/* $Id: DrvHostBase-win.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */ /** @file * DrvHostBase - Host base drive access driver, Windows specifics. */ /* * 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_BASE #include #include #include #include #include #include #include #include /** * Host backend specific data. */ typedef struct DRVHOSTBASEOS { /** The filehandle of the device. */ RTFILE hFileDevice; /** Handle to the window we use to catch the device change broadcast messages. */ volatile HWND hwndDeviceChange; /** The unit mask. */ DWORD fUnitMask; /** Handle of the poller thread. */ RTTHREAD hThrdMediaChange; } DRVHOSTBASEOS; /** Pointer to the host backend specific data. */ typedef DRVHOSTBASEOS *PDRVHOSBASEOS; AssertCompile(sizeof(DRVHOSTBASEOS) <= 64); #define DRVHOSTBASE_OS_INT_DECLARED #include "DrvHostBase.h" /********************************************************************************************************************************* * Defined Constants And Macros * *********************************************************************************************************************************/ /** Maximum buffer size we support, check whether darwin has some real upper limit. */ #define WIN_SCSI_MAX_BUFFER_SIZE (100 * _1K) /** * Window procedure for the invisible window used to catch the WM_DEVICECHANGE broadcasts. */ static LRESULT CALLBACK DeviceChangeWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { Log2(("DeviceChangeWindowProc: hwnd=%08x uMsg=%08x\n", hwnd, uMsg)); if (uMsg == WM_DESTROY) { PDRVHOSTBASE pThis = (PDRVHOSTBASE)GetWindowLongPtr(hwnd, GWLP_USERDATA); if (pThis) ASMAtomicXchgSize(&pThis->Os.hwndDeviceChange, NULL); PostQuitMessage(0); } if (uMsg != WM_DEVICECHANGE) return DefWindowProc(hwnd, uMsg, wParam, lParam); PDEV_BROADCAST_HDR lpdb = (PDEV_BROADCAST_HDR)lParam; PDRVHOSTBASE pThis = (PDRVHOSTBASE)GetWindowLongPtr(hwnd, GWLP_USERDATA); Assert(pThis); if (pThis == NULL) return 0; switch (wParam) { case DBT_DEVICEARRIVAL: case DBT_DEVICEREMOVECOMPLETE: // Check whether a CD or DVD was inserted into or removed from a drive. if (lpdb->dbch_devicetype == DBT_DEVTYP_VOLUME) { PDEV_BROADCAST_VOLUME lpdbv = (PDEV_BROADCAST_VOLUME)lpdb; if ( (lpdbv->dbcv_flags & DBTF_MEDIA) && (pThis->Os.fUnitMask & lpdbv->dbcv_unitmask)) { RTCritSectEnter(&pThis->CritSect); if (wParam == DBT_DEVICEARRIVAL) { int cRetries = 10; int rc = DRVHostBaseMediaPresent(pThis); while (RT_FAILURE(rc) && cRetries-- > 0) { RTThreadSleep(50); rc = DRVHostBaseMediaPresent(pThis); } } else DRVHostBaseMediaNotPresent(pThis); RTCritSectLeave(&pThis->CritSect); } } break; } return TRUE; } /** * This thread will wait for changed media notificatons. * * @returns Ignored. * @param ThreadSelf Handle of this thread. Ignored. * @param pvUser Pointer to the driver instance structure. */ static DECLCALLBACK(int) drvHostBaseMediaThreadWin(RTTHREAD ThreadSelf, void *pvUser) { PDRVHOSTBASE pThis = (PDRVHOSTBASE)pvUser; LogFlow(("%s-%d: drvHostBaseMediaThreadWin: ThreadSelf=%p pvUser=%p\n", pThis->pDrvIns->pReg->szName, pThis->pDrvIns->iInstance, ThreadSelf, pvUser)); static WNDCLASS s_classDeviceChange = {0}; static ATOM s_hAtomDeviceChange = 