->pDrvMedia->pfnFlush(pThis->pDrvMedia);
850
851	if (pThis->hIoLogger)
852	{
853	int rc2 = VDDbgIoLogComplete(pThis->hIoLogger, hIoLogEntry, rc, NULL);
854	AssertRC(rc2);
855	}
856
857	return rc;
858	}
859
860	/** @interface_method_impl{PDMIMEDIA,pfnGetSize} */
861	static DECLCALLBACK(uint64_t) drvdiskintGetSize(PPDMIMEDIA pInterface)
862	{
863	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
864	return pThis->pDrvMedia->pfnGetSize(pThis->pDrvMedia);
865	}
866
867	/** @interface_method_impl{PDMIMEDIA,pfnIsReadOnly} */
868	static DECLCALLBACK(bool) drvdiskintIsReadOnly(PPDMIMEDIA pInterface)
869	{
870	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
871	return pThis->pDrvMedia->pfnIsReadOnly(pThis->pDrvMedia);
872	}
873
874	/** @interface_method_impl{PDMIMEDIA,pfnBiosIsVisible} */
875	static DECLCALLBACK(bool) drvdiskintBiosIsVisible(PPDMIMEDIA pInterface)
876	{
877	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
878	return pThis->pDrvMedia->pfnBiosIsVisible(pThis->pDrvMedia);
879	}
880
881	/** @interface_method_impl{PDMIMEDIA,pfnGetType} */
882	static DECLCALLBACK(PDMMEDIATYPE) drvdiskintGetType(PPDMIMEDIA pInterface)
883	{
884	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
885	return pThis->pDrvMedia->pfnGetType(pThis->pDrvMedia);
886	}
887
888	/** @interface_method_impl{PDMIMEDIA,pfnBiosGetPCHSGeometry} */
889	static DECLCALLBACK(int) drvdiskintBiosGetPCHSGeometry(PPDMIMEDIA pInterface,
890	PPDMMEDIAGEOMETRY pPCHSGeometry)
891	{
892	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
893	return pThis->pDrvMedia->pfnBiosGetPCHSGeometry(pThis->pDrvMedia, pPCHSGeometry);
894	}
895
896	/** @interface_method_impl{PDMIMEDIA,pfnBiosSetPCHSGeometry} */
897	static DECLCALLBACK(int) drvdiskintBiosSetPCHSGeometry(PPDMIMEDIA pInterface,
898	PCPDMMEDIAGEOMETRY pPCHSGeometry)
899	{
900	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
901	return pThis->pDrvMedia->pfnBiosSetPCHSGeometry(pThis->pDrvMedia, pPCHSGeometry);
902	}
903
904	/** @interface_method_impl{PDMIMEDIA,pfnBiosGetLCHSGeometry} */
905	static DECLCALLBACK(int) drvdiskintBiosGetLCHSGeometry(PPDMIMEDIA pInterface,
906	PPDMMEDIAGEOMETRY pLCHSGeometry)
907	{
908	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
909	return pThis->pDrvMedia->pfnBiosGetLCHSGeometry(pThis->pDrvMedia, pLCHSGeometry);
910	}
911
912	/** @interface_method_impl{PDMIMEDIA,pfnBiosSetLCHSGeometry} */
913	static DECLCALLBACK(int) drvdiskintBiosSetLCHSGeometry(PPDMIMEDIA pInterface,
914	PCPDMMEDIAGEOMETRY pLCHSGeometry)
915	{
916	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
917	return pThis->pDrvMedia->pfnBiosSetLCHSGeometry(pThis->pDrvMedia, pLCHSGeometry);
918	}
919
920	/** @interface_method_impl{PDMIMEDIA,pfnGetUuid} */
921	static DECLCALLBACK(int) drvdiskintGetUuid(PPDMIMEDIA pInterface, PRTUUID pUuid)
922	{
923	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
924	return pThis->pDrvMedia->pfnGetUuid(pThis->pDrvMedia, pUuid);
925	}
926
927	/** @interface_method_impl{PDMIMEDIA,pfnGetSectorSize} */
928	static DECLCALLBACK(uint32_t) drvdiskintGetSectorSize(PPDMIMEDIA pInterface)
929	{
930	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
931	return pThis->pDrvMedia->pfnGetSectorSize(pThis->pDrvMedia);
932	}
933
934	/** @interface_method_impl{PDMIMEDIA,pfnDiscard} */
935	static DECLCALLBACK(int) drvdiskintDiscard(PPDMIMEDIA pInterface, PCRTRANGE paRanges, unsigned cRanges)
936	{
937	int rc = VINF_SUCCESS;
938	VDIOLOGENT hIoLogEntry = NULL;
939	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
940
941	if (pThis->hIoLogger)
942	{
943	rc = VDDbgIoLogStartDiscard(pThis->hIoLogger, false, paRanges, cRanges, &hIoLogEntry);
944	AssertRC(rc);
945	}
946
947	rc = pThis->pDrvMedia->pfnDiscard(pThis->pDrvMedia, paRanges, cRanges);
948
949	if (pThis->hIoLogger)
950	{
951	int rc2 = VDDbgIoLogComplete(pThis->hIoLogger, hIoLogEntry, rc, NULL);
952	AssertRC(rc2);
953	}
954
955	if (pThis->fCheckConsistency)
956	rc = drvdiskintDiscardRecords(pThis, paRanges, cRanges);
957
958	return rc;
959	}
960
961	/** @interface_method_impl{PDMIMEDIA,pfnReadPcBios} */
962	static DECLCALLBACK(int) drvdiskintReadPcBios(PPDMIMEDIA pInterface,
963	uint64_t off, void *pvBuf, size_t cbRead)
964	{
965	LogFlowFunc(("\n"));
966	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
967
968	return pThis->pDrvMedia->pfnReadPcBios(pThis->pDrvMedia, off, pvBuf, cbRead);
969	}
970
971	/** @interface_method_impl{PDMIMEDIA,pfnIsNonRotational} */
972	static DECLCALLBACK(bool) drvdiskintIsNonRotational(PPDMIMEDIA pInterface)
973	{
974	PDRVDISKINTEGRITY pThis = PDMIMEDIA_2_DRVDISKINTEGRITY(pInterface);
975	return pThis->pDrvMedia->pfnIsNonRotational(pThis->pDrvMedia);
976	}
977
978	/* -=-=-=-=- IMediaPort -=-=-=-=- */
979
980	/** Makes a PDRVBLOCK out of a PPDMIMEDIAPORT. */
981	#define PDMIMEDIAPORT_2_DRVDISKINTEGRITY(pInterface) ( (PDRVDISKINTEGRITY((uintptr_t)pInterface - RT_OFFSETOF(DRVDISKINTEGRITY, IMediaPort))) )
982
983	/**
984	* @interface_method_impl{PDMIMEDIAPORT,pfnQueryDeviceLocation}
