/* $Id: Parallels.cpp 50988 2014-04-07 19:36:54Z vboxsync $ */ /** @file * * Parallels hdd disk image, core code. */ /* * Copyright (C) 2006-2013 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. */ #define LOG_GROUP LOG_GROUP_VD_PARALLELS #include #include #include #include #include #include #include #include #include #include "VDBackends.h" #define PARALLELS_HEADER_MAGIC "WithoutFreeSpace" #define PARALLELS_DISK_VERSION 2 /** The header of the parallels disk. */ #pragma pack(1) typedef struct ParallelsHeader { /** The magic header to identify a parallels hdd image. */ char HeaderIdentifier[16]; /** The version of the disk image. */ uint32_t uVersion; /** The number of heads the hdd has. */ uint32_t cHeads; /** Number of cylinders. */ uint32_t cCylinders; /** Number of sectors per track. */ uint32_t cSectorsPerTrack; /** Number of entries in the allocation bitmap. */ uint32_t cEntriesInAllocationBitmap; /** Total number of sectors. */ uint32_t cSectors; /** Padding. */ char Padding[24]; } ParallelsHeader; #pragma pack() /** * Parallels image structure. */ typedef struct PARALLELSIMAGE { /** Image file name. */ const char *pszFilename; /** Opaque storage handle. */ PVDIOSTORAGE pStorage; /** Pointer to the per-disk VD interface list. */ PVDINTERFACE pVDIfsDisk; /** Pointer to the per-image VD interface list. */ PVDINTERFACE pVDIfsImage; /** Error interface. */ PVDINTERFACEERROR pIfError; /** I/O interface. */ PVDINTERFACEIOINT pIfIo; /** Open flags passed by VBoxHDD layer. */ unsigned uOpenFlags; /** Image flags defined during creation or determined during open. */ unsigned uImageFlags; /** Total size of the image. */ uint64_t cbSize; /** Physical geometry of this image. */ VDGEOMETRY PCHSGeometry; /** Logical geometry of this image. */ VDGEOMETRY LCHSGeometry; /** Pointer to the allocation bitmap. */ uint32_t *pAllocationBitmap; /** Entries in the allocation bitmap. */ uint64_t cAllocationBitmapEntries; /** Flag whether the allocation bitmap was changed. */ bool fAllocationBitmapChanged; /** Current file size. */ uint64_t cbFileCurrent; } PARALLELSIMAGE, *PPARALLELSIMAGE; /******************************************************************************* * Static Variables * *******************************************************************************/ /** NULL-terminated array of supported file extensions. */ static const VDFILEEXTENSION s_aParallelsFileExtensions[] = { {"hdd", VDTYPE_HDD}, {NULL, VDTYPE_INVALID} }; /*************************************************** * Internal functions * **************************************************/ /** * Internal. Flush image data to disk. */ static int parallelsFlushImage(PPARALLELSIMAGE pImage) { int rc = VINF_SUCCESS; if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY) return VINF_SUCCESS; if ( !(pImage->uImageFlags & VD_IMAGE_FLAGS_FIXED) && (pImage->fAllocationBitmapChanged)) { pImage->fAllocationBitmapChanged = false; /* Write the allocation bitmap to the file. */ rc = vdIfIoIntFileWriteSync(pImage->pIfIo, pImage->pStorage, sizeof(ParallelsHeader), pImage->pAllocationBitmap, pImage->cAllocationBitmapEntries * sizeof(uint32_t)); if (RT_FAILURE(rc)) return rc; } /* Flush file. */ rc = vdIfIoIntFileFlushSync(pImage->pIfIo, pImage->pStorage); LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** * Internal. Free all allocated space for representing an image except pImage, * and optionally delete the image from disk. */ static int parallelsFreeImage(PPARALLELSIMAGE pImage, bool fDelete) { int rc = VINF_SUCCESS; /* Freeing a never allocated image (e.g. because the open failed) is * not signalled as an error. After all nothing bad happens. */ if (pImage) { if (pImage->pStorage) { /* No point updating the file that is deleted anyway. */ if (!fDelete) parallelsFlushImage(pImage); rc = vdIfIoIntFileClose(pImage->pIfIo, pImage->pStorage); pImage->pStorage = NULL; } if (pImage->pAllocationBitmap) { RTMemFree(pImage->pAllocationBitmap); pImage->pAllocationBitmap = NULL; } if (fDelete && pImage->pszFilename) vdIfIoIntFileDelete(pImage->pIfIo, pImage->pszFilename); } return rc; } static int parallelsOpenImage(PPARALLELSIMAGE pImage, unsigned uOpenFlags) { int rc = VINF_SUCCESS; ParallelsHeader parallelsHeader; pImage->pIfError = VDIfErrorGet(pImage->pVDIfsDisk); pImage->pIfIo = VDIfIoIntGet(pImage->pVDIfsImage); pImage->uOpenFlags = uOpenFlags; AssertPtrReturn(pImage->pIfIo, VERR_INVALID_PARAMETER); rc = vdIfIoIntFileOpen(pImage->pIfIo, pImage->pszFilename, VDOpenFlagsToFileOpenFlags(uOpenFlags, false /* fCreate */), &pImage->pStorage); if (RT_FAILURE(rc)) goto out; rc = vdIfIoIntFileGetSize(pImage->pIfIo, pImage->pStorage, &pImage->cbFileCurrent); if (RT_FAILURE(rc)) goto out; AssertMsg(pImage->cbFileCurrent % 512 == 0, ("File size is not a multiple of 512\n")); rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, 0, ¶llelsHeader, sizeof(parallelsHeader)); if (RT_FAILURE(rc)) goto out; if (memcmp(parallelsHeader.HeaderIdentifier, PARALLELS_HEADER_MAGIC, 16)) { /* Check if the file has hdd as extension. It is a fixed size raw image then. */ char *pszSuffix = RTPathSuffix(pImage->pszFilename); if (strcmp(pszSuffix, ".hdd")) { rc = VERR_VD_PARALLELS_INVALID_HEADER; goto out; } /* This is a fixed size image. */ pImage->uImageFlags |= VD_IMAGE_FLAGS_FIXED; pImage->cbSize = pImage->cbFileCurrent; pImage->PCHSGeometry.cHeads = 16; pImage->PCHSGeometry.cSectors = 63; uint64_t cCylinders = pImage->cbSize / (512 * pImage->PCHSGeometry.cSectors * pImage->PCHSGeometry.cHeads); pImage->PCHSGeometry.cCylinders = (uint32_t)cCylinders; } else { if (parallelsHeader.uVersion != PARALLELS_DISK_VERSION) { rc = VERR_NOT_SUPPORTED; goto out; } if (parallelsHeader.cEntriesInAllocationBitmap > (1 << 30)) { rc = VERR_NOT_SUPPORTED; goto out; } Log(("cSectors=%u\n", parallelsHeader.cSectors)); pImage->cbSize = ((uint64_t)parallelsHeader.cSectors) * 512; pImage->uImageFlags = VD_IMAGE_FLAGS_NONE; pImage->cAllocationBitmapEntries = parallelsHeader.cEntriesInAllocationBitmap; pImage->pAllocationBitmap = (uint32_t *)RTMemAllocZ((uint32_t)pImage->cAllocationBitmapEntries * sizeof(uint32_t)); if (!pImage->pAllocationBitmap) { rc = VERR_NO_MEMORY; goto out; } rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, sizeof(ParallelsHeader), pImage->pAllocationBitmap, pImage->cAllocationBitmapEntries * sizeof(uint32_t)); if (RT_FAILURE(rc)) goto out; pImage->PCHSGeometry.cCylinders = parallelsHeader.cCylinders; pImage->PCHSGeometry.cHeads = parallelsHeader.cHeads; pImage->PCHSGeometry.cSectors = parallelsHeader.cSectorsPerTrack; } out: LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** * Internal: Create a parallels image. */ static int parallelsCreateImage(PPARALLELSIMAGE pImage, uint64_t cbSize, unsigned uImageFlags, const char *pszComment, PCVDGEOMETRY pPCHSGeometry, PCVDGEOMETRY pLCHSGeometry, unsigned uOpenFlags, PFNVDPROGRESS pfnProgress, void *pvUser, unsigned uPercentStart, unsigned uPercentSpan) { int rc = VINF_SUCCESS; int32_t fOpen; if (uImageFlags & VD_IMAGE_FLAGS_FIXED) { rc = vdIfError(pImage->pIfError, VERR_VD_INVALID_TYPE, RT_SRC_POS, N_("Parallels: cannot create fixed image '%s'. Create a raw image"), pImage->pszFilename); goto out; } pImage->uOpenFlags = uOpenFlags & ~VD_OPEN_FLAGS_READONLY; pImage->uImageFlags = uImageFlags; pImage->PCHSGeometry = *pPCHSGeometry; pImage->LCHSGeometry = *pLCHSGeometry; if (!pImage->PCHSGeometry.cCylinders) { /* Set defaults. */ pImage->PCHSGeometry.cSectors = 63; pImage->PCHSGeometry.cHeads = 16; pImage->PCHSGeometry.cCylinders = pImage->cbSize / (512 * pImage->PCHSGeometry.cSectors * pImage->PCHSGeometry.cHeads); } pImage->pIfError = VDIfErrorGet(pImage->pVDIfsDisk); pImage->pIfIo = VDIfIoIntGet(pImage->pVDIfsImage); AssertPtrReturn(pImage->pIfIo, VERR_INVALID_PARAMETER); /* Create image file. */ fOpen = VDOpenFlagsToFileOpenFlags(pImage->uOpenFlags, true /* fCreate */); rc = vdIfIoIntFileOpen(pImage->pIfIo, pImage->pszFilename, fOpen, &pImage->pStorage); if (RT_FAILURE(rc)) { rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS, N_("Parallels: cannot create image '%s'"), pImage->pszFilename); goto out; } if (RT_SUCCESS(rc) && pfnProgress) pfnProgress(pvUser, uPercentStart + uPercentSpan * 98 / 100); /* Setup image state. */ pImage->cbSize = cbSize; pImage->cAllocationBitmapEntries = cbSize / 512 / pImage->PCHSGeometry.cSectors; if (pImage->cAllocationBitmapEntries * pImage->PCHSGeometry.cSectors * 512 < cbSize) pImage->cAllocationBitmapEntries++; pImage->fAllocationBitmapChanged = true; pImage->cbFileCurrent = sizeof(ParallelsHeader) + pImage->cAllocationBitmapEntries * sizeof(uint32_t); /* Round to next sector boundary. */ pImage->cbFileCurrent += 512 - pImage->cbFileCurrent % 512; Assert(!(pImage->cbFileCurrent % 512)); pImage->pAllocationBitmap = (uint32_t *)RTMemAllocZ(pImage->cAllocationBitmapEntries * sizeof(uint32_t)); if (!pImage->pAllocationBitmap) rc = VERR_NO_MEMORY; if (RT_SUCCESS(rc)) { ParallelsHeader Header; memcpy(Header.HeaderIdentifier, PARALLELS_HEADER_MAGIC, sizeof(Header.HeaderIdentifier)); Header.uVersion = RT_H2LE_U32(PARALLELS_DISK_VERSION); Header.cHeads = RT_H2LE_U32(pImage->PCHSGeometry.cHeads); Header.cCylinders = RT_H2LE_U32(pImage->PCHSGeometry.cCylinders); Header.cSectorsPerTrack = RT_H2LE_U32(pImage->PCHSGeometry.cSectors); Header.cEntriesInAllocationBitmap = RT_H2LE_U32(pImage->cAllocationBitmapEntries); Header.cSectors = RT_H2LE_U32(pImage->cbSize / 512); memset(Header.Padding, 0, sizeof(Header.Padding)); /* Write header and allocation bitmap. */ rc = vdIfIoIntFileSetSize(pImage->pIfIo, pImage->pStorage, pImage->cbFileCurrent); if (RT_SUCCESS(rc)) rc = vdIfIoIntFileWriteSync(pImage->pIfIo, pImage->pStorage, 0, &Header, sizeof(Header)); if (RT_SUCCESS(rc)) rc = parallelsFlushImage(pImage); /* Writes the allocation bitmap. */ } out: if (RT_SUCCESS(rc) && pfnProgress) pfnProgress(pvUser, uPercentStart + uPercentSpan); if (RT_FAILURE(rc)) parallelsFreeImage(pImage, rc != VERR_ALREADY_EXISTS); return rc; } /** @copydoc VBOXHDDBACKEND::pfnCheckIfValid */ static int parallelsCheckIfValid(const char *pszFilename, PVDINTERFACE pVDIfsDisk, PVDINTERFACE pVDIfsImage, VDTYPE *penmType) { int rc; PVDIOSTORAGE pStorage; ParallelsHeader parallelsHeader; PVDINTERFACEIOINT pIfIo = VDIfIoIntGet(pVDIfsImage); AssertPtrReturn(pIfIo, VERR_INVALID_PARAMETER); rc = vdIfIoIntFileOpen(pIfIo, pszFilename, VDOpenFlagsToFileOpenFlags(VD_OPEN_FLAGS_READONLY, false /* fCreate */), &pStorage); if (RT_FAILURE(rc)) return rc; rc = vdIfIoIntFileReadSync(pIfIo, pStorage, 0, ¶llelsHeader, sizeof(ParallelsHeader)); if (RT_SUCCESS(rc)) { if ( !memcmp(parallelsHeader.HeaderIdentifier, PARALLELS_HEADER_MAGIC, 16) && (parallelsHeader.uVersion == PARALLELS_DISK_VERSION)) rc = VINF_SUCCESS; else { /* * The image may be an fixed size image. * Unfortunately fixed sized parallels images * are just raw files hence no magic header to * check for. * The code succeeds if the file is a multiple * of 512 and if the file extensions is *.hdd */ uint64_t cbFile; char *pszSuffix; rc = vdIfIoIntFileGetSize(pIfIo, pStorage, &cbFile); if (RT_FAILURE(rc) || ((cbFile % 512) != 0)) { vdIfIoIntFileClose(pIfIo, pStorage); return VERR_VD_PARALLELS_INVALID_HEADER; } pszSuffix = RTPathSuffix(pszFilename); if (!pszSuffix || strcmp(pszSuffix, ".hdd")) rc = VERR_VD_PARALLELS_INVALID_HEADER; else rc = VINF_SUCCESS; } } if (RT_SUCCESS(rc)) *penmType = VDTYPE_HDD; vdIfIoIntFileClose(pIfIo, pStorage); return rc; } /** @copydoc VBOXHDDBACKEND::pfnOpen */ static int parallelsOpen(const char *pszFilename, unsigned uOpenFlags, PVDINTERFACE pVDIfsDisk, PVDINTERFACE pVDIfsImage, VDTYPE enmType, void **ppBackendData) { LogFlowFunc(("pszFilename=\"%s\" uOpenFlags=%#x pVDIfsDisk=%#p pVDIfsImage=%#p ppBackendData=%#p\n", pszFilename, uOpenFlags, pVDIfsDisk, pVDIfsImage, ppBackendData)); int rc; PPARALLELSIMAGE pImage; /* Check open flags. All valid flags are supported. */ if (uOpenFlags & ~VD_OPEN_FLAGS_MASK) { rc = VERR_INVALID_PARAMETER; goto out; } /* Check remaining arguments. */ if ( !VALID_PTR(pszFilename) || !