Devices/Storage/DrvVD.cpp

	DrvVD.cpp revision a3369a746b56a8966dd78619f4d191c9662f400d
77b1a2d8b5dbe2c0b5200794914239fee3c8ee5dvboxsync/* $Id$ */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/** @file
77b1a2d8b5dbe2c0b5200794914239fee3c8ee5dvboxsync * DrvVD - Generic VBox disk media driver.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/*
1c94c0a63ba68be1a7b2c640e70d7a06464e4fcavboxsync * Copyright (C) 2006-2008 Sun Microsystems, Inc.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync *
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * available from http://www.virtualbox.org. This file is free software;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * you can redistribute it and/or modify it under the terms of the GNU
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * General Public License (GPL) as published by the Free Software
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
1c94c0a63ba68be1a7b2c640e70d7a06464e4fcavboxsync *
1c94c0a63ba68be1a7b2c640e70d7a06464e4fcavboxsync * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
1c94c0a63ba68be1a7b2c640e70d7a06464e4fcavboxsync * Clara, CA 95054 USA or visit http://www.sun.com if you need
1c94c0a63ba68be1a7b2c640e70d7a06464e4fcavboxsync * additional information or have any questions.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/*******************************************************************************
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync*   Header files                                                               *
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync*******************************************************************************/
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync#define LOG_GROUP LOG_GROUP_DRV_VD
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync#include <VBox/VBoxHDD-new.h>
da957c069c2a3c582fe265ff88170ce4c42b499dvboxsync#include <VBox/pdmdrv.h>
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync#include <iprt/alloc.h>
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync#include <iprt/assert.h>
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync#include <iprt/uuid.h>
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync#include <iprt/file.h>
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync#include <iprt/string.h>
9496f2d398b49813176939d7a339ae513d5175efvboxsync#include <iprt/cache.h>
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync#include <iprt/tcp.h>
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync#ifndef VBOX_OSE
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync/* All lwip header files are not C++ safe. So hack around this. */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync__BEGIN_DECLS
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync#include <lwip/inet.h>
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync#include <lwip/tcp.h>
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync#include <lwip/sockets.h>
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync__END_DECLS
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync#endif /* !VBOX_OSE */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync#include "Builtins.h"
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync#ifndef VBOX_OSE
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync/* Small hack to get at lwIP initialized status */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsyncextern bool DevINIPConfigured(void);
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync#endif /* !VBOX_OSE */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/*******************************************************************************
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync*   Defined types, constants and macros                                        *
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync*******************************************************************************/
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/** Converts a pointer to VDIDISK::IMedia to a PVBOXDISK. */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync#define PDMIMEDIA_2_VBOXDISK(pInterface) \
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    ( (PVBOXDISK)((uintptr_t)pInterface - RT_OFFSETOF(VBOXDISK, IMedia)) )
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/** Converts a pointer to PDMDRVINS::IBase to a PPDMDRVINS. */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync#define PDMIBASE_2_DRVINS(pInterface) \
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    ( (PPDMDRVINS)((uintptr_t)pInterface - RT_OFFSETOF(PDMDRVINS, IBase)) )
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/** Converts a pointer to PDMDRVINS::IBase to a PVBOXDISK. */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync#define PDMIBASE_2_VBOXDISK(pInterface) \
0abd77741a608f6c41c8dfcd4781b8b84adf1044vboxsync    ( PDMINS_2_DATA(PDMIBASE_2_DRVINS(pInterface), PVBOXDISK) )
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync/** Converts a pointer to VBOXDISK::IMediaAsync to a PVBOXDISK. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync#define PDMIMEDIAASYNC_2_VBOXDISK(pInterface) \
9496f2d398b49813176939d7a339ae513d5175efvboxsync    ( (PVBOXDISK)((uintptr_t)pInterface - RT_OFFSETOF(VBOXDISK, IMediaAsync)) )
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync/** Converts a pointer to VBOXDISK::ITransportAsyncPort to a PVBOXDISK. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync#define PDMITRANSPORTASYNCPORT_2_VBOXDISK(pInterface) \
9496f2d398b49813176939d7a339ae513d5175efvboxsync    ( (PVBOXDISK)((uintptr_t)pInterface - RT_OFFSETOF(VBOXDISK, ITransportAsyncPort)) )
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync/**
9496f2d398b49813176939d7a339ae513d5175efvboxsync * Structure for an async I/O task.
9496f2d398b49813176939d7a339ae513d5175efvboxsync */
9496f2d398b49813176939d7a339ae513d5175efvboxsynctypedef struct DRVVDASYNCTASK
9496f2d398b49813176939d7a339ae513d5175efvboxsync{
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /** Callback which is called on completion. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PFNVDCOMPLETED pfnCompleted;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /** Opqaue user data which is passed on completion. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    void           *pvUser;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /** Opaque user data the caller passed on transfer initiation. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    void           *pvUserCaller;
9496f2d398b49813176939d7a339ae513d5175efvboxsync} DRVVDASYNCTASK, *PDRVVDASYNCTASK;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync/**
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync * VBox disk container, image information, private part.
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync */
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsynctypedef struct VBOXIMAGE
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync{
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    /** Pointer to next image. */
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    struct VBOXIMAGE    *pNext;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    /** Pointer to list of VD interfaces. Per-image. */
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    PVDINTERFACE       pVDIfsImage;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    /** Common structure for the configuration information interface. */
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    VDINTERFACE        VDIConfig;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync} VBOXIMAGE, *PVBOXIMAGE;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/**
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * VBox disk container media main structure, private part.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsynctypedef struct VBOXDISK
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /** The VBox disk container. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PVBOXHDD           pDisk;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /** The media interface. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PDMIMEDIA          IMedia;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /** Pointer to the driver instance. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PPDMDRVINS         pDrvIns;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /** Flag whether suspend has changed image open mode to read only. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    bool               fTempReadOnly;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    /** Pointer to list of VD interfaces. Per-disk. */
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    PVDINTERFACE       pVDIfsDisk;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /** Common structure for the supported error interface. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    VDINTERFACE        VDIError;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /** Callback table for error interface. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    VDINTERFACEERROR   VDIErrorCallbacks;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    /** Common structure for the supported TCP network stack interface. */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    VDINTERFACE        VDITcpNet;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    /** Callback table for TCP network stack interface. */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    VDINTERFACETCPNET  VDITcpNetCallbacks;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /** Common structure for the supported async I/O interface. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    VDINTERFACE        VDIAsyncIO;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /** Callback table for async I/O interface. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    VDINTERFACEASYNCIO VDIAsyncIOCallbacks;
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync    /** Callback table for the configuration information interface. */
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync    VDINTERFACECONFIG  VDIConfigCallbacks;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /** Flag whether opened disk suppports async I/O operations. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    bool               fAsyncIOSupported;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /** The async media interface. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PDMIMEDIAASYNC           IMediaAsync;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /** The async media port interface above. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PPDMIMEDIAASYNCPORT      pDrvMediaAsyncPort;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /** Pointer to the asynchronous media driver below. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PPDMITRANSPORTASYNC      pDrvTransportAsync;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /** Async transport port interface. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PDMITRANSPORTASYNCPORT   ITransportAsyncPort;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /** Our cache to reduce allocation overhead. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PRTOBJCACHE              pCache;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    /** Pointer to the list of data we need to keep per image. */
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    PVBOXIMAGE               pImages;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync} VBOXDISK, *PVBOXDISK;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/*******************************************************************************
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync*   Error reporting callback                                                   *
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync*******************************************************************************/
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic void drvvdErrorCallback(void *pvUser, int rc, RT_SRC_POS_DECL,
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync                               const char *pszFormat, va_list va)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    PPDMDRVINS pDrvIns = (PPDMDRVINS)pvUser;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    pDrvIns->pDrvHlp->pfnVMSetErrorV(pDrvIns, rc, RT_SRC_POS_ARGS, pszFormat, va);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync/**
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync * Internal: allocate new image descriptor and put it in the list
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync */
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsyncstatic PVBOXIMAGE drvvdNewImage(PVBOXDISK pThis)
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync{
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    AssertPtr(pThis);
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    PVBOXIMAGE pImage = (PVBOXIMAGE)RTMemAllocZ(sizeof(VBOXIMAGE));
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    if (pImage)
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    {
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        pImage->pVDIfsImage = NULL;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        PVBOXIMAGE *pp = &pThis->pImages;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        while (*pp != NULL)
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync            pp = &(*pp)->pNext;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        *pp = pImage;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        pImage->pNext = NULL;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    }
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    return pImage;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync}
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync/**
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync * Internal: free the list of images descriptors.
