/* $Id: DrvHostDVD.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */ /** @file * DrvHostDVD - Host DVD block driver. */ /* * Copyright (C) 2006-2019 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define LOG_GROUP LOG_GROUP_DRV_HOST_DVD #include #include #include #include #include #include #include #include #include #include #include #include "VBoxDD.h" #include "DrvHostBase.h" #include "ATAPIPassthrough.h" /** ATAPI sense info size. */ #define ATAPI_SENSE_SIZE 64 /** Size of an ATAPI packet. */ #define ATAPI_PACKET_SIZE 12 /** * Host DVD driver instance data. */ typedef struct DRVHOSTDVD { /** Base drivr data. */ DRVHOSTBASE Core; /** The current tracklist of the loaded medium if passthrough is used. */ PTRACKLIST pTrackList; /** ATAPI sense data. */ uint8_t abATAPISense[ATAPI_SENSE_SIZE]; /** Flag whether to overwrite the inquiry data with our emulated settings. */ bool fInquiryOverwrite; } DRVHOSTDVD; /** Pointer to the host DVD driver instance data. */ typedef DRVHOSTDVD *PDRVHOSTDVD; /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ static uint8_t drvHostDvdCmdOK(PDRVHOSTDVD pThis) { memset(pThis->abATAPISense, '\0', sizeof(pThis->abATAPISense)); pThis->abATAPISense[0] = 0x70; pThis->abATAPISense[7] = 10; return SCSI_STATUS_OK; } static uint8_t drvHostDvdCmdError(PDRVHOSTDVD pThis, const uint8_t *pabATAPISense, size_t cbATAPISense) { Log(("%s: sense=%#x (%s) asc=%#x ascq=%#x (%s)\n", __FUNCTION__, pabATAPISense[2] & 0x0f, SCSISenseText(pabATAPISense[2] & 0x0f), pabATAPISense[12], pabATAPISense[13], SCSISenseExtText(pabATAPISense[12], pabATAPISense[13]))); memset(pThis->abATAPISense, '\0', sizeof(pThis->abATAPISense)); memcpy(pThis->abATAPISense, pabATAPISense, RT_MIN(cbATAPISense, sizeof(pThis->abATAPISense))); return SCSI_STATUS_CHECK_CONDITION; } /** @todo deprecated function - doesn't provide enough info. Replace by direct * calls to drvHostDvdCmdError() with full data. */ static uint8_t drvHostDvdCmdErrorSimple(PDRVHOSTDVD pThis, uint8_t uATAPISenseKey, uint8_t uATAPIASC) { uint8_t abATAPISense[ATAPI_SENSE_SIZE]; memset(abATAPISense, '\0', sizeof(abATAPISense)); abATAPISense[0] = 0x70 | (1 << 7); abATAPISense[2] = uATAPISenseKey & 0x0f; abATAPISense[7] = 10; abATAPISense[12] = uATAPIASC; return drvHostDvdCmdError(pThis, abATAPISense, sizeof(abATAPISense)); } /** * Parse the CDB and check whether it can be passed through safely. * * @returns Flag whether to passthrough to the device is considered safe. * @param pThis The host DVD driver instance. * @param pReq The request. * @param pbCdb The CDB to parse. * @param cbCdb Size of the CDB in bytes. * @param cbBuf Size of the guest buffer. * @param penmTxDir Where to store the transfer direction (guest to host or vice versa). * @param pcbXfer Where to store the transfer size encoded in the CDB. * @param pcbSector Where to store the sector size used for the transfer. * @param pu8ScsiSts Where to store the SCSI