/** @file * VD Container API - internal interfaces. */ /* * Copyright (C) 2011-2019 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * 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_ifs_internal_h #define VBOX_INCLUDED_vd_ifs_internal_h #ifndef RT_WITHOUT_PRAGMA_ONCE # pragma once #endif #include #include RT_C_DECLS_BEGIN /** * Interface to get the parent state. * * Per-operation interface. Optional, present only if there is a parent, and * used only internally for compacting. */ typedef struct VDINTERFACEPARENTSTATE { /** * Common interface header. */ VDINTERFACE Core; /** * Read data callback. * * @return VBox status code. * @return VERR_VD_NOT_OPENED if no image is opened in HDD container. * @param pvUser The opaque data passed for the operation. * @param uOffset Offset of first reading byte from start of disk. * Must be aligned to a sector boundary. * @param pvBuffer Pointer to buffer for reading data. * @param cbBuffer Number of bytes to read. * Must be aligned to a sector boundary. */ DECLR3CALLBACKMEMBER(int, pfnParentRead, (void *pvUser, uint64_t uOffset, void *pvBuffer, size_t cbBuffer)); } VDINTERFACEPARENTSTATE, *PVDINTERFACEPARENTSTATE; /** * Get parent state interface from interface list. * * @return Pointer to the first parent state interface in the list. * @param pVDIfs Pointer to the interface list. */ DECLINLINE(PVDINTERFACEPARENTSTATE) VDIfParentStateGet(PVDINTERFACE pVDIfs) { PVDINTERFACE pIf = VDInterfaceGet(pVDIfs, VDINTERFACETYPE_PARENTSTATE); /* Check that the interface descriptor is a progress interface. */ AssertMsgReturn( !pIf || ( (pIf->enmInterface == VDINTERFACETYPE_PARENTSTATE) && (pIf->cbSize == sizeof(VDINTERFACEPARENTSTATE))), ("Not a parent state interface"), NULL); return (PVDINTERFACEPARENTSTATE)pIf; } /** Forward declaration. Only visible in the VBoxHDD module. */ /** I/O context */ typedef struct VDIOCTX *PVDIOCTX; /** Storage backend handle. */ typedef struct VDIOSTORAGE *PVDIOSTORAGE; /** Pointer to a storage backend handle. */ typedef PVDIOSTORAGE *PPVDIOSTORAGE; /** * Completion callback for meta/userdata reads or writes. * * @return VBox status code. * VINF_SUCCESS if everything was successful and the transfer can continue. * VERR_VD_ASYNC_IO_IN_PROGRESS if there is another data transfer pending. * @param pBackendData The opaque backend data. * @param pIoCtx I/O context associated with this request. * @param pvUser Opaque user data passed during a read/write request. * @param rcReq Status code for the completed request. */ typedef DECLCALLBACK(int) FNVDXFERCOMPLETED(void *pBackendData, PVDIOCTX pIoCtx, void *pvUser, int rcReq); /** Pointer to FNVDXFERCOMPLETED() */ typedef FNVDXFERCOMPLETED *PFNVDXFERCOMPLETED; /** Metadata transfer handle. */ typedef struct VDMETAXFER *PVDMETAXFER; /** Pointer to a metadata transfer handle. */ typedef PVDMETAXFER *PPVDMETAXFER; /** * Internal I/O interface between the generic VD layer and the backends. * * Per-image. Always passed to backends. */ typedef struct VDINTERFACEIOINT { /** * Common interface header. */ VDINTERFACE Core; /** * Open callback * * @return VBox status code. * @param pvUser The opaque data passed on