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync */
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsyncstatic void drvvdFreeImages(PVBOXDISK pThis)
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync{
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    while (pThis->pImages != NULL)
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    {
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        PVBOXIMAGE p = pThis->pImages;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        pThis->pImages = pThis->pImages->pNext;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        RTMemFree(p);
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    }
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync}
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync/*******************************************************************************
9496f2d398b49813176939d7a339ae513d5175efvboxsync*   VD Async I/O interface implementation                                      *
9496f2d398b49813176939d7a339ae513d5175efvboxsync*******************************************************************************/
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsyncstatic DECLCALLBACK(int) drvvdAsyncIOOpen(void *pvUser, const char *pszLocation, bool fReadonly, void **ppStorage)
9496f2d398b49813176939d7a339ae513d5175efvboxsync{
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PVBOXDISK pDrvVD = (PVBOXDISK)pvUser;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    return pDrvVD->pDrvTransportAsync->pfnOpen(pDrvVD->pDrvTransportAsync, pszLocation, fReadonly, ppStorage);
9496f2d398b49813176939d7a339ae513d5175efvboxsync}
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsyncstatic DECLCALLBACK(int) drvvdAsyncIOClose(void *pvUser, void *pStorage)
9496f2d398b49813176939d7a339ae513d5175efvboxsync{
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PVBOXDISK pDrvVD = (PVBOXDISK)pvUser;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    AssertMsg(pDrvVD->pDrvTransportAsync, ("Asynchronous function called but no async transport interface below\n"));
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync   return pDrvVD->pDrvTransportAsync->pfnClose(pDrvVD->pDrvTransportAsync, pStorage);
9496f2d398b49813176939d7a339ae513d5175efvboxsync}
9496f2d398b49813176939d7a339ae513d5175efvboxsync
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsyncstatic DECLCALLBACK(int) drvvdAsyncIORead(void *pvUser, void *pStorage, uint64_t uOffset,
9496f2d398b49813176939d7a339ae513d5175efvboxsync                                          size_t cbRead, void *pvBuf, size_t *pcbRead)
9496f2d398b49813176939d7a339ae513d5175efvboxsync{
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PVBOXDISK pDrvVD = (PVBOXDISK)pvUser;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    AssertMsg(pDrvVD->pDrvTransportAsync, ("Asynchronous function called but no async transport interface below\n"));
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    return pDrvVD->pDrvTransportAsync->pfnReadSynchronous(pDrvVD->pDrvTransportAsync,
9496f2d398b49813176939d7a339ae513d5175efvboxsync                                                          pStorage,
9496f2d398b49813176939d7a339ae513d5175efvboxsync                                                          uOffset, pvBuf, cbRead, pcbRead);
9496f2d398b49813176939d7a339ae513d5175efvboxsync}
9496f2d398b49813176939d7a339ae513d5175efvboxsync
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsyncstatic DECLCALLBACK(int) drvvdAsyncIOWrite(void *pvUser, void *pStorage, uint64_t uOffset,
9496f2d398b49813176939d7a339ae513d5175efvboxsync                                           size_t cbWrite, const void *pvBuf, size_t *pcbWritten)
9496f2d398b49813176939d7a339ae513d5175efvboxsync{
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PVBOXDISK pDrvVD = (PVBOXDISK)pvUser;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    AssertMsg(pDrvVD->pDrvTransportAsync, ("Asynchronous function called but no async transport interface below\n"));
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    return pDrvVD->pDrvTransportAsync->pfnWriteSynchronous(pDrvVD->pDrvTransportAsync,
9496f2d398b49813176939d7a339ae513d5175efvboxsync                                                           pStorage,
9496f2d398b49813176939d7a339ae513d5175efvboxsync                                                           uOffset, pvBuf, cbWrite, pcbWritten);
9496f2d398b49813176939d7a339ae513d5175efvboxsync}
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsyncstatic DECLCALLBACK(int) drvvdAsyncIOFlush(void *pvUser, void *pStorage)
9496f2d398b49813176939d7a339ae513d5175efvboxsync{
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PVBOXDISK pDrvVD = (PVBOXDISK)pvUser;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    AssertMsg(pDrvVD->pDrvTransportAsync, ("Asynchronous function called but no async transport interface below\n"));
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    return pDrvVD->pDrvTransportAsync->pfnFlushSynchronous(pDrvVD->pDrvTransportAsync, pStorage);
9496f2d398b49813176939d7a339ae513d5175efvboxsync}
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsyncstatic DECLCALLBACK(int) drvvdAsyncIOPrepareRead(void *pvUser, void *pStorage, uint64_t uOffset, void *pvBuf, size_t cbRead, void **ppTask)
9496f2d398b49813176939d7a339ae513d5175efvboxsync{
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PVBOXDISK pDrvVD = (PVBOXDISK)pvUser;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    AssertMsg(pDrvVD->pDrvTransportAsync, ("Asynchronous function called but no async transport interface below\n"));
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    return pDrvVD->pDrvTransportAsync->pfnPrepareRead(pDrvVD->pDrvTransportAsync, pStorage, uOffset, pvBuf, cbRead, ppTask);
9496f2d398b49813176939d7a339ae513d5175efvboxsync}
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsyncstatic DECLCALLBACK(int) drvvdAsyncIOPrepareWrite(void *pvUser, void *pStorage, uint64_t uOffset, void *pvBuf, size_t cbWrite, void **ppTask)
9496f2d398b49813176939d7a339ae513d5175efvboxsync{
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PVBOXDISK pDrvVD = (PVBOXDISK)pvUser;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    AssertMsg(pDrvVD->pDrvTransportAsync, ("Asynchronous function called but no async transport interface below\n"));
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    return pDrvVD->pDrvTransportAsync->pfnPrepareWrite(pDrvVD->pDrvTransportAsync, pStorage, uOffset, pvBuf, cbWrite, ppTask);
9496f2d398b49813176939d7a339ae513d5175efvboxsync}
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsyncstatic DECLCALLBACK(int) drvvdAsyncIOTasksSubmit(void *pvUser, void *apTasks[], unsigned cTasks, void *pvUser2,
9496f2d398b49813176939d7a339ae513d5175efvboxsync                                                 void *pvUserCaller, PFNVDCOMPLETED pfnTasksCompleted)
9496f2d398b49813176939d7a339ae513d5175efvboxsync{
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PVBOXDISK pDrvVD = (PVBOXDISK)pvUser;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PDRVVDASYNCTASK pDrvVDAsyncTask;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    int rc;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    AssertMsg(pDrvVD->pDrvTransportAsync, ("Asynchronous function called but no async transport interface below\n"));
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    rc = RTCacheRequest(pDrvVD->pCache, (void **)&pDrvVDAsyncTask);
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    if (RT_FAILURE(rc))
9496f2d398b49813176939d7a339ae513d5175efvboxsync        return rc;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    pDrvVDAsyncTask->pfnCompleted = pfnTasksCompleted;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    pDrvVDAsyncTask->pvUser       = pvUser2;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    pDrvVDAsyncTask->pvUserCaller = pvUserCaller;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    return pDrvVD->pDrvTransportAsync->pfnTasksSubmit(pDrvVD->pDrvTransportAsync, apTasks, cTasks, pDrvVDAsyncTask);
9496f2d398b49813176939d7a339ae513d5175efvboxsync}
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync/*******************************************************************************
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync*   VD Configuration interface implementation                                  *
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync*******************************************************************************/
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsyncstatic bool drvvdCfgAreValuesValid(PVDCFGNODE pNode, const char *pszzValid)
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync{
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync    return CFGMR3AreValuesValid((PCFGMNODE)pNode, pszzValid);
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync}
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsyncstatic int drvvdCfgQueryType(PVDCFGNODE pNode, const char *pszName, PVDCFGVALUETYPE penmType)
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync{
860f2e2a6796df7329c811765dda55e58ed1126avboxsync    Assert(VDCFGVALUETYPE_INTEGER == (VDCFGVALUETYPE)CFGMVALUETYPE_INTEGER);
860f2e2a6796df7329c811765dda55e58ed1126avboxsync    Assert(VDCFGVALUETYPE_STRING == (VDCFGVALUETYPE)CFGMVALUETYPE_STRING);
860f2e2a6796df7329c811765dda55e58ed1126avboxsync    Assert(VDCFGVALUETYPE_BYTES == (VDCFGVALUETYPE)CFGMVALUETYPE_BYTES);
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync    return CFGMR3QueryType((PCFGMNODE)pNode, pszName, (PCFGMVALUETYPE)penmType);
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync}
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsyncstatic int drvvdCfgQuerySize(PVDCFGNODE pNode, const char *pszName, size_t *pcb)
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync{
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync    return CFGMR3QuerySize((PCFGMNODE)pNode, pszName, pcb);
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync}
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsyncstatic int drvvdCfgQueryInteger(PVDCFGNODE pNode, const char *pszName, uint64_t *pu64)
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync{
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync    return CFGMR3QueryInteger((PCFGMNODE)pNode, pszName, pu64);
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync}
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsyncstatic int drvvdCfgQueryIntegerDef(PVDCFGNODE pNode, const char *pszName, uint64_t *pu64, uint64_t u64Def)
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync{
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync    return CFGMR3QueryInteger((PCFGMNODE)pNode, pszName, pu64);
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync}
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsyncstatic int drvvdCfgQueryString(PVDCFGNODE pNode, const char *pszName, char *pszString, size_t cchString)
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync{
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync    return CFGMR3QueryString((PCFGMNODE)pNode, pszName, pszString, cchString);
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync}
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsyncstatic int drvvdCfgQueryStringDef(PVDCFGNODE pNode, const char *pszName, char *pszString, size_t cchString, const char *pszDef)
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync{
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync    return CFGMR3QueryStringDef((PCFGMNODE)pNode, pszName, pszString, cchString, pszDef);
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync}
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsyncstatic int drvvdCfgQueryBytes(PVDCFGNODE pNode, const char *pszName, void *pvData, size_t cbData)
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync{
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync    return CFGMR3QueryBytes((PCFGMNODE)pNode, pszName, pvData, cbData);
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync}
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync#ifndef VBOX_OSE
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync/*******************************************************************************
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync*   VD TCP network stack interface implementation - INIP case                  *
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync*******************************************************************************/
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync/** @copydoc VDINTERFACETCPNET::pfnClientConnect */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsyncstatic DECLCALLBACK(int) drvvdINIPClientConnect(const char *pszAddress, uint32_t uPort, PRTSOCKET pSock)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync{
