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| -rw-r--r-- | include/VBox/vd-ifs-internal.h | 710 |
1 files changed, 710 insertions, 0 deletions
diff --git a/include/VBox/vd-ifs-internal.h b/include/VBox/vd-ifs-internal.h new file mode 100644 index 00000000..7bff7642 --- /dev/null +++ b/include/VBox/vd-ifs-internal.h @@ -0,0 +1,710 @@ +/** @file + * VD Container API - internal interfaces. + */ + +/* + * Copyright (C) 2011-2022 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. + * + * @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 */ |