/* $Id: DrvHostDVD.cpp 59248 2016-01-04 14:13:22Z vboxsync $ */ /** @file * DrvHostDVD - Host DVD block driver. */ /* * Copyright (C) 2006-2015 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 #define __STDC_LIMIT_MACROS #define __STDC_CONSTANT_MACROS #ifdef RT_OS_DARWIN # include # include # include # include # include # include # include # include # define USE_MEDIA_POLLING #elif defined RT_OS_LINUX # include # include /* All the following crap is apparently not necessary anymore since Linux * version 2.6.29. */ # if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29) /* This is a hack to work around conflicts between these linux kernel headers * and the GLIBC tcpip headers. They have different declarations of the 4 * standard byte order functions. */ # define _LINUX_BYTEORDER_GENERIC_H /* This is another hack for not bothering with C++ unfriendly byteswap macros. */ /* Those macros that are needed are defined in the header below. */ # include "swab.h" # endif # include # include # include # include # include # define USE_MEDIA_POLLING #elif defined(RT_OS_SOLARIS) # include # include # include # include # include # include # ifdef VBOX_WITH_SUID_WRAPPER # include # endif # include # include # include # define USE_MEDIA_POLLING #elif defined(RT_OS_WINDOWS) # pragma warning(disable : 4163) # define _interlockedbittestandset they_messed_it_up_in_winnt_h_this_time_sigh__interlockedbittestandset # define _interlockedbittestandreset they_messed_it_up_in_winnt_h_this_time_sigh__interlockedbittestandreset # define _interlockedbittestandset64 they_messed_it_up_in_winnt_h_this_time_sigh__interlockedbittestandset64 # define _interlockedbittestandreset64 they_messed_it_up_in_winnt_h_this_time_sigh__interlockedbittestandreset64 # include # include # include # pragma warning(default : 4163) # undef _interlockedbittestandset # undef _interlockedbittestandreset # undef _interlockedbittestandset64 # undef _interlockedbittestandreset64 # undef USE_MEDIA_POLLING #elif defined(RT_OS_FREEBSD) # include # include # include # include # include # define USE_MEDIA_POLLING #else # error "Unsupported Platform." #endif #include #include #include #include #include #include #include #include #include #include "VBoxDD.h" #include "DrvHostBase.h" /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ static DECLCALLBACK(int) drvHostDvdDoLock(PDRVHOSTBASE pThis, bool fLock); #ifdef VBOX_WITH_SUID_WRAPPER static int solarisCheckUserAuth(); static int solarisEnterRootMode(uid_t *pEffUserID); static int solarisExitRootMode(uid_t *pEffUserID); #endif /** @copydoc PDMIMOUNT::pfnUnmount */ static DECLCALLBACK(int) drvHostDvdUnmount(PPDMIMOUNT pInterface, bool fForce, bool fEject) { PDRVHOSTBASE pThis = PDMIMOUNT_2_DRVHOSTBASE(pInterface); RTCritSectEnter(&pThis->CritSect); /* * Validate state. */ int rc = VINF_SUCCESS; if (!pThis->fLocked || fForce) { /* Unlock drive if necessary. */ if (pThis->fLocked) drvHostDvdDoLock(pThis, false); if (fEject) { /* * Eject the disc. */ #if