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    int rc = VINF_SUCCESS;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    /* First check whether lwIP is set up in this VM instance. */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    if (!DevINIPConfigured())
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    {
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        LogRelFunc(("no IP stack\n"));
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        return VERR_NET_HOST_UNREACHABLE;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    }
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    /* Resolve hostname. As there is no standard resolver for lwIP yet,
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync     * just accept numeric IP addresses for now. */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    struct in_addr ip;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    if (!lwip_inet_aton(pszAddress, &ip))
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    {
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        LogRelFunc(("cannot resolve IP %s\n", pszAddress));
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        return VERR_NET_HOST_UNREACHABLE;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    }
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    /* Create socket and connect. */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    RTSOCKET Sock = lwip_socket(PF_INET, SOCK_STREAM, 0);
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    if (Sock != -1)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    {
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        struct sockaddr_in InAddr = {0};
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        InAddr.sin_family = AF_INET;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        InAddr.sin_port = htons(uPort);
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        InAddr.sin_addr = ip;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        if (!lwip_connect(Sock, (struct sockaddr *)&InAddr, sizeof(InAddr)))
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        {
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            *pSock = Sock;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            return VINF_SUCCESS;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        }
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        rc = VERR_NET_CONNECTION_REFUSED; /* @todo real solution needed */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        lwip_close(Sock);
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    }
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    else
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        rc = VERR_NET_CONNECTION_REFUSED; /* @todo real solution needed */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    return rc;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync}
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync/** @copydoc VDINTERFACETCPNET::pfnClientClose */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsyncstatic DECLCALLBACK(int) drvvdINIPClientClose(RTSOCKET Sock)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync{
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    lwip_close(Sock);
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    return VINF_SUCCESS; /** @todo real solution needed */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync}
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync/** @copydoc VDINTERFACETCPNET::pfnSelectOne */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsyncstatic DECLCALLBACK(int) drvvdINIPSelectOne(RTSOCKET Sock, unsigned cMillies)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync{
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    fd_set fdsetR;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    FD_ZERO(&fdsetR);
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    FD_SET(Sock, &fdsetR);
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    fd_set fdsetE = fdsetR;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    int rc;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    if (cMillies == RT_INDEFINITE_WAIT)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        rc = lwip_select(Sock + 1, &fdsetR, NULL, &fdsetE, NULL);
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    else
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    {
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        struct timeval timeout;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        timeout.tv_sec = cMillies / 1000;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        timeout.tv_usec = (cMillies % 1000) * 1000;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        rc = lwip_select(Sock + 1, &fdsetR, NULL, &fdsetE, &timeout);
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    }
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    if (rc > 0)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        return VINF_SUCCESS;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    if (rc == 0)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        return VERR_TIMEOUT;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    return VERR_NET_CONNECTION_REFUSED; /** @todo real solution needed */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync}
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync/** @copydoc VDINTERFACETCPNET::pfnRead */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsyncstatic DECLCALLBACK(int) drvvdINIPRead(RTSOCKET Sock, void *pvBuffer, size_t cbBuffer, size_t *pcbRead)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync{
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    /* Do params checking */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    if (!pvBuffer || !cbBuffer)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    {
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        AssertMsgFailed(("Invalid params\n"));
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        return VERR_INVALID_PARAMETER;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    }
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    /*
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync     * Read loop.
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync     * If pcbRead is NULL we have to fill the entire buffer!
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync     */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    size_t cbRead = 0;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    size_t cbToRead = cbBuffer;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    for (;;)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    {
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        /** @todo this clipping here is just in case (the send function
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync         * needed it, so I added it here, too). Didn't investigate if this
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync         * really has issues. Better be safe than sorry. */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        ssize_t cbBytesRead = lwip_recv(Sock, (char *)pvBuffer + cbRead,
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync                                        RT_MIN(cbToRead, 32768), 0);
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        if (cbBytesRead < 0)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            return VERR_NET_CONNECTION_REFUSED; /** @todo real solution */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        if (cbBytesRead == 0 && errno)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            return VERR_NET_CONNECTION_REFUSED; /** @todo real solution */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        if (pcbRead)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        {
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            /* return partial data */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            *pcbRead = cbBytesRead;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            break;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        }
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        /* read more? */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        cbRead += cbBytesRead;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        if (cbRead == cbBuffer)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            break;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        /* next */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        cbToRead = cbBuffer - cbRead;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    }
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    return VINF_SUCCESS;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync}
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync/** @copydoc VDINTERFACETCPNET::pfnWrite */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsyncstatic DECLCALLBACK(int) drvvdINIPWrite(RTSOCKET Sock, const void *pvBuffer, size_t cbBuffer)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync{
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    do
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    {
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        /** @todo lwip send only supports up to 65535 bytes in a single
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync         * send (stupid limitation buried in the code), so make sure we
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync         * don't get any wraparounds. This should be moved to DevINIP
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync         * stack interface once that's implemented. */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        ssize_t cbWritten = lwip_send(Sock, (void *)pvBuffer,
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync                                      RT_MIN(cbBuffer, 32768), 0);
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        if (cbWritten < 0)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            return VERR_NET_CONNECTION_REFUSED; /** @todo real solution needed */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        AssertMsg(cbBuffer >= (size_t)cbWritten, ("Wrote more than we requested!!! cbWritten=%d cbBuffer=%d\n",
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync                                                  cbWritten, cbBuffer));
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        cbBuffer -= cbWritten;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        pvBuffer = (const char *)pvBuffer + cbWritten;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    } while (cbBuffer);
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    return VINF_SUCCESS;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync}
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync/** @copydoc VDINTERFACETCPNET::pfnFlush */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsyncstatic DECLCALLBACK(int) drvvdINIPFlush(RTSOCKET Sock)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync{
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    int fFlag = 1;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    lwip_setsockopt(Sock, IPPROTO_TCP, TCP_NODELAY,
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync                    (const char *)&fFlag, sizeof(fFlag));
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    fFlag = 0;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    lwip_setsockopt(Sock, IPPROTO_TCP, TCP_NODELAY,
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync                    (const char *)&fFlag, sizeof(fFlag));
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    return VINF_SUCCESS;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync}
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync#endif /* !VBOX_OSE */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/*******************************************************************************
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync*   Media interface methods                                                    *
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync*******************************************************************************/
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/** @copydoc PDMIMEDIA::pfnRead */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(int) drvvdRead(PPDMIMEDIA pInterface,