985	*/
986	static DECLCALLBACK(int) drvdiskintQueryDeviceLocation(PPDMIMEDIAPORT pInterface, const char **ppcszController,
987	uint32_t piInstance, uint32_t piLUN)
988	{
989	PDRVDISKINTEGRITY pThis = PDMIMEDIAPORT_2_DRVDISKINTEGRITY(pInterface);
990
991	return pThis->pDrvMediaPort->pfnQueryDeviceLocation(pThis->pDrvMediaPort, ppcszController,
992	piInstance, piLUN);
993	}
994
995	/* -=-=-=-=- IMediaExPort -=-=-=-=- */
996
997	/**
998	* @interface_method_impl{PDMIMEDIAEXPORT,pfnIoReqCompleteNotify}
999	*/
1000	static DECLCALLBACK(int) drvdiskintIoReqCompleteNotify(PPDMIMEDIAEXPORT pInterface, PDMMEDIAEXIOREQ hIoReq,
1001	void *pvIoReqAlloc, int rcReq)
1002	{
1003	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaExPort);
1004	PDRVDISKAIOREQ pIoReq = DISKINTEGRITY_IOREQ_ALLOC_2_DRVDISKAIOREQ(pvIoReqAlloc);
1005	int rc = VINF_SUCCESS;
1006
1007	LogFlowFunc(("pIoReq=%#p\n", pIoReq));
1008
1009	/* Remove from the active list. */
1010	if (pThis->fTraceRequests)
1011	drvdiskintIoReqRemove(pThis, pIoReq);
1012
1013	if (RT_SUCCESS(rcReq) && pThis->fCheckConsistency)
1014	{
1015	if (pIoReq->enmTxDir == DRVDISKAIOTXDIR_READ)
1016	rc = drvdiskintReadVerify(pThis, &pIoReq->IoSeg, 1, pIoReq->off, pIoReq->cbTransfer);
1017	else if ( pIoReq->enmTxDir == DRVDISKAIOTXDIR_WRITE
1018	&& !pThis->fRecordWriteBeforeCompletion)
1019	rc = drvdiskintWriteRecord(pThis, &pIoReq->IoSeg, 1, pIoReq->off, pIoReq->cbTransfer);
1020	else if (pIoReq->enmTxDir == DRVDISKAIOTXDIR_DISCARD)
1021	rc = drvdiskintDiscardRecords(pThis, pIoReq->paRanges, pIoReq->cRanges);
1022	else if (pIoReq->enmTxDir == DRVDISKAIOTXDIR_READ_AFTER_WRITE)
1023	rc = drvdiskintReadAfterWriteVerify(pThis, pIoReq);
1024	else
1025	AssertMsg( pIoReq->enmTxDir == DRVDISKAIOTXDIR_FLUSH
1026	\|\| ( pIoReq->enmTxDir == DRVDISKAIOTXDIR_WRITE
1027	&& pThis->fRecordWriteBeforeCompletion), ("Huh?\n"));
1028
1029	AssertRC(rc);
1030	}
1031
1032	if ( RT_SUCCESS(rcReq)
1033	&& pThis->fValidateMemBufs
1034	&& pIoReq->enmTxDir == DRVDISKAIOTXDIR_READ)
1035	{
1036	/* Check that the guest memory buffer matches what was written. */
1037	RTSGSEG SegCmp;
1038	SegCmp.pvSeg = RTMemAlloc(pIoReq->cbTransfer);
1039	SegCmp.cbSeg = pIoReq->cbTransfer;
1040
1041	RTSGBUF SgBufCmp;
1042	RTSgBufInit(&SgBufCmp, &SegCmp, 1);
1043	rc = pThis->pDrvMediaExPort->pfnIoReqCopyToBuf(pThis->pDrvMediaExPort, hIoReq,
1044	DISKINTEGRITY_IOREQ_ALLOC_2_UPPER(pvIoReqAlloc),
1045	0, &SgBufCmp, pIoReq->cbTransfer);
1046	AssertRC(rc);
1047
1048	RTSGBUF SgBuf;
1049	RTSgBufInit(&SgBuf, &pIoReq->IoSeg, 1);
1050	if (RTSgBufCmp(&SgBuf, &SgBufCmp, pIoReq->cbTransfer))
1051	{
1052	RTMsgError("Corrupted memory buffer at offset %llu!\n", 0);
1053	RTAssertDebugBreak();
1054	}
1055
1056	RTMemFree(SegCmp.pvSeg);
1057	}
1058
1059	if (pThis->hIoLogger)
1060	{
1061	RTSGBUF SgBuf;
1062
1063	if (pIoReq->enmTxDir == DRVDISKAIOTXDIR_READ)
1064	RTSgBufInit(&SgBuf, &pIoReq->IoSeg, 1);
1065
1066	int rc2 = VDDbgIoLogComplete(pThis->hIoLogger, pIoReq->hIoLogEntry, rc, &SgBuf);
1067	AssertRC(rc2);
1068	}
1069
1070	if ( pThis->fReadAfterWrite
1071	&& pIoReq->enmTxDir == DRVDISKAIOTXDIR_WRITE)
1072	{
1073	#if 0 /** @todo */
1074	pIoReq->enmTxDir = DRVDISKAIOTXDIR_READ_AFTER_WRITE;
1075
1076	/* Add again because it was removed above. */
1077	if (pThis->fTraceRequests)
1078	drvdiskintIoReqAdd(pThis, pIoReq);
1079
1080	rc = pThis->pDrvMediaAsync->pfnStartRead(pThis->pDrvMediaAsync, pIoReq->off, pIoReq->paSeg, pIoReq->cSeg,
1081	pIoReq->cbTransfer, pIoReq);
1082	if (rc == VINF_VD_ASYNC_IO_FINISHED)
1083	{
1084	rc = drvdiskintReadAfterWriteVerify(pThis, pIoReq);
1085
1086	if (pThis->fTraceRequests)
1087	drvdiskintIoReqRemove(pThis, pIoReq);
1088	RTMemFree(pIoReq);
1089	}
1090	else if (rc == VERR_VD_ASYNC_IO_IN_PROGRESS)
1091	rc = VINF_SUCCESS;
1092	else if (RT_FAILURE(rc))
1093	RTMemFree(pIoReq);
1094	#endif
1095	}
1096	else
1097	{
1098	rc = pThis->pDrvMediaExPort->pfnIoReqCompleteNotify(pThis->pDrvMediaExPort, hIoReq,
1099	DISKINTEGRITY_IOREQ_ALLOC_2_UPPER(pvIoReqAlloc),
1100	rcReq);
1101	/* Put on the watch list. */
1102	if (pThis->fCheckDoubleCompletion)
1103	drvdiskintIoReqCheckForDoubleCompletion(pThis, pIoReq, true /* fMediaEx */);
1104	}
1105
1106	return rc;
1107	}
1108
1109	/**
1110	* @interface_method_impl{PDMIMEDIAEXPORT,pfnIoReqCopyFromBuf}
1111	*/
1112	static DECLCALLBACK(int) drvdiskintIoReqCopyFromBuf(PPDMIMEDIAEXPORT pInterface, PDMMEDIAEXIOREQ hIoReq,
1113	void *pvIoReqAlloc, uint32_t offDst, PRTSGBUF pSgBuf,
1114	size_t cbCopy)
1115	{
1116	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaExPort);
1117	PDRVDISKAIOREQ pIoReq = DISKINTEGRITY_IOREQ_ALLOC_2_DRVDISKAIOREQ(pvIoReqAlloc);
1118	RTSGBUF SgBuf;
1119
1120	RTSgBufClone(&SgBuf, pSgBuf);
1121
1122	int rc = pThis->pDrvMediaExPort->pfnIoReqCopyFromBuf(pThis->pDrvMediaExPort, hIoReq,
1123	DISKINTEGRITY_IOREQ_ALLOC_2_UPPER(pvIoReqAlloc),
1124	offDst, pSgBuf, cbCopy);
1125	if ( RT_SUCCESS(rc)
1126	&& pIoReq->IoSeg.pvSeg)
1127	{
1128	/* Update our copy. */
