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+/** @file
+ * VD Container API - internal interfaces.
+ */
+
+/*
+ * Copyright (C) 2011-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef VBOX_INCLUDED_vd_ifs_internal_h
+#define VBOX_INCLUDED_vd_ifs_internal_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/sg.h>
+#include <VBox/vd-ifs.h>
+
+RT_C_DECLS_BEGIN
+
+/** @addtogroup grp_vd
+ * @internal
+ * @{ */
+
+/**
+ * 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.
+ */
+typedef DECLCALLBACKTYPE(int, FNVDPARENTREAD,(void *pvUser, uint64_t uOffset, void *pvBuffer, size_t cbBuffer));
+/** Pointer to a FNVDPARENTREAD. */
+typedef FNVDPARENTREAD *PFNVDPARENTREAD;
+
+/**
+ * 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, see FNVDPARENTREAD for details.
+ */
+ PFNVDPARENTREAD pfnParentRead;
+
+} 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 DECLCALLBACKTYPE(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.
+ *
+ * @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.
+ *
+ * @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 */