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync                                   uint64_t off, void *pvBuf, size_t cbRead)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    LogFlow(("%s: off=%#llx pvBuf=%p cbRead=%d\n", __FUNCTION__,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync             off, pvBuf, cbRead));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMIMEDIA_2_VBOXDISK(pInterface);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    int rc = VDRead(pThis->pDisk, off, pvBuf, cbRead);
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync    if (RT_SUCCESS(rc))
ff88d4153cd65650577e8c2d1a5a3fdfa0404a80vboxsync        Log2(("%s: off=%#llx pvBuf=%p cbRead=%d %.*Rhxd\n", __FUNCTION__,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync              off, pvBuf, cbRead, cbRead, pvBuf));
fe813b3594039ba864493438e78ee0e7132bc445vboxsync    LogFlow(("%s: returns %Rrc\n", __FUNCTION__, rc));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    return rc;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/** @copydoc PDMIMEDIA::pfnWrite */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(int) drvvdWrite(PPDMIMEDIA pInterface,
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync                                    uint64_t off, const void *pvBuf,
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync                                    size_t cbWrite)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    LogFlow(("%s: off=%#llx pvBuf=%p cbWrite=%d\n", __FUNCTION__,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync             off, pvBuf, cbWrite));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMIMEDIA_2_VBOXDISK(pInterface);
ff88d4153cd65650577e8c2d1a5a3fdfa0404a80vboxsync    Log2(("%s: off=%#llx pvBuf=%p cbWrite=%d %.*Rhxd\n", __FUNCTION__,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync          off, pvBuf, cbWrite, cbWrite, pvBuf));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    int rc = VDWrite(pThis->pDisk, off, pvBuf, cbWrite);
fe813b3594039ba864493438e78ee0e7132bc445vboxsync    LogFlow(("%s: returns %Rrc\n", __FUNCTION__, rc));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    return rc;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/** @copydoc PDMIMEDIA::pfnFlush */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(int) drvvdFlush(PPDMIMEDIA pInterface)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    LogFlow(("%s:\n", __FUNCTION__));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMIMEDIA_2_VBOXDISK(pInterface);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    int rc = VDFlush(pThis->pDisk);
fe813b3594039ba864493438e78ee0e7132bc445vboxsync    LogFlow(("%s: returns %Rrc\n", __FUNCTION__, rc));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    return rc;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/** @copydoc PDMIMEDIA::pfnGetSize */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(uint64_t) drvvdGetSize(PPDMIMEDIA pInterface)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    LogFlow(("%s:\n", __FUNCTION__));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMIMEDIA_2_VBOXDISK(pInterface);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    uint64_t cb = VDGetSize(pThis->pDisk, VD_LAST_IMAGE);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    LogFlow(("%s: returns %#llx (%llu)\n", __FUNCTION__, cb, cb));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    return cb;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/** @copydoc PDMIMEDIA::pfnIsReadOnly */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(bool) drvvdIsReadOnly(PPDMIMEDIA pInterface)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    LogFlow(("%s:\n", __FUNCTION__));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMIMEDIA_2_VBOXDISK(pInterface);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    bool f = VDIsReadOnly(pThis->pDisk);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    LogFlow(("%s: returns %d\n", __FUNCTION__, f));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    return f;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync/** @copydoc PDMIMEDIA::pfnBiosGetPCHSGeometry */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(int) drvvdBiosGetPCHSGeometry(PPDMIMEDIA pInterface,
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync                                                  PPDMMEDIAGEOMETRY pPCHSGeometry)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    LogFlow(("%s:\n", __FUNCTION__));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMIMEDIA_2_VBOXDISK(pInterface);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    int rc = VDGetPCHSGeometry(pThis->pDisk, VD_LAST_IMAGE, pPCHSGeometry);
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync    if (RT_FAILURE(rc))
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    {
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        Log(("%s: geometry not available.\n", __FUNCTION__));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        rc = VERR_PDM_GEOMETRY_NOT_SET;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    }
fe813b3594039ba864493438e78ee0e7132bc445vboxsync    LogFlow(("%s: returns %Rrc (CHS=%d/%d/%d)\n", __FUNCTION__,
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync             rc, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    return rc;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync/** @copydoc PDMIMEDIA::pfnBiosSetPCHSGeometry */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(int) drvvdBiosSetPCHSGeometry(PPDMIMEDIA pInterface,
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync                                                  PCPDMMEDIAGEOMETRY pPCHSGeometry)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    LogFlow(("%s: CHS=%d/%d/%d\n", __FUNCTION__,
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync             pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMIMEDIA_2_VBOXDISK(pInterface);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    int rc = VDSetPCHSGeometry(pThis->pDisk, VD_LAST_IMAGE, pPCHSGeometry);
fe813b3594039ba864493438e78ee0e7132bc445vboxsync    LogFlow(("%s: returns %Rrc\n", __FUNCTION__, rc));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    return rc;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync/** @copydoc PDMIMEDIA::pfnBiosGetLCHSGeometry */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(int) drvvdBiosGetLCHSGeometry(PPDMIMEDIA pInterface,
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync                                                  PPDMMEDIAGEOMETRY pLCHSGeometry)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    LogFlow(("%s:\n", __FUNCTION__));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMIMEDIA_2_VBOXDISK(pInterface);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    int rc = VDGetLCHSGeometry(pThis->pDisk, VD_LAST_IMAGE, pLCHSGeometry);
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync    if (RT_FAILURE(rc))
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync    {
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync        Log(("%s: geometry not available.\n", __FUNCTION__));
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync        rc = VERR_PDM_GEOMETRY_NOT_SET;
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync    }
fe813b3594039ba864493438e78ee0e7132bc445vboxsync    LogFlow(("%s: returns %Rrc (CHS=%d/%d/%d)\n", __FUNCTION__,
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync             rc, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    return rc;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync/** @copydoc PDMIMEDIA::pfnBiosSetLCHSGeometry */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(int) drvvdBiosSetLCHSGeometry(PPDMIMEDIA pInterface,
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync                                                  PCPDMMEDIAGEOMETRY pLCHSGeometry)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync    LogFlow(("%s: CHS=%d/%d/%d\n", __FUNCTION__,
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync             pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMIMEDIA_2_VBOXDISK(pInterface);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    int rc = VDSetLCHSGeometry(pThis->pDisk, VD_LAST_IMAGE, pLCHSGeometry);
fe813b3594039ba864493438e78ee0e7132bc445vboxsync    LogFlow(("%s: returns %Rrc\n", __FUNCTION__, rc));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    return rc;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/** @copydoc PDMIMEDIA::pfnGetUuid */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(int) drvvdGetUuid(PPDMIMEDIA pInterface, PRTUUID pUuid)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    LogFlow(("%s:\n", __FUNCTION__));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMIMEDIA_2_VBOXDISK(pInterface);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    int rc = VDGetUuid(pThis->pDisk, 0, pUuid);
af90f37ee9175da3aed36bda13519a917cc4effbvboxsync    LogFlow(("%s: returns %Rrc ({%RTuuid})\n", __FUNCTION__, rc, pUuid));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    return rc;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync/*******************************************************************************
9496f2d398b49813176939d7a339ae513d5175efvboxsync*   Async Media interface methods                                              *
9496f2d398b49813176939d7a339ae513d5175efvboxsync*******************************************************************************/
9496f2d398b49813176939d7a339ae513d5175efvboxsync
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsyncstatic DECLCALLBACK(int) drvvdStartRead(PPDMIMEDIAASYNC pInterface, uint64_t uOffset,
9496f2d398b49813176939d7a339ae513d5175efvboxsync                                        PPDMDATASEG paSeg, unsigned cSeg,
9496f2d398b49813176939d7a339ae513d5175efvboxsync                                        size_t cbRead, void *pvUser)
9496f2d398b49813176939d7a339ae513d5175efvboxsync{
9496f2d398b49813176939d7a339ae513d5175efvboxsync     LogFlow(("%s: uOffset=%#llx paSeg=%#p cSeg=%u cbRead=%d\n pvUser=%#p", __FUNCTION__,
9496f2d398b49813176939d7a339ae513d5175efvboxsync             uOffset, paSeg, cSeg, cbRead, pvUser));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMIMEDIAASYNC_2_VBOXDISK(pInterface);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    int rc = VDAsyncRead(pThis->pDisk, uOffset, cbRead, paSeg, cSeg, pvUser);
fe813b3594039ba864493438e78ee0e7132bc445vboxsync    LogFlow(("%s: returns %Rrc\n", __FUNCTION__, rc));
9496f2d398b49813176939d7a339ae513d5175efvboxsync    return rc;
9496f2d398b49813176939d7a339ae513d5175efvboxsync}
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsyncstatic DECLCALLBACK(int) drvvdStartWrite(PPDMIMEDIAASYNC pInterface, uint64_t uOffset,
9496f2d398b49813176939d7a339ae513d5175efvboxsync                                         PPDMDATASEG paSeg, unsigned cSeg,
9496f2d398b49813176939d7a339ae513d5175efvboxsync                                         size_t cbWrite, void *pvUser)
9496f2d398b49813176939d7a339ae513d5175efvboxsync{
9496f2d398b49813176939d7a339ae513d5175efvboxsync     LogFlow(("%s: uOffset=%#llx paSeg=%#p cSeg=%u cbWrite=%d\n pvUser=%#p", __FUNCTION__,
9496f2d398b49813176939d7a339ae513d5175efvboxsync             uOffset, paSeg, cSeg, cbWrite, pvUser));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMIMEDIAASYNC_2_VBOXDISK(pInterface);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    int rc = VDAsyncWrite(pThis->pDisk, uOffset, cbWrite, paSeg, cSeg, pvUser);
fe813b3594039ba864493438e78ee0e7132bc445vboxsync    LogFlow(("%s: returns %Rrc\n", __FUNCTION__, rc));
9496f2d398b49813176939d7a339ae513d5175efvboxsync    return rc;
9496f2d398b49813176939d7a339ae513d5175efvboxsync}
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync/*******************************************************************************
9496f2d398b49813176939d7a339ae513d5175efvboxsync*   Async transport port interface methods                                     *
9496f2d398b49813176939d7a339ae513d5175efvboxsync*******************************************************************************/
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsyncstatic DECLCALLBACK(int) drvvdTasksCompleteNotify(PPDMITRANSPORTASYNCPORT pInterface, void *pvUser)
9496f2d398b49813176939d7a339ae513d5175efvboxsync{
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMITRANSPORTASYNCPORT_2_VBOXDISK(pInterface);
9496f2d398b49813176939d7a339ae513d5175efvboxsync    PDRVVDASYNCTASK pDrvVDAsyncTask = (PDRVVDASYNCTASK)pvUser;