defined(RT_OS_DARWIN) || defined(RT_OS_FREEBSD) uint8_t abCmd[16] = { SCSI_START_STOP_UNIT, 0, 0, 0, 2 /*eject+stop*/, 0, 0,0,0,0,0,0,0,0,0,0 }; rc = DRVHostBaseScsiCmd(pThis, abCmd, 6, PDMMEDIATXDIR_NONE, NULL, NULL, NULL, 0, 0); #elif defined(RT_OS_LINUX) rc = ioctl(RTFileToNative(pThis->hFileDevice), CDROMEJECT, 0); if (rc < 0) { if (errno == EBUSY) rc = VERR_PDM_MEDIA_LOCKED; else if (errno == ENOSYS) rc = VERR_NOT_SUPPORTED; else rc = RTErrConvertFromErrno(errno); } #elif defined(RT_OS_SOLARIS) rc = ioctl(RTFileToNative(pThis->hFileRawDevice), DKIOCEJECT, 0); if (rc < 0) { if (errno == EBUSY) rc = VERR_PDM_MEDIA_LOCKED; else if (errno == ENOSYS || errno == ENOTSUP) rc = VERR_NOT_SUPPORTED; else if (errno == ENODEV) rc = VERR_PDM_MEDIA_NOT_MOUNTED; else rc = RTErrConvertFromErrno(errno); } #elif defined(RT_OS_WINDOWS) RTFILE hFileDevice = pThis->hFileDevice; if (hFileDevice == NIL_RTFILE) /* obsolete crap */ rc = RTFileOpen(&hFileDevice, pThis->pszDeviceOpen, RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_NONE); if (RT_SUCCESS(rc)) { /* do ioctl */ DWORD cbReturned; if (DeviceIoControl((HANDLE)RTFileToNative(hFileDevice), IOCTL_STORAGE_EJECT_MEDIA, NULL, 0, NULL, 0, &cbReturned, NULL)) rc = VINF_SUCCESS; else rc = RTErrConvertFromWin32(GetLastError()); /* clean up handle */ if (hFileDevice != pThis->hFileDevice) RTFileClose(hFileDevice); } else AssertMsgFailed(("Failed to open '%s' for ejecting this tray.\n", rc)); #else AssertMsgFailed(("Eject is not implemented!\n")); rc = VINF_SUCCESS; #endif } /* * Media is no longer present. */ DRVHostBaseMediaNotPresent(pThis); /** @todo This isn't thread safe! */ } else { Log(("drvHostDvdUnmount: Locked\n")); rc = VERR_PDM_MEDIA_LOCKED; } RTCritSectLeave(&pThis->CritSect); LogFlow(("drvHostDvdUnmount: returns %Rrc\n", rc)); return rc; } /** * 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) { #if defined(RT_OS_DARWIN) || defined(RT_OS_FREEBSD) uint8_t abCmd[16] = { SCSI_PREVENT_ALLOW_MEDIUM_REMOVAL, 0, 0, 0, fLock, 0, 0,0,0,0,0,0,0,0,0,0 }; int rc = DRVHostBaseScsiCmd(pThis, abCmd, 6, PDMMEDIATXDIR_NONE, NULL, NULL, NULL, 0, 0); #elif defined(RT_OS_LINUX) int rc = ioctl(RTFileToNative(pThis->hFileDevice), CDROM_LOCKDOOR, (int)fLock); if (rc < 0) { if (errno == EBUSY) rc = VERR_ACCESS_DENIED; else if (errno == EDRIVE_CANT_DO_THIS) rc = VERR_NOT_SUPPORTED; else rc = RTErrConvertFromErrno(errno); } #elif defined(RT_OS_SOLARIS) int rc = ioctl(RTFileToNative(pThis->hFileRawDevice), fLock ? DKIOCLOCK : DKIOCUNLOCK, 0); if (rc < 0) { if (errno == EBUSY) rc = VERR_ACCESS_DENIED; else if (errno == ENOTSUP || errno == ENOSYS) rc = VERR_NOT_SUPPORTED; else rc = RTErrConvertFromErrno(errno); } #elif defined(RT_OS_WINDOWS) PREVENT_MEDIA_REMOVAL PreventMediaRemoval = {fLock}; DWORD cbReturned; int rc; if (DeviceIoControl((HANDLE)RTFileToNative(pThis->hFileDevice), IOCTL_STORAGE_MEDIA_REMOVAL, &PreventMediaRemoval, sizeof(PreventMediaRemoval), NULL, 0, &cbReturned, NULL)) rc = VINF_SUCCESS; else /** @todo figure out the return codes for already locked. */ rc = RTErrConvertFromWin32(GetLastError()); #else AssertMsgFailed(("Lock/Unlock is not implemented!