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/* $Id: DrvRawFile.cpp 35353 2010-12-27 17:25:52Z vboxsync $ */
/** @file
* VBox stream drivers - Raw file output.
*/
/*
* Copyright (C) 2006-2010 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_DEFAULT
#include <VBox/vmm/pdmdrv.h>
#include <iprt/assert.h>
#include <iprt/file.h>
#include <iprt/mem.h>
#include <iprt/semaphore.h>
#include <iprt/stream.h>
#include <iprt/string.h>
#include <iprt/uuid.h>
#include "VBoxDD.h"
/*******************************************************************************
* Defined Constants And Macros *
*******************************************************************************/
/** Converts a pointer to DRVRAWFILE::IMedia to a PDRVRAWFILE. */
#define PDMISTREAM_2_DRVRAWFILE(pInterface) ( (PDRVRAWFILE)((uintptr_t)pInterface - RT_OFFSETOF(DRVRAWFILE, IStream)) )
/** Converts a pointer to PDMDRVINS::IBase to a PPDMDRVINS. */
#define PDMIBASE_2_DRVINS(pInterface) ( (PPDMDRVINS)((uintptr_t)pInterface - RT_OFFSETOF(PDMDRVINS, IBase)) )
/*******************************************************************************
* Structures and Typedefs *
*******************************************************************************/
/**
* Raw file output driver instance data.
*
* @implements PDMISTREAM
*/
typedef struct DRVRAWFILE
{
/** The stream interface. */
PDMISTREAM IStream;
/** Pointer to the driver instance. */
PPDMDRVINS pDrvIns;
/** Pointer to the file name. (Freed by MM) */
char *pszLocation;
/** Flag whether VirtualBox represents the server or client side. */
RTFILE OutputFile;
} DRVRAWFILE, *PDRVRAWFILE;
/* -=-=-=-=- PDMISTREAM -=-=-=-=- */
/** @copydoc PDMISTREAM::pfnWrite */
static DECLCALLBACK(int) drvRawFileWrite(PPDMISTREAM pInterface, const void *pvBuf, size_t *pcbWrite)
{
int rc = VINF_SUCCESS;
PDRVRAWFILE pThis = PDMISTREAM_2_DRVRAWFILE(pInterface);
LogFlow(("%s: pvBuf=%p *pcbWrite=%#x (%s)\n", __FUNCTION__, pvBuf, *pcbWrite, pThis->pszLocation));
Assert(pvBuf);
if (pThis->OutputFile != NIL_RTFILE)
{
size_t cbWritten;
rc = RTFileWrite(pThis->OutputFile, pvBuf, *pcbWrite, &cbWritten);
#if 0
/* don't flush here, takes too long and we will loose characters */
if (RT_SUCCESS(rc))
RTFileFlush(pThis->OutputFile);
#endif
*pcbWrite = cbWritten;
}
LogFlow(("%s: returns %Rrc\n", __FUNCTION__, rc));
return rc;
}
/* -=-=-=-=- PDMIBASE -=-=-=-=- */
/**
* @interface_method_impl{PDMIBASE,pfnQueryInterface}
*/
static DECLCALLBACK(void *) drvRawFileQueryInterface(PPDMIBASE pInterface, const char *pszIID)
{
PPDMDRVINS pDrvIns = PDMIBASE_2_DRVINS(pInterface);
PDRVRAWFILE pThis = PDMINS_2_DATA(pDrvIns, PDRVRAWFILE);
PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
PDMIBASE_RETURN_INTERFACE(pszIID, PDMISTREAM, &pThis->IStream);
return NULL;
}
/* -=-=-=-=- PDMDRVREG -=-=-=-=- */
/**
* Power off a raw output stream driver instance.
*
* This does most of the destruction work, to avoid ordering dependencies.
*
* @param pDrvIns The driver instance data.