1129	RTSgBufCopyToBuf(&SgBuf, (uint8_t *)pIoReq->IoSeg.pvSeg + offDst, cbCopy);
1130
1131	/* Validate the just read data against our copy if possible. */
1132	if ( pThis->fValidateMemBufs
1133	&& pThis->fCheckConsistency
1134	&& pIoReq->enmTxDir == DRVDISKAIOTXDIR_READ)
1135	{
1136	RTSGSEG Seg;
1137
1138	Seg.pvSeg = (uint8_t *)pIoReq->IoSeg.pvSeg + offDst;
1139	Seg.cbSeg = cbCopy;
1140
1141	rc = drvdiskintReadVerify(pThis, &Seg, 1, pIoReq->off + offDst,
1142	cbCopy);
1143	}
1144	}
1145
1146	return rc;
1147	}
1148
1149	/**
1150	* @interface_method_impl{PDMIMEDIAEXPORT,pfnIoReqCopyToBuf}
1151	*/
1152	static DECLCALLBACK(int) drvdiskintIoReqCopyToBuf(PPDMIMEDIAEXPORT pInterface, PDMMEDIAEXIOREQ hIoReq,
1153	void *pvIoReqAlloc, uint32_t offSrc, PRTSGBUF pSgBuf,
1154	size_t cbCopy)
1155	{
1156	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaExPort);
1157	PDRVDISKAIOREQ pIoReq = DISKINTEGRITY_IOREQ_ALLOC_2_DRVDISKAIOREQ(pvIoReqAlloc);
1158	RTSGBUF SgBuf;
1159
1160	RTSgBufClone(&SgBuf, pSgBuf);
1161
1162	int rc = pThis->pDrvMediaExPort->pfnIoReqCopyToBuf(pThis->pDrvMediaExPort, hIoReq,
1163	DISKINTEGRITY_IOREQ_ALLOC_2_UPPER(pvIoReqAlloc),
1164	offSrc, pSgBuf, cbCopy);
1165	if ( RT_SUCCESS(rc)
1166	&& pIoReq->IoSeg.pvSeg)
1167	{
1168	if (pThis->fValidateMemBufs)
1169	{
1170	/* Make sure what the caller requested matches what we got earlier. */
1171	RTSGBUF SgBufCmp;
1172	RTSgBufInit(&SgBufCmp, &pIoReq->IoSeg, 1);
1173	RTSgBufAdvance(&SgBufCmp, offSrc);
1174
1175	if (RTSgBufCmp(&SgBuf, &SgBufCmp, cbCopy))
1176	{
1177	RTMsgError("Corrupted memory buffer at offset %llu!\n", offSrc);
1178	RTAssertDebugBreak();
1179	}
1180	}
1181	else
1182	{
1183	/* Update our copy. */
1184	RTSgBufCopyToBuf(&SgBuf, (uint8_t *)pIoReq->IoSeg.pvSeg + offSrc, cbCopy);
1185	}
1186	}
1187
1188	return rc;
1189	}
1190
1191	/**
1192	* @interface_method_impl{PDMIMEDIAEXPORT,pfnIoReqQueryDiscardRanges}
1193	*/
1194	static DECLCALLBACK(int) drvdiskintIoReqQueryDiscardRanges(PPDMIMEDIAEXPORT pInterface, PDMMEDIAEXIOREQ hIoReq,
1195	void *pvIoReqAlloc, uint32_t idxRangeStart,
1196	uint32_t cRanges, PRTRANGE paRanges,
1197	uint32_t *pcRanges)
1198	{
1199	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaExPort);
1200	return pThis->pDrvMediaExPort->pfnIoReqQueryDiscardRanges(pThis->pDrvMediaExPort, hIoReq,
1201	DISKINTEGRITY_IOREQ_ALLOC_2_UPPER(pvIoReqAlloc),
1202	idxRangeStart, cRanges, paRanges, pcRanges);
1203	}
1204
1205	/**
1206	* @interface_method_impl{PDMIMEDIAEXPORT,pfnIoReqStateChanged}
1207	*/
1208	static DECLCALLBACK(void) drvdiskintIoReqStateChanged(PPDMIMEDIAEXPORT pInterface, PDMMEDIAEXIOREQ hIoReq,
1209	void *pvIoReqAlloc, PDMMEDIAEXIOREQSTATE enmState)
1210	{
1211	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaExPort);
1212	pThis->pDrvMediaExPort->pfnIoReqStateChanged(pThis->pDrvMediaExPort, hIoReq,
1213	DISKINTEGRITY_IOREQ_ALLOC_2_UPPER(pvIoReqAlloc),
1214	enmState);
1215	}
1216
1217	/* -=-=-=-=- IMediaEx -=-=-=-=- */
1218
1219	/**
1220	* @interface_method_impl{PDMIMEDIAEX,pfnQueryFeatures}
1221	*/
1222	static DECLCALLBACK(int) drvdiskintQueryFeatures(PPDMIMEDIAEX pInterface, uint32_t *pfFeatures)
1223	{
1224	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1225	return pThis->pDrvMediaEx->pfnQueryFeatures(pThis->pDrvMediaEx, pfFeatures);
1226	}
1227
1228	/**
1229	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqAllocSizeSet}
1230	*/
1231	static DECLCALLBACK(int) drvdiskintIoReqAllocSizeSet(PPDMIMEDIAEX pInterface, size_t cbIoReqAlloc)
1232	{
1233	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1234
1235	/* Increase the amount by the size of a pointer to our private tracking structure. */
1236	cbIoReqAlloc += sizeof(PDRVDISKAIOREQ);
1237
1238	pThis->fCheckDoubleCompletion = false;
1239
1240	return pThis->pDrvMediaEx->pfnIoReqAllocSizeSet(pThis->pDrvMediaEx, cbIoReqAlloc);
1241	}
1242
1243	/**
1244	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqAlloc}
1245	*/
1246	static DECLCALLBACK(int) drvdiskintIoReqAlloc(PPDMIMEDIAEX pInterface, PPDMMEDIAEXIOREQ phIoReq, void **ppvIoReqAlloc,
1247	PDMMEDIAEXIOREQID uIoReqId, uint32_t fFlags)
1248	{
1249	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1250	int rc = VINF_SUCCESS;
1251	PDRVDISKAIOREQ pIoReq = (PDRVDISKAIOREQ)RTMemCacheAlloc(pThis->hReqCache);
1252	if (RT_LIKELY(pIoReq))
1253	{
1254	pIoReq->enmTxDir = DRVDISKAIOTXDIR_INVALID;
1255	pIoReq->off = 0;
1256	pIoReq->cbTransfer = 0;
1257	pIoReq->paSeg = NULL;
1258	pIoReq->cSeg = 0;
1259	pIoReq->pvUser = NULL;
1260	pIoReq->iSlot = 0;
1261	pIoReq->tsStart = 0;
1262	pIoReq->tsComplete = 0;
1263	pIoReq->hIoLogEntry = NULL;
1264	pIoReq->IoSeg.pvSeg = NULL;
1265	pIoReq->IoSeg.cbSeg = 0;
1266
1267	PDRVDISKAIOREQ *ppIoReq = NULL;
1268	rc = pThis->pDrvMediaEx->pfnIoReqAlloc(pThis->pDrvMediaEx, phIoReq, (void **)&ppIoReq, uIoReqId, fFlags);
1269	if RT_SUCCESS(rc)
1270	{
1271	/*
1272	* Store the size off the start of our tracking structure because it is
1273	* required to access it for the read/write callbacks.