\n")); int rc = VINF_SUCCESS; #endif LogFlow(("drvHostDvdDoLock(, fLock=%RTbool): returns %Rrc\n", fLock, rc)); return rc; } #ifdef RT_OS_LINUX /** * Get the media size. * * @returns VBox status code. * @param pThis The instance data. * @param pcb Where to store the size. */ static DECLCALLBACK(int) drvHostDvdGetMediaSize(PDRVHOSTBASE pThis, uint64_t *pcb) { /* * Query the media size. */ /* Clear the media-changed-since-last-call-thingy just to be on the safe side. */ ioctl(RTFileToNative(pThis->hFileDevice), CDROM_MEDIA_CHANGED, CDSL_CURRENT); return RTFileSeek(pThis->hFileDevice, 0, RTFILE_SEEK_END, pcb); } #endif /* RT_OS_LINUX */ #ifdef USE_MEDIA_POLLING /** * Do media change polling. */ static DECLCALLBACK(int) drvHostDvdPoll(PDRVHOSTBASE pThis) { /* * Poll for media change. */ #if defined(RT_OS_DARWIN) || defined(RT_OS_FREEBSD) #ifdef RT_OS_DARWIN AssertReturn(pThis->ppScsiTaskDI, VERR_INTERNAL_ERROR); #endif /* * Issue a TEST UNIT READY request. */ bool fMediaChanged = false; bool fMediaPresent = false; uint8_t abCmd[16] = { SCSI_TEST_UNIT_READY, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }; uint8_t abSense[32]; int rc2 = DRVHostBaseScsiCmd(pThis, abCmd, 6, PDMMEDIATXDIR_NONE, NULL, NULL, abSense, sizeof(abSense), 0); if (RT_SUCCESS(rc2)) fMediaPresent = true; else if ( rc2 == VERR_UNRESOLVED_ERROR && abSense[2] == 6 /* unit attention */ && ( (abSense[12] == 0x29 && abSense[13] < 5 /* reset */) || (abSense[12] == 0x2a && abSense[13] == 0 /* parameters changed */) //??? || (abSense[12] == 0x3f && abSense[13] == 0 /* target operating conditions have changed */) //??? || (abSense[12] == 0x3f && abSense[13] == 2 /* changed operating definition */) //??? || (abSense[12] == 0x3f && abSense[13] == 3 /* inquiry parameters changed */) || (abSense[12] == 0x3f && abSense[13] == 5 /* device identifier changed */) ) ) { fMediaPresent = false; fMediaChanged = true; /** @todo check this media change stuff on Darwin. */ } #elif defined(RT_OS_LINUX) bool fMediaPresent = ioctl(RTFileToNative(pThis->hFileDevice), CDROM_DRIVE_STATUS, CDSL_CURRENT) == CDS_DISC_OK; #elif defined(RT_OS_SOLARIS) bool fMediaPresent = false; bool fMediaChanged = false; /* Need to pass the previous state and DKIO_NONE for the first time. */ static dkio_state s_DeviceState = DKIO_NONE; dkio_state PreviousState = s_DeviceState; int rc2 = ioctl(RTFileToNative(pThis->hFileRawDevice), DKIOCSTATE, &s_DeviceState); if (rc2 == 0) { fMediaPresent = (s_DeviceState == DKIO_INSERTED); if (PreviousState != s_DeviceState) fMediaChanged = true; } #else # error "Unsupported platform." #endif RTCritSectEnter(&pThis->CritSect); int rc = VINF_SUCCESS; if (pThis->fMediaPresent != fMediaPresent) { LogFlow(("drvHostDvdPoll: %d -> %d\n", pThis->fMediaPresent, fMediaPresent)); pThis->fMediaPresent = false; if (fMediaPresent) rc = DRVHostBaseMediaPresent(pThis); else DRVHostBaseMediaNotPresent(pThis); } else if (fMediaPresent) { /* * Poll for media change. */ #if defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD) /* taken care of above. */ #elif defined(RT_OS_LINUX) bool fMediaChanged = ioctl(RTFileToNative(pThis->hFileDevice), CDROM_MEDIA_CHANGED, CDSL_CURRENT) == 1; #else # error "Unsupported platform." #endif if (fMediaChanged) { LogFlow(("drvHostDVDMediaThread: Media changed!