*pszFilename) { rc = VERR_INVALID_PARAMETER; goto out; } pImage = (PPARALLELSIMAGE)RTMemAllocZ(sizeof(PARALLELSIMAGE)); if (!pImage) { rc = VERR_NO_MEMORY; goto out; } pImage->pszFilename = pszFilename; pImage->pStorage = NULL; pImage->pVDIfsDisk = pVDIfsDisk; pImage->pVDIfsImage = pVDIfsImage; pImage->fAllocationBitmapChanged = false; rc = parallelsOpenImage(pImage, uOpenFlags); if (RT_SUCCESS(rc)) *ppBackendData = pImage; else RTMemFree(pImage); out: LogFlowFunc(("returns %Rrc (pBackendData=%#p)\n", rc, *ppBackendData)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnCreate */ static int parallelsCreate(const char *pszFilename, uint64_t cbSize, unsigned uImageFlags, const char *pszComment, PCVDGEOMETRY pPCHSGeometry, PCVDGEOMETRY pLCHSGeometry, PCRTUUID pUuid, unsigned uOpenFlags, unsigned uPercentStart, unsigned uPercentSpan, PVDINTERFACE pVDIfsDisk, PVDINTERFACE pVDIfsImage, PVDINTERFACE pVDIfsOperation, void **ppBackendData) { LogFlowFunc(("pszFilename=\"%s\" cbSize=%llu uImageFlags=%#x pszComment=\"%s\" pPCHSGeometry=%#p pLCHSGeometry=%#p Uuid=%RTuuid uOpenFlags=%#x uPercentStart=%u uPercentSpan=%u pVDIfsDisk=%#p pVDIfsImage=%#p pVDIfsOperation=%#p ppBackendData=%#p", pszFilename, cbSize, uImageFlags, pszComment, pPCHSGeometry, pLCHSGeometry, pUuid, uOpenFlags, uPercentStart, uPercentSpan, pVDIfsDisk, pVDIfsImage, pVDIfsOperation, ppBackendData)); int rc = VINF_SUCCESS; PPARALLELSIMAGE pImage; PFNVDPROGRESS pfnProgress = NULL; void *pvUser = NULL; PVDINTERFACEPROGRESS pIfProgress = VDIfProgressGet(pVDIfsOperation); if (pIfProgress) { pfnProgress = pIfProgress->pfnProgress; pvUser = pIfProgress->Core.pvUser; } /* Check open flags. All valid flags are supported. */ if (uOpenFlags & ~VD_OPEN_FLAGS_MASK) { rc = VERR_INVALID_PARAMETER; goto out; } /* Check remaining arguments. */ if ( !VALID_PTR(pszFilename) || !*pszFilename || !VALID_PTR(pPCHSGeometry) || !VALID_PTR(pLCHSGeometry)) { rc = VERR_INVALID_PARAMETER; goto out; } pImage = (PPARALLELSIMAGE)RTMemAllocZ(sizeof(PARALLELSIMAGE)); if (!pImage) { rc = VERR_NO_MEMORY; goto out; } pImage->pszFilename = pszFilename; pImage->pStorage = NULL; pImage->pVDIfsDisk = pVDIfsDisk; pImage->pVDIfsImage = pVDIfsImage; rc = parallelsCreateImage(pImage, cbSize, uImageFlags, pszComment, pPCHSGeometry, pLCHSGeometry, uOpenFlags, pfnProgress, pvUser, uPercentStart, uPercentSpan); if (RT_SUCCESS(rc)) { /* So far the image is opened in read/write mode. Make sure the * image is opened in read-only mode if the caller requested that. */ if (uOpenFlags & VD_OPEN_FLAGS_READONLY) { parallelsFreeImage(pImage, false); rc = parallelsOpenImage(pImage, uOpenFlags); if (RT_FAILURE(rc)) { RTMemFree(pImage); goto out; } } *ppBackendData = pImage; } else RTMemFree(pImage); out: LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnRename */ static int parallelsRename(void *pBackendData, const char *pszFilename) { LogFlowFunc(("pBackendData=%#p pszFilename=%#p\n", pBackendData, pszFilename)); int rc = VINF_SUCCESS; PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; /* Check arguments. */ if ( !pImage || !pszFilename || !*pszFilename) { rc = VERR_INVALID_PARAMETER; goto out; } /* Close the image. */ rc = parallelsFreeImage(pImage, false); if (RT_FAILURE(rc)) goto out; /* Rename the file. */ rc = vdIfIoIntFileMove(pImage->pIfIo, pImage->pszFilename, pszFilename, 0); if (RT_FAILURE(rc)) { /* The move failed, try to reopen the original image. */ int rc2 = parallelsOpenImage(pImage, pImage->uOpenFlags); if (RT_FAILURE(rc2)) rc = rc2; goto out; } /* Update pImage with the new information. */ pImage->pszFilename = pszFilename; /* Open the old image with new name. */ rc = parallelsOpenImage(pImage, pImage->uOpenFlags); if (RT_FAILURE(rc)) goto out; out: LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnClose */ static int parallelsClose(void *pBackendData, bool fDelete) { LogFlowFunc(("pBackendData=%#p fDelete=%d\n", pBackendData, fDelete)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; rc = parallelsFreeImage(pImage, fDelete); RTMemFree(pImage); LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnRead */ static int parallelsRead(void *pBackendData, uint64_t uOffset, size_t cbToRead, PVDIOCTX pIoCtx, size_t *pcbActuallyRead) { LogFlowFunc(("pBackendData=%#p uOffset=%llu pIoCtx=%#p cbToRead=%zu pcbActuallyRead=%#p\n", pBackendData, uOffset, pIoCtx, cbToRead, pcbActuallyRead)); int rc = VINF_SUCCESS; PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; uint64_t uSector; uint64_t uOffsetInFile; uint32_t iIndexInAllocationTable; AssertPtr(pImage); Assert(uOffset % 512 == 0); Assert(cbToRead % 512 == 0); if (pImage->uImageFlags & VD_IMAGE_FLAGS_FIXED) rc = vdIfIoIntFileReadUser(pImage->pIfIo, pImage->pStorage, uOffset, pIoCtx, cbToRead); else { /* Calculate offset in the real file. */ uSector = uOffset / 512; /* One chunk in the file is always one track big. */ iIndexInAllocationTable = (uint32_t)(uSector / pImage->PCHSGeometry.cSectors); uSector = uSector % pImage->PCHSGeometry.cSectors; cbToRead = RT_MIN(cbToRead, (pImage->PCHSGeometry.cSectors - uSector)*512); if (pImage->pAllocationBitmap[iIndexInAllocationTable] == 0) rc = VERR_VD_BLOCK_FREE; else { uOffsetInFile = (pImage->pAllocationBitmap[iIndexInAllocationTable] + uSector) * 512; rc = vdIfIoIntFileReadUser(pImage->pIfIo, pImage->pStorage, uOffsetInFile, pIoCtx, cbToRead); } } *pcbActuallyRead = cbToRead; LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnWrite */ static int parallelsWrite(void *pBackendData, uint64_t uOffset, size_t cbToWrite, PVDIOCTX pIoCtx, size_t *pcbWriteProcess, size_t *pcbPreRead, size_t *pcbPostRead, unsigned fWrite) { LogFlowFunc(("pBackendData=%#p uOffset=%llu pIoCtx=%#p cbToWrite=%zu pcbWriteProcess=%#p\n", pBackendData, uOffset, pIoCtx, cbToWrite, pcbWriteProcess)); int rc = VINF_SUCCESS; PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; uint64_t uSector; uint64_t uOffsetInFile; uint32_t iIndexInAllocationTable; AssertPtr(pImage); Assert(uOffset % 512 == 0); Assert(cbToWrite % 512 == 0); if (pImage->uImageFlags & VD_IMAGE_FLAGS_FIXED) rc = vdIfIoIntFileWriteUser(pImage->pIfIo, pImage->pStorage, uOffset, pIoCtx, cbToWrite, NULL, NULL); else { /* Calculate offset in the real file. */ uSector = uOffset / 512; /* One chunk in the file is always one track big. */ iIndexInAllocationTable = (uint32_t)(uSector / pImage->PCHSGeometry.cSectors); uSector = uSector % pImage->PCHSGeometry.cSectors; cbToWrite = RT_MIN(cbToWrite, (pImage->PCHSGeometry.cSectors - uSector)*512); if (pImage->pAllocationBitmap[iIndexInAllocationTable] == 0) { if (fWrite & VD_WRITE_NO_ALLOC) { *pcbPreRead = uSector * 512; *pcbPostRead = pImage->PCHSGeometry.cSectors * 512 - cbToWrite - *pcbPreRead; if (pcbWriteProcess) *pcbWriteProcess = cbToWrite; return VERR_VD_BLOCK_FREE; } /* Allocate new chunk in the file. */ Assert(uSector == 0); AssertMsg(pImage->cbFileCurrent % 512 == 0, ("File size is not a multiple of 512\n")); pImage->pAllocationBitmap[iIndexInAllocationTable] = (uint32_t)(pImage->cbFileCurrent / 512); pImage->cbFileCurrent += pImage->PCHSGeometry.cSectors * 512; pImage->fAllocationBitmapChanged = true; uOffsetInFile = (uint64_t)pImage->pAllocationBitmap[iIndexInAllocationTable] * 512; /* * Write the new block at the current end of the file. */ rc = vdIfIoIntFileWriteUser(pImage->pIfIo, pImage->pStorage, uOffsetInFile, pIoCtx, cbToWrite, NULL, NULL); if (RT_SUCCESS(rc) || (rc == VERR_VD_ASYNC_IO_IN_PROGRESS)) { /* Write the changed allocation bitmap entry. */ /** @todo: Error handling. */ rc = vdIfIoIntFileWriteMeta(pImage->pIfIo, pImage->pStorage, sizeof(ParallelsHeader) + iIndexInAllocationTable * sizeof(uint32_t), &pImage->pAllocationBitmap[iIndexInAllocationTable], sizeof(uint32_t), pIoCtx, NULL, NULL); } *pcbPreRead = 0; *pcbPostRead = 0; } else { uOffsetInFile = (pImage->pAllocationBitmap[iIndexInAllocationTable] + uSector) * 512; rc = vdIfIoIntFileWriteUser(pImage->pIfIo, pImage->pStorage, uOffsetInFile, pIoCtx, cbToWrite, NULL, NULL); } } if (pcbWriteProcess) *pcbWriteProcess = cbToWrite; LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnFlush */ static int parallelsFlush(void *pBackendData, PVDIOCTX pIoCtx) { int rc = VINF_SUCCESS; PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; LogFlowFunc(("pImage=#%p\n", pImage)); /* Flush the file, everything is up to date already. */ rc = vdIfIoIntFileFlush(pImage->pIfIo, pImage->pStorage, pIoCtx, NULL, NULL); LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnGetVersion */ static unsigned parallelsGetVersion(void *pBackendData) { LogFlowFunc(("pBackendData=%#p\n", pBackendData)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; AssertPtr(pImage); if (pImage) return PARALLELS_DISK_VERSION; else return 0; } /** @copydoc VBOXHDDBACKEND::pfnGetSectorSize */ static uint32_t parallelsGetSectorSize(void *pBackendData) { LogFlowFunc(("pBackendData=%#p\n", pBackendData)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; uint32_t cb = 0; AssertPtr(pImage); if (pImage && pImage->pStorage) cb = 512; LogFlowFunc(("returns %llu\n", cb)); return cb; } /** @copydoc VBOXHDDBACKEND::pfnGetSize */ static uint64_t parallelsGetSize(void *pBackendData) { LogFlowFunc(("pBackendData=%#p\n", pBackendData)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; uint64_t cb = 0; AssertPtr(pImage); if (pImage && pImage->pStorage) cb = pImage->cbSize; LogFlowFunc(("returns %llu\n", cb)); return cb; } /** @copydoc VBOXHDDBACKEND::pfnGetFileSize */ static uint64_t parallelsGetFileSize(void *pBackendData) { LogFlowFunc(("pBackendData=%#p\n", pBackendData)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; uint64_t cb = 0; AssertPtr(pImage); if (pImage && pImage->pStorage) cb = pImage->cbFileCurrent; LogFlowFunc(("returns %lld\n", cb)); return cb; } /** @copydoc VBOXHDDBACKEND::pfnGetPCHSGeometry */ static int parallelsGetPCHSGeometry(void *pBackendData, PVDGEOMETRY pPCHSGeometry) { LogFlowFunc(("pBackendData=%#p pPCHSGeometry=%#p\n", pBackendData, pPCHSGeometry)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; AssertPtr(pImage); if (pImage) { if (pImage->PCHSGeometry.cCylinders) { *pPCHSGeometry = pImage->PCHSGeometry; rc = VINF_SUCCESS; } else rc = VERR_VD_GEOMETRY_NOT_SET; } else rc = VERR_VD_NOT_OPENED; LogFlowFunc(("returns %Rrc (PCHS=%u/%u/%u)\n", rc, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnSetPCHSGeometry */ static int parallelsSetPCHSGeometry(void *pBackendData, PCVDGEOMETRY pPCHSGeometry) { LogFlowFunc(("pBackendData=%#p pPCHSGeometry=%#p PCHS=%u/%u/%u\n", pBackendData, pPCHSGeometry, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; AssertPtr(pImage); if (pImage) { if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY) { rc = VERR_VD_IMAGE_READ_ONLY; goto out; } pImage->PCHSGeometry = *pPCHSGeometry; rc = VINF_SUCCESS; } else rc = VERR_VD_NOT_OPENED; out: LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnGetLCHSGeometry */ static int parallelsGetLCHSGeometry(void *pBackendData, PVDGEOMETRY pLCHSGeometry) { LogFlowFunc(("pBackendData=%#p pLCHSGeometry=%#p\n", pBackendData, pLCHSGeometry)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; AssertPtr(pImage); if (pImage) { if (pImage->LCHSGeometry.cCylinders) { *pLCHSGeometry = pImage->LCHSGeometry; rc = VINF_SUCCESS; } else rc = VERR_VD_GEOMETRY_NOT_SET; } else rc = VERR_VD_NOT_OPENED; LogFlowFunc(("returns %Rrc (LCHS=%u/%u/%u)\n", rc, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnSetLCHSGeometry */ static int parallelsSetLCHSGeometry(void *pBackendData, PCVDGEOMETRY pLCHSGeometry) { LogFlowFunc(("pBackendData=%#p pLCHSGeometry=%#p LCHS=%u/%u/%u\n", pBackendData, pLCHSGeometry, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; AssertPtr(pImage); if (pImage) { if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY) { rc = VERR_VD_IMAGE_READ_ONLY; goto out; } pImage->LCHSGeometry = *pLCHSGeometry; rc = VINF_SUCCESS; } else rc = VERR_VD_NOT_OPENED; out: LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnGetImageFlags */ static unsigned parallelsGetImageFlags(void *pBackendData) { LogFlowFunc(("pBackendData=%#p\n", pBackendData)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; unsigned uImageFlags; AssertPtr(pImage); if (pImage) uImageFlags = pImage->uImageFlags; else uImageFlags = 0; LogFlowFunc(("returns %#x\n", uImageFlags)); return uImageFlags; } /** @copydoc VBOXHDDBACKEND::pfnGetOpenFlags */ static unsigned parallelsGetOpenFlags(void *pBackendData) { LogFlowFunc(("pBackendData=%#p\n", pBackendData)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; unsigned uOpenFlags; AssertPtr(pImage); if (pImage) uOpenFlags = pImage->uOpenFlags; else uOpenFlags = 0; LogFlowFunc(("returns %#x\n", uOpenFlags)); return uOpenFlags; } /** @copydoc VBOXHDDBACKEND::pfnSetOpenFlags */ static int parallelsSetOpenFlags(void *pBackendData, unsigned uOpenFlags) { LogFlowFunc(("pBackendData=%#p\n uOpenFlags=%#x", pBackendData, uOpenFlags)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; /* Image must be opened and the new flags must be valid. */ if (!pImage || (uOpenFlags & ~( VD_OPEN_FLAGS_READONLY | VD_OPEN_FLAGS_INFO | VD_OPEN_FLAGS_ASYNC_IO | VD_OPEN_FLAGS_SHAREABLE | VD_OPEN_FLAGS_SEQUENTIAL | VD_OPEN_FLAGS_SKIP_CONSISTENCY_CHECKS))) { rc = VERR_INVALID_PARAMETER; goto out; } /* Implement this operation via reopening the image. */ parallelsFreeImage(pImage, false); rc = parallelsOpenImage(pImage, uOpenFlags); out: LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnGetComment */ static int parallelsGetComment(void *pBackendData, char *pszComment, size_t cbComment) { LogFlowFunc(("pBackendData=%#p pszComment=%#p cbComment=%zu\n", pBackendData, pszComment, cbComment)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; AssertPtr(pImage); if (pImage) rc = VERR_NOT_SUPPORTED; else rc = VERR_VD_NOT_OPENED; LogFlowFunc(("returns %Rrc comment='%s'\n", rc, pszComment)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnSetComment */ static int parallelsSetComment(void *pBackendData, const char *pszComment) { LogFlowFunc(("pBackendData=%#p pszComment=\"%s\"\n", pBackendData, pszComment)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; AssertPtr(pImage); if (pImage) { if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY) rc = VERR_VD_IMAGE_READ_ONLY; else rc = VERR_NOT_SUPPORTED; } else rc = VERR_VD_NOT_OPENED; LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnGetUuid */ static int parallelsGetUuid(void *pBackendData, PRTUUID pUuid) { LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; AssertPtr(pImage); if (pImage) rc = VERR_NOT_SUPPORTED; else rc = VERR_VD_NOT_OPENED; LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnSetUuid */ static int parallelsSetUuid(void *pBackendData, PCRTUUID pUuid) { LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; AssertPtr(pImage); if (pImage) { if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)) rc = VERR_NOT_SUPPORTED; else rc = VERR_VD_IMAGE_READ_ONLY; } else rc = VERR_VD_NOT_OPENED; LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnGetModificationUuid */ static int parallelsGetModificationUuid(void *pBackendData, PRTUUID pUuid) { LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; AssertPtr(pImage); if (pImage) rc = VERR_NOT_SUPPORTED; else rc = VERR_VD_NOT_OPENED; LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnSetModificationUuid */ static int parallelsSetModificationUuid(void *pBackendData, PCRTUUID pUuid) { LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; AssertPtr(pImage); if (pImage) { if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)) rc = VERR_NOT_SUPPORTED; else rc = VERR_VD_IMAGE_READ_ONLY; } else