ATAPIPassthrough.cpp@ 81844

Last change on this file since 81844 was 81844, checked in by vboxsync, 5 years ago
DevATA: Be paranoid about the I/O buffer accesses. bugref:9218
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1	/* $Id: ATAPIPassthrough.cpp 81844 2019-11-14 18:16:36Z vboxsync $ */
2	/** @file
3	* VBox storage devices: ATAPI emulation (common code for DevATA and DevAHCI).
4	*/
5
6	/*
7	* Copyright (C) 2012-2019 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	#define LOG_GROUP LOG_GROUP_DEV_IDE
18	#include <iprt/log.h>
19	#include <iprt/assert.h>
20	#include <iprt/mem.h>
21	#include <iprt/string.h>
22
23	#include <VBox/log.h>
24	#include <iprt/errcore.h>
25	#include <VBox/cdefs.h>
26	#include <VBox/scsi.h>
27	#include <VBox/scsiinline.h>
28
29	#include "ATAPIPassthrough.h"
30
31	/** The track was not detected yet. */
32	#define TRACK_FLAGS_UNDETECTED RT_BIT_32(0)
33	/** The track is the lead in track of the medium. */
34	#define TRACK_FLAGS_LEAD_IN RT_BIT_32(1)
35	/** The track is the lead out track of the medium. */
36	#define TRACK_FLAGS_LEAD_OUT RT_BIT_32(2)
37
38	/** Don't clear already detected tracks on the medium. */
39	#define ATAPI_TRACK_LIST_REALLOCATE_FLAGS_DONT_CLEAR RT_BIT_32(0)
40
41	/**
42	* Track main data form.
43	*/
44	typedef enum TRACKDATAFORM
45	{
46	/** Invalid data form. */
47	TRACKDATAFORM_INVALID = 0,
48	/** 2352 bytes of data. */
49	TRACKDATAFORM_CDDA,
50	/** CDDA data is pause. */
51	TRACKDATAFORM_CDDA_PAUSE,
52	/** Mode 1 with 2048 bytes sector size. */
53	TRACKDATAFORM_MODE1_2048,
54	/** Mode 1 with 2352 bytes sector size. */
55	TRACKDATAFORM_MODE1_2352,
56	/** Mode 1 with 0 bytes sector size (generated by the drive). */
57	TRACKDATAFORM_MODE1_0,
58	/** XA Mode with 2336 bytes sector size. */
59	TRACKDATAFORM_XA_2336,
60	/** XA Mode with 2352 bytes sector size. */
61	TRACKDATAFORM_XA_2352,
62	/** XA Mode with 0 bytes sector size (generated by the drive). */
63	TRACKDATAFORM_XA_0,
64	/** Mode 2 with 2336 bytes sector size. */
65	TRACKDATAFORM_MODE2_2336,
66	/** Mode 2 with 2352 bytes sector size. */
67	TRACKDATAFORM_MODE2_2352,
68	/** Mode 2 with 0 bytes sector size (generated by the drive). */
69	TRACKDATAFORM_MODE2_0
70	} TRACKDATAFORM;
71
72	/**
73	* Subchannel data form.
74	*/
75	typedef enum SUBCHNDATAFORM
76	{
77	/** Invalid subchannel data form. */
78	SUBCHNDATAFORM_INVALID = 0,
79	/** 0 bytes for the subchannel (generated by the drive). */
80	SUBCHNDATAFORM_0,
81	/** 96 bytes of data for the subchannel. */
82	SUBCHNDATAFORM_96
83	} SUBCHNDATAFORM;
84
85	/**
86	* Track entry.
87	*/
88	typedef struct TRACK
89	{
90	/** Start LBA of the track. */
91	int64_t iLbaStart;
92	/** Number of sectors in the track. */
93	uint32_t cSectors;
94	/** Data form of main data. */
95	TRACKDATAFORM enmMainDataForm;
96	/** Data form of sub channel. */
97	SUBCHNDATAFORM enmSubChnDataForm;
98	/** Flags for the track. */
99	uint32_t fFlags;
100	} TRACK, *PTRACK;
101
102	/**
103	* Media track list.
104	*/
105	typedef struct TRACKLIST
106	{
107	/** Number of detected tracks of the current medium. */
108	unsigned cTracksCurrent;
109	/** Maximum number of tracks the list can contain. */
110	unsigned cTracksMax;
111	/** Variable list of tracks. */
112	PTRACK paTracks;
113	} TRACKLIST, *PTRACKLIST;
114
115
116	/**
117	* Reallocate the given track list to be able to hold the given number of tracks.
118	*
119	* @returns VBox status code.
120	* @param pTrackList The track list to reallocate.
121	* @param cTracks Number of tracks the list must be able to hold.
122	* @param fFlags Flags for the reallocation.
