/* $Id: DrvMediaISO.cpp 57358 2015-08-14 15:16:38Z vboxsync $ */ /** @file * VBox storage devices: ISO image media 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_ISO #include #include #include #include #include #include "VBoxDD.h" /********************************************************************************************************************************* * Defined Constants And Macros * *********************************************************************************************************************************/ /** Converts a pointer to MEDIAISO::IMedia to a PRDVMEDIAISO. */ #define PDMIMEDIA_2_DRVMEDIAISO(pInterface) ( (PDRVMEDIAISO)((uintptr_t)pInterface - RT_OFFSETOF(DRVMEDIAISO, IMedia)) ) /********************************************************************************************************************************* * Structures and Typedefs * *********************************************************************************************************************************/ /** * Block driver instance data. * * @implements PDMIMEDIA */ typedef struct DRVMEDIAISO { /** The media interface. */ PDMIMEDIA IMedia; /** Pointer to the driver instance. */ PPDMDRVINS pDrvIns; /** Pointer to the filename. (Freed by MM) */ char *pszFilename; /** File handle of the ISO file. */ RTFILE hFile; } DRVMEDIAISO, *PDRVMEDIAISO; /* -=-=-=-=- PDMIMEDIA -=-=-=-=- */ /** @copydoc PDMIMEDIA::pfnGetSize */ static DECLCALLBACK(uint64_t) drvMediaISOGetSize(PPDMIMEDIA pInterface) { PDRVMEDIAISO pThis = PDMIMEDIA_2_DRVMEDIAISO(pInterface); LogFlow(("drvMediaISOGetSize: '%s'\n", pThis->pszFilename)); uint64_t cbFile; int rc = RTFileGetSize(pThis->hFile, &cbFile); if (RT_SUCCESS(rc)) { LogFlow(("drvMediaISOGetSize: returns %lld (%s)\n", cbFile, pThis->pszFilename)); return cbFile; } AssertMsgFailed(("Error querying ISO file size, rc=%Rrc. (%s)\n", rc, pThis->pszFilename)); return 0; } /** @copydoc PDMIMEDIA::pfnBiosGetPCHSGeometry */ static DECLCALLBACK(int) drvMediaISOBiosGetPCHSGeometry(PPDMIMEDIA pInterface, PPDMMEDIAGEOMETRY pPCHSGeometry) { return VERR_NOT_IMPLEMENTED; } /** @copydoc PDMIMEDIA::pfnBiosSetPCHSGeometry */ static DECLCALLBACK(int) drvMediaISOBiosSetPCHSGeometry(PPDMIMEDIA pInterface, PCPDMMEDIAGEOMETRY pPCHSGeometry) { return VERR_NOT_IMPLEMENTED; } /** @copydoc PDMIMEDIA::pfnBiosGetLCHSGeometry */ static DECLCALLBACK(int) drvMediaISOBiosGetLCHSGeometry(PPDMIMEDIA pInterface, PPDMMEDIAGEOMETRY pLCHSGeometry) { return VERR_NOT_IMPLEMENTED; } /** @copydoc PDMIMEDIA::pfnBiosSetLCHSGeometry */ static DECLCALLBACK(int) drvMediaISOBiosSetLCHSGeometry(PPDMIMEDIA pInterface, PCPDMMEDIAGEOMETRY pLCHSGeometry) { return VERR_NOT_IMPLEMENTED; } /** * Read bits. * * @see PDMIMEDIA::pfnRead for details. */ static DECLCALLBACK(int) drvMediaISORead(PPDMIMEDIA pInterface, uint64_t off, void *pvBuf, size_t cbRead) { PDRVMEDIAISO pThis = PDMIMEDIA_2_DRVMEDIAISO(pInterface); LogFlow(("drvMediaISORead: off=%#llx pvBuf=%p cbRead=%#x (%s)\n", off, pvBuf, cbRead, pThis->pszFilename)); Assert(pThis->hFile != NIL_RTFILE); Assert(pvBuf); /* * Seek to the position and read. */ int rc = RTFileReadAt(pThis->hFile, off, pvBuf, cbRead, NULL); if (RT_SUCCESS(rc)) Log2(("drvMediaISORead: off=%#llx pvBuf=%p cbRead=%#x (%s)\n" "%16.*Rhxd\n", off, pvBuf, cbRead, pThis->pszFilename, cbRead, pvBuf)); else AssertMsgFailed(("RTFileReadAt(%RTfile, %#llx, %p, %#x) -> %Rrc ('%s')\n", pThis->hFile, off, pvBuf, cbRead, rc, pThis->pszFilename)); LogFlow(("drvMediaISORead: returns %Rrc\n", rc)); return rc; } /** @copydoc PDMIMEDIA::pfnWrite */ static DECLCALLBACK(int) drvMediaISOWrite(PPDMIMEDIA pInterface, uint64_t off, const void *pvBuf, size_t cbWrite) { AssertMsgFailed(("Attempt to write to an ISO file!