container creation. * @param pszLocation Name of the location to open. * @param fOpen Flags for opening the backend. * See RTFILE_O_* \#defines, inventing another set * of open flags is not worth the mapping effort. * @param ppStorage Where to store the storage handle. */ DECLR3CALLBACKMEMBER(int, pfnOpen, (void *pvUser, const char *pszLocation, uint32_t fOpen, PPVDIOSTORAGE ppStorage)); /** * Close callback. * * @return VBox status code. * @param pvUser The opaque data passed on container creation. * @param pStorage The storage handle to close. */ DECLR3CALLBACKMEMBER(int, pfnClose, (void *pvUser, PVDIOSTORAGE pStorage)); /** * Delete callback. * * @return VBox status code. * @param pvUser The opaque data passed on container creation. * @param pcszFilename Name of the file to delete. */ DECLR3CALLBACKMEMBER(int, pfnDelete, (void *pvUser, const char *pcszFilename)); /** * Move callback. * * @return VBox status code. * @param pvUser The opaque data passed on container creation. * @param pcszSrc The path to the source file. * @param pcszDst The path to the destination file. * This file will be created. * @param fMove A combination of the RTFILEMOVE_* flags. */ DECLR3CALLBACKMEMBER(int, pfnMove, (void *pvUser, const char *pcszSrc, const char *pcszDst, unsigned fMove)); /** * Returns the free space on a disk. * * @return VBox status code. * @param pvUser The opaque data passed on container creation. * @param pcszFilename Name of a file to identify the disk. * @param pcbFreeSpace Where to store the free space of the disk. */ DECLR3CALLBACKMEMBER(int, pfnGetFreeSpace, (void *pvUser, const char *pcszFilename, int64_t *pcbFreeSpace)); /** * Returns the last modification timestamp of a file. * * @return VBox status code. * @param pvUser The opaque data passed on container creation. * @param pcszFilename Name of a file to identify the disk. * @param pModificationTime Where to store the timestamp of the file. */ DECLR3CALLBACKMEMBER(int, pfnGetModificationTime, (void *pvUser, const char *pcszFilename, PRTTIMESPEC pModificationTime)); /** * Returns the size of the opened storage backend. * * @return VBox status code. * @param pvUser The opaque data passed on container creation. * @param pStorage The storage handle to get the size from. * @param pcbSize Where to store the size of the storage backend. */ DECLR3CALLBACKMEMBER(int, pfnGetSize, (void *pvUser, PVDIOSTORAGE pStorage, uint64_t *pcbSize)); /** * Sets the size of the opened storage backend if possible. * * @return VBox status code. * @retval VERR_NOT_SUPPORTED if the backend does not support this operation. * @param pvUser The opaque data passed on container creation. * @param pStorage The storage handle. * @param cbSize The new size of the image. * * @note Depending on the host the underlying storage (backing file, etc.) * might not have all required storage allocated (sparse file) which * can delay writes or fail with a not enough free space error if there * is not enough space on the storage medium when writing to the range for * the first time. * Use VDINTERFACEIOINT::pfnSetAllocationSize to make sure the storage is * really alloacted. */ DECLR3CALLBACKMEMBER(int, pfnSetSize, (void *pvUser, PVDIOSTORAGE pStorage, uint64_t cbSize)); /** * Sets the size of the opened storage backend making sure the given size * is really allocated. * * @return VBox status code. * @param pvUser The opaque data passed on container creation. * @param pStorage The storage handle. * @param cbSize The new size of the image. * @param fFlags Flags for controlling the allocation strategy. * Reserved for future use, MBZ. * @param pIfProgress Progress interface (optional). * @param uPercentStart Progress starting point. * @param uPercentSpan Length of operation in percent. */ DECLR3CALLBACKMEMBER(int, pfnSetAllocationSize, (void *pvUser, PVDIOSTORAGE pStorage, uint64_t cbSize, uint32_t fFlags, PVDINTERFACEPROGRESS pIfProgress, unsigned uPercentStart, unsigned uPercentSpan)); /** * Initiate a read request for user data. * * @return VBox status code. * @param pvUser The opaque user data passed on container creation. * @param pStorage The storage handle. * @param uOffset The offset to start reading from. * @param pIoCtx I/O context passed in the read/write callback. * @param cbRead How many bytes to read. */ DECLR3CALLBACKMEMBER(int, pfnReadUser, (void *pvUser, PVDIOSTORAGE pStorage, uint64_t uOffset, PVDIOCTX pIoCtx, size_t cbRead)); /** * Initiate a write request for user data. * * @return VBox status code. * @param pvUser The opaque user data passed on container creation. * @param pStorage The storage handle. * @param uOffset The offset to start writing to. * @param pIoCtx I/O context passed in the read/write callback. * @param cbWrite How many bytes to write. * @param pfnCompleted Completion callback. * @param pvCompleteUser Opaque user data passed in the completion callback. */ DECLR3CALLBACKMEMBER(int, pfnWriteUser, (void *pvUser, PVDIOSTORAGE pStorage, uint64_t uOffset, PVDIOCTX pIoCtx, size_t cbWrite, PFNVDXFERCOMPLETED pfnComplete, void *pvCompleteUser)); /** * Reads metadata from storage. * The current I/O context will be halted. * * @returns VBox status code. * @param pvUser The opaque user data passed on container creation. * @param pStorage The storage handle. * @param uOffset Offset to start reading from. * @param pvBuffer Where to store the data. * @param cbBuffer How many bytes to read. * @param pIoCtx The I/O context which triggered the read. * @param ppMetaXfer Where to store the metadata transfer handle on success. * @param pfnCompleted Completion callback. * @param pvCompleteUser Opaque user data passed in the completion callback. * * @note If pIoCtx is NULL the metadata read is handled synchronously * i.e. the call returns only if the data is available in the given * buffer. ppMetaXfer, pfnCompleted and pvCompleteUser are ignored in that case. * Use the synchronous version only when opening/closing the image * or when doing certain operations like resizing, compacting or repairing * the disk. */ DECLR3CALLBACKMEMBER(int, pfnReadMeta, (void *pvUser, PVDIOSTORAGE pStorage, uint64_t uOffset, void *pvBuffer, size_t cbBuffer, PVDIOCTX pIoCtx, PPVDMETAXFER ppMetaXfer, PFNVDXFERCOMPLETED pfnComplete, void *pvCompleteUser)); /** * Writes metadata to storage. * * @returns VBox status