123	*/
124	static int atapiTrackListReallocate(PTRACKLIST pTrackList, unsigned cTracks, uint32_t fFlags)
125	{
126	int rc = VINF_SUCCESS;
127
128	if (!(fFlags & ATAPI_TRACK_LIST_REALLOCATE_FLAGS_DONT_CLEAR))
129	ATAPIPassthroughTrackListClear(pTrackList);
130
131	if (pTrackList->cTracksMax < cTracks)
132	{
133	PTRACK paTracksNew = (PTRACK)RTMemRealloc(pTrackList->paTracks, cTracks * sizeof(TRACK));
134	if (paTracksNew)
135	{
136	pTrackList->paTracks = paTracksNew;
137
138	/* Mark new tracks as undetected. */
139	for (unsigned i = pTrackList->cTracksMax; i < cTracks; i++)
140	pTrackList->paTracks[i].fFlags \|= TRACK_FLAGS_UNDETECTED;
141
142	pTrackList->cTracksMax = cTracks;
143	}
144	else
145	rc = VERR_NO_MEMORY;
146	}
147
148	if (RT_SUCCESS(rc))
149	pTrackList->cTracksCurrent = cTracks;
150
151	return rc;
152	}
153
154	/**
155	* Initilizes the given track from the given CUE sheet entry.
156	*
157	* @returns nothing.
158	* @param pTrack The track to initialize.
159	* @param pbCueSheetEntry CUE sheet entry to use.
160	*/
161	static void atapiTrackListEntryCreateFromCueSheetEntry(PTRACK pTrack, const uint8_t *pbCueSheetEntry)
162	{
163	TRACKDATAFORM enmTrackDataForm = TRACKDATAFORM_INVALID;
164	SUBCHNDATAFORM enmSubChnDataForm = SUBCHNDATAFORM_INVALID;
165
166	/* Determine size of main data based on the data form field. */
167	switch (pbCueSheetEntry[3] & 0x3f)
168	{
169	case 0x00: /* CD-DA with data. */
170	enmTrackDataForm = TRACKDATAFORM_CDDA;
171	break;
172	case 0x01: /* CD-DA without data (used for pauses between tracks). */
173	enmTrackDataForm = TRACKDATAFORM_CDDA_PAUSE;
174	break;
175	case 0x10: /* CD-ROM mode 1 */
176	case 0x12:
177	enmTrackDataForm = TRACKDATAFORM_MODE1_2048;
178	break;
179	case 0x11:
180	case 0x13:
181	enmTrackDataForm = TRACKDATAFORM_MODE1_2352;
182	break;
183	case 0x14:
184	enmTrackDataForm = TRACKDATAFORM_MODE1_0;
185	break;
186	case 0x20: /* CD-ROM XA, CD-I */
187	case 0x22:
188	enmTrackDataForm = TRACKDATAFORM_XA_2336;
189	break;
190	case 0x21:
191	case 0x23:
192	enmTrackDataForm = TRACKDATAFORM_XA_2352;
193	break;
194	case 0x24:
195	enmTrackDataForm = TRACKDATAFORM_XA_0;
196	break;
197	case 0x31: /* CD-ROM Mode 2 */
198	case 0x33:
199	enmTrackDataForm = TRACKDATAFORM_MODE2_2352;
200	break;
201	case 0x30:
202	case 0x32:
203	enmTrackDataForm = TRACKDATAFORM_MODE2_2336;
204	break;
205	case 0x34:
206	enmTrackDataForm = TRACKDATAFORM_MODE2_0;
207	break;
208	default: /* Reserved, invalid mode. Log and leave default sector size. */
209	LogRel(("ATA: Invalid data form mode %d for current CUE sheet\n",
210	pbCueSheetEntry[3] & 0x3f));
211	}
212
213	/* Determine size of sub channel data based on data form field. */
214	switch ((pbCueSheetEntry[3] & 0xc0) >> 6)
215	{
216	case 0x00: /* Sub channel all zeroes, autogenerated by the drive. */
217	enmSubChnDataForm = SUBCHNDATAFORM_0;
218	break;
219	case 0x01:
220	case 0x03:
221	enmSubChnDataForm = SUBCHNDATAFORM_96;
222	break;
223	default:
224	LogRel(("ATA: Invalid sub-channel data form mode %u for current CUE sheet\n",
225	pbCueSheetEntry[3] & 0xc0));
226	}
227
228	pTrack->enmMainDataForm = enmTrackDataForm;
229	pTrack->enmSubChnDataForm = enmSubChnDataForm;
230	pTrack->iLbaStart = scsiMSF2LBA(&pbCueSheetEntry[5]);
231	if (pbCueSheetEntry[1] != 0xaa)
232	{
233	/* Calculate number of sectors from the next entry. */
234	int64_t iLbaNext = scsiMSF2LBA(&pbCueSheetEntry[5+8]);
235	pTrack->cSectors = iLbaNext - pTrack->iLbaStart;
236	}
237	else
238	{
239	pTrack->fFlags \|= TRACK_FLAGS_LEAD_OUT;
240	pTrack->cSectors = 0;
241	}
242	pTrack->fFlags &= ~TRACK_FLAGS_UNDETECTED;
243	}
244
245	/**
246	* Update the track list from a SEND CUE SHEET request.
247	*
248	* @returns VBox status code.
249	* @param pTrackList Track list to update.
250	* @param pbCDB CDB of the SEND CUE SHEET request.
251	* @param pvBuf The CUE sheet.
252	* @param cbBuf The buffer size (max).