9496f2d398b49813176939d7a339ae513d5175efvboxsync    int rc = VINF_VDI_ASYNC_IO_FINISHED;
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /* Having a completion callback for a task is not mandatory. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    if (pDrvVDAsyncTask->pfnCompleted)
9496f2d398b49813176939d7a339ae513d5175efvboxsync        rc = pDrvVDAsyncTask->pfnCompleted(pDrvVDAsyncTask->pvUser);
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /* Check if the request is finished. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    if (rc == VINF_VDI_ASYNC_IO_FINISHED)
9496f2d398b49813176939d7a339ae513d5175efvboxsync    {
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync        rc = pThis->pDrvMediaAsyncPort->pfnTransferCompleteNotify(pThis->pDrvMediaAsyncPort, pDrvVDAsyncTask->pvUserCaller);
9496f2d398b49813176939d7a339ae513d5175efvboxsync    }
9496f2d398b49813176939d7a339ae513d5175efvboxsync    else if (rc == VERR_VDI_ASYNC_IO_IN_PROGRESS)
9496f2d398b49813176939d7a339ae513d5175efvboxsync        rc = VINF_SUCCESS;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    rc = RTCacheInsert(pThis->pCache, pDrvVDAsyncTask);
9496f2d398b49813176939d7a339ae513d5175efvboxsync    AssertRC(rc);
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    return rc;
9496f2d398b49813176939d7a339ae513d5175efvboxsync}
9496f2d398b49813176939d7a339ae513d5175efvboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/*******************************************************************************
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync*   Base interface methods                                                     *
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync*******************************************************************************/
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/** @copydoc PDMIBASE::pfnQueryInterface */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(void *) drvvdQueryInterface(PPDMIBASE pInterface,
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync                                                PDMINTERFACE enmInterface)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    PPDMDRVINS pDrvIns = PDMIBASE_2_DRVINS(pInterface);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMINS_2_DATA(pDrvIns, PVBOXDISK);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    switch (enmInterface)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    {
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        case PDMINTERFACE_BASE:
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            return &pDrvIns->IBase;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        case PDMINTERFACE_MEDIA:
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync            return &pThis->IMedia;
9496f2d398b49813176939d7a339ae513d5175efvboxsync        case PDMINTERFACE_MEDIA_ASYNC:
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync            return pThis->fAsyncIOSupported ? &pThis->IMediaAsync : NULL;
9496f2d398b49813176939d7a339ae513d5175efvboxsync        case PDMINTERFACE_TRANSPORT_ASYNC_PORT:
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync            return &pThis->ITransportAsyncPort;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        default:
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            return NULL;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/*******************************************************************************
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync*   Driver methods                                                             *
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync*******************************************************************************/
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/**
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * Construct a VBox disk media driver instance.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync *
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * @returns VBox status.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * @param   pDrvIns     The driver instance data.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync *                      If the registration structure is needed, pDrvIns->pDrvReg points to it.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * @param   pCfgHandle  Configuration node handle for the driver. Use this to obtain the configuration
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync *                      of the driver instance. It's also found in pDrvIns->pCfgHandle as it's expected
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync *                      to be used frequently in this function.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(int) drvvdConstruct(PPDMDRVINS pDrvIns,
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync                                        PCFGMNODE pCfgHandle)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    LogFlow(("%s:\n", __FUNCTION__));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMINS_2_DATA(pDrvIns, PVBOXDISK);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    int rc = VINF_SUCCESS;
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync    char *pszName = NULL;   /**< The path of the disk image file. */
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync    char *pszFormat = NULL; /**< The format backed to use for this image. */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    bool fReadOnly;         /**< True if the media is readonly. */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    bool fHonorZeroWrites;  /**< True if zero blocks should be written. */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /*
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync     * Init the static parts.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync     */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync    pDrvIns->IBase.pfnQueryInterface    = drvvdQueryInterface;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->pDrvIns                      = pDrvIns;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->fTempReadOnly                = false;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->pDisk                        = NULL;
090d729e786b999dc285f8ea267f9effd1319544vboxsync    pThis->fAsyncIOSupported            = false;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* IMedia */
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->IMedia.pfnRead               = drvvdRead;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->IMedia.pfnWrite              = drvvdWrite;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->IMedia.pfnFlush              = drvvdFlush;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->IMedia.pfnGetSize            = drvvdGetSize;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->IMedia.pfnIsReadOnly         = drvvdIsReadOnly;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->IMedia.pfnBiosGetPCHSGeometry = drvvdBiosGetPCHSGeometry;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->IMedia.pfnBiosSetPCHSGeometry = drvvdBiosSetPCHSGeometry;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->IMedia.pfnBiosGetLCHSGeometry = drvvdBiosGetLCHSGeometry;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->IMedia.pfnBiosSetLCHSGeometry = drvvdBiosSetLCHSGeometry;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->IMedia.pfnGetUuid            = drvvdGetUuid;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /* IMediaAsync */
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->IMediaAsync.pfnStartRead       = drvvdStartRead;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->IMediaAsync.pfnStartWrite      = drvvdStartWrite;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /* ITransportAsyncPort */
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->ITransportAsyncPort.pfnTaskCompleteNotify  = drvvdTasksCompleteNotify;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /* Initialize supported VD interfaces. */
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    pThis->pVDIfsDisk = NULL;
68a4ee3a31a0807abd03eae881c1bbaf4d42ee6dvboxsync
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIErrorCallbacks.cbSize       = sizeof(VDINTERFACEERROR);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIErrorCallbacks.enmInterface = VDINTERFACETYPE_ERROR;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIErrorCallbacks.pfnError     = drvvdErrorCallback;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
68a4ee3a31a0807abd03eae881c1bbaf4d42ee6dvboxsync    rc = VDInterfaceAdd(&pThis->VDIError, "DrvVD_VDIError", VDINTERFACETYPE_ERROR,
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync                        &pThis->VDIErrorCallbacks, pDrvIns, &pThis->pVDIfsDisk);
9496f2d398b49813176939d7a339ae513d5175efvboxsync    AssertRC(rc);
9496f2d398b49813176939d7a339ae513d5175efvboxsync
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIAsyncIOCallbacks.cbSize                  = sizeof(VDINTERFACEASYNCIO);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIAsyncIOCallbacks.enmInterface            = VDINTERFACETYPE_ASYNCIO;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIAsyncIOCallbacks.pfnOpen                 = drvvdAsyncIOOpen;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIAsyncIOCallbacks.pfnClose                = drvvdAsyncIOClose;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIAsyncIOCallbacks.pfnRead                 = drvvdAsyncIORead;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIAsyncIOCallbacks.pfnWrite                = drvvdAsyncIOWrite;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIAsyncIOCallbacks.pfnFlush                = drvvdAsyncIOFlush;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIAsyncIOCallbacks.pfnPrepareRead          = drvvdAsyncIOPrepareRead;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIAsyncIOCallbacks.pfnPrepareWrite         = drvvdAsyncIOPrepareWrite;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIAsyncIOCallbacks.pfnTasksSubmit          = drvvdAsyncIOTasksSubmit;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync
68a4ee3a31a0807abd03eae881c1bbaf4d42ee6dvboxsync    rc = VDInterfaceAdd(&pThis->VDIAsyncIO, "DrvVD_AsyncIO", VDINTERFACETYPE_ASYNCIO,
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync                        &pThis->VDIAsyncIOCallbacks, pThis, &pThis->pVDIfsDisk);
9496f2d398b49813176939d7a339ae513d5175efvboxsync    AssertRC(rc);
9496f2d398b49813176939d7a339ae513d5175efvboxsync
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    /* This is just prepared here, the actual interface is per-image, so it's
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync     * added later. No need to have separate callback tables. */
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIConfigCallbacks.cbSize                = sizeof(VDINTERFACECONFIG);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIConfigCallbacks.enmInterface          = VDINTERFACETYPE_CONFIG;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIConfigCallbacks.pfnAreValuesValid     = drvvdCfgAreValuesValid;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIConfigCallbacks.pfnQueryType          = drvvdCfgQueryType;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIConfigCallbacks.pfnQuerySize          = drvvdCfgQuerySize;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIConfigCallbacks.pfnQueryInteger       = drvvdCfgQueryInteger;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIConfigCallbacks.pfnQueryIntegerDef    = drvvdCfgQueryIntegerDef;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIConfigCallbacks.pfnQueryString        = drvvdCfgQueryString;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIConfigCallbacks.pfnQueryStringDef     = drvvdCfgQueryStringDef;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->VDIConfigCallbacks.pfnQueryBytes         = drvvdCfgQueryBytes;
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    /* List of images is empty now. */
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    pThis->pImages = NULL;
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /* Try to attach async media port interface above.*/
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    pThis->pDrvMediaAsyncPort = (PPDMIMEDIAASYNCPORT)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase, PDMINTERFACE_MEDIA_ASYNC_PORT);
9496f2d398b49813176939d7a339ae513d5175efvboxsync
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync    /*
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync     * Attach the async transport driver below if the device above us implements the
9496f2d398b49813176939d7a339ae513d5175efvboxsync     * async interface.