0; /* * Register custom window class. */ if (s_hAtomDeviceChange == 0) { memset(&s_classDeviceChange, 0, sizeof(s_classDeviceChange)); s_classDeviceChange.lpfnWndProc = DeviceChangeWindowProc; s_classDeviceChange.lpszClassName = "VBOX_DeviceChangeClass"; s_classDeviceChange.hInstance = GetModuleHandle("VBoxDD.dll"); Assert(s_classDeviceChange.hInstance); s_hAtomDeviceChange = RegisterClassA(&s_classDeviceChange); Assert(s_hAtomDeviceChange); } /* * Create Window w/ the pThis as user data. */ HWND hwnd = CreateWindow((LPCTSTR)s_hAtomDeviceChange, "", WS_POPUP, 0, 0, 0, 0, 0, 0, s_classDeviceChange.hInstance, 0); AssertMsg(hwnd, ("CreateWindow failed with %d\n", GetLastError())); SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)pThis); /* * Signal the waiting EMT thread that everything went fine. */ ASMAtomicXchgPtr((void * volatile *)&pThis->Os.hwndDeviceChange, hwnd); RTThreadUserSignal(ThreadSelf); if (!hwnd) { LogFlow(("%s-%d: drvHostBaseMediaThreadWin: returns VERR_GENERAL_FAILURE\n", pThis->pDrvIns->pReg->szName, pThis->pDrvIns->iInstance)); return VERR_GENERAL_FAILURE; } LogFlow(("%s-%d: drvHostBaseMediaThreadWin: Created hwndDeviceChange=%p\n", pThis->pDrvIns->pReg->szName, pThis->pDrvIns->iInstance, hwnd)); /* * Message pump. */ MSG Msg; BOOL fRet; while ((fRet = GetMessage(&Msg, NULL, 0, 0)) != FALSE) { if (fRet != -1) { TranslateMessage(&Msg); DispatchMessage(&Msg); } //else: handle the error and possibly exit } Assert(!pThis->Os.hwndDeviceChange); /* (Don't clear the thread handle here, the destructor thread is using it to wait.) */ LogFlow(("%s-%d: drvHostBaseMediaThreadWin: returns VINF_SUCCESS\n", pThis->pDrvIns->pReg->szName, pThis->pDrvIns->iInstance)); return VINF_SUCCESS; } DECLHIDDEN(int) drvHostBaseScsiCmdOs(PDRVHOSTBASE pThis, const uint8_t *pbCmd, size_t cbCmd, PDMMEDIATXDIR enmTxDir, void *pvBuf, uint32_t *pcbBuf, uint8_t *pbSense, size_t cbSense, uint32_t cTimeoutMillies) { /* * Minimal input validation. */ Assert(enmTxDir == PDMMEDIATXDIR_NONE || enmTxDir == PDMMEDIATXDIR_FROM_DEVICE || enmTxDir == PDMMEDIATXDIR_TO_DEVICE); Assert(!pvBuf || pcbBuf); Assert(pvBuf || enmTxDir == PDMMEDIATXDIR_NONE); Assert(pbSense || !cbSense); AssertPtr(pbCmd); Assert(cbCmd <= 16 && cbCmd >= 1); RT_NOREF(cbCmd); int rc = VERR_GENERAL_FAILURE; 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_UOFFSETOF(struct _REQ, aSense); if (DeviceIoControl((HANDLE)RTFileToNative(pThis->Os.hFileDevice), IOCTL_SCSI_PASS_THROUGH_DIRECT, &Req, sizeof(Req), &Req, sizeof(Req), &cbReturned, NULL)) { if (cbReturned > RT_UOFFSETOF(struct _REQ, aSense)) memcpy(pbSense, Req.aSense, cbSense); else memset(pbSense, '\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 = (pbSense[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)); return rc; } DECLHIDDEN(size_t) drvHostBaseScsiCmdGetBufLimitOs(PDRVHOSTBASE pThis) { RT_NOREF(pThis); return WIN_SCSI_MAX_BUFFER_SIZE; } DECLHIDDEN(int) drvHostBaseGetMediaSizeOs(PDRVHOSTBASE pThis, uint64_t *pcb) { int rc = VERR_GENERAL_FAILURE; if (PDMMEDIATYPE_IS_FLOPPY(pThis->enmType)) { DISK_GEOMETRY geom; DWORD cbBytesReturned; int cbSectors; memset(&geom, 0, sizeof(geom)); rc = DeviceIoControl((HANDLE)RTFileToNative(pThis->Os.hFileDevice), IOCTL_DISK_GET_DRIVE_GEOMETRY, NULL, 0, &geom, sizeof(geom), &cbBytesReturned, NULL); if (rc) { cbSectors = geom.Cylinders.QuadPart * geom.TracksPerCylinder * geom.SectorsPerTrack; *pcb = cbSectors * geom.BytesPerSector; rc = VINF_SUCCESS; } else { DWORD dwLastError; dwLastError = GetLastError(); rc = RTErrConvertFromWin32(dwLastError); Log(("DrvHostFloppy: IOCTL_DISK_GET_DRIVE_GEOMETRY(%s) failed, LastError=%d rc=%Rrc\n", pThis->pszDevice, dwLastError, rc)); return rc; } } else { /* use NT api, retry a few times if the media is being verified. */ IO_STATUS_BLOCK IoStatusBlock = {0}; FILE_FS_SIZE_INFORMATION FsSize = {0}; NTSTATUS rcNt = NtQueryVolumeInformationFile((HANDLE)RTFileToNative(pThis->Os.hFileDevice), &IoStatusBlock, &FsSize, sizeof(FsSize), FileFsSizeInformation); int cRetries = 5; while (rcNt == STATUS_VERIFY_REQUIRED && cRetries-- > 0) { RTThreadSleep(10); rcNt = NtQueryVolumeInformationFile((HANDLE)RTFileToNative(pThis->Os.hFileDevice), &IoStatusBlock, &FsSize, sizeof(FsSize), FileFsSizeInformation); } if (rcNt >= 0) { *pcb = FsSize.TotalAllocationUnits.QuadPart * FsSize.BytesPerSector; return VINF_SUCCESS; } /* convert nt status code to VBox status code. */ /** @todo Make conversion function!. */ switch (rcNt) { case STATUS_NO_MEDIA_IN_DEVICE: rc = VERR_MEDIA_NOT_PRESENT; break; case STATUS_VERIFY_REQUIRED: rc = VERR_TRY_AGAIN; break; } LogFlow(("drvHostBaseGetMediaSize: NtQueryVolumeInformationFile -> %#lx\n", rcNt, rc)); } return rc; } DECLHIDDEN(int) drvHostBaseReadOs(PDRVHOSTBASE pThis, uint64_t off, void *pvBuf, size_t cbRead) { return RTFileReadAt(pThis->Os.hFileDevice, off, pvBuf, cbRead, NULL); } DECLHIDDEN(int) drvHostBaseWriteOs(PDRVHOSTBASE pThis, uint64_t off, const void *pvBuf, size_t cbWrite) { return RTFileWriteAt(pThis->Os.hFileDevice, off, pvBuf, cbWrite, NULL); } DECLHIDDEN(int) drvHostBaseFlushOs(PDRVHOSTBASE pThis) { return RTFileFlush(pThis->Os.hFileDevice); } DECLHIDDEN(int) drvHostBaseDoLockOs(PDRVHOSTBASE pThis, bool fLock) { PREVENT_MEDIA_REMOVAL PreventMediaRemoval = {fLock}; DWORD cbReturned; int rc; if (DeviceIoControl((HANDLE)RTFileToNative(pThis->Os.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()); return rc; } DECLHIDDEN(int) drvHostBaseEjectOs(PDRVHOSTBASE pThis) { int rc = VINF_SUCCESS; RTFILE hFileDevice = pThis->Os.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->Os.hFileDevice) RTFileClose(hFileDevice); } else AssertMsgFailed(("Failed to open '%s' for ejecting this tray.\n", rc)); return rc; } DECLHIDDEN(void) drvHostBaseInitOs(PDRVHOSTBASE pThis) { pThis->Os.hFileDevice = NIL_RTFILE; pThis->Os.hwndDeviceChange = NULL; pThis->Os.hThrdMediaChange = NIL_RTTHREAD; } DECLHIDDEN(int) drvHostBaseOpenOs(PDRVHOSTBASE pThis, bool fReadOnly) { UINT uDriveType = GetDriveType(pThis->pszDevice); switch (pThis->enmType) { case PDMMEDIATYPE_FLOPPY_360: case PDMMEDIATYPE_FLOPPY_720: case PDMMEDIATYPE_FLOPPY_1_20: case PDMMEDIATYPE_FLOPPY_1_44: case PDMMEDIATYPE_FLOPPY_2_88: case PDMMEDIATYPE_FLOPPY_FAKE_15_6: case PDMMEDIATYPE_FLOPPY_FAKE_63_5: if (uDriveType != DRIVE_REMOVABLE) { AssertMsgFailed(("Configuration error: '%s' is not a floppy (type=%d)\n", pThis->pszDevice, uDriveType)); return