253	*/
254	static int atapiTrackListUpdateFromSendCueSheet(PTRACKLIST pTrackList, const uint8_t pbCDB, const void pvBuf, size_t cbBuf)
255	{
256	int rc;
257	unsigned cbCueSheet = scsiBE2H_U24(pbCDB + 6);
258	unsigned cTracks = cbCueSheet / 8;
259
260	AssertReturn(cbCueSheet % 8 == 0 && cTracks, VERR_INVALID_PARAMETER);
261
262	rc = atapiTrackListReallocate(pTrackList, cTracks, 0);
263	if (RT_SUCCESS(rc))
264	{
265	const uint8_t pbCueSheet = (uint8_t )pvBuf;
266	PTRACK pTrack = pTrackList->paTracks;
267	AssertLogRelReturn(cTracks <= cbBuf, VERR_BUFFER_OVERFLOW);
268
269	for (unsigned i = 0; i < cTracks; i++)
270	{
271	atapiTrackListEntryCreateFromCueSheetEntry(pTrack, pbCueSheet);
272	if (i == 0)
273	pTrack->fFlags \|= TRACK_FLAGS_LEAD_IN;
274	pTrack++;
275	pbCueSheet += 8;
276	}
277	}
278
279	return rc;
280	}
281
282	static int atapiTrackListUpdateFromSendDvdStructure(PTRACKLIST pTrackList, const uint8_t pbCDB, const void pvBuf, size_t cbBuf)
283	{
284	RT_NOREF(pTrackList, pbCDB, pvBuf, cbBuf);
285	return VERR_NOT_IMPLEMENTED;
286	}
287
288	/**
289	* Update track list from formatted TOC data.
290	*
291	* @returns VBox status code.
292	* @param pTrackList The track list to update.
293	* @param iTrack The first track the TOC has data for.
294	* @param fMSF Flag whether block addresses are in MSF or LBA format.
295	* @param pbBuf Buffer holding the formatted TOC.
296	* @param cbBuffer Size of the buffer.
297	*/
298	static int atapiTrackListUpdateFromFormattedToc(PTRACKLIST pTrackList, uint8_t iTrack,
299	bool fMSF, const uint8_t *pbBuf, uint32_t cbBuffer)
300	{
301	RT_NOREF(iTrack, cbBuffer); /** @todo unused parameters */
302	int rc;
303	unsigned cbToc = scsiBE2H_U16(pbBuf);
304	uint8_t iTrackFirst = pbBuf[2];
305	unsigned cTracks;
306
307	cbToc -= 2;
308	pbBuf += 4;
309	AssertReturn(cbToc % 8 == 0, VERR_INVALID_PARAMETER);
310
311	cTracks = cbToc / 8 + iTrackFirst;
312
313	rc = atapiTrackListReallocate(pTrackList, iTrackFirst + cTracks, ATAPI_TRACK_LIST_REALLOCATE_FLAGS_DONT_CLEAR);
314	if (RT_SUCCESS(rc))
315	{
316	PTRACK pTrack = &pTrackList->paTracks[iTrackFirst];
317
318	for (unsigned i = iTrackFirst; i < cTracks; i++)
319	{
320	if (pbBuf[1] & 0x4)
321	pTrack->enmMainDataForm = TRACKDATAFORM_MODE1_2048;
322	else
323	pTrack->enmMainDataForm = TRACKDATAFORM_CDDA;
324
325	pTrack->enmSubChnDataForm = SUBCHNDATAFORM_0;
326	if (fMSF)
327	pTrack->iLbaStart = scsiMSF2LBA(&pbBuf[4]);
328	else
329	pTrack->iLbaStart = scsiBE2H_U32(&pbBuf[4]);
330
331	if (pbBuf[2] != 0xaa)
332	{
333	/* Calculate number of sectors from the next entry. */
334	int64_t iLbaNext;
335
336	if (fMSF)
337	iLbaNext = scsiMSF2LBA(&pbBuf[4+8]);
338	else
339	iLbaNext = scsiBE2H_U32(&pbBuf[4+8]);
340
341	pTrack->cSectors = iLbaNext - pTrack->iLbaStart;
342	}
343	else
344	pTrack->cSectors = 0;
345
346	pTrack->fFlags &= ~TRACK_FLAGS_UNDETECTED;
347	pbBuf += 8;
348	pTrack++;
349	}
350	}
351
352	return rc;
353	}
354
355	static int atapiTrackListUpdateFromReadTocPmaAtip(PTRACKLIST pTrackList, const uint8_t pbCDB, const void pvBuf, size_t cbBuf)
356	{
357	int rc;
358	uint16_t cbBuffer = (uint16_t)RT_MIN(scsiBE2H_U16(&pbCDB[7]), cbBuf);
359	bool fMSF = (pbCDB[1] & 0x2) != 0;
360	uint8_t uFmt = pbCDB[2] & 0xf;
361	uint8_t iTrack = pbCDB[6];
362
363	switch (uFmt)
364	{
365	case 0x00:
366	rc = atapiTrackListUpdateFromFormattedToc(pTrackList, iTrack, fMSF, (uint8_t *)pvBuf, cbBuffer);
367	break;
368	case 0x01:
369	case 0x02:
370	case 0x03:
371	case 0x04:
372	rc = VERR_NOT_IMPLEMENTED;
373	break;
374	case 0x05:
375	rc = VINF_SUCCESS; /* Does not give information about the tracklist. */
376	break;
377	default:
378	rc = VERR_INVALID_PARAMETER;
379	}
380
381	return rc;
382	}
383
384	static int atapiTrackListUpdateFromReadTrackInformation(PTRACKLIST pTrackList, const uint8_t *pbCDB,
385	const void *pvBuf, size_t cbBuf)
386	{
387	RT_NOREF(pTrackList, pbCDB, pvBuf, cbBuf);
388	return VERR_NOT_IMPLEMENTED;
389	}
390
391	static int atapiTrackListUpdateFromReadDvdStructure(PTRACKLIST pTrackList, const uint8_t *pbCDB,
392	const void *pvBuf, size_t cbBuf)
393	{
394	RT_NOREF(pTrackList, pbCDB, pvBuf, cbBuf);
395	return VERR_NOT_IMPLEMENTED;
396	}
397
398	static int atapiTrackListUpdateFromReadDiscInformation(PTRACKLIST pTrackList, const uint8_t *pbCDB,
399	const void *pvBuf, size_t cbBuf)
400	{
401	RT_NOREF(pTrackList, pbCDB, pvBuf, cbBuf);
402	return VERR_NOT_IMPLEMENTED;
403	}
404
405	#ifdef LOG_ENABLED
406
407	/**
408	* Converts the given track data form to a string.