code. * @param pvUser The opaque user data passed on container creation. * @param pStorage The storage handle. * @param uOffset Offset to start writing to. * @param pvBuffer Written data. * @param cbBuffer How many bytes to write. * @param pIoCtx The I/O context which triggered the write. * @param pfnCompleted Completion callback. * @param pvCompleteUser Opaque user data passed in the completion callback. * * @sa VDINTERFACEIOINT::pfnReadMeta */ DECLR3CALLBACKMEMBER(int, pfnWriteMeta, (void *pvUser, PVDIOSTORAGE pStorage, uint64_t uOffset, const void *pvBuffer, size_t cbBuffer, PVDIOCTX pIoCtx, PFNVDXFERCOMPLETED pfnComplete, void *pvCompleteUser)); /** * Releases a metadata transfer handle. * The free space can be used for another transfer. * * @returns nothing. * @param pvUser The opaque user data passed on container creation. * @param pMetaXfer The metadata transfer handle to release. */ DECLR3CALLBACKMEMBER(void, pfnMetaXferRelease, (void *pvUser, PVDMETAXFER pMetaXfer)); /** * Initiates a flush request. * * @return VBox status code. * @param pvUser The opaque data passed on container creation. * @param pStorage The storage handle to flush. * @param pIoCtx I/O context which triggered the flush. * @param pfnCompleted Completion callback. * @param pvCompleteUser Opaque user data passed in the completion callback. * * @sa VDINTERFACEIOINT::pfnReadMeta */ DECLR3CALLBACKMEMBER(int, pfnFlush, (void *pvUser, PVDIOSTORAGE pStorage, PVDIOCTX pIoCtx, PFNVDXFERCOMPLETED pfnComplete, void *pvCompleteUser)); /** * Copies a buffer into the I/O context. * * @return Number of bytes copied. * @param pvUser The opaque user data passed on container creation. * @param pIoCtx I/O context to copy the data to. * @param pvBuffer Buffer to copy. * @param cbBuffer Number of bytes to copy. */ DECLR3CALLBACKMEMBER(size_t, pfnIoCtxCopyTo, (void *pvUser, PVDIOCTX pIoCtx, const void *pvBuffer, size_t cbBuffer)); /** * Copies data from the I/O context into a buffer. * * @return Number of bytes copied. * @param pvUser The opaque user data passed on container creation. * @param pIoCtx I/O context to copy the data from. * @param pvBuffer Destination buffer. * @param cbBuffer Number of bytes to copy. */ DECLR3CALLBACKMEMBER(size_t, pfnIoCtxCopyFrom, (void *pvUser, PVDIOCTX pIoCtx, void *pvBuffer, size_t cbBuffer)); /** * Sets the buffer of the given context to a specific byte. * * @return Number of bytes set. * @param pvUser The opaque user data passed on container creation. * @param pIoCtx I/O context to copy the data from. * @param ch The byte to set. * @param cbSet Number of bytes to set. */ DECLR3CALLBACKMEMBER(size_t, pfnIoCtxSet, (void *pvUser, PVDIOCTX pIoCtx, int ch, size_t cbSet)); /** * Creates a segment array from the I/O context data buffer. * * @returns Number of bytes the array describes. * @param pvUser The opaque user data passed on container creation. * @param pIoCtx I/O context to copy the data from. * @param paSeg The uninitialized segment array. * If NULL pcSeg will contain the number of segments needed * to describe the requested amount of data. * @param pcSeg The number of segments the given array has. * This will hold the