\n")); return VERR_NOT_IMPLEMENTED; } /** @copydoc PDMIMEDIA::pfnFlush */ static DECLCALLBACK(int) drvMediaISOFlush(PPDMIMEDIA pInterface) { /* No buffered data that still needs to be written. */ return VINF_SUCCESS; } /** @copydoc PDMIMEDIA::pfnGetUuid */ static DECLCALLBACK(int) drvMediaISOGetUuid(PPDMIMEDIA pInterface, PRTUUID pUuid) { LogFlow(("drvMediaISOGetUuid: returns VERR_NOT_IMPLEMENTED\n")); return VERR_NOT_IMPLEMENTED; } /** @copydoc PDMIMEDIA::pfnIsReadOnly */ static DECLCALLBACK(bool) drvMediaISOIsReadOnly(PPDMIMEDIA pInterface) { return true; } /* -=-=-=-=- PDMIBASE -=-=-=-=- */ /** * @interface_method_impl{PDMIBASE,pfnQueryInterface} */ static DECLCALLBACK(void *) drvMediaISOQueryInterface(PPDMIBASE pInterface, const char *pszIID) { PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface); PDRVMEDIAISO pThis = PDMINS_2_DATA(pDrvIns, PDRVMEDIAISO); PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase); PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMEDIA, &pThis->IMedia); return NULL; } /* -=-=-=-=- PDMDRVREG -=-=-=-=- */ /** * Destruct a driver instance. * * Most VM resources are freed by the VM. This callback is provided so that any non-VM * resources can be freed correctly. * * @param pDrvIns The driver instance data. */ static DECLCALLBACK(void) drvMediaISODestruct(PPDMDRVINS pDrvIns) { PDRVMEDIAISO pThis = PDMINS_2_DATA(pDrvIns, PDRVMEDIAISO); LogFlow(("drvMediaISODestruct: '%s'\n", pThis->pszFilename)); PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns); if (pThis->hFile != NIL_RTFILE) { RTFileClose(pThis->hFile); pThis->hFile = NIL_RTFILE; } if (pThis->pszFilename) { MMR3HeapFree(pThis->pszFilename); pThis->pszFilename = NULL; } } /** * Construct a ISO media driver instance. * * @copydoc FNPDMDRVCONSTRUCT */ static DECLCALLBACK(int) drvMediaISOConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags) { PDRVMEDIAISO pThis = PDMINS_2_DATA(pDrvIns, PDRVMEDIAISO); PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns); /* * Init the static parts. */ pThis->pDrvIns = pDrvIns; pThis->hFile = NIL_RTFILE; /* IBase */ pDrvIns->IBase.pfnQueryInterface = drvMediaISOQueryInterface; /* IMedia */ pThis->IMedia.pfnRead = drvMediaISORead; pThis->IMedia.pfnWrite = drvMediaISOWrite; pThis->IMedia.pfnFlush = drvMediaISOFlush; pThis->IMedia.pfnGetSize = drvMediaISOGetSize; pThis->IMedia.pfnGetUuid = drvMediaISOGetUuid; pThis->IMedia.pfnIsReadOnly = drvMediaISOIsReadOnly; pThis->IMedia.pfnBiosGetPCHSGeometry = drvMediaISOBiosGetPCHSGeometry; pThis->IMedia.pfnBiosSetPCHSGeometry = drvMediaISOBiosSetPCHSGeometry; pThis->IMedia.pfnBiosGetLCHSGeometry = drvMediaISOBiosGetLCHSGeometry; pThis->IMedia.pfnBiosSetLCHSGeometry = drvMediaISOBiosSetLCHSGeometry; /* * Read the configuration. */ if (!CFGMR3AreValuesValid(pCfg, "Path\0")) return VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES; char *pszName; int rc = CFGMR3QueryStringAlloc(pCfg, "Path", &pszName); if (RT_FAILURE(rc)) return PDMDRV_SET_ERROR(pDrvIns, rc, N_("Failed to query \"Path\" from the config")); /* * Open the image. */ rc = RTFileOpen(&pThis->hFile, pszName, RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_WRITE); if (RT_SUCCESS(rc)) { LogFlow(("drvMediaISOConstruct: ISO image '%s' opened successfully.\n", pszName)); pThis->pszFilename = pszName; } else { PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("Failed to open ISO file \"%s\""), pszName); MMR3HeapFree(pszName); } return rc; } /** * ISO media driver registration record. */ const PDMDRVREG g_DrvMediaISO = { /* u32Version */ PDM_DRVREG_VERSION, /* szName */ "MediaISO", /* szRCMod */ "", /* szR0Mod */ "", /* pszDescription */ "ISO media access driver.", /* fFlags */ PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT, /* fClass. */ PDM_DRVREG_CLASS_MEDIA, /* cMaxInstances */ ~0U, /* cbInstance */ sizeof(DRVMEDIAISO), /* pfnConstruct */ drvMediaISOConstruct, /* pfnDestruct */ drvMediaISODestruct, /* pfnRelocate */ NULL, /* pfnIOCtl */ NULL, /* pfnPowerOn */ NULL, /* pfnReset */ NULL, /* pfnSuspend */ NULL, /* pfnResume */ NULL, /* pfnAttach */ NULL, /* pfnDetach */ NULL, /* pfnPowerOff */ NULL, /* pfnSoftReset */ NULL, /* u32EndVersion */ PDM_DRVREG_VERSION };