409	*
410	* @returns Track data form as a string.
411	* @param enmTrackDataForm The track main data form.
412	*/
413	static const char *atapiTrackListMainDataFormToString(TRACKDATAFORM enmTrackDataForm)
414	{
415	switch (enmTrackDataForm)
416	{
417	case TRACKDATAFORM_CDDA:
418	return "CD-DA";
419	case TRACKDATAFORM_CDDA_PAUSE:
420	return "CD-DA Pause";
421	case TRACKDATAFORM_MODE1_2048:
422	return "Mode 1 (2048 bytes)";
423	case TRACKDATAFORM_MODE1_2352:
424	return "Mode 1 (2352 bytes)";
425	case TRACKDATAFORM_MODE1_0:
426	return "Mode 1 (0 bytes)";
427	case TRACKDATAFORM_XA_2336:
428	return "XA (2336 bytes)";
429	case TRACKDATAFORM_XA_2352:
430	return "XA (2352 bytes)";
431	case TRACKDATAFORM_XA_0:
432	return "XA (0 bytes)";
433	case TRACKDATAFORM_MODE2_2336:
434	return "Mode 2 (2336 bytes)";
435	case TRACKDATAFORM_MODE2_2352:
436	return "Mode 2 (2352 bytes)";
437	case TRACKDATAFORM_MODE2_0:
438	return "Mode 2 (0 bytes)";
439	case TRACKDATAFORM_INVALID:
440	default:
441	return "Invalid";
442	}
443	}
444
445	/**
446	* Converts the given subchannel data form to a string.
447	*
448	* @returns Subchannel data form as a string.
449	* @param enmSubChnDataForm The subchannel main data form.
450	*/
451	static const char *atapiTrackListSubChnDataFormToString(SUBCHNDATAFORM enmSubChnDataForm)
452	{
453	switch (enmSubChnDataForm)
454	{
455	case SUBCHNDATAFORM_0:
456	return "0";
457	case SUBCHNDATAFORM_96:
458	return "96";
459	case SUBCHNDATAFORM_INVALID:
460	default:
461	return "Invalid";
462	}
463	}
464
465	/**
466	* Dump the complete track list to the release log.
467	*
468	* @returns nothing.
469	* @param pTrackList The track list to dump.
470	*/
471	static void atapiTrackListDump(PTRACKLIST pTrackList)
472	{
473	LogRel(("Track List: cTracks=%u\n", pTrackList->cTracksCurrent));
474	for (unsigned i = 0; i < pTrackList->cTracksCurrent; i++)
475	{
476	PTRACK pTrack = &pTrackList->paTracks[i];
477
478	LogRel((" Track %u: LBAStart=%lld cSectors=%u enmMainDataForm=%s enmSubChnDataForm=%s fFlags=[%s%s%s]\n",
479	i, pTrack->iLbaStart, pTrack->cSectors, atapiTrackListMainDataFormToString(pTrack->enmMainDataForm),
480	atapiTrackListSubChnDataFormToString(pTrack->enmSubChnDataForm),
481	pTrack->fFlags & TRACK_FLAGS_UNDETECTED ? "UNDETECTED " : "",
482	pTrack->fFlags & TRACK_FLAGS_LEAD_IN ? "Lead-In " : "",
483	pTrack->fFlags & TRACK_FLAGS_LEAD_OUT ? "Lead-Out" : ""));
484	}
485	}
486
487	#endif /* LOG_ENABLED */
488
489	/**
490	* Creates an empty track list handle.
491	*
492	* @returns VBox status code.
493	* @param ppTrackList Where to store the track list handle on success.
494	*/
495	DECLHIDDEN(int) ATAPIPassthroughTrackListCreateEmpty(PTRACKLIST *ppTrackList)
496	{
497	PTRACKLIST pTrackList = (PTRACKLIST)RTMemAllocZ(sizeof(TRACKLIST));
498	if (pTrackList)
499	{
500	*ppTrackList = pTrackList;
501	return VINF_SUCCESS;
502	}
503	return VERR_NO_MEMORY;
504	}
505
506	/**
507	* Destroys the allocated task list handle.