1274	*
1275	* ASSUMPTION that the offset is constant.
1276	*/
1277	if (!pThis->cbIoReqOpaque)
1278	pThis->cbIoReqOpaque = (uintptr_t)ppIoReq - (uintptr_t)*phIoReq;
1279	else
1280	Assert(pThis->cbIoReqOpaque == (uintptr_t)ppIoReq - (uintptr_t)*phIoReq);
1281
1282	*ppIoReq = pIoReq;
1283	ppvIoReqAlloc = ((uint8_t )ppIoReq) + sizeof(PDRVDISKAIOREQ);
1284	}
1285	else
1286	RTMemCacheFree(pThis->hReqCache, pIoReq);
1287	}
1288	else
1289	rc = VERR_NO_MEMORY;
1290
1291	return rc;
1292	}
1293
1294	/**
1295	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqFree}
1296	*/
1297	static DECLCALLBACK(int) drvdiskintIoReqFree(PPDMIMEDIAEX pInterface, PDMMEDIAEXIOREQ hIoReq)
1298	{
1299	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1300	PDRVDISKAIOREQ pIoReq = DISKINTEGRITY_IOREQ_HANDLE_2_DRVDISKAIOREQ(pThis, hIoReq);
1301
1302	if (pIoReq->IoSeg.pvSeg)
1303	RTMemFree(pIoReq->IoSeg.pvSeg);
1304
1305	return pThis->pDrvMediaEx->pfnIoReqFree(pThis->pDrvMediaEx, hIoReq);
1306	}
1307
1308	/**
1309	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqQueryResidual}
1310	*/
1311	static DECLCALLBACK(int) drvdiskintIoReqQueryResidual(PPDMIMEDIAEX pInterface, PDMMEDIAEXIOREQ hIoReq, size_t *pcbResidual)
1312	{
1313	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1314	return pThis->pDrvMediaEx->pfnIoReqQueryResidual(pThis->pDrvMediaEx, hIoReq, pcbResidual);
1315	}
1316
1317	/**
1318	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqQueryXferSize}
1319	*/
1320	static DECLCALLBACK(int) drvdiskintIoReqQueryXferSize(PPDMIMEDIAEX pInterface, PDMMEDIAEXIOREQ hIoReq, size_t *pcbXfer)
1321	{
1322	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1323	return pThis->pDrvMediaEx->pfnIoReqQueryXferSize(pThis->pDrvMediaEx, hIoReq, pcbXfer);
1324	}
1325
1326	/**
1327	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqCancelAll}
1328	*/
1329	static DECLCALLBACK(int) drvdiskintIoReqCancelAll(PPDMIMEDIAEX pInterface)
1330	{
1331	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1332	return pThis->pDrvMediaEx->pfnIoReqCancelAll(pThis->pDrvMediaEx);
1333	}
1334
1335	/**
1336	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqCancel}
1337	*/
1338	static DECLCALLBACK(int) drvdiskintIoReqCancel(PPDMIMEDIAEX pInterface, PDMMEDIAEXIOREQID uIoReqId)
1339	{
1340	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1341	return pThis->pDrvMediaEx->pfnIoReqCancel(pThis->pDrvMediaEx, uIoReqId);
1342	}
1343
1344	/**
1345	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqRead}
1346	*/
1347	static DECLCALLBACK(int) drvdiskintIoReqRead(PPDMIMEDIAEX pInterface, PDMMEDIAEXIOREQ hIoReq, uint64_t off, size_t cbRead)
1348	{
1349	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1350	PDRVDISKAIOREQ pIoReq = DISKINTEGRITY_IOREQ_HANDLE_2_DRVDISKAIOREQ(pThis, hIoReq);
1351
1352	pIoReq->enmTxDir = DRVDISKAIOTXDIR_READ;
1353	pIoReq->off = off;
1354	pIoReq->cbTransfer = cbRead;
1355
1356	/* Allocate a I/O buffer if the I/O is verified.*/
1357	if (pThis->fCheckConsistency)
1358	{
1359	pIoReq->IoSeg.pvSeg = RTMemAlloc(cbRead);
1360	pIoReq->IoSeg.cbSeg = cbRead;
1361	}
1362
1363	if (pThis->fTraceRequests)
1364	drvdiskintIoReqAdd(pThis, pIoReq);
1365
1366	if (pThis->hIoLogger)
1367	{
1368	int rc2 = VDDbgIoLogStart(pThis->hIoLogger, true, VDDBGIOLOGREQ_READ, off,
1369	cbRead, NULL, &pIoReq->hIoLogEntry);
1370	AssertRC(rc2);
1371	}
1372
1373	int rc = pThis->pDrvMediaEx->pfnIoReqRead(pThis->pDrvMediaEx, hIoReq, off, cbRead);
1374	if (rc == VINF_SUCCESS)
1375	{
1376	/* Verify the read now. */
1377	if (pThis->fCheckConsistency)
1378	{
1379	int rc2 = drvdiskintReadVerify(pThis, &pIoReq->IoSeg, 1, off, cbRead);
1380	AssertRC(rc2);
1381	}
1382
1383	if (pThis->hIoLogger)
1384	{
1385	RTSGBUF SgBuf;
1386
1387	RTSgBufInit(&SgBuf, &pIoReq->IoSeg, 1);
1388
1389	int rc2 = VDDbgIoLogComplete(pThis->hIoLogger, pIoReq->hIoLogEntry, VINF_SUCCESS, &SgBuf);
1390	AssertRC(rc2);
1391	}
1392
1393	if (pThis->fTraceRequests)
1394	drvdiskintIoReqRemove(pThis, pIoReq);
1395	}
1396
1397	LogFlowFunc(("returns %Rrc\n", rc));
1398	return rc;
1399	}
1400
1401	/**
1402	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqWrite}
1403	*/
1404	static DECLCALLBACK(int) drvdiskintIoReqWrite(PPDMIMEDIAEX pInterface, PDMMEDIAEXIOREQ hIoReq, uint64_t off, size_t cbWrite)
1405	{