status code. */ static bool drvHostDvdParseCdb(PDRVHOSTDVD pThis, PDRVHOSTBASEREQ pReq, const uint8_t *pbCdb, size_t cbCdb, size_t cbBuf, PDMMEDIATXDIR *penmTxDir, size_t *pcbXfer, size_t *pcbSector, uint8_t *pu8ScsiSts) { bool fPassthrough = false; if ( pbCdb[0] == SCSI_REQUEST_SENSE && (pThis->abATAPISense[2] & 0x0f) != SCSI_SENSE_NONE) { /* Handle the command here and copy sense data over. */ void *pvBuf = NULL; int rc = drvHostBaseBufferRetain(&pThis->Core, pReq, cbBuf, false /*fWrite*/, &pvBuf); if (RT_SUCCESS(rc)) { memcpy(pvBuf, &pThis->abATAPISense[0], RT_MIN(sizeof(pThis->abATAPISense), cbBuf)); rc = drvHostBaseBufferRelease(&pThis->Core, pReq, cbBuf, false /* fWrite */, pvBuf); AssertRC(rc); drvHostDvdCmdOK(pThis); *pu8ScsiSts = SCSI_STATUS_OK; } } else fPassthrough = ATAPIPassthroughParseCdb(pbCdb, cbCdb, cbBuf, pThis->pTrackList, &pThis->abATAPISense[0], sizeof(pThis->abATAPISense), penmTxDir, pcbXfer, pcbSector, pu8ScsiSts); return fPassthrough; } /** * Locks or unlocks the drive. * * @returns VBox status code. * @param pThis The instance data. * @param fLock True if the request is to lock the drive, false if to unlock. */ static DECLCALLBACK(int) drvHostDvdDoLock(PDRVHOSTBASE pThis, bool fLock) { int rc = drvHostBaseDoLockOs(pThis, fLock); LogFlow(("drvHostDvdDoLock(, fLock=%RTbool): returns %Rrc\n", fLock, rc)); return rc; } /** @interface_method_impl{PDMIMEDIA,pfnSendCmd} */ static DECLCALLBACK(int) drvHostDvdSendCmd(PPDMIMEDIA pInterface, const uint8_t *pbCdb, size_t cbCdb, PDMMEDIATXDIR enmTxDir, void *pvBuf, uint32_t *pcbBuf, uint8_t *pabSense, size_t cbSense, uint32_t cTimeoutMillies) { PDRVHOSTBASE pThis = RT_FROM_MEMBER(pInterface, DRVHOSTBASE, IMedia); int rc; LogFlow(("%s: cmd[0]=%#04x txdir=%d pcbBuf=%d timeout=%d\n", __FUNCTION__, pbCdb[0], enmTxDir, *pcbBuf, cTimeoutMillies)); RTCritSectEnter(&pThis->CritSect); /* Pass the request on to the internal scsi command interface. */ if (enmTxDir == PDMMEDIATXDIR_FROM_DEVICE) memset(pvBuf, '\0', *pcbBuf); /* we got read size, but zero it anyway. */ rc = drvHostBaseScsiCmdOs(pThis, pbCdb, cbCdb, enmTxDir, pvBuf, pcbBuf, pabSense, cbSense, cTimeoutMillies); if (rc == VERR_UNRESOLVED_ERROR) /* sense information set */ rc = VERR_DEV_IO_ERROR; if (pbCdb[0] == SCSI_GET_EVENT_STATUS_NOTIFICATION) { uint8_t *pbBuf = (uint8_t*)pvBuf; Log2(("Event Status Notification class=%#02x supported classes=%#02x\n", pbBuf[2], pbBuf[3])); if (RT_BE2H_U16(*(uint16_t*)pbBuf) >= 6) Log2((" event %#02x %#02x %#02x %#02x\n", pbBuf[4], pbBuf[5], pbBuf[6], pbBuf[7])); } RTCritSectLeave(&pThis->CritSect); LogFlow(("%s: rc=%Rrc\n", __FUNCTION__, rc)); return rc; } /** @interface_method_impl{PDMIMEDIAEX,pfnIoReqSendScsiCmd} */ static DECLCALLBACK(int) drvHostDvdIoReqSendScsiCmd(PPDMIMEDIAEX pInterface, PDMMEDIAEXIOREQ hIoReq, uint32_t uLun, const uint8_t *pbCdb, size_t cbCdb, PDMMEDIAEXIOREQSCSITXDIR enmTxDir, size_t cbBuf, uint8_t *pabSense, size_t cbSense, uint8_t *pu8ScsiSts, uint32_t cTimeoutMillies) { RT_NOREF3(uLun, cTimeoutMillies, enmTxDir); PDRVHOSTDVD pThis = RT_FROM_MEMBER(pInterface, DRVHOSTDVD, Core.IMediaEx); PDRVHOSTBASEREQ pReq = (PDRVHOSTBASEREQ)hIoReq; int rc = VINF_SUCCESS; LogFlow(("%s: pbCdb[0]=%#04x{%s} enmTxDir=%d cbBuf=%zu timeout=%u\n", __FUNCTION__, pbCdb[0], SCSICmdText(pbCdb[0]), enmTxDir, cbBuf, cTimeoutMillies)); RTCritSectEnter(&pThis->Core.CritSect); /* * Parse the command first to fend off any illegal or dangerous commands we don't want the guest * to execute on the host drive. */ PDMMEDIATXDIR enmXferDir = PDMMEDIATXDIR_NONE; size_t cbXfer = 0; size_t cbSector = 0; size_t cbScsiCmdBufLimit = drvHostBaseScsiCmdGetBufLimitOs(&pThis->Core); bool fPassthrough = drvHostDvdParseCdb(pThis, pReq, pbCdb, cbCdb, cbBuf, &enmXferDir, &cbXfer, &cbSector, pu8ScsiSts); if (fPassthrough) { void *pvBuf = NULL; size_t cbXferCur = cbXfer; pReq->cbReq = cbXfer; pReq->cbResidual = cbXfer; if (cbXfer) rc = drvHostBaseBufferRetain(&pThis->Core, pReq, cbXfer, enmXferDir == PDMMEDIATXDIR_TO_DEVICE, &pvBuf); if (cbXfer > cbScsiCmdBufLimit) { /* Linux accepts commands with up to 100KB of data, but expects * us to handle commands with up to 128KB of data. The usual * imbalance of powers. */ uint8_t aATAPICmd[ATAPI_PACKET_SIZE]; uint32_t iATAPILBA, cSectors; uint8_t *pbBuf = (uint8_t *)pvBuf; switch (pbCdb[0]) { case SCSI_READ_10: case SCSI_WRITE_10: case SCSI_WRITE_AND_VERIFY_10: iATAPILBA = scsiBE2H_U32(pbCdb + 2); cSectors = scsiBE2H_U16(pbCdb + 7); break; case SCSI_READ_12: case SCSI_WRITE_12: iATAPILBA = scsiBE2H_U32(pbCdb + 2); cSectors = scsiBE2H_U32(pbCdb + 6); break; case SCSI_READ_CD: iATAPILBA = scsiBE2H_U32(pbCdb + 2); cSectors = scsiBE2H_U24(pbCdb + 6); break; case SCSI_READ_CD_MSF: iATAPILBA = scsiMSF2LBA(pbCdb + 3); cSectors = scsiMSF2LBA(pbCdb + 6) - iATAPILBA; break; default: AssertMsgFailed(("Don't know how to split command %#04x\n", pbCdb[0])); LogRelMax(10, ("HostDVD#%u: CD-ROM passthrough split error\n", pThis->Core.pDrvIns->iInstance)); *pu8ScsiSts = drvHostDvdCmdErrorSimple(pThis, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_OPCODE); rc = drvHostBaseBufferRelease(&pThis->Core, pReq, cbBuf, enmXferDir == PDMMEDIATXDIR_TO_DEVICE, pvBuf); RTCritSectLeave(&pThis->Core.CritSect); return VINF_SUCCESS; } memcpy(aATAPICmd, pbCdb, RT_MIN(cbCdb, ATAPI_PACKET_SIZE)); uint32_t cReqSectors = 0; for (uint32_t i = cSectors; i > 0; i -= cReqSectors) { if (i * cbSector > cbScsiCmdBufLimit) cReqSectors = (uint32_t)(cbScsiCmdBufLimit / cbSector); else cReqSectors = i; uint32_t cbCurrTX = (uint32_t)cbSector * cReqSectors; switch (pbCdb[0]) { case SCSI_READ_10: case SCSI_WRITE_10: case SCSI_WRITE_AND_VERIFY_10: scsiH2BE_U32(aATAPICmd + 2, iATAPILBA); scsiH2BE_U16(aATAPICmd + 7, cReqSectors); break; case SCSI_READ_12: case SCSI_WRITE_12: scsiH2BE_U32(aATAPICmd + 2, iATAPILBA); scsiH2BE_U32(aATAPICmd + 6, cReqSectors); break; case SCSI_READ_CD: scsiH2BE_U32(aATAPICmd + 2, iATAPILBA); scsiH2BE_U24(aATAPICmd + 6, cReqSectors); break; case SCSI_READ_CD_MSF: scsiLBA2MSF(aATAPICmd + 3, iATAPILBA); scsiLBA2MSF(aATAPICmd + 6, iATAPILBA + cReqSectors); break; } rc = drvHostBaseScsiCmdOs(&pThis->Core, aATAPICmd, sizeof(aATAPICmd), enmXferDir, pbBuf, &cbCurrTX, &pThis->abATAPISense[0], sizeof(pThis->abATAPISense), cTimeoutMillies /**< @todo timeout */); if (rc != VINF_SUCCESS) break; pReq->cbResidual -= cbCurrTX; iATAPILBA += cReqSectors; pbBuf += cbSector * cReqSectors; } } else { uint32_t cbXferTmp = (uint32_t)cbXferCur; rc = drvHostBaseScsiCmdOs(&pThis->Core, pbCdb, cbCdb, enmXferDir, pvBuf, &cbXferTmp, &pThis->abATAPISense[0], sizeof(pThis->abATAPISense), cTimeoutMillies); if (RT_SUCCESS(rc)) pReq->cbResidual -= cbXferTmp; } if (RT_SUCCESS(rc)) { /* Do post processing for certain commands. */ switch (pbCdb[0]) { case SCSI_SEND_CUE_SHEET: case SCSI_READ_TOC_PMA_ATIP: { if (!pThis->pTrackList) rc = ATAPIPassthroughTrackListCreateEmpty(&pThis->pTrackList); if (RT_SUCCESS(rc)) rc = ATAPIPassthroughTrackListUpdate(pThis->pTrackList, pbCdb, pvBuf); if (RT_FAILURE(rc)) LogRelMax(10, ("HostDVD#%u: Error (%Rrc) while updating the tracklist during %s, burning the disc might fail\n", pThis->Core.pDrvIns->iInstance, rc, pbCdb[0] == SCSI_SEND_CUE_SHEET ? "SEND CUE SHEET" : "READ TOC/PMA/ATIP")); break; } case SCSI_SYNCHRONIZE_CACHE: { if (pThis->pTrackList) ATAPIPassthroughTrackListClear(pThis->pTrackList); break; } } if (enmXferDir == PDMMEDIATXDIR_FROM_DEVICE) { Assert(cbXferCur <= cbXfer); if ( pbCdb[0] == SCSI_INQUIRY && pThis->fInquiryOverwrite) { const char *pszInqVendorId = "VBOX"; const char *pszInqProductId = "CD-ROM"; const char *pszInqRevision = "1.0"; if (pThis->Core.pDrvMediaPort->pfnQueryScsiInqStrings) { rc = pThis->Core.pDrvMediaPort->pfnQueryScsiInqStrings(pThis->Core.pDrvMediaPort, &pszInqVendorId, &pszInqProductId, &pszInqRevision); AssertRC(rc); } /* Make sure that the real drive cannot be identified. * Motivation: changing the VM configuration should be as * invisible as possible to the guest. */ if (cbXferCur >= 8 + 8) scsiPadStr((uint8_t *)pvBuf + 8, pszInqVendorId, 8); if (cbXferCur >= 16 + 16) scsiPadStr((uint8_t *)pvBuf + 16, pszInqProductId, 16); if (cbXferCur >= 32 + 4) scsiPadStr((uint8_t *)pvBuf + 32, pszInqRevision, 4); } if (cbXferCur) Log3(("ATAPI PT data read (%d): %.*Rhxs\n", cbXferCur, cbXferCur, (uint8_t *)pvBuf)); } *pu8ScsiSts = drvHostDvdCmdOK(pThis); } else { do { /* don't log superfluous errors */ if ( rc == VERR_DEV_IO_ERROR && ( pbCdb[0] == SCSI_TEST_UNIT_READY || pbCdb[0] == SCSI_READ_CAPACITY || pbCdb[0] == SCSI_READ_DVD_STRUCTURE || pbCdb[0] == SCSI_READ_TOC_PMA_ATIP)) break; LogRelMax(10, ("HostDVD#%u: CD-ROM passthrough cmd=%#04x sense=%d ASC=%#02x ASCQ=%#02x %Rrc\n", pThis->Core.pDrvIns->iInstance, pbCdb[0], pThis->abATAPISense[2] & 