508	*
509	* @returns nothing.
510	* @param pTrackList The track list handle to destroy.
511	*/
512	DECLHIDDEN(void) ATAPIPassthroughTrackListDestroy(PTRACKLIST pTrackList)
513	{
514	if (pTrackList->paTracks)
515	RTMemFree(pTrackList->paTracks);
516	RTMemFree(pTrackList);
517	}
518
519	/**
520	* Clears all tracks from the given task list.
521	*
522	* @returns nothing.
523	* @param pTrackList The track list to clear.
524	*/
525	DECLHIDDEN(void) ATAPIPassthroughTrackListClear(PTRACKLIST pTrackList)
526	{
527	AssertPtrReturnVoid(pTrackList);
528
529	pTrackList->cTracksCurrent = 0;
530
531	/* Mark all tracks as undetected. */
532	for (unsigned i = 0; i < pTrackList->cTracksMax; i++)
533	pTrackList->paTracks[i].fFlags \|= TRACK_FLAGS_UNDETECTED;
534	}
535
536	/**
537	* Updates the track list from the given CDB and data buffer.
538	*
539	* @returns VBox status code.
540	* @param pTrackList The track list to update.
541	* @param pCDB The CDB buffer.
542	* @param pvBuf The data buffer.
543	* @param cbBuf The buffer isze.
544	*/
545	DECLHIDDEN(int) ATAPIPassthroughTrackListUpdate(PTRACKLIST pTrackList, const uint8_t pbCDB, const void pvBuf, size_t cbBuf)
546	{
547	int rc;
548
549	switch (pbCDB[0])
550	{
551	case SCSI_SEND_CUE_SHEET:
552	rc = atapiTrackListUpdateFromSendCueSheet(pTrackList, pbCDB, pvBuf, cbBuf);
553	break;
554	case SCSI_SEND_DVD_STRUCTURE:
555	rc = atapiTrackListUpdateFromSendDvdStructure(pTrackList, pbCDB, pvBuf, cbBuf);
556	break;
557	case SCSI_READ_TOC_PMA_ATIP:
558	rc = atapiTrackListUpdateFromReadTocPmaAtip(pTrackList, pbCDB, pvBuf, cbBuf);
559	break;
560	case SCSI_READ_TRACK_INFORMATION:
561	rc = atapiTrackListUpdateFromReadTrackInformation(pTrackList, pbCDB, pvBuf, cbBuf);
562	break;
563	case SCSI_READ_DVD_STRUCTURE:
564	rc = atapiTrackListUpdateFromReadDvdStructure(pTrackList, pbCDB, pvBuf, cbBuf);
565	break;
566	case SCSI_READ_DISC_INFORMATION:
567	rc = atapiTrackListUpdateFromReadDiscInformation(pTrackList, pbCDB, pvBuf, cbBuf);
568	break;
569	default:
570	LogRel(("ATAPI: Invalid opcode %#x while determining media layout\n", pbCDB[0]));
571	rc = VERR_INVALID_PARAMETER;
572	}
573
574	#ifdef LOG_ENABLED
575	atapiTrackListDump(pTrackList);
576	#endif
577
578	return rc;
579	}
580
581	/**
582	* Return the sector size from the track matching the LBA in the given track list.
583	*
584	* @returns Sector size.
585	* @param pTrackList The track list to use.
586	* @param iAtapiLba The start LBA to get the sector size for.
587	*/
588	DECLHIDDEN(uint32_t) ATAPIPassthroughTrackListGetSectorSizeFromLba(PTRACKLIST pTrackList, uint32_t iAtapiLba)
589	{
590	PTRACK pTrack = NULL;
591	uint32_t cbAtapiSector = 2048;
592
593	if (pTrackList->cTracksCurrent)
594	{
595	if ( iAtapiLba > UINT32_C(0xffff4fa1)
596	&& (int32_t)iAtapiLba < -150)
597	{
598	/* Lead-In area, this is always the first entry in the cue sheet. */
599	pTrack = pTrackList->paTracks;
600	Assert(pTrack->fFlags & TRACK_FLAGS_LEAD_IN);
601	LogFlowFunc(("Selected Lead-In area\n"));
602	}
603	else
604	{
605	int64_t iAtapiLba64 = (int32_t)iAtapiLba;
606	pTrack = &pTrackList->paTracks[1];
607
608	/* Go through the track list and find the correct entry. */
609	for (unsigned i = 1; i < pTrackList->cTracksCurrent - 1; i++)
610	{
611	if (pTrack->fFlags & TRACK_FLAGS_UNDETECTED)
612	continue;
613
614	if ( pTrack->iLbaStart <= iAtapiLba64
615	&& iAtapiLba64 < pTrack->iLbaStart + pTrack->cSectors)
616	break;
617
618	pTrack++;
619	}
620	}
621
622	if (pTrack)
623	{
624	switch (pTrack->enmMainDataForm)
625	{
626	case TRACKDATAFORM_CDDA:
627	case TRACKDATAFORM_MODE1_2352:
628	case TRACKDATAFORM_XA_2352:
629	case TRACKDATAFORM_MODE2_2352:
630	cbAtapiSector = 2352;
631	break;
632	case TRACKDATAFORM_MODE1_2048:
633	cbAtapiSector = 2048;
634	break;
635	case TRACKDATAFORM_CDDA_PAUSE:
636	case TRACKDATAFORM_MODE1_0:
637	case TRACKDATAFORM_XA_0:
638	case TRACKDATAFORM_MODE2_0:
639	cbAtapiSector = 0;
640	break;