9496f2d398b49813176939d7a339ae513d5175efvboxsync     */
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    if (pThis->pDrvMediaAsyncPort)
9496f2d398b49813176939d7a339ae513d5175efvboxsync    {
9496f2d398b49813176939d7a339ae513d5175efvboxsync        /* Try to attach the driver. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync        PPDMIBASE pBase;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync        rc = pDrvIns->pDrvHlp->pfnAttach(pDrvIns, &pBase);
9496f2d398b49813176939d7a339ae513d5175efvboxsync        if (rc == VERR_PDM_NO_ATTACHED_DRIVER)
9496f2d398b49813176939d7a339ae513d5175efvboxsync        {
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync            /*
090d729e786b999dc285f8ea267f9effd1319544vboxsync             * Though the device supports async I/O there is no transport driver
090d729e786b999dc285f8ea267f9effd1319544vboxsync             * which processes async requests.
9496f2d398b49813176939d7a339ae513d5175efvboxsync             * Revert to non async I/O.
9496f2d398b49813176939d7a339ae513d5175efvboxsync             */
090d729e786b999dc285f8ea267f9effd1319544vboxsync            rc = VINF_SUCCESS;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync            pThis->pDrvMediaAsyncPort = NULL;
090d729e786b999dc285f8ea267f9effd1319544vboxsync            pThis->fAsyncIOSupported = false;
9496f2d398b49813176939d7a339ae513d5175efvboxsync        }
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync        else if (RT_FAILURE(rc))
9496f2d398b49813176939d7a339ae513d5175efvboxsync        {
fe813b3594039ba864493438e78ee0e7132bc445vboxsync            AssertMsgFailed(("Failed to attach async transport driver below rc=%Rrc\n", rc));
9496f2d398b49813176939d7a339ae513d5175efvboxsync        }
9496f2d398b49813176939d7a339ae513d5175efvboxsync        else
9496f2d398b49813176939d7a339ae513d5175efvboxsync        {
090d729e786b999dc285f8ea267f9effd1319544vboxsync            /*
090d729e786b999dc285f8ea267f9effd1319544vboxsync             * The device supports async I/O and we successfully attached the transport driver.
090d729e786b999dc285f8ea267f9effd1319544vboxsync             * Indicate that async I/O is supported for now as we check if the image backend supports
090d729e786b999dc285f8ea267f9effd1319544vboxsync             * it later.
090d729e786b999dc285f8ea267f9effd1319544vboxsync             */
090d729e786b999dc285f8ea267f9effd1319544vboxsync            pThis->fAsyncIOSupported = true;
090d729e786b999dc285f8ea267f9effd1319544vboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync            /* Success query the async transport interface. */
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync            pThis->pDrvTransportAsync = (PPDMITRANSPORTASYNC)pBase->pfnQueryInterface(pBase, PDMINTERFACE_TRANSPORT_ASYNC);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync            if (!pThis->pDrvTransportAsync)
9496f2d398b49813176939d7a339ae513d5175efvboxsync            {
090d729e786b999dc285f8ea267f9effd1319544vboxsync                /* An attached driver without an async transport interface - impossible. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync                AssertMsgFailed(("Configuration error: No async transport interface below!\n"));
9496f2d398b49813176939d7a339ae513d5175efvboxsync                return VERR_PDM_MISSING_INTERFACE_ABOVE;
9496f2d398b49813176939d7a339ae513d5175efvboxsync            }
9496f2d398b49813176939d7a339ae513d5175efvboxsync        }
9496f2d398b49813176939d7a339ae513d5175efvboxsync    }
9496f2d398b49813176939d7a339ae513d5175efvboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /*
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync     * Validate configuration and find all parent images.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync     * It's sort of up side down from the image dependency tree.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync     */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync    bool        fHostIP = false;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    unsigned    iLevel = 0;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    PCFGMNODE   pCurNode = pCfgHandle;
090d729e786b999dc285f8ea267f9effd1319544vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    for (;;)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    {
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        bool fValid;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        if (pCurNode == pCfgHandle)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        {
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync            /* Toplevel configuration additionally contains the global image
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync             * open flags. Some might be converted to per-image flags later. */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            fValid = CFGMR3AreValuesValid(pCurNode,
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync                                          "Format\0Path\0"
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync                                          "ReadOnly\0HonorZeroWrites\0"
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync                                          "HostIPStack\0");
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            rc = CFGMR3QueryBool(pCfgHandle, "HostIPStack", &fHostIP);
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            if (rc == VERR_CFGM_VALUE_NOT_FOUND)
3858c38e71b06f72b8747e37973c71b433199f32vboxsync            {
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync                fHostIP = true;
3858c38e71b06f72b8747e37973c71b433199f32vboxsync                rc = VINF_SUCCESS;
3858c38e71b06f72b8747e37973c71b433199f32vboxsync            }
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            else if (RT_FAILURE(rc))
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            {
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync                rc = PDMDRV_SET_ERROR(pDrvIns, rc,
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync                                      N_("DrvVD: Configuration error: Querying \"HostIPStack\" as boolean failed"));
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync                break;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        else
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        {
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync            /* All other image configurations only contain image name and
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync             * the format information. */
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync            fValid = CFGMR3AreValuesValid(pCurNode, "Format\0Path\0");
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        if (!fValid)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        {
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            rc = PDMDrvHlpVMSetError(pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync                                     RT_SRC_POS, N_("DrvVD: Configuration error: keys incorrect at level %d"), iLevel);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            break;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        PCFGMNODE pParent = CFGMR3GetChild(pCurNode, "Parent");
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        if (!pParent)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            break;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        pCurNode = pParent;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        iLevel++;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /*
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync     * Open the images.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync     */
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync    if (RT_SUCCESS(rc))
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    {
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        /* First of all figure out what kind of TCP networking stack interface
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync         * to use. This is done unconditionally, as backends which don't need
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync         * it will just ignore it. */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        if (fHostIP)
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        {
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.cbSize = sizeof(VDINTERFACETCPNET);
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.enmInterface = VDINTERFACETYPE_TCPNET;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.pfnClientConnect = RTTcpClientConnect;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.pfnClientClose = RTTcpClientClose;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.pfnSelectOne = RTTcpSelectOne;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.pfnRead = RTTcpRead;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.pfnWrite = RTTcpWrite;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.pfnFlush = RTTcpFlush;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        }
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        else
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        {
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync#ifdef VBOX_OSE
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync            rc = PDMDrvHlpVMSetError(pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES,
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync                                     RT_SRC_POS, N_("DrvVD: Configuration error: TCP over Internal Networking not supported in VirtualBox OSE"));
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync#else /* !VBOX_OSE */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.cbSize = sizeof(VDINTERFACETCPNET);
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.enmInterface = VDINTERFACETYPE_TCPNET;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.pfnClientConnect = drvvdINIPClientConnect;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.pfnClientClose = drvvdINIPClientClose;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.pfnSelectOne = drvvdINIPSelectOne;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.pfnRead = drvvdINIPRead;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.pfnWrite = drvvdINIPWrite;
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync            pThis->VDITcpNetCallbacks.pfnFlush = drvvdINIPFlush;
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync#endif /* !VBOX_OSE */
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync        }
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync        if (RT_SUCCESS(rc))
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync        {
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync            rc = VDInterfaceAdd(&pThis->VDITcpNet, "DrvVD_INIP",
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync                                VDINTERFACETYPE_TCPNET,
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync                                &pThis->VDITcpNetCallbacks, NULL,
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync                                &pThis->pVDIfsDisk);
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync        }