0x0f, pThis->abATAPISense[12], pThis->abATAPISense[13], rc)); } while (0); *pu8ScsiSts = SCSI_STATUS_CHECK_CONDITION; rc = VINF_SUCCESS; } if (cbXfer) rc = drvHostBaseBufferRelease(&pThis->Core, pReq, cbXfer, enmXferDir == PDMMEDIATXDIR_TO_DEVICE, pvBuf); } /* * We handled the command, check the status code and copy over the sense data if * it is CHECK CONDITION. */ if ( *pu8ScsiSts == SCSI_STATUS_CHECK_CONDITION && VALID_PTR(pabSense) && cbSense > 0) memcpy(pabSense, &pThis->abATAPISense[0], RT_MIN(cbSense, sizeof(pThis->abATAPISense))); RTCritSectLeave(&pThis->Core.CritSect); LogFlow(("%s: rc=%Rrc\n", __FUNCTION__, rc)); return rc; } /* -=-=-=-=- driver interface -=-=-=-=- */ /** @interface_method_impl{PDMDRVREG,pfnDestruct} */ static DECLCALLBACK(void) drvHostDvdDestruct(PPDMDRVINS pDrvIns) { PDRVHOSTDVD pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTDVD); if (pThis->pTrackList) { ATAPIPassthroughTrackListDestroy(pThis->pTrackList); pThis->pTrackList = NULL; } DRVHostBaseDestruct(pDrvIns); } /** * Construct a host dvd drive driver instance. * * @copydoc FNPDMDRVCONSTRUCT */ static DECLCALLBACK(int) drvHostDvdConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags) { RT_NOREF(fFlags); PDRVHOSTDVD pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTDVD); LogFlow(("drvHostDvdConstruct: iInstance=%d\n", pDrvIns->iInstance)); int rc = CFGMR3QueryBoolDef(pCfg, "InquiryOverwrite", &pThis->fInquiryOverwrite, true); if (RT_FAILURE(rc)) return PDMDRV_SET_ERROR(pDrvIns, rc, N_("HostDVD configuration error: failed to read \"InquiryOverwrite\" as boolean")); bool fPassthrough; rc = CFGMR3QueryBool(pCfg, "Passthrough", &fPassthrough); if (RT_SUCCESS(rc) && fPassthrough) { pThis->Core.IMedia.pfnSendCmd = drvHostDvdSendCmd; pThis->Core.IMediaEx.pfnIoReqSendScsiCmd = drvHostDvdIoReqSendScsiCmd; /* Passthrough requires opening the device in R/W mode. */ pThis->Core.fReadOnlyConfig = false; } pThis->Core.pfnDoLock = drvHostDvdDoLock; /* * Init instance data. */ rc = DRVHostBaseInit(pDrvIns, pCfg, "Path\0Interval\0Locked\0BIOSVisible\0AttachFailError\0Passthrough\0InquiryOverwrite\0", PDMMEDIATYPE_DVD); LogFlow(("drvHostDvdConstruct: returns %Rrc\n", rc)); return rc; } /** * Block driver registration record. */ const PDMDRVREG g_DrvHostDVD = { /* u32Version */ PDM_DRVREG_VERSION, /* szName */ "HostDVD", /* szRCMod */ "", /* szR0Mod */ "", /* pszDescription */ "Host DVD Block Driver.", /* fFlags */ PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT, /* fClass. */ PDM_DRVREG_CLASS_BLOCK, /* cMaxInstances */ ~0U, /* cbInstance */ sizeof(DRVHOSTDVD), /* pfnConstruct */ drvHostDvdConstruct, /* pfnDestruct */ drvHostDvdDestruct, /* pfnRelocate */ NULL, /* pfnIOCtl */ NULL, /* pfnPowerOn */ NULL, /* pfnReset */ NULL, /* pfnSuspend */ NULL, /* pfnResume */ NULL, /* pfnAttach */ NULL, /* pfnDetach */ NULL, /* pfnPowerOff */ NULL, /* pfnSoftReset */ NULL, /* u32EndVersion */ PDM_DRVREG_VERSION };