\n")); DRVHostBaseMediaNotPresent(pThis); rc = DRVHostBaseMediaPresent(pThis); } } RTCritSectLeave(&pThis->CritSect); return rc; } #endif /* USE_MEDIA_POLLING */ /** @copydoc PDMIMEDIA::pfnSendCmd */ static DECLCALLBACK(int) drvHostDvdSendCmd(PPDMIMEDIA pInterface, const uint8_t *pbCmd, PDMMEDIATXDIR enmTxDir, void *pvBuf, uint32_t *pcbBuf, uint8_t *pabSense, size_t cbSense, uint32_t cTimeoutMillies) { PDRVHOSTBASE pThis = PDMIMEDIA_2_DRVHOSTBASE(pInterface); int rc; LogFlow(("%s: cmd[0]=%#04x txdir=%d pcbBuf=%d timeout=%d\n", __FUNCTION__, pbCmd[0], enmTxDir, *pcbBuf, cTimeoutMillies)); #if defined(RT_OS_DARWIN) || defined(RT_OS_FREEBSD) /* * Pass the request on to the internal scsi command interface. * The command seems to be 12 bytes long, the docs a bit copy&pasty on the command length point... */ if (enmTxDir == PDMMEDIATXDIR_FROM_DEVICE) memset(pvBuf, '\0', *pcbBuf); /* we got read size, but zero it anyway. */ rc = DRVHostBaseScsiCmd(pThis, pbCmd, 12, PDMMEDIATXDIR_FROM_DEVICE, pvBuf, pcbBuf, pabSense, cbSense, cTimeoutMillies); if (rc == VERR_UNRESOLVED_ERROR) /* sense information set */ rc = VERR_DEV_IO_ERROR; #elif defined(RT_OS_LINUX) int direction; struct cdrom_generic_command cgc; switch (enmTxDir) { case PDMMEDIATXDIR_NONE: Assert(*pcbBuf == 0); direction = CGC_DATA_NONE; break; case PDMMEDIATXDIR_FROM_DEVICE: Assert(*pcbBuf != 0); Assert(*pcbBuf <= SCSI_MAX_BUFFER_SIZE); /* Make sure that the buffer is clear for commands reading * data. The actually received data may be shorter than what * we expect, and due to the unreliable feedback about how much * data the ioctl actually transferred, it's impossible to * prevent that. Returning previous buffer contents may cause * security problems inside the guest OS, if users can issue * commands to the CDROM device. */ memset(pThis->pbDoubleBuffer, '\0', *pcbBuf); direction = CGC_DATA_READ; break; case PDMMEDIATXDIR_TO_DEVICE: Assert(*pcbBuf != 0); Assert(*pcbBuf <= SCSI_MAX_BUFFER_SIZE); memcpy(pThis->pbDoubleBuffer, pvBuf, *pcbBuf); direction = CGC_DATA_WRITE; break; default: AssertMsgFailed(("enmTxDir invalid!\n")); direction = CGC_DATA_NONE; } memset(&cgc, '\0', sizeof(cgc)); memcpy(cgc.cmd, pbCmd, CDROM_PACKET_SIZE); cgc.buffer = (unsigned char *)pThis->pbDoubleBuffer; cgc.buflen = *pcbBuf; cgc.stat = 0; Assert(cbSense >= sizeof(struct request_sense)); cgc.sense = (struct request_sense *)pabSense; cgc.data_direction = direction; cgc.quiet = false; cgc.timeout = cTimeoutMillies; rc = ioctl(RTFileToNative(pThis->hFileDevice), CDROM_SEND_PACKET, &cgc); if (rc < 