1406	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1407	PDRVDISKAIOREQ pIoReq = DISKINTEGRITY_IOREQ_HANDLE_2_DRVDISKAIOREQ(pThis, hIoReq);
1408
1409	pIoReq->enmTxDir = DRVDISKAIOTXDIR_WRITE;
1410	pIoReq->off = off;
1411	pIoReq->cbTransfer = cbWrite;
1412
1413	/* Allocate a I/O buffer if the I/O is verified.*/
1414	if ( pThis->fCheckConsistency
1415	\|\| pThis->fValidateMemBufs
1416	\|\| pThis->hIoLogger
1417	\|\| pThis->fRecordWriteBeforeCompletion)
1418	{
1419	pIoReq->IoSeg.pvSeg = RTMemAlloc(cbWrite);
1420	pIoReq->IoSeg.cbSeg = cbWrite;
1421
1422	/* Sync the memory buffer over if we should validate it. */
1423	if ( pThis->fValidateMemBufs
1424	\|\| pThis->hIoLogger
1425	\|\| pThis->fRecordWriteBeforeCompletion)
1426	{
1427	RTSGBUF SgBuf;
1428
1429	RTSgBufInit(&SgBuf, &pIoReq->IoSeg, 1);
1430	int rc2 = pThis->pDrvMediaExPort->pfnIoReqCopyToBuf(pThis->pDrvMediaExPort, hIoReq,
1431	DISKINTEGRITY_IOREQ_HANDLE_2_UPPER_OPAQUE(pThis, hIoReq),
1432	0, &SgBuf, cbWrite);
1433	AssertRC(rc2);
1434	}
1435	}
1436
1437	if (pThis->fTraceRequests)
1438	drvdiskintIoReqAdd(pThis, pIoReq);
1439
1440	if (pThis->hIoLogger)
1441	{
1442	RTSGBUF SgBuf;
1443
1444	RTSgBufInit(&SgBuf, &pIoReq->IoSeg, 1);
1445	int rc2 = VDDbgIoLogStart(pThis->hIoLogger, true, VDDBGIOLOGREQ_WRITE, off,
1446	cbWrite, &SgBuf, &pIoReq->hIoLogEntry);
1447	AssertRC(rc2);
1448	}
1449
1450	if (pThis->fRecordWriteBeforeCompletion)
1451	{
1452
1453	int rc2 = drvdiskintWriteRecord(pThis, &pIoReq->IoSeg, 1, off, cbWrite);
1454	AssertRC(rc2);
1455	}
1456
1457	int rc = pThis->pDrvMediaEx->pfnIoReqWrite(pThis->pDrvMediaEx, hIoReq, off, cbWrite);
1458	if (rc == VINF_SUCCESS)
1459	{
1460	/* Record the write. */
1461	if ( pThis->fCheckConsistency
1462	&& !pThis->fRecordWriteBeforeCompletion)
1463	{
1464	int rc2 = drvdiskintWriteRecord(pThis, &pIoReq->IoSeg, 1, off, cbWrite);
1465	AssertRC(rc2);
1466	}
1467
1468	if (pThis->hIoLogger)
1469	{
1470	int rc2 = VDDbgIoLogComplete(pThis->hIoLogger, pIoReq->hIoLogEntry, VINF_SUCCESS, NULL);
1471	AssertRC(rc2);
1472	}
1473
1474	if (pThis->fTraceRequests)
1475	drvdiskintIoReqRemove(pThis, pIoReq);
1476	}
1477
1478	LogFlowFunc(("returns %Rrc\n", rc));
1479	return rc;
1480	}
1481
1482	/**
1483	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqFlush}
1484	*/
1485	static DECLCALLBACK(int) drvdiskintIoReqFlush(PPDMIMEDIAEX pInterface, PDMMEDIAEXIOREQ hIoReq)
1486	{
1487	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1488	PDRVDISKAIOREQ pIoReq = DISKINTEGRITY_IOREQ_HANDLE_2_DRVDISKAIOREQ(pThis, hIoReq);
1489
1490	pIoReq->enmTxDir = DRVDISKAIOTXDIR_FLUSH;
1491	pIoReq->off = 0;
1492	pIoReq->cbTransfer = 0;
1493
1494	if (pThis->fTraceRequests)
1495	drvdiskintIoReqAdd(pThis, pIoReq);
1496
1497	if (pThis->hIoLogger)
1498	{
1499	int rc2 = VDDbgIoLogStart(pThis->hIoLogger, true, VDDBGIOLOGREQ_FLUSH, 0,
1500	0, NULL, &pIoReq->hIoLogEntry);
1501	AssertRC(rc2);
1502	}
1503
1504	int rc = pThis->pDrvMediaEx->pfnIoReqFlush(pThis->pDrvMediaEx, hIoReq);
1505	if (rc == VINF_SUCCESS)
1506	{
1507	if (pThis->hIoLogger)
1508	{
1509	int rc2 = VDDbgIoLogComplete(pThis->hIoLogger, pIoReq->hIoLogEntry, VINF_SUCCESS, NULL);
1510	AssertRC(rc2);
1511	}
1512	}
1513
1514	LogFlowFunc(("returns %Rrc\n", rc));
1515	return rc;
1516	}
1517
1518	/**
1519	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqDiscard}
1520	*/
1521	static DECLCALLBACK(int) drvdiskintIoReqDiscard(PPDMIMEDIAEX pInterface, PDMMEDIAEXIOREQ hIoReq, unsigned cRangesMax)
1522	{
1523	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1524	return pThis->pDrvMediaEx->pfnIoReqDiscard(pThis->pDrvMediaEx, hIoReq, cRangesMax);
1525	}
1526
1527	/**
1528	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqGetActiveCount}
1529	*/
1530	static DECLCALLBACK(uint32_t) drvdiskintIoReqGetActiveCount(PPDMIMEDIAEX pInterface)
1531	{
1532	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1533	return pThis->pDrvMediaEx->pfnIoReqGetActiveCount(pThis->pDrvMediaEx);
1534	}
1535
1536	/**
1537	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqGetSuspendedCount}
1538	*/
1539	static DECLCALLBACK(uint32_t) drvdiskintIoReqGetSuspendedCount(PPDMIMEDIAEX pInterface)
1540	{
1541	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1542	return pThis->pDrvMediaEx->pfnIoReqGetSuspendedCount(pThis->pDrvMediaEx);
1543	}
1544
1545	/**
1546	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqQuerySuspendedStart}