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync        if (RT_SUCCESS(rc))
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync        {
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync            rc = VDCreate(pThis->pVDIfsDisk, &pThis->pDisk);
a3369a746b56a8966dd78619f4d191c9662f400dvboxsync            /* Error message is already set correctly. */
51fe8789a74f6c118894aaa12eb69ec155386dbdvboxsync        }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync    while (pCurNode && RT_SUCCESS(rc))
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    {
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        /* Allocate per-image data. */
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        PVBOXIMAGE pImage = drvvdNewImage(pThis);
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        if (!pImage)
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        {
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync            rc = VERR_NO_MEMORY;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync            break;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        }
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        /*
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync         * Read the image configuration.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync         */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        rc = CFGMR3QueryStringAlloc(pCurNode, "Path", &pszName);
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync        if (RT_FAILURE(rc))
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        {
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            rc = PDMDRV_SET_ERROR(pDrvIns, rc,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync                                  N_("DrvVD: Configuration error: Querying \"Path\" as string failed"));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            break;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync        rc = CFGMR3QueryStringAlloc(pCfgHandle, "Format", &pszFormat);
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync        if (RT_FAILURE(rc))
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync        {
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync            rc = PDMDRV_SET_ERROR(pDrvIns, rc,
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync                                  N_("DrvVD: Configuration error: Querying \"Format\" as string failed"));
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync            break;
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync        }
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        if (iLevel == 0)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        {
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            rc = CFGMR3QueryBool(pCurNode, "ReadOnly", &fReadOnly);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            if (rc == VERR_CFGM_VALUE_NOT_FOUND)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync                fReadOnly = false;
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync            else if (RT_FAILURE(rc))
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            {
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync                rc = PDMDRV_SET_ERROR(pDrvIns, rc,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync                                      N_("DrvVD: Configuration error: Querying \"ReadOnly\" as boolean failed"));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync                break;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            rc = CFGMR3QueryBool(pCfgHandle, "HonorZeroWrites", &fHonorZeroWrites);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            if (rc == VERR_CFGM_VALUE_NOT_FOUND)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync                fHonorZeroWrites = false;
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync            else if (RT_FAILURE(rc))
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            {
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync                rc = PDMDRV_SET_ERROR(pDrvIns, rc,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync                                      N_("DrvVD: Configuration error: Querying \"HonorZeroWrites\" as boolean failed"));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync                break;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        else
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        {
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            fReadOnly = true;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            fHonorZeroWrites = false;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        PCFGMNODE pCfg = CFGMR3GetChild(pCurNode, "VDConfig");
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        rc = VDInterfaceAdd(&pImage->VDIConfig, "DrvVD_Config", VDINTERFACETYPE_CONFIG,
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync                            &pThis->VDIConfigCallbacks, pCfg, &pImage->pVDIfsImage);
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        AssertRC(rc);
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        /*
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync         * Open the image.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync         */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        unsigned uOpenFlags;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        if (fReadOnly)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            uOpenFlags = VD_OPEN_FLAGS_READONLY;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        else
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            uOpenFlags = VD_OPEN_FLAGS_NORMAL;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        if (fHonorZeroWrites)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            uOpenFlags |= VD_OPEN_FLAGS_HONOR_ZEROES;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync        if (pThis->pDrvMediaAsyncPort)
9496f2d398b49813176939d7a339ae513d5175efvboxsync            uOpenFlags |= VD_OPEN_FLAGS_ASYNC_IO;
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync        /** Try to open backend in asyc I/O mode first. */
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        rc = VDOpen(pThis->pDisk, pszFormat, pszName, uOpenFlags, pImage->pVDIfsImage);
9496f2d398b49813176939d7a339ae513d5175efvboxsync        if (rc == VERR_NOT_SUPPORTED)
9496f2d398b49813176939d7a339ae513d5175efvboxsync        {
9c149a2789022f5011e88fb62f02a1cc8068e88fvboxsync            /* Seems async I/O is not supported by the backend, open in normal mode. */
9496f2d398b49813176939d7a339ae513d5175efvboxsync            uOpenFlags &= ~VD_OPEN_FLAGS_ASYNC_IO;
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync            rc = VDOpen(pThis->pDisk, pszFormat, pszName, uOpenFlags, pImage->pVDIfsImage);
9496f2d398b49813176939d7a339ae513d5175efvboxsync        }
9496f2d398b49813176939d7a339ae513d5175efvboxsync
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync        if (RT_SUCCESS(rc))
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync            Log(("%s: %d - Opened '%s' in %s mode\n", __FUNCTION__,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync                 iLevel, pszName,
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync                 VDIsReadOnly(pThis->pDisk) ? "read-only" : "read-write"));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        else
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        {
927320c7f81d3acdbccb5f3fea7548b4b7184b98vboxsync           rc = PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
927320c7f81d3acdbccb5f3fea7548b4b7184b98vboxsync                                    N_("Failed to open image '%s' in %s mode rc=%Rrc\n"), pszName,
927320c7f81d3acdbccb5f3fea7548b4b7184b98vboxsync                                    (uOpenFlags & VD_OPEN_FLAGS_READONLY) ? "readonly" : "read-write", rc);
9496f2d398b49813176939d7a339ae513d5175efvboxsync           break;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        }
9496f2d398b49813176939d7a339ae513d5175efvboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        MMR3HeapFree(pszName);
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync        pszName = NULL;
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync        MMR3HeapFree(pszFormat);
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync        pszFormat = NULL;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        /* next */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        iLevel--;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        pCurNode = CFGMR3GetParent(pCurNode);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync    if (RT_FAILURE(rc))
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync    {
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync        if (VALID_PTR(pThis->pDisk))
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync        {
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync            VDDestroy(pThis->pDisk);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync            pThis->pDisk = NULL;
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync        }
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync        drvvdFreeImages(pThis);
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync        if (VALID_PTR(pszName))
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync            MMR3HeapFree(pszName);
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync        if (VALID_PTR(pszFormat))
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync            MMR3HeapFree(pszFormat);
9a1ffdf6460d98ab356438aaa25b1115b0a72558vboxsync
9a1ffdf6460d98ab356438aaa25b1115b0a72558vboxsync        return rc;
d9d5fbda1b8f7a6f7fae555db60d0e636fd03af8vboxsync    }
090d729e786b999dc285f8ea267f9effd1319544vboxsync    else
9496f2d398b49813176939d7a339ae513d5175efvboxsync    {
090d729e786b999dc285f8ea267f9effd1319544vboxsync        /*
090d729e786b999dc285f8ea267f9effd1319544vboxsync         * Check if every opened image supports async I/O.
090d729e786b999dc285f8ea267f9effd1319544vboxsync         * If not we revert to non async I/O.
090d729e786b999dc285f8ea267f9effd1319544vboxsync         */
090d729e786b999dc285f8ea267f9effd1319544vboxsync        if (pThis->fAsyncIOSupported)
9496f2d398b49813176939d7a339ae513d5175efvboxsync        {
090d729e786b999dc285f8ea267f9effd1319544vboxsync            for (unsigned i = 0; i < VDGetCount(pThis->pDisk); i++)
090d729e786b999dc285f8ea267f9effd1319544vboxsync            {
090d729e786b999dc285f8ea267f9effd1319544vboxsync                VDBACKENDINFO vdBackendInfo;
090d729e786b999dc285f8ea267f9effd1319544vboxsync
090d729e786b999dc285f8ea267f9effd1319544vboxsync                rc = VDBackendInfoSingle(pThis->pDisk, i, &vdBackendInfo);
090d729e786b999dc285f8ea267f9effd1319544vboxsync                AssertRC(rc);
090d729e786b999dc285f8ea267f9effd1319544vboxsync
090d729e786b999dc285f8ea267f9effd1319544vboxsync                if (vdBackendInfo.uBackendCaps & VD_CAP_ASYNC)
090d729e786b999dc285f8ea267f9effd1319544vboxsync                {
090d729e786b999dc285f8ea267f9effd1319544vboxsync                    /*
090d729e786b999dc285f8ea267f9effd1319544vboxsync                     * Backend indicates support for at least some files.