*/
static DECLCALLBACK(void) drvRawFilePowerOff(PPDMDRVINS pDrvIns)
{
PDRVRAWFILE pThis = PDMINS_2_DATA(pDrvIns, PDRVRAWFILE);
LogFlow(("%s: %s\n", __FUNCTION__, pThis->pszLocation));
if (pThis->OutputFile != NIL_RTFILE)
{
RTFileClose(pThis->OutputFile);
pThis->OutputFile = NIL_RTFILE;
}
}
/**
* Destruct a raw output stream 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) drvRawFileDestruct(PPDMDRVINS pDrvIns)
{
PDRVRAWFILE pThis = PDMINS_2_DATA(pDrvIns, PDRVRAWFILE);
LogFlow(("%s: %s\n", __FUNCTION__, pThis->pszLocation));
PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
if (pThis->pszLocation)
MMR3HeapFree(pThis->pszLocation);
if (pThis->OutputFile != NIL_RTFILE)
{
RTFileClose(pThis->OutputFile);
pThis->OutputFile = NIL_RTFILE;
}
}
/**
* Construct a raw output stream driver instance.
*
* @copydoc FNPDMDRVCONSTRUCT
*/
static DECLCALLBACK(int) drvRawFileConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
{
PDRVRAWFILE pThis = PDMINS_2_DATA(pDrvIns, PDRVRAWFILE);
PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
/*
* Init the static parts.
*/
pThis->pDrvIns = pDrvIns;
pThis->pszLocation = NULL;
pThis->OutputFile = NIL_RTFILE;
/* IBase */
pDrvIns->IBase.pfnQueryInterface = drvRawFileQueryInterface;
/* IStream */
pThis->IStream.pfnWrite = drvRawFileWrite;
/*
* Read the configuration.
*/
if (!CFGMR3AreValuesValid(pCfg, "Location\0"))
AssertFailedReturn(VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES);
int rc = CFGMR3QueryStringAlloc(pCfg, "Location", &pThis->pszLocation);
if (RT_FAILURE(rc))
AssertMsgFailedReturn(("Configuration error: query \"Location\" resulted in %Rrc.\n", rc), rc);
/*
* Open the raw file.
*/
rc = RTFileOpen(&pThis->OutputFile, pThis->pszLocation, RTFILE_O_WRITE | RTFILE_O_CREATE_REPLACE | RTFILE_O_DENY_NONE);
if (RT_FAILURE(rc))
{
LogRel(("RawFile%d: CreateFile failed rc=%Rrc\n", pDrvIns->iInstance));
return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("RawFile#%d failed to create the raw output file %s"), pDrvIns->iInstance, pThis->pszLocation);
}
LogFlow(("drvRawFileConstruct: location %s\n", pThis->pszLocation));
LogRel(("RawFile#%u: location %s\n", pDrvIns->iInstance, pThis->pszLocation));
return VINF_SUCCESS;
}
/**
* Raw file driver registration record.
*/
const PDMDRVREG g_DrvRawFile =
{
/* u32Version */
PDM_DRVREG_VERSION,
/* szName */
"RawFile",
/* szRCMod */
"",
/* szR0Mod */
"",
/* pszDescription */
"RawFile stream driver.",
/* fFlags */
PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
/* fClass. */
PDM_DRVREG_CLASS_STREAM,
/* cMaxInstances */
~0,
/* cbInstance */
sizeof(DRVRAWFILE),
/* pfnConstruct */
drvRawFileConstruct,
/* pfnDestruct */
drvRawFileDestruct,
/* pfnRelocate */
NULL,
/* pfnIOCtl */
NULL,
/* pfnPowerOn */
NULL,
/* pfnReset */
NULL,
/* pfnSuspend */
NULL,
/* pfnResume */
NULL,
/* pfnAttach */
NULL,
/* pfnDetach */
NULL,
/* pfnPowerOff */
drvRawFilePowerOff,
/* pfnSoftReset */
NULL,
/* u32EndVersion */
PDM_DRVREG_VERSION
};
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