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/** @file
* VD: Plugin support API.
*/
/*
* Copyright (C) 2006-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
#ifndef VBOX_INCLUDED_vd_plugin_h
#define VBOX_INCLUDED_vd_plugin_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <VBox/vd.h>
#include <VBox/vd-common.h>
#include <VBox/vd-image-backend.h>
#include <VBox/vd-cache-backend.h>
#include <VBox/vd-filter-backend.h>
/**
* Backend register callbacks structure.
*/
typedef struct VDBACKENDREGISTER
{
/** Interface version.
* This is set to VD_BACKENDREG_CB_VERSION. */
uint32_t u32Version;
/**
* Registers a new image backend.
*
* @returns VBox status code.
* @param pvUser Opaque user data given in the plugin load callback.
* @param pBackend The image backend to register.
*/
DECLR3CALLBACKMEMBER(int, pfnRegisterImage, (void *pvUser, PCVDIMAGEBACKEND pBackend));
/**
* Registers a new cache backend.
*
* @returns VBox status code.
* @param pvUser Opaque user data given in the plugin load callback.
* @param pBackend The cache backend to register.
*/
DECLR3CALLBACKMEMBER(int, pfnRegisterCache, (void *pvUser, PCVDCACHEBACKEND pBackend));
/**
* Registers a new filter plugin.
* @param pvUser Opaque user data given in the plugin load callback.
* @param pBackend The filter backend to register.
*/
DECLR3CALLBACKMEMBER(int, pfnRegisterFilter, (void *pvUser, PCVDFILTERBACKEND pBackend));
} VDBACKENDREGISTER;
/** Pointer to a backend register callbacks structure. */
typedef VDBACKENDREGISTER *PVDBACKENDREGISTER;
/** Current version of the VDBACKENDREGISTER structure. */
#define VD_BACKENDREG_CB_VERSION VD_VERSION_MAKE(0xff00, 1, 0)
/**
* Initialization entry point called by the generic VD layer when
* a plugin is loaded.
*
* @returns VBox status code.
* @param pvUser Opaque user data passed in the register callbacks.
* @param pRegisterCallbacks Pointer to the register callbacks structure.
*/
typedef DECLCALLBACK(int) FNVDPLUGINLOAD(void *pvUser, PVDBACKENDREGISTER pRegisterCallbacks);
typedef FNVDPLUGINLOAD *PFNVDPLUGINLOAD;
#define VD_PLUGIN_LOAD_NAME "VDPluginLoad"
/** The prefix to identify Storage Plugins. */
#define VD_PLUGIN_PREFIX "VDPlugin"
/** The size of the prefix excluding the '\\0' terminator. */
#define VD_PLUGIN_PREFIX_LENGTH (sizeof(VD_PLUGIN_PREFIX)-1)
#endif /* !VBOX_INCLUDED_vd_plugin_h */
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