090d729e786b999dc285f8ea267f9effd1319544vboxsync                     * Check if current file is supported with async I/O)
090d729e786b999dc285f8ea267f9effd1319544vboxsync                     */
090d729e786b999dc285f8ea267f9effd1319544vboxsync                    rc = VDImageIsAsyncIOSupported(pThis->pDisk, i, &pThis->fAsyncIOSupported);
090d729e786b999dc285f8ea267f9effd1319544vboxsync                    AssertRC(rc);
090d729e786b999dc285f8ea267f9effd1319544vboxsync
090d729e786b999dc285f8ea267f9effd1319544vboxsync                    /*
090d729e786b999dc285f8ea267f9effd1319544vboxsync                     * Check if current image is supported.
090d729e786b999dc285f8ea267f9effd1319544vboxsync                     * If not we can stop checking because
090d729e786b999dc285f8ea267f9effd1319544vboxsync                     * at least one does not support it.
090d729e786b999dc285f8ea267f9effd1319544vboxsync                     */
090d729e786b999dc285f8ea267f9effd1319544vboxsync                    if (!pThis->fAsyncIOSupported)
090d729e786b999dc285f8ea267f9effd1319544vboxsync                        break;
090d729e786b999dc285f8ea267f9effd1319544vboxsync                }
090d729e786b999dc285f8ea267f9effd1319544vboxsync                else
090d729e786b999dc285f8ea267f9effd1319544vboxsync                {
090d729e786b999dc285f8ea267f9effd1319544vboxsync                    pThis->fAsyncIOSupported = false;
090d729e786b999dc285f8ea267f9effd1319544vboxsync                    break;
090d729e786b999dc285f8ea267f9effd1319544vboxsync                }
090d729e786b999dc285f8ea267f9effd1319544vboxsync            }
9496f2d398b49813176939d7a339ae513d5175efvboxsync        }
090d729e786b999dc285f8ea267f9effd1319544vboxsync
090d729e786b999dc285f8ea267f9effd1319544vboxsync        /*
090d729e786b999dc285f8ea267f9effd1319544vboxsync         * We know definitly if async I/O is supported now.
77b1a2d8b5dbe2c0b5200794914239fee3c8ee5dvboxsync         * Create cache if it is supported.
090d729e786b999dc285f8ea267f9effd1319544vboxsync         */
090d729e786b999dc285f8ea267f9effd1319544vboxsync        if (pThis->fAsyncIOSupported)
9496f2d398b49813176939d7a339ae513d5175efvboxsync        {
090d729e786b999dc285f8ea267f9effd1319544vboxsync            rc = RTCacheCreate(&pThis->pCache, 0, sizeof(DRVVDASYNCTASK), RTOBJCACHE_PROTECT_INSERT);
3bf9ff5b4c2da22ac8dce07123e55c2cec55d483vboxsync            AssertMsgRC(rc, ("Failed to create cache rc=%Rrc\n", rc));
9496f2d398b49813176939d7a339ae513d5175efvboxsync        }
9496f2d398b49813176939d7a339ae513d5175efvboxsync    }
9496f2d398b49813176939d7a339ae513d5175efvboxsync
fe813b3594039ba864493438e78ee0e7132bc445vboxsync    LogFlow(("%s: returns %Rrc\n", __FUNCTION__, rc));
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    return rc;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/**
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * Destruct a driver instance.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync *
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * Most VM resources are freed by the VM. This callback is provided so that any non-VM
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * resources can be freed correctly.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync *
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * @param   pDrvIns     The driver instance data.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(void) drvvdDestruct(PPDMDRVINS pDrvIns)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
9496f2d398b49813176939d7a339ae513d5175efvboxsync    int rc;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMINS_2_DATA(pDrvIns, PVBOXDISK);
9496f2d398b49813176939d7a339ae513d5175efvboxsync    LogFlow(("%s:\n", __FUNCTION__));
05d0c18daabd17b1b434b3684ae642fbc8313ef2vboxsync
d80c85a1bc7317da7d0cd1254fae6a20db039c8cvboxsync    drvvdFreeImages(pThis);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    if (pThis->pCache)
05d0c18daabd17b1b434b3684ae642fbc8313ef2vboxsync    {
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync        rc = RTCacheDestroy(pThis->pCache);
05d0c18daabd17b1b434b3684ae642fbc8313ef2vboxsync        AssertRC(rc);
05d0c18daabd17b1b434b3684ae642fbc8313ef2vboxsync    }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/**
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * When the VM has been suspended we'll change the image mode to read-only
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * so that main and others can read the VDIs. This is important when
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * saving state and so forth.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync *
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * @param   pDrvIns     The driver instance data.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(void) drvvdSuspend(PPDMDRVINS pDrvIns)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    LogFlow(("%s:\n", __FUNCTION__));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMINS_2_DATA(pDrvIns, PVBOXDISK);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    if (!VDIsReadOnly(pThis->pDisk))
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    {
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        unsigned uOpenFlags;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync        int rc = VDGetOpenFlags(pThis->pDisk, VD_LAST_IMAGE, &uOpenFlags);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        AssertRC(rc);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        uOpenFlags |= VD_OPEN_FLAGS_READONLY;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync        rc = VDSetOpenFlags(pThis->pDisk, VD_LAST_IMAGE, uOpenFlags);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        AssertRC(rc);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync        pThis->fTempReadOnly = true;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/**
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * Before the VM resumes we'll have to undo the read-only mode change
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync * done in drvvdSuspend.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync *
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * @param   pDrvIns     The driver instance data.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsyncstatic DECLCALLBACK(void) drvvdResume(PPDMDRVINS pDrvIns)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    LogFlow(("%s:\n", __FUNCTION__));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMINS_2_DATA(pDrvIns, PVBOXDISK);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    if (pThis->fTempReadOnly)
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    {
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        unsigned uOpenFlags;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync        int rc = VDGetOpenFlags(pThis->pDisk, VD_LAST_IMAGE, &uOpenFlags);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        AssertRC(rc);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        uOpenFlags &= ~VD_OPEN_FLAGS_READONLY;
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync        rc = VDSetOpenFlags(pThis->pDisk, VD_LAST_IMAGE, uOpenFlags);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync        AssertRC(rc);
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync        pThis->fTempReadOnly = false;
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    }
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
9496f2d398b49813176939d7a339ae513d5175efvboxsyncstatic DECLCALLBACK(void) drvvdPowerOff(PPDMDRVINS pDrvIns)
9496f2d398b49813176939d7a339ae513d5175efvboxsync{
9496f2d398b49813176939d7a339ae513d5175efvboxsync    LogFlow(("%s:\n", __FUNCTION__));
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    PVBOXDISK pThis = PDMINS_2_DATA(pDrvIns, PVBOXDISK);
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
b7a5b3f9f9ecce32ddacf8404c625ce0451bbdc1vboxsync    /*
9496f2d398b49813176939d7a339ae513d5175efvboxsync     * We must close the disk here to ensure that
9496f2d398b49813176939d7a339ae513d5175efvboxsync     * the backend closes all files before the
9496f2d398b49813176939d7a339ae513d5175efvboxsync     * async transport driver is destructed.
9496f2d398b49813176939d7a339ae513d5175efvboxsync     */
548ca31b6b47c36bacce49bed3339cb8075b9681vboxsync    int rc = VDCloseAll(pThis->pDisk);
9496f2d398b49813176939d7a339ae513d5175efvboxsync    AssertRC(rc);
9496f2d398b49813176939d7a339ae513d5175efvboxsync}
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync/**
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync * VBox disk container media driver registration record.
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsyncconst PDMDRVREG g_DrvVD =
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync{
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* u32Version */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    PDM_DRVREG_VERSION,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* szDriverName */
09127e6ed46502ff8a6a521713ee8ace53667683vboxsync    "VD",
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* pszDescription */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    "Generic VBox disk media driver.",
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* fFlags */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* fClass. */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    PDM_DRVREG_CLASS_MEDIA,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* cMaxInstances */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    ~0,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* cbInstance */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    sizeof(VBOXDISK),
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* pfnConstruct */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync    drvvdConstruct,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* pfnDestruct */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync    drvvdDestruct,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* pfnIOCtl */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    NULL,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* pfnPowerOn */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    NULL,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* pfnReset */
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    NULL,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* pfnSuspend */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync    drvvdSuspend,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* pfnResume */
8083a259c13e6e26e56ca2582edbad4a8cfac25avboxsync    drvvdResume,
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync    /* pfnDetach */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    NULL,
9496f2d398b49813176939d7a339ae513d5175efvboxsync    /* pfnPowerOff */
9496f2d398b49813176939d7a339ae513d5175efvboxsync    drvvdPowerOff
a0240ff4f7663045c848fdbc192ea3d4d9f70a11vboxsync};