641	case TRACKDATAFORM_XA_2336:
642	case TRACKDATAFORM_MODE2_2336:
643	cbAtapiSector = 2336;
644	break;
645	case TRACKDATAFORM_INVALID:
646	default:
647	AssertMsgFailed(("Invalid track data form %d\n", pTrack->enmMainDataForm));
648	}
649
650	switch (pTrack->enmSubChnDataForm)
651	{
652	case SUBCHNDATAFORM_0:
653	break;
654	case SUBCHNDATAFORM_96:
655	cbAtapiSector += 96;
656	break;
657	case SUBCHNDATAFORM_INVALID:
658	default:
659	AssertMsgFailed(("Invalid subchannel data form %d\n", pTrack->enmSubChnDataForm));
660	}
661	}
662	}
663
664	return cbAtapiSector;
665	}
666
667
668	static uint8_t atapiPassthroughCmdErrorSimple(uint8_t *pbSense, size_t cbSense, uint8_t uATAPISenseKey, uint8_t uATAPIASC)
669	{
670	memset(pbSense, '\0', cbSense);
671	if (RT_LIKELY(cbSense >= 13))
672	{
673	pbSense[0] = 0x70 \| (1 << 7);
674	pbSense[2] = uATAPISenseKey & 0x0f;
675	pbSense[7] = 10;
676	pbSense[12] = uATAPIASC;
677	}
678	return SCSI_STATUS_CHECK_CONDITION;
679	}
680
681
682	/**
683	* Parses the given CDB and returns whether it is safe to pass it through to the host drive.
684	*
685	* @returns Flag whether passing the CDB through to the host drive is safe.
686	* @param pbCdb The CDB to parse.
687	* @param cbCdb Size of the CDB in bytes.
688	* @param cbBuf Size of the guest buffer.
689	* @param pTrackList The track list for the current medium if available (optional).
690	* @param pbSense Pointer to the sense buffer.
691	* @param cbSense Size of the sense buffer.
692	* @param penmTxDir Where to store the transfer direction (guest to host or vice versa).
693	* @param pcbXfer Where to store the transfer size encoded in the CDB.
694	* @param pcbSector Where to store the sector size used for the transfer.
695	* @param pu8ScsiSts Where to store the SCSI status code.
696	*/
697	DECLHIDDEN(bool) ATAPIPassthroughParseCdb(const uint8_t *pbCdb, size_t cbCdb, size_t cbBuf,
698	PTRACKLIST pTrackList, uint8_t *pbSense, size_t cbSense,
699	PDMMEDIATXDIR penmTxDir, size_t pcbXfer,
700	size_t pcbSector, uint8_t pu8ScsiSts)
701	{
702	uint32_t uLba = 0;
703	uint32_t cSectors = 0;
704	size_t cbSector = 0;
705	size_t cbXfer = 0;
706	bool fPassthrough = false;
707	PDMMEDIATXDIR enmTxDir = PDMMEDIATXDIR_NONE;
708
709	RT_NOREF(cbCdb);
710
711	switch (pbCdb[0])
712	{
713	/* First the commands we can pass through without further processing. */
714	case SCSI_BLANK:
715	case SCSI_CLOSE_TRACK_SESSION:
716	case SCSI_LOAD_UNLOAD_MEDIUM:
717	case SCSI_PAUSE_RESUME:
718	case SCSI_PLAY_AUDIO_10:
719	case SCSI_PLAY_AUDIO_12:
720	case SCSI_PLAY_AUDIO_MSF:
721	case SCSI_PREVENT_ALLOW_MEDIUM_REMOVAL:
722	case SCSI_REPAIR_TRACK:
723	case SCSI_RESERVE_TRACK:
724	case SCSI_SCAN:
725	case SCSI_SEEK_10:
726	case SCSI_SET_CD_SPEED:
727	case SCSI_SET_READ_AHEAD:
728	case SCSI_START_STOP_UNIT:
729	case SCSI_STOP_PLAY_SCAN:
730	case SCSI_SYNCHRONIZE_CACHE:
731	case SCSI_TEST_UNIT_READY:
732	case SCSI_VERIFY_10:
733	fPassthrough = true;
734	break;
735	case SCSI_ERASE_10:
736	uLba = scsiBE2H_U32(pbCdb + 2);
737	cbXfer = scsiBE2H_U16(pbCdb + 7);
738	enmTxDir = PDMMEDIATXDIR_TO_DEVICE;
739	fPassthrough = true;
740	break;
741	case SCSI_FORMAT_UNIT:
742	cbXfer = cbBuf;
743	enmTxDir = PDMMEDIATXDIR_TO_DEVICE;
744	fPassthrough = true;
745	break;
746	case SCSI_GET_CONFIGURATION:
747	cbXfer = scsiBE2H_U16(pbCdb + 7);
748	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
749	fPassthrough = true;
750	break;
751	case SCSI_GET_EVENT_STATUS_NOTIFICATION:
752	cbXfer = scsiBE2H_U16(pbCdb + 7);
753	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
754	fPassthrough = true;
755	break;
756	case SCSI_GET_PERFORMANCE:
757	cbXfer = cbBuf;
758	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
759	fPassthrough = true;
760	break;
761	case SCSI_INQUIRY:
762	cbXfer = scsiBE2H_U16(pbCdb + 3);
763	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
764	fPassthrough = true;
765	break;
766	case SCSI_MECHANISM_STATUS:
767	cbXfer = scsiBE2H_U16(pbCdb + 8);
768	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
769	fPassthrough = true;
770	break;
771	case SCSI_MODE_SELECT_10:
772	cbXfer = scsiBE2H_U16(pbCdb + 7);
773	enmTxDir = PDMMEDIATXDIR_TO_DEVICE;
774	fPassthrough = true;
775	break;
776	case SCSI_MODE_SENSE_10:
777	cbXfer = scsiBE2H_U16(pbCdb + 7);
778	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
779	fPassthrough = true;
780	break;
781	case SCSI_READ_10:
782	uLba = scsiBE2H_U32(pbCdb + 2);
783	cSectors = scsiBE2H_U16(pbCdb + 7);
784	cbSector = 2048;
785	cbXfer = cSectors * cbSector;
786	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
787	fPassthrough = true;
788	break;
789	case SCSI_READ_12:
790	uLba = scsiBE2H_U32(pbCdb + 2);
791	cSectors = scsiBE2H_U32(pbCdb + 6);
792	cbSector = 2048;
793	cbXfer = cSectors * cbSector;
794	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
795	fPassthrough = true;
796	break;
797	case SCSI_READ_BUFFER:
798	cbXfer = scsiBE2H_U24(pbCdb + 6);
799	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
800	fPassthrough = true;
801	break;
802	case SCSI_READ_BUFFER_CAPACITY:
803	cbXfer = scsiBE2H_U16(pbCdb + 7);
804	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
805	fPassthrough = true;
806	break;
807	case SCSI_READ_CAPACITY:
808	cbXfer = 8;
809	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
810	fPassthrough = true;
811	break;
812	case SCSI_READ_CD:
813	case SCSI_READ_CD_MSF:
814	{
815	/* Get sector size based on the expected sector type field. */
816	switch ((pbCdb[1] >> 2) & 0x7)
817	{
818	case 0x0: /* All types. */
819	{
820	uint32_t iLbaStart;
821
822	if (pbCdb[0] == SCSI_READ_CD)
823	iLbaStart = scsiBE2H_U32(&pbCdb[2]);
824	else
825	iLbaStart = scsiMSF2LBA(&pbCdb[3]);
826
827	if (pTrackList)
828	cbSector = ATAPIPassthroughTrackListGetSectorSizeFromLba(pTrackList, iLbaStart);
829	else
830	cbSector = 2048; /* Might be incorrect if we couldn't determine the type. */
831	break;
832	}
833	case 0x1: /* CD-DA */
834	cbSector = 2352;
835	break;
836	case 0x2: /* Mode 1 */
837	cbSector = 2048;
838	break;
839	case 0x3: /* Mode 2 formless */
840	cbSector = 2336;
841	break;
842	case 0x4: /* Mode 2 form 1 */
843	cbSector = 2048;
844	break;
845	case 0x5: /* Mode 2 form 2 */
846	cbSector = 2324;
847	break;
848	default: /* Reserved */
849	AssertMsgFailed(("Unknown sector type\n"));
850	cbSector = 0; /** @todo we should probably fail the command here already. */
851	}
852
853	if (pbCdb[0] == SCSI_READ_CD)
854	cbXfer = scsiBE2H_U24(pbCdb + 6) * cbSector;
855	else /* SCSI_READ_MSF */
856	{
857	cSectors = scsiMSF2LBA(pbCdb + 6) - scsiMSF2LBA(pbCdb + 3);
858	if (cSectors > 32)
859	cSectors = 32; /* Limit transfer size to 64~74K. Safety first. In any case this can only harm software doing CDDA extraction. */
860	cbXfer = cSectors * cbSector;
861	}
862	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
863	fPassthrough = true;
864	break;
865	}
866	case SCSI_READ_DISC_INFORMATION:
867	cbXfer = scsiBE2H_U16(pbCdb + 7);
868	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
869	fPassthrough = true;
870	break;
871	case SCSI_READ_DVD_STRUCTURE:
872	cbXfer = scsiBE2H_U16(pbCdb + 8);
873	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
874	fPassthrough = true;
875	break;
876	case SCSI_READ_FORMAT_CAPACITIES:
877	cbXfer = scsiBE2H_U16(pbCdb + 7);
878	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
879	fPassthrough = true;
880	break;
881	case SCSI_READ_SUBCHANNEL:
882	cbXfer = scsiBE2H_U16(pbCdb + 7);
883	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
884	fPassthrough = true;
885	break;
886	case SCSI_READ_TOC_PMA_ATIP:
887	cbXfer = scsiBE2H_U16(pbCdb + 7);
888	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
889	fPassthrough = true;
890	break;
891	case SCSI_READ_TRACK_INFORMATION:
892	cbXfer = scsiBE2H_U16(pbCdb + 7);
893	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
894	fPassthrough = true;
895	break;