0) { if (errno == EBUSY) rc = VERR_PDM_MEDIA_LOCKED; else if (errno == ENOSYS) rc = VERR_NOT_SUPPORTED; else { rc = RTErrConvertFromErrno(errno); if (rc == VERR_ACCESS_DENIED && cgc.sense->sense_key == SCSI_SENSE_NONE) cgc.sense->sense_key = SCSI_SENSE_ILLEGAL_REQUEST; Log2(("%s: error status %d, rc=%Rrc\n", __FUNCTION__, cgc.stat, rc)); } } switch (enmTxDir) { case PDMMEDIATXDIR_FROM_DEVICE: memcpy(pvBuf, pThis->pbDoubleBuffer, *pcbBuf); break; default: ; } Log2(("%s: after ioctl: cgc.buflen=%d txlen=%d\n", __FUNCTION__, cgc.buflen, *pcbBuf)); /* The value of cgc.buflen does not reliably reflect the actual amount * of data transferred (for packet commands with little data transfer * it's 0). So just assume that everything worked ok. */ #elif defined(RT_OS_SOLARIS) struct uscsi_cmd usc; union scsi_cdb scdb; memset(&usc, 0, sizeof(struct uscsi_cmd)); memset(&scdb, 0, sizeof(scdb)); switch (enmTxDir) { case PDMMEDIATXDIR_NONE: Assert(*pcbBuf == 0); usc.uscsi_flags = USCSI_READ; /* nothing to do */ break; case PDMMEDIATXDIR_FROM_DEVICE: Assert(*pcbBuf != 0); /* Make sure that the buffer is clear for commands reading * data. The actually received data may be shorter than what * we expect, and due to the unreliable feedback about how much * data the ioctl actually transferred, it's impossible to * prevent that. Returning previous buffer contents may cause * security problems inside the guest OS, if users can issue * commands to the CDROM device. */ memset(pvBuf, '\0', *pcbBuf); usc.uscsi_flags = USCSI_READ; break; case PDMMEDIATXDIR_TO_DEVICE: Assert(*pcbBuf != 0); usc.uscsi_flags = USCSI_WRITE; break; default: AssertMsgFailedReturn(("%d\n", enmTxDir), VERR_INTERNAL_ERROR); } usc.uscsi_flags |= USCSI_RQENABLE; usc.uscsi_rqbuf = (char *)pabSense; usc.uscsi_rqlen = cbSense; usc.uscsi_cdb = (caddr_t)&scdb; usc.uscsi_cdblen = 12; memcpy (usc.uscsi_cdb, pbCmd, usc.uscsi_cdblen); usc.uscsi_bufaddr = (caddr_t)pvBuf; usc.uscsi_buflen = *pcbBuf; usc.uscsi_timeout = (cTimeoutMillies + 999) / 1000; /* We need root privileges for user-SCSI under Solaris. */ #ifdef VBOX_WITH_SUID_WRAPPER uid_t effUserID = geteuid(); solarisEnterRootMode(&effUserID); /** @todo check return code when this really works. */ #endif rc = ioctl(RTFileToNative(pThis->hFileRawDevice), USCSICMD, &usc); #ifdef VBOX_WITH_SUID_WRAPPER solarisExitRootMode(&effUserID); #endif if (rc < 0) { if (errno == EPERM) return VERR_PERMISSION_DENIED; if (usc.uscsi_status) { rc = RTErrConvertFromErrno(errno); Log2(("%s: error status. rc=%Rrc\n", __FUNCTION__, rc)); } } Log2(("%s: after ioctl: residual buflen=%d original buflen=%d\n", __FUNCTION__, usc.uscsi_resid, usc.uscsi_buflen)); #elif defined(RT_OS_WINDOWS) int direction; struct _REQ { SCSI_PASS_THROUGH_DIRECT spt; uint8_t aSense[64]; } Req; DWORD cbReturned = 0; switch (enmTxDir) { case PDMMEDIATXDIR_NONE: direction = SCSI_IOCTL_DATA_UNSPECIFIED; break; case PDMMEDIATXDIR_FROM_DEVICE: Assert(*pcbBuf != 0); /* Make sure that the buffer is clear for commands