VERR_INVALID_PARAMETER; } break; case PDMMEDIATYPE_CDROM: case PDMMEDIATYPE_DVD: if (uDriveType != DRIVE_CDROM) { AssertMsgFailed(("Configuration error: '%s' is not a cdrom (type=%d)\n", pThis->pszDevice, uDriveType)); return VERR_INVALID_PARAMETER; } break; case PDMMEDIATYPE_HARD_DISK: default: AssertMsgFailed(("enmType=%d\n", pThis->enmType)); return VERR_INVALID_PARAMETER; } int iBit = RT_C_TO_UPPER(pThis->pszDevice[0]) - 'A'; if ( iBit > 'Z' - 'A' || pThis->pszDevice[1] != ':' || pThis->pszDevice[2]) { AssertMsgFailed(("Configuration error: Invalid drive specification: '%s'\n", pThis->pszDevice)); return VERR_INVALID_PARAMETER; } pThis->Os.fUnitMask = 1 << iBit; RTStrAPrintf(&pThis->pszDeviceOpen, "\\\\.\\%s", pThis->pszDevice); if (!pThis->pszDeviceOpen) return VERR_NO_MEMORY; uint32_t fFlags = (fReadOnly ? RTFILE_O_READ : RTFILE_O_READWRITE) | RTFILE_O_OPEN | RTFILE_O_DENY_NONE; int rc = RTFileOpen(&pThis->Os.hFileDevice, pThis->pszDeviceOpen, fFlags); if (RT_SUCCESS(rc)) { /* * Start the thread which will wait for the media change events. */ rc = RTThreadCreate(&pThis->Os.hThrdMediaChange, drvHostBaseMediaThreadWin, pThis, 0, RTTHREADTYPE_INFREQUENT_POLLER, RTTHREADFLAGS_WAITABLE, "DVDMEDIA"); if (RT_FAILURE(rc)) { AssertMsgFailed(("Failed to create poller thread. rc=%Rrc\n", rc)); return rc; } /* * Wait for the thread to start up (!w32:) and do one detection loop. */ rc = RTThreadUserWait(pThis->Os.hThrdMediaChange, 10000); AssertRC(rc); if (!pThis->Os.hwndDeviceChange) return VERR_GENERAL_FAILURE; DRVHostBaseMediaPresent(pThis); } return rc; } DECLHIDDEN(int) drvHostBaseMediaRefreshOs(PDRVHOSTBASE pThis) { RT_NOREF(pThis); return VINF_SUCCESS; } DECLHIDDEN(int) drvHostBaseQueryMediaStatusOs(PDRVHOSTBASE pThis, bool *pfMediaChanged, bool *pfMediaPresent) { RT_NOREF3(pThis, pfMediaChanged, pfMediaPresent); /* We don't support the polling method. */ return VERR_NOT_SUPPORTED; } DECLHIDDEN(bool) drvHostBaseIsMediaPollingRequiredOs(PDRVHOSTBASE pThis) { /* For Windows we alwys use an internal approach. */ RT_NOREF(pThis); return false; } DECLHIDDEN(void) drvHostBaseDestructOs(PDRVHOSTBASE pThis) { /* * Terminate the thread. */ if (pThis->Os.hThrdMediaChange != NIL_RTTHREAD) { int rc; int cTimes = 50; do { if (pThis->Os.hwndDeviceChange) PostMessage(pThis->Os.hwndDeviceChange, WM_CLOSE, 0, 0); /* default win proc will destroy the window */ rc = RTThreadWait(pThis->Os.hThrdMediaChange, 100, NULL); } while (cTimes-- > 0 && rc == VERR_TIMEOUT); if (RT_SUCCESS(rc)) pThis->Os.hThrdMediaChange = NIL_RTTHREAD; } /* * Unlock the drive if we've locked it or we're in passthru mode. */ if ( pThis->fLocked && pThis->Os.hFileDevice != NIL_RTFILE && pThis->pfnDoLock) { int rc = pThis->pfnDoLock(pThis, false); if (RT_SUCCESS(rc)) pThis->fLocked = false; } if (pThis->Os.hwndDeviceChange) { if (SetWindowLongPtr(pThis->Os.hwndDeviceChange, GWLP_USERDATA, 0) == (LONG_PTR)pThis) PostMessage(pThis->Os.hwndDeviceChange, WM_CLOSE, 0, 0); /* default win proc will destroy the window */ pThis->Os.hwndDeviceChange = NULL; } if (pThis->Os.hFileDevice != NIL_RTFILE) { int rc = RTFileClose(pThis->Os.hFileDevice); AssertRC(rc); pThis->Os.hFileDevice = NIL_RTFILE; } }