actual number of entries needed upon return. * @param cbData Number of bytes the new array should describe. */ DECLR3CALLBACKMEMBER(size_t, pfnIoCtxSegArrayCreate, (void *pvUser, PVDIOCTX pIoCtx, PRTSGSEG paSeg, unsigned *pcSeg, size_t cbData)); /** * Marks the given number of bytes as completed and continues the I/O context. * * @returns nothing. * @param pvUser The opaque user data passed on container creation. * @param pIoCtx The I/O context. * @param rcReq Status code the request completed with. * @param cbCompleted Number of bytes completed. */ DECLR3CALLBACKMEMBER(void, pfnIoCtxCompleted, (void *pvUser, PVDIOCTX pIoCtx, int rcReq, size_t cbCompleted)); /** * Returns whether the given I/O context must be treated synchronously. * * @returns true if the I/O context must be processed synchronously * false otherwise. * @param pvUser The opaque user data passed on container creation. * @param pIoCtx The I/O context. */ DECLR3CALLBACKMEMBER(bool, pfnIoCtxIsSynchronous, (void *pvUser, PVDIOCTX pIoCtx)); /** * Returns whether the user buffer of the I/O context is complete zero * from to current position upto the given number of bytes. * * @returns true if the I/O context user buffer consists solely of zeros * false otherwise. * @param pvUser The opaque user data passed on container creation. * @param pIoCtx The I/O context. * @param cbCheck Number of bytes to check for zeros. * @param fAdvance Flag whether to advance the buffer pointer if true * is returned. */ DECLR3CALLBACKMEMBER(bool, pfnIoCtxIsZero, (void *pvUser, PVDIOCTX pIoCtx, size_t cbCheck, bool fAdvance)); /** * Returns the data unit size, i.e. the smallest size for a transfer. * (similar to the sector size of disks). * * @returns The data unit size. * @param pvUser The opaque user data passed on container creation. * @param pIoCtx The I/O context. */ DECLR3CALLBACKMEMBER(size_t, pfnIoCtxGetDataUnitSize, (void *pvUser, PVDIOCTX pIoCtx)); } VDINTERFACEIOINT, *PVDINTERFACEIOINT; /** * Get internal I/O interface from interface list. * * @return Pointer to the first internal I/O interface in the list. * @param pVDIfs Pointer to the interface list. */ DECLINLINE(PVDINTERFACEIOINT) VDIfIoIntGet(PVDINTERFACE pVDIfs) { PVDINTERFACE pIf = VDInterfaceGet(pVDIfs, VDINTERFACETYPE_IOINT); /* Check that the interface descriptor is a progress interface. */ AssertMsgReturn( !pIf || ( (pIf->enmInterface == VDINTERFACETYPE_IOINT) && (pIf->cbSize == sizeof(VDINTERFACEIOINT))), ("Not an internal I/O interface"), NULL); return (PVDINTERFACEIOINT)pIf; } DECLINLINE(int) vdIfIoIntFileOpen(PVDINTERFACEIOINT pIfIoInt, const char *pszFilename, uint32_t fOpen, PPVDIOSTORAGE ppStorage) { return pIfIoInt->pfnOpen(pIfIoInt->Core.pvUser, pszFilename, fOpen, ppStorage); } DECLINLINE(int) vdIfIoIntFileClose(PVDINTERFACEIOINT pIfIoInt, PVDIOSTORAGE pStorage) { return pIfIoInt->pfnClose(pIfIoInt->Core.pvUser, pStorage); } DECLINLINE(int) vdIfIoIntFileDelete(PVDINTERFACEIOINT pIfIoInt, const char *pszFilename) { return pIfIoInt->pfnDelete(pIfIoInt->Core.pvUser, pszFilename); } DECLINLINE(int) vdIfIoIntFileMove(PVDINTERFACEIOINT pIfIoInt, const char *pszSrc, const char *pszDst, unsigned