reading * data. The actually received data may be shorter than what * we expect, and due to the unreliable feedback about how much * data the ioctl actually transferred, it's impossible to * prevent that. Returning previous buffer contents may cause * security problems inside the guest OS, if users can issue * commands to the CDROM device. */ memset(pvBuf, '\0', *pcbBuf); direction = SCSI_IOCTL_DATA_IN; break; case PDMMEDIATXDIR_TO_DEVICE: direction = SCSI_IOCTL_DATA_OUT; break; default: AssertMsgFailed(("enmTxDir invalid!\n")); direction = SCSI_IOCTL_DATA_UNSPECIFIED; } memset(&Req, '\0', sizeof(Req)); Req.spt.Length = sizeof(Req.spt); Req.spt.CdbLength = 12; memcpy(Req.spt.Cdb, pbCmd, Req.spt.CdbLength); Req.spt.DataBuffer = pvBuf; Req.spt.DataTransferLength = *pcbBuf; Req.spt.DataIn = direction; Req.spt.TimeOutValue = (cTimeoutMillies + 999) / 1000; /* Convert to seconds */ Assert(cbSense <= sizeof(Req.aSense)); Req.spt.SenseInfoLength = (UCHAR)RT_MIN(sizeof(Req.aSense), cbSense); Req.spt.SenseInfoOffset = RT_OFFSETOF(struct _REQ, aSense); if (DeviceIoControl((HANDLE)RTFileToNative(pThis->hFileDevice), IOCTL_SCSI_PASS_THROUGH_DIRECT, &Req, sizeof(Req), &Req, sizeof(Req), &cbReturned, NULL)) { if (cbReturned > RT_OFFSETOF(struct _REQ, aSense)) memcpy(pabSense, Req.aSense, cbSense); else memset(pabSense, '\0', cbSense); /* Windows shares the property of not properly reflecting the actually * transferred data size. See above. Assume that everything worked ok. * Except if there are sense information. */ rc = (pabSense[2] & 0x0f) == SCSI_SENSE_NONE ? VINF_SUCCESS : VERR_DEV_IO_ERROR; } else rc = RTErrConvertFromWin32(GetLastError()); Log2(("%s: scsistatus=%d bytes returned=%d tlength=%d\n", __FUNCTION__, Req.spt.ScsiStatus, cbReturned, Req.spt.DataTransferLength)); #else # error "Unsupported platform." #endif if (pbCmd[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])); } LogFlow(("%s: rc=%Rrc\n", __FUNCTION__, rc)); return rc; } #ifdef VBOX_WITH_SUID_WRAPPER /* These functions would have to go into a separate solaris binary with * the setuid permission set, which would run the user-SCSI ioctl and * return the value. BUT... this might be prohibitively slow. */ # ifdef RT_OS_SOLARIS /** * Checks if the current user is authorized using Solaris' role-based access control. * Made as a separate function with so that it need not be invoked each time we need * to gain root access. * * @returns VBox error code. */ static int solarisCheckUserAuth() { /* Uses Solaris' role-based access control (RBAC).*/ struct passwd *pPass = getpwuid(getuid()); if (pPass == NULL || chkauthattr("solaris.device.cdrw", pPass->pw_name) == 0) return VERR_PERMISSION_DENIED; return VINF_SUCCESS; } /** * Setuid wrapper to gain root access. * * @returns VBox error code. * @param pEffUserID Pointer to effective user ID. */ static int solarisEnterRootMode(uid_t *pEffUserID) { /* Increase privilege if required */ if (*pEffUserID != 0) { if (seteuid(0) == 0) { *pEffUserID = 0; return