1547	*/
1548	static DECLCALLBACK(int) drvdiskintIoReqQuerySuspendedStart(PPDMIMEDIAEX pInterface, PPDMMEDIAEXIOREQ phIoReq, void **ppvIoReqAlloc)
1549	{
1550	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1551	return pThis->pDrvMediaEx->pfnIoReqQuerySuspendedStart(pThis->pDrvMediaEx, phIoReq, ppvIoReqAlloc);
1552	}
1553
1554	/**
1555	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqQuerySuspendedNext}
1556	*/
1557	static DECLCALLBACK(int) drvdiskintIoReqQuerySuspendedNext(PPDMIMEDIAEX pInterface, PDMMEDIAEXIOREQ hIoReq,
1558	PPDMMEDIAEXIOREQ phIoReqNext, void **ppvIoReqAllocNext)
1559	{
1560	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1561	return pThis->pDrvMediaEx->pfnIoReqQuerySuspendedNext(pThis->pDrvMediaEx, hIoReq, phIoReqNext, ppvIoReqAllocNext);
1562	}
1563
1564	/**
1565	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqSuspendedSave}
1566	*/
1567	static DECLCALLBACK(int) drvdiskintIoReqSuspendedSave(PPDMIMEDIAEX pInterface, PSSMHANDLE pSSM, PDMMEDIAEXIOREQ hIoReq)
1568	{
1569	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1570	return pThis->pDrvMediaEx->pfnIoReqSuspendedSave(pThis->pDrvMediaEx, pSSM, hIoReq);
1571	}
1572
1573	/**
1574	* @interface_method_impl{PDMIMEDIAEX,pfnIoReqSuspendedLoad}
1575	*/
1576	static DECLCALLBACK(int) drvdiskintIoReqSuspendedLoad(PPDMIMEDIAEX pInterface, PSSMHANDLE pSSM, PDMMEDIAEXIOREQ hIoReq)
1577	{
1578	PDRVDISKINTEGRITY pThis = RT_FROM_MEMBER(pInterface, DRVDISKINTEGRITY, IMediaEx);
1579	return pThis->pDrvMediaEx->pfnIoReqSuspendedLoad(pThis->pDrvMediaEx, pSSM, hIoReq);
1580	}
1581
1582	/* -=-=-=-=- IBase -=-=-=-=- */
1583
1584	/**
1585	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
1586	*/
1587	static DECLCALLBACK(void ) drvdiskintQueryInterface(PPDMIBASE pInterface, const char pszIID)
1588	{
1589	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
1590	PDRVDISKINTEGRITY pThis = PDMINS_2_DATA(pDrvIns, PDRVDISKINTEGRITY);
1591
1592	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
1593	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMEDIA, &pThis->IMedia);
1594	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMEDIAPORT, &pThis->IMediaPort);
1595	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMEDIAEXPORT, &pThis->IMediaExPort);
1596	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMEDIAEX, pThis->pDrvMediaEx ? &pThis->IMediaEx : NULL);
1597	return NULL;
1598	}
1599
1600
1601	/* -=-=-=-=- driver interface -=-=-=-=- */
1602
1603	static DECLCALLBACK(int) drvdiskintTreeDestroy(PAVLRFOFFNODECORE pNode, void *pvUser)
1604	{
1605	PDRVDISKSEGMENT pSeg = (PDRVDISKSEGMENT)pNode;
1606
1607	RT_NOREF(pvUser);
1608
1609	RTMemFree(pSeg->pbSeg);
1610	RTMemFree(pSeg);
1611	return VINF_SUCCESS;
1612	}
1613
1614	/**
1615	* @copydoc FNPDMDRVDESTRUCT
1616	*/
1617	static DECLCALLBACK(void) drvdiskintDestruct(PPDMDRVINS pDrvIns)
1618	{
1619	PDRVDISKINTEGRITY pThis = PDMINS_2_DATA(pDrvIns, PDRVDISKINTEGRITY);
1620
1621	if (pThis->pTreeSegments)
1622	{
1623	RTAvlrFileOffsetDestroy(pThis->pTreeSegments, drvdiskintTreeDestroy, NULL);
1624	RTMemFree(pThis->pTreeSegments);
1625	}
1626
1627	if (pThis->fTraceRequests)
1628	{
1629	pThis->fRunning = false;
1630	RTSemEventSignal(pThis->SemEvent);
1631	RTSemEventDestroy(pThis->SemEvent);
1632	}
1633
1634	if (pThis->fCheckDoubleCompletion)
1635	{
1636	/* Free all requests */
1637	while (pThis->papIoReq[pThis->iEntry])
1638	{
1639	RTMemFree(pThis->papIoReq[pThis->iEntry]);
1640	pThis->papIoReq[pThis->iEntry] = NULL;
1641	pThis->iEntry = (pThis->iEntry+1) % pThis->cEntries;
1642	}
1643	}
1644
1645	if (pThis->hIoLogger)
1646	VDDbgIoLogDestroy(pThis->hIoLogger);
1647
1648	if (pThis->hReqCache != NIL_RTMEMCACHE)
1649	{
1650	RTMemCacheDestroy(pThis->hReqCache);
1651	pThis->hReqCache = NIL_RTMEMCACHE;
1652	}
1653	}
1654
1655	/**
1656	* Construct a disk integrity driver instance.
1657	*
1658	* @copydoc FNPDMDRVCONSTRUCT
1659	*/
1660	static DECLCALLBACK(int) drvdiskintConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
1661	{
1662	int rc = VINF_SUCCESS;
1663	PDRVDISKINTEGRITY pThis = PDMINS_2_DATA(pDrvIns, PDRVDISKINTEGRITY);
1664	LogFlow(("drvdiskintConstruct: iInstance=%d\n", pDrvIns->iInstance));
1665	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
1666
1667	/*
1668	* Validate configuration.