896	case SCSI_REPORT_KEY:
897	cbXfer = scsiBE2H_U16(pbCdb + 8);
898	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
899	fPassthrough = true;
900	break;
901	case SCSI_REQUEST_SENSE:
902	cbXfer = pbCdb[4];
903	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
904	fPassthrough = true;
905	break;
906	case SCSI_SEND_CUE_SHEET:
907	cbXfer = scsiBE2H_U24(pbCdb + 6);
908	enmTxDir = PDMMEDIATXDIR_TO_DEVICE;
909	fPassthrough = true;
910	break;
911	case SCSI_SEND_DVD_STRUCTURE:
912	cbXfer = scsiBE2H_U16(pbCdb + 8);
913	enmTxDir = PDMMEDIATXDIR_TO_DEVICE;
914	fPassthrough = true;
915	break;
916	case SCSI_SEND_EVENT:
917	cbXfer = scsiBE2H_U16(pbCdb + 8);
918	enmTxDir = PDMMEDIATXDIR_TO_DEVICE;
919	fPassthrough = true;
920	break;
921	case SCSI_SEND_KEY:
922	cbXfer = scsiBE2H_U16(pbCdb + 8);
923	enmTxDir = PDMMEDIATXDIR_TO_DEVICE;
924	fPassthrough = true;
925	break;
926	case SCSI_SEND_OPC_INFORMATION:
927	cbXfer = scsiBE2H_U16(pbCdb + 7);
928	enmTxDir = PDMMEDIATXDIR_TO_DEVICE;
929	fPassthrough = true;
930	break;
931	case SCSI_SET_STREAMING:
932	cbXfer = scsiBE2H_U16(pbCdb + 9);
933	enmTxDir = PDMMEDIATXDIR_TO_DEVICE;
934	fPassthrough = true;
935	break;
936	case SCSI_WRITE_10:
937	case SCSI_WRITE_AND_VERIFY_10:
938	uLba = scsiBE2H_U32(pbCdb + 2);
939	cSectors = scsiBE2H_U16(pbCdb + 7);
940	if (pTrackList)
941	cbSector = ATAPIPassthroughTrackListGetSectorSizeFromLba(pTrackList, uLba);
942	else
943	cbSector = 2048;
944	cbXfer = cSectors * cbSector;
945	enmTxDir = PDMMEDIATXDIR_TO_DEVICE;
946	fPassthrough = true;
947	break;
948	case SCSI_WRITE_12:
949	uLba = scsiBE2H_U32(pbCdb + 2);
950	cSectors = scsiBE2H_U32(pbCdb + 6);
951	if (pTrackList)
952	cbSector = ATAPIPassthroughTrackListGetSectorSizeFromLba(pTrackList, uLba);
953	else
954	cbSector = 2048;
955	cbXfer = cSectors * cbSector;
956	enmTxDir = PDMMEDIATXDIR_TO_DEVICE;
957	fPassthrough = true;
958	break;
959	case SCSI_WRITE_BUFFER:
960	switch (pbCdb[1] & 0x1f)
961	{
962	case 0x04: /* download microcode */
963	case 0x05: /* download microcode and save */
964	case 0x06: /* download microcode with offsets */
965	case 0x07: /* download microcode with offsets and save */
966	case 0x0e: /* download microcode with offsets and defer activation */
967	case 0x0f: /* activate deferred microcode */
968	LogRel(("ATAPI: CD-ROM passthrough command attempted to update firmware, blocked\n"));
969	*pu8ScsiSts = atapiPassthroughCmdErrorSimple(pbSense, cbSense, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_INV_FIELD_IN_CMD_PACKET);
970	break;
971	default:
972	cbXfer = scsiBE2H_U16(pbCdb + 6);
973	enmTxDir = PDMMEDIATXDIR_TO_DEVICE;
974	fPassthrough = true;
975	break;
976	}
977	break;
978	case SCSI_REPORT_LUNS: /* Not part of MMC-3, but used by Windows. */
979	cbXfer = scsiBE2H_U32(pbCdb + 6);
980	enmTxDir = PDMMEDIATXDIR_FROM_DEVICE;
981	fPassthrough = true;
982	break;
983	case SCSI_REZERO_UNIT:
984	/* Obsolete command used by cdrecord. What else would one expect?
985	* This command is not sent to the drive, it is handled internally,
986	* as the Linux kernel doesn't like it (message "scsi: unknown
987	* opcode 0x01" in syslog) and replies with a sense code of 0,
988	* which sends cdrecord to an endless loop. */
989	*pu8ScsiSts = atapiPassthroughCmdErrorSimple(pbSense, cbSense, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_OPCODE);
990	break;
991	default:
992	LogRel(("ATAPI: Passthrough unimplemented for command %#x\n", pbCdb[0]));
993	*pu8ScsiSts = atapiPassthroughCmdErrorSimple(pbSense, cbSense, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_OPCODE);
994	break;
995	}
996
997	if (fPassthrough)
998	{
999	*penmTxDir = enmTxDir;
1000	*pcbXfer = cbXfer;
1001	*pcbSector = cbSector;
1002	}
1003
1004	return fPassthrough;
1005	}
1006

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source: vbox/trunk/src/VBox/Devices/Storage/ATAPIPassthrough.cpp@ 81844

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