VINF_SUCCESS; } return VERR_PERMISSION_DENIED; } return VINF_SUCCESS; } /** * Setuid wrapper to relinquish root access. * * @returns VBox error code. * @param pEffUserID Pointer to effective user ID. */ static int solarisExitRootMode(uid_t *pEffUserID) { /* Get back to user mode. */ if (*pEffUserID == 0) { uid_t realID = getuid(); if (seteuid(realID) == 0) { *pEffUserID = realID; return VINF_SUCCESS; } return VERR_PERMISSION_DENIED; } return VINF_SUCCESS; } # endif /* RT_OS_SOLARIS */ #endif /* VBOX_WITH_SUID_WRAPPER */ /* -=-=-=-=- driver interface -=-=-=-=- */ /** @copydoc FNPDMDRVDESTRUCT */ static DECLCALLBACK(void) drvHostDvdDestruct(PPDMDRVINS pDrvIns) { #ifdef RT_OS_LINUX PDRVHOSTBASE pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTBASE); if (pThis->pbDoubleBuffer) { RTMemFree(pThis->pbDoubleBuffer); pThis->pbDoubleBuffer = NULL; } #endif return DRVHostBaseDestruct(pDrvIns); } /** * Construct a host dvd drive driver instance. * * @copydoc FNPDMDRVCONSTRUCT */ static DECLCALLBACK(int) drvHostDvdConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags) { PDRVHOSTBASE pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTBASE); LogFlow(("drvHostDvdConstruct: iInstance=%d\n", pDrvIns->iInstance)); /* * Init instance data. */ int rc = DRVHostBaseInitData(pDrvIns, pCfg, PDMMEDIATYPE_DVD); if (RT_SUCCESS(rc)) { /* * Validate configuration. */ if (CFGMR3AreValuesValid(pCfg, "Path\0Interval\0Locked\0BIOSVisible\0AttachFailError\0Passthrough\0")) { /* * Override stuff. */ #ifdef RT_OS_LINUX pThis->pbDoubleBuffer = (uint8_t *)RTMemAlloc(SCSI_MAX_BUFFER_SIZE); if (!pThis->pbDoubleBuffer) return VERR_NO_MEMORY; #endif bool fPassthrough; rc = CFGMR3QueryBool(pCfg, "Passthrough", &fPassthrough); if (RT_SUCCESS(rc) && fPassthrough) { pThis->IMedia.pfnSendCmd = drvHostDvdSendCmd; /* Passthrough requires opening the device in R/W mode. */ pThis->fReadOnlyConfig = false; #ifdef VBOX_WITH_SUID_WRAPPER /* Solaris setuid for Passthrough mode. */ rc = solarisCheckUserAuth(); if (RT_FAILURE(rc)) { Log(("DVD: solarisCheckUserAuth failed. Permission denied!\n")); return rc; } #endif /* VBOX_WITH_SUID_WRAPPER */ } pThis->IMount.pfnUnmount = drvHostDvdUnmount; pThis->pfnDoLock = drvHostDvdDoLock; #ifdef USE_MEDIA_POLLING if (!fPassthrough) pThis->pfnPoll = drvHostDvdPoll; else pThis->pfnPoll = NULL; #endif #ifdef RT_OS_LINUX pThis->pfnGetMediaSize = drvHostDvdGetMediaSize; #endif /* * 2nd init part. */ rc = DRVHostBaseInitFinish(pThis); } else { pThis->fAttachFailError = true; rc = VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES; } } if (RT_FAILURE(rc)) { if (!pThis->fAttachFailError) { /* Suppressing the attach failure error must not affect the normal * DRVHostBaseDestruct, so reset this flag below before leaving. */ pThis->fKeepInstance = true; rc = VINF_SUCCESS; } DRVHostBaseDestruct(pDrvIns); pThis->fKeepInstance = false; } 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(DRVHOSTBASE), /* 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 };