fMove) { return pIfIoInt->pfnMove(pIfIoInt->Core.pvUser, pszSrc, pszDst, fMove); } DECLINLINE(int) vdIfIoIntFileGetFreeSpace(PVDINTERFACEIOINT pIfIoInt, const char *pszFilename, int64_t *pcbFree) { return pIfIoInt->pfnGetFreeSpace(pIfIoInt->Core.pvUser, pszFilename, pcbFree); } DECLINLINE(int) vdIfIoIntFileGetModificationTime(PVDINTERFACEIOINT pIfIoInt, const char *pcszFilename, PRTTIMESPEC pModificationTime) { return pIfIoInt->pfnGetModificationTime(pIfIoInt->Core.pvUser, pcszFilename, pModificationTime); } DECLINLINE(int) vdIfIoIntFileGetSize(PVDINTERFACEIOINT pIfIoInt, PVDIOSTORAGE pStorage, uint64_t *pcbSize) { return pIfIoInt->pfnGetSize(pIfIoInt->Core.pvUser, pStorage, pcbSize); } DECLINLINE(int) vdIfIoIntFileSetSize(PVDINTERFACEIOINT pIfIoInt, PVDIOSTORAGE pStorage, uint64_t cbSize) { return pIfIoInt->pfnSetSize(pIfIoInt->Core.pvUser, pStorage, cbSize); } DECLINLINE(int) vdIfIoIntFileSetAllocationSize(PVDINTERFACEIOINT pIfIoInt, PVDIOSTORAGE pStorage, uint64_t cbSize, uint32_t fFlags, PVDINTERFACEPROGRESS pIfProgress, unsigned uPercentStart, unsigned uPercentSpan) { return pIfIoInt->pfnSetAllocationSize(pIfIoInt->Core.pvUser, pStorage, cbSize, fFlags, pIfProgress, uPercentStart, uPercentSpan); } DECLINLINE(int) vdIfIoIntFileWriteSync(PVDINTERFACEIOINT pIfIoInt, PVDIOSTORAGE pStorage, uint64_t uOffset, const void *pvBuffer, size_t cbBuffer) { return pIfIoInt->pfnWriteMeta(pIfIoInt->Core.pvUser, pStorage, uOffset, pvBuffer, cbBuffer, NULL, NULL, NULL); } DECLINLINE(int) vdIfIoIntFileReadSync(PVDINTERFACEIOINT pIfIoInt, PVDIOSTORAGE pStorage, uint64_t uOffset, void *pvBuffer, size_t cbBuffer) { return pIfIoInt->pfnReadMeta(pIfIoInt->Core.pvUser, pStorage, uOffset, pvBuffer, cbBuffer, NULL, NULL, NULL, NULL); } DECLINLINE(int) vdIfIoIntFileFlushSync(PVDINTERFACEIOINT pIfIoInt, PVDIOSTORAGE pStorage) { return pIfIoInt->pfnFlush(pIfIoInt->Core.pvUser, pStorage, NULL, NULL, NULL); } DECLINLINE(int) vdIfIoIntFileReadUser(PVDINTERFACEIOINT pIfIoInt, PVDIOSTORAGE pStorage, uint64_t uOffset, PVDIOCTX pIoCtx, size_t cbRead) { return pIfIoInt->pfnReadUser(pIfIoInt->Core.pvUser, pStorage, uOffset, pIoCtx, cbRead); } DECLINLINE(int) vdIfIoIntFileWriteUser(PVDINTERFACEIOINT pIfIoInt, PVDIOSTORAGE pStorage, uint64_t uOffset, PVDIOCTX pIoCtx, size_t cbWrite, PFNVDXFERCOMPLETED pfnComplete, void *pvCompleteUser) { return pIfIoInt->pfnWriteUser(pIfIoInt->Core.pvUser, pStorage, uOffset, pIoCtx, cbWrite, pfnComplete, pvCompleteUser); } DECLINLINE(int) vdIfIoIntFileReadMeta(PVDINTERFACEIOINT pIfIoInt, PVDIOSTORAGE pStorage, uint64_t uOffset, void *pvBuffer, size_t cbBuffer, PVDIOCTX pIoCtx, PPVDMETAXFER ppMetaXfer, PFNVDXFERCOMPLETED pfnComplete, void *pvCompleteUser) { return pIfIoInt->pfnReadMeta(pIfIoInt->Core.pvUser, pStorage, uOffset, pvBuffer, cbBuffer, pIoCtx, ppMetaXfer, pfnComplete, pvCompleteUser); } DECLINLINE(int) vdIfIoIntFileWriteMeta(PVDINTERFACEIOINT pIfIoInt, PVDIOSTORAGE pStorage, uint64_t uOffset, void *pvBuffer, size_t cbBuffer, PVDIOCTX pIoCtx, PFNVDXFERCOMPLETED pfnComplete, void *pvCompleteUser) { return pIfIoInt->pfnWriteMeta(pIfIoInt->Core.pvUser, pStorage, uOffset, pvBuffer, cbBuffer, pIoCtx, pfnComplete, pvCompleteUser); } DECLINLINE(void) vdIfIoIntMetaXferRelease(PVDINTERFACEIOINT