1669	*/
1670	if (!CFGMR3AreValuesValid(pCfg, "CheckConsistency\0"
1671	"TraceRequests\0"
1672	"CheckIntervalMs\0"
1673	"ExpireIntervalMs\0"
1674	"CheckDoubleCompletions\0"
1675	"HistorySize\0"
1676	"IoLog\0"
1677	"IoLogData\0"
1678	"PrepopulateRamDisk\0"
1679	"ReadAfterWrite\0"
1680	"RecordWriteBeforeCompletion\0"
1681	"ValidateMemoryBuffers\0"))
1682	return VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES;
1683
1684	rc = CFGMR3QueryBoolDef(pCfg, "CheckConsistency", &pThis->fCheckConsistency, false);
1685	AssertRC(rc);
1686	rc = CFGMR3QueryBoolDef(pCfg, "TraceRequests", &pThis->fTraceRequests, false);
1687	AssertRC(rc);
1688	rc = CFGMR3QueryU32Def(pCfg, "CheckIntervalMs", &pThis->uCheckIntervalMs, 5000); /* 5 seconds */
1689	AssertRC(rc);
1690	rc = CFGMR3QueryU32Def(pCfg, "ExpireIntervalMs", &pThis->uExpireIntervalMs, 20000); /* 20 seconds */
1691	AssertRC(rc);
1692	rc = CFGMR3QueryBoolDef(pCfg, "CheckDoubleCompletions", &pThis->fCheckDoubleCompletion, false);
1693	AssertRC(rc);
1694	rc = CFGMR3QueryU32Def(pCfg, "HistorySize", &pThis->cEntries, 512);
1695	AssertRC(rc);
1696	rc = CFGMR3QueryBoolDef(pCfg, "PrepopulateRamDisk", &pThis->fPrepopulateRamDisk, false);
1697	AssertRC(rc);
1698	rc = CFGMR3QueryBoolDef(pCfg, "ReadAfterWrite", &pThis->fReadAfterWrite, false);
1699	AssertRC(rc);
1700	rc = CFGMR3QueryBoolDef(pCfg, "RecordWriteBeforeCompletion", &pThis->fRecordWriteBeforeCompletion, false);
1701	AssertRC(rc);
1702	rc = CFGMR3QueryBoolDef(pCfg, "ValidateMemoryBuffers", &pThis->fValidateMemBufs, false);
1703	AssertRC(rc);
1704
1705	bool fIoLogData = false;
1706	rc = CFGMR3QueryBoolDef(pCfg, "IoLogData", &fIoLogData, false);
1707	AssertRC(rc);
1708	char *pszIoLogFilename = NULL;
1709	rc = CFGMR3QueryStringAlloc(pCfg, "IoLog", &pszIoLogFilename);
1710	Assert(RT_SUCCESS(rc) \|\| rc == VERR_CFGM_VALUE_NOT_FOUND);
1711
1712	/*
1713	* Initialize most of the data members.
1714	*/
1715	pThis->pDrvIns = pDrvIns;
1716	pThis->hReqCache = NIL_RTMEMCACHE;
1717
1718	/* IBase. */
1719	pDrvIns->IBase.pfnQueryInterface = drvdiskintQueryInterface;
1720
1721	/* IMedia */
1722	pThis->IMedia.pfnRead = drvdiskintRead;
1723	pThis->IMedia.pfnWrite = drvdiskintWrite;
1724	pThis->IMedia.pfnFlush = drvdiskintFlush;
1725	pThis->IMedia.pfnGetSize = drvdiskintGetSize;
1726	pThis->IMedia.pfnIsReadOnly = drvdiskintIsReadOnly;
1727	pThis->IMedia.pfnBiosIsVisible = drvdiskintBiosIsVisible;
1728	pThis->IMedia.pfnBiosGetPCHSGeometry = drvdiskintBiosGetPCHSGeometry;
1729	pThis->IMedia.pfnBiosSetPCHSGeometry = drvdiskintBiosSetPCHSGeometry;
1730	pThis->IMedia.pfnBiosGetLCHSGeometry = drvdiskintBiosGetLCHSGeometry;
1731	pThis->IMedia.pfnBiosSetLCHSGeometry = drvdiskintBiosSetLCHSGeometry;
1732	pThis->IMedia.pfnGetUuid = drvdiskintGetUuid;
1733	pThis->IMedia.pfnGetSectorSize = drvdiskintGetSectorSize;
1734	pThis->IMedia.pfnGetType = drvdiskintGetType;
1735	pThis->IMedia.pfnReadPcBios = drvdiskintReadPcBios;
1736	pThis->IMedia.pfnIsNonRotational = drvdiskintIsNonRotational;
1737
1738	/* IMediaEx. */
1739	pThis->IMediaEx.pfnQueryFeatures = drvdiskintQueryFeatures;
1740	pThis->IMediaEx.pfnIoReqAllocSizeSet = drvdiskintIoReqAllocSizeSet;
1741	pThis->IMediaEx.pfnIoReqAlloc = drvdiskintIoReqAlloc;
1742	pThis->IMediaEx.pfnIoReqFree = drvdiskintIoReqFree;
1743	pThis->IMediaEx.pfnIoReqQueryResidual = drvdiskintIoReqQueryResidual;
1744	pThis->IMediaEx.pfnIoReqQueryXferSize = drvdiskintIoReqQueryXferSize;
1745	pThis->IMediaEx.pfnIoReqCancelAll = drvdiskintIoReqCancelAll;
1746	pThis->IMediaEx.pfnIoReqCancel = drvdiskintIoReqCancel;
1747	pThis->IMediaEx.pfnIoReqRead = drvdiskintIoReqRead;
1748	pThis->IMediaEx.pfnIoReqWrite = drvdiskintIoReqWrite;
1749	pThis->IMediaEx.pfnIoReqFlush = drvdiskintIoReqFlush;
1750	pThis->IMediaEx.pfnIoReqDiscard = drvdiskintIoReqDiscard;
1751	pThis->IMediaEx.pfnIoReqGetActiveCount = drvdiskintIoReqGetActiveCount;
1752	pThis->IMediaEx.pfnIoReqGetSuspendedCount = drvdiskintIoReqGetSuspendedCount;
1753	pThis->IMediaEx.pfnIoReqQuerySuspendedStart = drvdiskintIoReqQuerySuspendedStart;
1754	pThis->IMediaEx.pfnIoReqQuerySuspendedNext = drvdiskintIoReqQuerySuspendedNext;
1755	pThis->IMediaEx.pfnIoReqSuspendedSave = drvdiskintIoReqSuspendedSave;
1756	pThis->IMediaEx.pfnIoReqSuspendedLoad = drvdiskintIoReqSuspendedLoad;
1757
1758	/* IMediaPort. */
1759	pThis->IMediaPort.pfnQueryDeviceLocation = drvdiskintQueryDeviceLocation;
1760
1761	/* IMediaExPort. */
1762	pThis->IMediaExPort.pfnIoReqCompleteNotify = drvdiskintIoReqCompleteNotify;
1763	pThis->IMediaExPort.pfnIoReqCopyFromBuf = drvdiskintIoReqCopyFromBuf;
1764	pThis->IMediaExPort.pfnIoReqCopyToBuf = drvdiskintIoReqCopyToBuf;
1765	pThis->IMediaExPort.pfnIoReqQueryDiscardRanges = drvdiskintIoReqQueryDiscardRanges;
1766	pThis->IMediaExPort.pfnIoReqStateChanged = drvdiskintIoReqStateChanged;
1767
1768	/* Query the media port interface above us. */
1769	pThis->pDrvMediaPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMIMEDIAPORT);
1770	if (!pThis->pDrvMediaPort)
1771	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_BELOW,
1772	N_("No media port inrerface above"));
1773
1774	/* Try to attach extended media port interface above.*/
1775	pThis->pDrvMediaExPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMIMEDIAEXPORT);
1776
1777	rc = RTMemCacheCreate(&pThis->hReqCache, sizeof(DRVDISKAIOREQ), 0, UINT32_MAX,
1778	NULL, NULL, NULL, 0);
1779	if (RT_FAILURE(rc))
1780	return PDMDRV_SET_ERROR(pDrvIns, rc,
1781	N_("Failed to create request tracking structure cache"));
1782
1783	/*
1784	* Try attach driver below and query it's media interface.