rc = VERR_VD_NOT_OPENED; LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnGetParentUuid */ static int parallelsGetParentUuid(void *pBackendData, PRTUUID pUuid) { LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; AssertPtr(pImage); if (pImage) rc = VERR_NOT_SUPPORTED; else rc = VERR_VD_NOT_OPENED; LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnSetParentUuid */ static int parallelsSetParentUuid(void *pBackendData, PCRTUUID pUuid) { LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; AssertPtr(pImage); if (pImage) { if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)) rc = VERR_NOT_SUPPORTED; else rc = VERR_VD_IMAGE_READ_ONLY; } else rc = VERR_VD_NOT_OPENED; LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnGetParentModificationUuid */ static int parallelsGetParentModificationUuid(void *pBackendData, PRTUUID pUuid) { LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; AssertPtr(pImage); if (pImage) rc = VERR_NOT_SUPPORTED; else rc = VERR_VD_NOT_OPENED; LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnSetParentModificationUuid */ static int parallelsSetParentModificationUuid(void *pBackendData, PCRTUUID pUuid) { LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid)); PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; int rc; AssertPtr(pImage); if (pImage) { if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)) rc = VERR_NOT_SUPPORTED; else rc = VERR_VD_IMAGE_READ_ONLY; } else rc = VERR_VD_NOT_OPENED; LogFlowFunc(("returns %Rrc\n", rc)); return rc; } /** @copydoc VBOXHDDBACKEND::pfnDump */ static void parallelsDump(void *pBackendData) { PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData; AssertPtr(pImage); if (pImage) { vdIfErrorMessage(pImage->pIfError, "Header: Geometry PCHS=%u/%u/%u LCHS=%u/%u/%u\n", pImage->PCHSGeometry.cCylinders, pImage->PCHSGeometry.cHeads, pImage->PCHSGeometry.cSectors, pImage->LCHSGeometry.cCylinders, pImage->LCHSGeometry.cHeads, pImage->LCHSGeometry.cSectors); } } const VBOXHDDBACKEND g_ParallelsBackend = { /* pszBackendName */ "Parallels", /* cbSize */ sizeof(VBOXHDDBACKEND), /* uBackendCaps */ VD_CAP_FILE | VD_CAP_ASYNC | VD_CAP_VFS | VD_CAP_CREATE_DYNAMIC | VD_CAP_DIFF, /* paFileExtensions */ s_aParallelsFileExtensions, /* paConfigInfo */ NULL, /* pfnCheckIfValid */ parallelsCheckIfValid, /* pfnOpen */ parallelsOpen, /* pfnCreate */ parallelsCreate, /* pfnRename */ parallelsRename, /* pfnClose */ parallelsClose, /* pfnRead */ parallelsRead, /* pfnWrite */ parallelsWrite, /* pfnFlush */ parallelsFlush, /* pfnDiscard */ NULL, /* pfnGetVersion */ parallelsGetVersion, /* pfnGetSectorSize */ parallelsGetSectorSize, /* pfnGetSize */ parallelsGetSize, /* pfnGetFileSize */ parallelsGetFileSize, /* pfnGetPCHSGeometry */ parallelsGetPCHSGeometry, /* pfnSetPCHSGeometry */ parallelsSetPCHSGeometry, /* pfnGetLCHSGeometry */ parallelsGetLCHSGeometry, /* pfnSetLCHSGeometry */ parallelsSetLCHSGeometry, /* pfnGetImageFlags */ parallelsGetImageFlags, /* pfnGetOpenFlags */ parallelsGetOpenFlags, /* pfnSetOpenFlags */ parallelsSetOpenFlags, /* pfnGetComment */ parallelsGetComment, /* pfnSetComment */ parallelsSetComment, /* pfnGetUuid */ parallelsGetUuid, /* pfnSetUuid */ parallelsSetUuid, /* pfnGetModificationUuid */ parallelsGetModificationUuid, /* pfnSetModificationUuid */ parallelsSetModificationUuid, /* pfnGetParentUuid */ parallelsGetParentUuid, /* pfnSetParentUuid */ parallelsSetParentUuid, /* pfnGetParentModificationUuid */ parallelsGetParentModificationUuid, /* pfnSetParentModificationUuid */ parallelsSetParentModificationUuid, /* pfnDump */ parallelsDump, /* pfnGetTimeStamp */ NULL, /* pfnGetParentTimeStamp */ NULL, /* pfnSetParentTimeStamp */ NULL, /* pfnGetParentFilename */ NULL, /* pfnSetParentFilename */ NULL, /* pfnComposeLocation */ genericFileComposeLocation, /* pfnComposeName */ genericFileComposeName, /* pfnCompact */ NULL, /* pfnResize */ NULL, /* pfnRepair */ NULL, /* pfnTraverseMetadata */ NULL };