pIfIoInt, PVDMETAXFER pMetaXfer) { pIfIoInt->pfnMetaXferRelease(pIfIoInt->Core.pvUser, pMetaXfer); } DECLINLINE(int) vdIfIoIntFileFlush(PVDINTERFACEIOINT pIfIoInt, PVDIOSTORAGE pStorage, PVDIOCTX pIoCtx, PFNVDXFERCOMPLETED pfnComplete, void *pvCompleteUser) { return pIfIoInt->pfnFlush(pIfIoInt->Core.pvUser, pStorage, pIoCtx, pfnComplete, pvCompleteUser); } DECLINLINE(size_t) vdIfIoIntIoCtxCopyTo(PVDINTERFACEIOINT pIfIoInt, PVDIOCTX pIoCtx, const void *pvBuffer, size_t cbBuffer) { return pIfIoInt->pfnIoCtxCopyTo(pIfIoInt->Core.pvUser, pIoCtx, pvBuffer, cbBuffer); } DECLINLINE(size_t) vdIfIoIntIoCtxCopyFrom(PVDINTERFACEIOINT pIfIoInt, PVDIOCTX pIoCtx, void *pvBuffer, size_t cbBuffer) { return pIfIoInt->pfnIoCtxCopyFrom(pIfIoInt->Core.pvUser, pIoCtx, pvBuffer, cbBuffer); } DECLINLINE(size_t) vdIfIoIntIoCtxSet(PVDINTERFACEIOINT pIfIoInt, PVDIOCTX pIoCtx, int ch, size_t cbSet) { return pIfIoInt->pfnIoCtxSet(pIfIoInt->Core.pvUser, pIoCtx, ch, cbSet); } DECLINLINE(size_t) vdIfIoIntIoCtxSegArrayCreate(PVDINTERFACEIOINT pIfIoInt, PVDIOCTX pIoCtx, PRTSGSEG paSeg, unsigned *pcSeg, size_t cbData) { return pIfIoInt->pfnIoCtxSegArrayCreate(pIfIoInt->Core.pvUser, pIoCtx, paSeg, pcSeg, cbData); } DECLINLINE(bool) vdIfIoIntIoCtxIsSynchronous(PVDINTERFACEIOINT pIfIoInt, PVDIOCTX pIoCtx) { return pIfIoInt->pfnIoCtxIsSynchronous(pIfIoInt->Core.pvUser, pIoCtx); } DECLINLINE(bool) vdIfIoIntIoCtxIsZero(PVDINTERFACEIOINT pIfIoInt, PVDIOCTX pIoCtx, size_t cbCheck, bool fAdvance) { return pIfIoInt->pfnIoCtxIsZero(pIfIoInt->Core.pvUser, pIoCtx, cbCheck, fAdvance); } DECLINLINE(size_t) vdIfIoIntIoCtxGetDataUnitSize(PVDINTERFACEIOINT pIfIoInt, PVDIOCTX pIoCtx) { return pIfIoInt->pfnIoCtxGetDataUnitSize(pIfIoInt->Core.pvUser, pIoCtx); } /** * Interface for the metadata traverse callback. * * Per-operation interface. Present only for the metadata traverse callback. */ typedef struct VDINTERFACETRAVERSEMETADATA { /** * Common interface header. */ VDINTERFACE Core; /** * Traverse callback. * * @returns VBox status code. * @param pvUser The opaque data passed for the operation. * @param pvMetadataChunk Pointer to a chunk of the image metadata. * @param cbMetadataChunk Size of the metadata chunk */ DECLR3CALLBACKMEMBER(int, pfnMetadataCallback, (void *pvUser, const void *pvMetadataChunk, size_t cbMetadataChunk)); } VDINTERFACETRAVERSEMETADATA, *PVDINTERFACETRAVERSEMETADATA; /** * Get parent state interface from interface list. * * @return Pointer to the first parent state interface in the list. * @param pVDIfs Pointer to the interface list. */ DECLINLINE(PVDINTERFACETRAVERSEMETADATA) VDIfTraverseMetadataGet(PVDINTERFACE pVDIfs) { PVDINTERFACE pIf = VDInterfaceGet(pVDIfs, VDINTERFACETYPE_TRAVERSEMETADATA); /* Check that the interface descriptor the correct interface. */ AssertMsgReturn( !pIf || ( (pIf->enmInterface == VDINTERFACETYPE_TRAVERSEMETADATA) && (pIf->cbSize == sizeof(VDINTERFACETRAVERSEMETADATA))), ("Not a traverse metadata interface"), NULL); return (PVDINTERFACETRAVERSEMETADATA)pIf; } RT_C_DECLS_END /** @} */ #endif /* !VBOX_INCLUDED_vd_ifs_internal_h */