1785	*/
1786	PPDMIBASE pBase;
1787	rc = PDMDrvHlpAttach(pDrvIns, fFlags, &pBase);
1788	if (RT_FAILURE(rc))
1789	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
1790	N_("Failed to attach driver below us! %Rrc"), rc);
1791
1792	pThis->pDrvMedia = PDMIBASE_QUERY_INTERFACE(pBase, PDMIMEDIA);
1793	if (!pThis->pDrvMedia)
1794	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_BELOW,
1795	N_("No media or async media interface below"));
1796
1797	pThis->pDrvMediaEx = PDMIBASE_QUERY_INTERFACE(pBase, PDMIMEDIAEX);
1798
1799	if (pThis->pDrvMedia->pfnDiscard)
1800	pThis->IMedia.pfnDiscard = drvdiskintDiscard;
1801
1802	if (pThis->fCheckConsistency)
1803	{
1804	/* Create the AVL tree. */
1805	pThis->pTreeSegments = (PAVLRFOFFTREE)RTMemAllocZ(sizeof(AVLRFOFFTREE));
1806	if (!pThis->pTreeSegments)
1807	rc = VERR_NO_MEMORY;
1808	}
1809
1810	if (pThis->fTraceRequests)
1811	{
1812	for (unsigned i = 0; i < RT_ELEMENTS(pThis->apReqActive); i++)
1813	{
1814	pThis->apReqActive[i].pIoReq = NULL;
1815	pThis->apReqActive[i].tsStart = 0;
1816	}
1817
1818	pThis->iNextFreeSlot = 0;
1819
1820	/* Init event semaphore. */
1821	rc = RTSemEventCreate(&pThis->SemEvent);
1822	AssertRC(rc);
1823	pThis->fRunning = true;
1824	rc = RTThreadCreate(&pThis->hThread, drvdiskIntIoReqExpiredCheck, pThis,
1825	0, RTTHREADTYPE_INFREQUENT_POLLER, 0, "DiskIntegrity");
1826	AssertRC(rc);
1827	}
1828
1829	if (pThis->fCheckDoubleCompletion)
1830	{
1831	pThis->iEntry = 0;
1832	pThis->papIoReq = (PDRVDISKAIOREQ )RTMemAllocZ(pThis->cEntries sizeof(PDRVDISKAIOREQ));
1833	AssertPtr(pThis->papIoReq);
1834	}
1835
1836	if (pszIoLogFilename)
1837	{
1838	rc = VDDbgIoLogCreate(&pThis->hIoLogger, pszIoLogFilename, fIoLogData ? VDDBG_IOLOG_LOG_DATA : 0);
1839	MMR3HeapFree(pszIoLogFilename);
1840	}
1841
1842	/* Read in all data before the start if requested. */
1843	if (pThis->fPrepopulateRamDisk)
1844	{
1845	uint64_t cbDisk = 0;
1846
1847	LogRel(("DiskIntegrity: Prepopulating RAM disk, this will take some time...\n"));
1848
1849	cbDisk = pThis->pDrvMedia->pfnGetSize(pThis->pDrvMedia);
1850	if (cbDisk)
1851	{
1852	uint64_t off = 0;
1853	uint8_t abBuffer[_64K];
1854	RTSGSEG Seg;
1855
1856	Seg.pvSeg = abBuffer;
1857
1858	while (cbDisk)
1859	{
1860	size_t cbThisRead = RT_MIN(cbDisk, sizeof(abBuffer));
1861
1862	rc = pThis->pDrvMedia->pfnRead(pThis->pDrvMedia, off, abBuffer, cbThisRead);
1863	if (RT_FAILURE(rc))
1864	break;
1865
1866	if (ASMBitFirstSet(abBuffer, sizeof(abBuffer) * 8) != -1)
1867	{
1868	Seg.cbSeg = cbThisRead;
1869	rc = drvdiskintWriteRecord(pThis, &Seg, 1,
1870	off, cbThisRead);
1871	if (RT_FAILURE(rc))
1872	break;
1873	}
1874
1875	cbDisk -= cbThisRead;
1876	off += cbThisRead;
1877	}
1878
1879	LogRel(("DiskIntegrity: Prepopulating RAM disk finished with %Rrc\n", rc));
1880	}
1881	else
1882	return PDMDRV_SET_ERROR(pDrvIns, VERR_INTERNAL_ERROR,
1883	N_("DiskIntegrity: Error querying the media size below"));
1884	}
1885
1886	return rc;
1887	}
1888
1889
1890	/**
1891	* Block driver registration record.
1892	*/
1893	const PDMDRVREG g_DrvDiskIntegrity =
1894	{
1895	/* u32Version */
1896	PDM_DRVREG_VERSION,
1897	/* szName */
1898	"DiskIntegrity",
1899	/* szRCMod */
1900	"",
1901	/* szR0Mod */
1902	"",
1903	/* pszDescription */
1904	"Disk integrity driver.",
1905	/* fFlags */
1906	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1907	/* fClass. */
1908	PDM_DRVREG_CLASS_BLOCK,
1909	/* cMaxInstances */
1910	~0U,
1911	/* cbInstance */
1912	sizeof(DRVDISKINTEGRITY),
1913	/* pfnConstruct */
1914	drvdiskintConstruct,
1915	/* pfnDestruct */
1916	drvdiskintDestruct,
1917	/* pfnRelocate */
1918	NULL,
1919	/* pfnIOCtl */
1920	NULL,
1921	/* pfnPowerOn */
1922	NULL,
1923	/* pfnReset */
1924	NULL,
1925	/* pfnSuspend */
1926	NULL,
1927	/* pfnResume */
1928	NULL,
1929	/* pfnAttach */
1930	NULL,
1931	/* pfnDetach */
1932	NULL,
1933	/* pfnPowerOff */
1934	NULL,
1935	/* pfnSoftReset */
1936	NULL,
1937	/* u32EndVersion */
1938	PDM_DRVREG_VERSION
1939	};
1940

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

source: vbox/trunk/src/VBox/Devices/Storage/DrvDiskIntegrity.cpp@ 71564

Download in other formats: