/** $Id$ */ /** @file * VBox HDD Container implementation. */ /* * Copyright (C) 2006-2007 innotek GmbH * * 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 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. * * If you received this file as part of a commercial VirtualBox * distribution, then only the terms of your commercial VirtualBox * license agreement apply instead of the previous paragraph. */ /******************************************************************************* * Header Files * *******************************************************************************/ #define LOG_GROUP LOG_GROUP_VD #include #include #include #include #include #include #include #include #include #include "VBoxHDD-newInternal.h" #define VBOXHDDDISK_SIGNATURE 0x6f0e2a7d /** * VBox HDD Container image descriptor. */ typedef struct VDIMAGE { /** Link to parent image descriptor, if any. */ struct VDIMAGE *pPrev; /** Link to child image descriptor, if any. */ struct VDIMAGE *pNext; /** Container base filename. (UTF-8) */ char *pszFilename; /** Data managed by the backend which keeps the actual info. */ void *pvBackendData; /** Image open flags (only those handled generically in this code and which * the backends will never ever see). */ unsigned uOpenFlags; } VDIMAGE, *PVDIMAGE; /** * uModified bit flags. */ #define VD_IMAGE_MODIFIED_FLAG BIT(0) #define VD_IMAGE_MODIFIED_FIRST BIT(1) #define VD_IMAGE_MODIFIED_DISABLE_UUID_UPDATE BIT(2) /** * VBox HDD Container main structure, private part. */ struct VBOXHDD { /** Structure signature (VBOXHDDDISK_SIGNATURE). */ uint32_t u32Signature; /** Number of opened images. */ unsigned cImages; /** Base image. */ PVDIMAGE pBase; /** Last opened image in the chain. * The same as pBase if only one image is used. */ PVDIMAGE pLast; /** Flags representing the modification state. */ unsigned uModified; /** Cached size of this disk. */ uint64_t cbSize; /** Cached CHS geometry for this disk, cylinders. */ unsigned cCylinders; /** Cached CHS geometry for this disk, heads. */ unsigned cHeads; /** Cached CHS geometry for this disk, sectors. */ unsigned cSectors; /** Cached translation mode for this disk. */ PDMBIOSTRANSLATION enmTranslation; /** Error message processing callback. */ PFNVDERROR pfnError; /** Opaque data for error callback. */ void *pvErrorUser; /** Function pointers for the various backend methods. */ PVBOXHDDBACKEND Backend; }; typedef struct { const char *pszBackendName; PVBOXHDDBACKEND Backend; } VBOXHDDBACKENDENTRY; extern VBOXHDDBACKEND g_VmdkBackend; static const VBOXHDDBACKENDENTRY aBackends[] = { { "VMDK", &g_VmdkBackend }, { NULL, NULL } }; /** * internal: issue early error message. */ static int vdEarlyError(PFNVDERROR pfnError, void *pvErrorUser, int rc, RT_SRC_POS_DECL, const char *pszFormat, ...) { va_list va; va_start(va, pszFormat); if (pfnError) pfnError(pvErrorUser, rc, RT_SRC_POS_ARGS, pszFormat, va); va_end(va); return rc; } /** * internal: issue error message. */ static int vdError(PVBOXHDD pDisk, int rc, RT_SRC_POS_DECL, const char *pszFormat, ...) { va_list va; va_start(va, pszFormat); if (pDisk->pfnError) pDisk->pfnError(pDisk->pvErrorUser, rc, RT_SRC_POS_ARGS, pszFormat, va); va_end(va); return rc; } /** * internal: add image structure to the end of images list. */ static void vdAddImageToList(PVBOXHDD pDisk, PVDIMAGE pImage) { pImage->pPrev = NULL; pImage->pNext = NULL; if (pDisk->pBase) { Assert(pDisk->cImages > 0); pImage->pPrev = pDisk->pLast; pDisk->pLast->pNext = pImage; pDisk->pLast = pImage; } else { Assert(pDisk->cImages == 0); pDisk->pBase = pImage; pDisk->pLast = pImage; } pDisk->cImages++; } /** * internal: remove image structure from the images list. */ static void vdRemoveImageFromList(PVBOXHDD pDisk, PVDIMAGE pImage) { Assert(pDisk->cImages > 0); if (pImage->pPrev) pImage->pPrev->pNext = pImage->pNext; else pDisk->pBase = pImage->pNext; if (pImage->pNext) pImage->pNext->pPrev = pImage->pPrev; else pDisk->pLast = pImage->pPrev; pImage->pPrev = NULL; pImage->pNext = NULL; pDisk->cImages--; } /** * internal: find image by index into the images list. */ static PVDIMAGE vdGetImageByNumber(PVBOXHDD pDisk, unsigned nImage) { PVDIMAGE pImage = pDisk->pBase; while (pImage && nImage) { pImage = pImage->pNext; nImage--; } return pImage; } /** * internal: read the specified amount of data in whatever blocks the backend * will give us. */ static int vdReadHelper(PVBOXHDD pDisk, PVDIMAGE pImage, uint64_t uOffset, void *pvBuf, size_t cbRead) { int rc; size_t cbThisRead; PVDIMAGE pCurrImage; /* Loop until all read. */ do { /* Search for image with allocated block. Do not attempt to read more * than the previous reads marked as valid. Otherwise this would return * stale data when different block sizes are used for the images. */ cbThisRead = cbRead; rc = VINF_VDI_BLOCK_FREE; for (pCurrImage = pImage; pCurrImage != NULL && rc == VINF_VDI_BLOCK_FREE; pCurrImage = pCurrImage->pPrev) { rc = pDisk->Backend->pfnRead(pCurrImage->pvBackendData, uOffset, pvBuf, cbThisRead, &cbThisRead); } /* No image in the chain contains the data for the block. */ if (rc == VINF_VDI_BLOCK_FREE) { memset(pvBuf, '\0', cbThisRead); rc = VINF_SUCCESS; } cbRead -= cbThisRead; uOffset += cbThisRead; pvBuf = (char *)pvBuf + cbThisRead; } while (cbRead != 0 && VBOX_SUCCESS(rc)); return rc; } /** * internal: mark the disk as not modified. */ static void vdResetModifiedFlag(PVBOXHDD pDisk) { if (pDisk->uModified & VD_IMAGE_MODIFIED_FLAG) { /* generate new last-modified uuid */ if (!(pDisk->uModified | VD_IMAGE_MODIFIED_DISABLE_UUID_UPDATE)) { RTUUID Uuid; RTUuidCreate(&Uuid); pDisk->Backend->pfnSetModificationUuid(pDisk->pLast->pvBackendData, &Uuid); } pDisk->uModified &= ~VD_IMAGE_MODIFIED_FLAG; } } /** * internal: mark the disk as modified. */ static void vdSetModifiedFlag(PVBOXHDD pDisk) { pDisk->uModified |= VD_IMAGE_MODIFIED_FLAG; if (pDisk->uModified & VD_IMAGE_MODIFIED_FIRST) { pDisk->uModified &= ~VD_IMAGE_MODIFIED_FIRST; /* First modify, so create a UUID and ensure it's written to disk. */ vdResetModifiedFlag(pDisk); if (!(pDisk->uModified | VD_IMAGE_MODIFIED_DISABLE_UUID_UPDATE)) pDisk->Backend->pfnFlush(pDisk->pLast->pvBackendData); } } /** * internal: write a complete block (only used for diff images), taking the * remaining data from parent images. This implementation does not optimize * anything (except that it tries to read only that portions from parent * images that are really needed). */ static int vdWriteHelperStandard(PVBOXHDD pDisk, PVDIMAGE pImage, uint64_t uOffset, size_t cbWrite, size_t cbThisWrite, size_t cbPreRead, size_t cbPostRead, const void *pvBuf, void *pvTmp) { int rc = VINF_SUCCESS; /* Read the data that goes before the write to fill the block. */ if (cbPreRead) { rc = vdReadHelper(pDisk, pImage->pPrev, uOffset - cbPreRead, pvTmp, cbPreRead); if (VBOX_FAILURE(rc)) return rc; } /* Copy the data to the right place in the buffer. */ memcpy((char *)pvTmp + cbPreRead, pvBuf, cbThisWrite); /* Read the data that goes after the write to fill the block. */ if (cbPostRead) { /* If we have data to be written, use that instead of reading * data from the image. */ size_t cbWriteCopy; if (cbWrite > cbThisWrite) cbWriteCopy = RT_MIN(cbWrite - cbThisWrite, cbPostRead); else cbWriteCopy = 0; /* Figure out how much we cannnot read from the image, because * the last block to write might exceed the nominal size of the * image for technical reasons. */ size_t cbFill; if (uOffset + cbThisWrite + cbPostRead > pDisk->cbSize) cbFill = uOffset + cbThisWrite + cbPostRead - pDisk->cbSize; else cbFill = 0; /* The rest must be read from the image. */ size_t cbReadImage = cbPostRead - cbWriteCopy - cbFill; /* Now assemble the remaining data. */ if (cbWriteCopy) memcpy((char *)pvTmp + cbPreRead + cbThisWrite, (char *)pvBuf + cbThisWrite, cbWriteCopy); if (cbReadImage) rc = vdReadHelper(pDisk, pImage->pPrev, uOffset + cbThisWrite + cbWriteCopy, (char *)pvTmp + cbPreRead + cbThisWrite + cbWriteCopy, cbReadImage); if (VBOX_FAILURE(rc)) return rc; /* Zero out the remainder of this block. Will never be visible, as this * is beyond the limit of the image. */ if (cbFill) memset((char *)pvTmp + cbPreRead + cbThisWrite + cbWriteCopy + cbReadImage, '\0', cbFill); } /* Write the full block to the virtual disk. */ rc = pDisk->Backend->pfnWrite(pImage->pvBackendData, uOffset - cbPreRead, pvTmp, cbPreRead + cbThisWrite + cbPostRead, NULL, &cbPreRead, &cbPostRead); Assert(rc != VINF_VDI_BLOCK_FREE); Assert(cbPreRead == 0); Assert(cbPostRead == 0); return rc; } /** * internal: write a complete block (only used for diff images), taking the * remaining data from parent images. This implementation optimized out writes * that do not change the data relative to the state as of the parent images. * All backends which support differential/growing images support this. */ static int vdWriteHelperOptimized(PVBOXHDD pDisk, PVDIMAGE pImage, uint64_t uOffset, size_t cbWrite, size_t cbThisWrite, size_t cbPreRead, size_t cbPostRead, const void *pvBuf, void *pvTmp) { size_t cbFill = 0; size_t cbWriteCopy = 0; size_t cbReadImage = 0; int rc; if (cbPostRead) { /* Figure out how much we cannnot read from the image, because * the last block to write might exceed the nominal size of the * image for technical reasons. */ if (uOffset + cbThisWrite + cbPostRead > pDisk->cbSize) cbFill = uOffset + cbThisWrite + cbPostRead - pDisk->cbSize; /* If we have data to be written, use that instead of reading * data from the image. */ if (cbWrite > cbThisWrite) cbWriteCopy = RT_MIN(cbWrite - cbThisWrite, cbPostRead); /* The rest must be read from the image. */ cbReadImage = cbPostRead - cbWriteCopy - cbFill; } /* Read the entire data of the block so that we can compare whether it will * be modified by the write or not. */ rc = vdReadHelper(pDisk, pImage->pPrev, uOffset - cbPreRead, pvTmp, cbPreRead + cbThisWrite + cbPostRead - cbFill); if (VBOX_FAILURE(rc)) return rc; /* Check if the write would modify anything in this block. */ if ( !memcmp((char *)pvTmp + cbPreRead, pvBuf, cbThisWrite) && (!cbWriteCopy || !memcmp((char *)pvTmp + cbPreRead + cbThisWrite, (char *)pvBuf + cbThisWrite, cbWriteCopy))) { /* Block is completely unchanged, so no need to write anything. */ return VINF_SUCCESS; } /* Copy the data to the right place in the buffer. */ memcpy((char *)pvTmp + cbPreRead, pvBuf, cbThisWrite); /* Handle the data that goes after the write to fill the block. */ if (cbPostRead) { /* Now assemble the remaining data. */ if (cbWriteCopy) memcpy((char *)pvTmp + cbPreRead + cbThisWrite, (char *)pvBuf + cbThisWrite, cbWriteCopy); /* Zero out the remainder of this block. Will never be visible, as this * is beyond the limit of the image. */ if (cbFill) memset((char *)pvTmp + cbPreRead + cbThisWrite + cbWriteCopy + cbReadImage, '\0', cbFill); } /* Write the full block to the virtual disk. */ rc = pDisk->Backend->pfnWrite(pImage->pvBackendData, uOffset - cbPreRead, pvTmp, cbPreRead + cbThisWrite + cbPostRead, NULL, &cbPreRead, &cbPostRead); Assert(rc != VINF_VDI_BLOCK_FREE); Assert(cbPreRead == 0); Assert(cbPostRead == 0); return rc; } /** * Allocates and initializes an empty VBox HDD container. * No image files are opened. * * @returns VBox status code. * @param pszBackend Name of the image file backend to use. * @param pfnError Callback for setting extended error information. * @param pvErrorUser Opaque parameter for pfnError. * @param ppDisk Where to store the reference to the VBox HDD container. */ VBOXDDU_DECL(int) VDCreate(const char *pszBackend, PFNVDERROR pfnError, void *pvErrorUser, PVBOXHDD *ppDisk) { int rc = VINF_SUCCESS; PVBOXHDDBACKEND pBackend = NULL; PVBOXHDD pDisk = NULL; /* Passing an error callback is strictly not necessary any more. Any code * calling the HDD container functions should provide one, as otherwise * many detailed error messages will go unnoticed. If you find a situation * where you get no sensible error message from this code but you think * there should be one, shout loudly. There are no error messages for rare * and obvious error codes such as VERR_NO_MEMORY, and for situations which * the user cannot be made responsible for, such as program bugs causing * parameter checks to fail etc. */ Assert(pfnError); /* Find backend. */ for (unsigned i = 0; aBackends[i].pszBackendName != NULL; i++) { if (!strcmp(pszBackend, aBackends[i].pszBackendName)) { pBackend = aBackends[i].Backend; break; } } if (pBackend) { pDisk = (PVBOXHDD)RTMemAllocZ(sizeof(VBOXHDD)); if (pDisk) { pDisk->u32Signature = VBOXHDDDISK_SIGNATURE; pDisk->cImages = 0; pDisk->pBase = NULL; pDisk->pLast = NULL; pDisk->cbSize = 0; pDisk->cCylinders = 0; pDisk->cHeads = 0; pDisk->cSectors = 0; pDisk->pfnError = pfnError; pDisk->pvErrorUser = pvErrorUser; pDisk->Backend = pBackend; *ppDisk = pDisk; } else rc = VERR_NO_MEMORY; } else rc = vdEarlyError(pfnError, pvErrorUser, VERR_INVALID_PARAMETER, RT_SRC_POS, "VD: unknown backend name '%s'", pszBackend); LogFlow(("%s: returns %Vrc (pDisk=%#p)\n", __FUNCTION__, rc, pDisk)); return rc; } /** * Destroys the VBox HDD container. * If container has opened image files they will be closed. * * @param pDisk Pointer to VBox HDD container. */ VBOXDDU_DECL(void) VDDestroy(PVBOXHDD pDisk) { LogFlow(("%s: pDisk=%#p\n", pDisk)); /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); if (pDisk) { VDCloseAll(pDisk); RTMemFree(pDisk); } } /** * Opens an image file. * * The first opened image file in a HDD container must have a base image type, * others (next opened images) must be a differencing or undo images. * Linkage is checked for differencing image to be in consistence with the previously opened image. * When another differencing image is opened and the last image was opened in read/write access * mode, then the last image is reopened in read-only with deny write sharing mode. This allows * other processes to use images in read-only mode too. * * Note that the image can be opened in read-only mode if a read/write open is not possible. * Use VDIsReadOnly to check open mode. * * @returns VBox status code. * @param pDisk Pointer to VBox HDD container. * @param pszFilename Name of the image file to open. * @param uOpenFlags Image file open mode, see VD_OPEN_FLAGS_* constants. */ VBOXDDU_DECL(int) VDOpen(PVBOXHDD pDisk, const char *pszFilename, unsigned uOpenFlags) { int rc = VINF_SUCCESS; LogFlow(("%s: pszFilename=\"%s\" uOpenFlags=%#x\n", __FUNCTION__, pszFilename, uOpenFlags)); /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); /* Check arguments. */ if ( !pszFilename || *pszFilename == '\0' || (uOpenFlags & ~VD_OPEN_FLAGS_MASK)) { AssertMsgFailed(("Invalid arguments: pszFilename=%#p uOpenFlags=%#x\n", pszFilename, uOpenFlags)); return VERR_INVALID_PARAMETER; } /* Force readonly for images without base/diff consistency checking. */ if (uOpenFlags & VD_OPEN_FLAGS_INFO) uOpenFlags |= VD_OPEN_FLAGS_READONLY; /* Set up image descriptor. */ PVDIMAGE pImage = (PVDIMAGE)RTMemAllocZ(sizeof(VDIMAGE)); if (!pImage) return VERR_NO_MEMORY; pImage->pszFilename = RTStrDup(pszFilename); if (!pImage->pszFilename) rc = VERR_NO_MEMORY; if (VBOX_SUCCESS(rc)) { pImage->uOpenFlags = uOpenFlags & VD_OPEN_FLAGS_HONOR_SAME; rc = pDisk->Backend->pfnOpen(pImage->pszFilename, uOpenFlags & ~VD_OPEN_FLAGS_HONOR_SAME, pDisk->pfnError, pDisk->pvErrorUser, &pImage->pvBackendData); } /* If the open in read-write mode failed, retry in read-only mode. */ if (VBOX_FAILURE(rc)) { if (!(uOpenFlags & VD_OPEN_FLAGS_READONLY) && (rc == VERR_ACCESS_DENIED || rc == VERR_PERMISSION_DENIED || rc == VERR_WRITE_PROTECT || rc == VERR_SHARING_VIOLATION || rc == VERR_FILE_LOCK_FAILED)) rc = pDisk->Backend->pfnOpen(pImage->pszFilename, (uOpenFlags & ~VD_OPEN_FLAGS_HONOR_SAME) | VD_OPEN_FLAGS_READONLY, pDisk->pfnError, pDisk->pvErrorUser, &pImage->pvBackendData); if (VBOX_FAILURE(rc)) rc = vdError(pDisk, rc, RT_SRC_POS, N_("VD: error opening image file '%s'"), pszFilename); } if (VBOX_SUCCESS(rc)) { VDIMAGETYPE enmImageType; rc = pDisk->Backend->pfnGetImageType(pImage->pvBackendData, &enmImageType); /* Check image type. As the image itself has no idea whether it's a * base image or not, this info is derived here. Image 0 can be fixed * or normal, all others must be normal images. */ if ( VBOX_SUCCESS(rc) && !(uOpenFlags & VD_OPEN_FLAGS_INFO) && pDisk->cImages != 0 && enmImageType != VD_IMAGE_TYPE_NORMAL) rc = VERR_VDI_INVALID_TYPE; /** @todo optionally check UUIDs */ if (VBOX_SUCCESS(rc)) { uint64_t cbSize = pDisk->Backend->pfnGetSize(pImage->pvBackendData); if (pDisk->cImages == 0) { /* Cache disk information. */ pDisk->cbSize = cbSize; /* Cache CHS geometry. */ int rc2 = pDisk->Backend->pfnGetGeometry(pImage->pvBackendData, &pDisk->cCylinders, &pDisk->cHeads, &pDisk->cSectors); if (VBOX_FAILURE(rc2)) { pDisk->cCylinders = 0; pDisk->cHeads = 0; pDisk->cSectors = 0; } else { /* Make sure the CHS geometry is properly clipped. */ pDisk->cCylinders = RT_MIN(pDisk->cCylinders, 16383); pDisk->cHeads = RT_MIN(pDisk->cHeads, 255); pDisk->cSectors = RT_MIN(pDisk->cSectors, 255); } /* Cache translation mode. */ rc2 = pDisk->Backend->pfnGetTranslation(pImage->pvBackendData, &pDisk->enmTranslation); if (VBOX_FAILURE(rc2)) pDisk->enmTranslation = (PDMBIOSTRANSLATION)0; } else { /* Check image size/block size for consistency. */ if (cbSize != pDisk->cbSize) rc = VERR_VDI_INVALID_TYPE; } } if (VBOX_SUCCESS(rc) && pDisk->cImages != 0) { /* Switch previous image to read-only mode. */ unsigned uOpenFlagsPrevImg; uOpenFlagsPrevImg = pDisk->Backend->pfnGetOpenFlags(pDisk->pLast->pvBackendData); if (!(uOpenFlagsPrevImg & VD_OPEN_FLAGS_READONLY)) { uOpenFlagsPrevImg |= VD_OPEN_FLAGS_READONLY; rc = pDisk->Backend->pfnSetOpenFlags(pDisk->pLast->pvBackendData, uOpenFlagsPrevImg); } } if (VBOX_SUCCESS(rc)) { /* Image successfully opened, make it the last image. */ vdAddImageToList(pDisk, pImage); } else { /* Error detected, but image opened. Close image. */ int rc2; rc2 = pDisk->Backend->pfnClose(pImage->pvBackendData, false); AssertRC(rc2); pImage->pvBackendData = NULL; } } if (VBOX_FAILURE(rc)) { if (pImage) { if (pImage->pszFilename) RTStrFree(pImage->pszFilename); RTMemFree(pImage); } } LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc)); return rc; } /** * Creates and opens a new base image file. * * @returns VBox status code. * @param pDisk Pointer to VBox HDD container. * @param pszFilename Name of the image file to create. * @param enmType Image type, only base image types are acceptable. * @param cbSize Image size in bytes. * @param uImageFlags Flags specifying special image features. * @param pszComment Pointer to image comment. NULL is ok. * @param cCylinders Number of cylinders (must be <= 16383). * @param cHeads Number of heads (must be <= 16). * @param cSectors Number of sectors (must be <= 63); * @param uOpenFlags Image file open mode, see VD_OPEN_FLAGS_* constants. * @param pfnProgress Progress callback. Optional. NULL if not to be used. * @param pvUser User argument for the progress callback. */ VBOXDDU_DECL(int) VDCreateBase(PVBOXHDD pDisk, const char *pszFilename, VDIMAGETYPE enmType, uint64_t cbSize, unsigned uImageFlags, const char *pszComment, unsigned cCylinders, unsigned cHeads, unsigned cSectors, unsigned uOpenFlags, PFNVMPROGRESS pfnProgress, void *pvUser) { int rc = VINF_SUCCESS; LogFlow(("%s: pszFilename=\"%s\" uOpenFlags=%#x\n", __FUNCTION__, pszFilename, uOpenFlags)); /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); /* Check arguments. */ if ( !pszFilename || *pszFilename == '\0' || (enmType != VD_IMAGE_TYPE_NORMAL && enmType != VD_IMAGE_TYPE_FIXED) || !cbSize || (uOpenFlags & ~VD_OPEN_FLAGS_MASK) || cCylinders == 0 || cCylinders > 16383 || cHeads == 0 || cHeads > 16 || cSectors == 0 || cSectors > 63) { AssertMsgFailed(("Invalid arguments: pszFilename=%#p uOpenFlags=%#x\n", pszFilename, uOpenFlags)); return VERR_INVALID_PARAMETER; } /* Check state. */ if (pDisk->cImages != 0) { AssertMsgFailed(("Create base image cannot be done with other images open\n")); return VERR_VDI_INVALID_STATE; } /* Set up image descriptor. */ PVDIMAGE pImage = (PVDIMAGE)RTMemAllocZ(sizeof(VDIMAGE)); if (!pImage) return VERR_NO_MEMORY; pImage->pszFilename = RTStrDup(pszFilename); if (!pImage->pszFilename) rc = VERR_NO_MEMORY; if (VBOX_SUCCESS(rc)) rc = pDisk->Backend->pfnCreate(pImage->pszFilename, enmType, cbSize, uImageFlags, pszComment, cCylinders, cHeads, cSectors, uOpenFlags, pfnProgress, pvUser, pDisk->pfnError, pDisk->pvErrorUser, &pImage->pvBackendData); if (VBOX_SUCCESS(rc)) { /** @todo optionally check UUIDs */ if (VBOX_SUCCESS(rc)) { uint64_t cbSize = pDisk->Backend->pfnGetSize(pImage->pvBackendData); if (pDisk->cImages == 0) { /* Cache disk information. */ pDisk->cbSize = cbSize; /* Cache CHS geometry. */ int rc2 = pDisk->Backend->pfnGetGeometry(pImage->pvBackendData, &pDisk->cCylinders, &pDisk->cHeads, &pDisk->cSectors); if (VBOX_FAILURE(rc2)) { pDisk->cCylinders = 0; pDisk->cHeads = 0; pDisk->cSectors = 0; } else { /* Make sure the CHS geometry is properly clipped. */ pDisk->cCylinders = RT_MIN(pDisk->cCylinders, 16383); pDisk->cHeads = RT_MIN(pDisk->cHeads, 255); pDisk->cSectors = RT_MIN(pDisk->cSectors, 255); } /* Cache translation mode. */ rc2 = pDisk->Backend->pfnGetTranslation(pImage->pvBackendData, &pDisk->enmTranslation); if (VBOX_FAILURE(rc2)) pDisk->enmTranslation = (PDMBIOSTRANSLATION)0; } else { /* Check image size/block size for consistency. */ if (cbSize != pDisk->cbSize) rc = VERR_VDI_INVALID_TYPE; } } if (VBOX_SUCCESS(rc)) { /* Image successfully opened, make it the last image. */ vdAddImageToList(pDisk, pImage); } else { /* Error detected, but image opened. Close and delete image. */ int rc2; rc2 = pDisk->Backend->pfnClose(pImage->pvBackendData, true); AssertRC(rc2); pImage->pvBackendData = NULL; } } if (VBOX_FAILURE(rc)) { if (pImage) { if (pImage->pszFilename) RTStrFree(pImage->pszFilename); RTMemFree(pImage); } } LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc)); return rc; } /** * Creates and opens a new differencing image file in HDD container. * See comments for VDOpen function about differencing images. * * @returns VBox status code. * @param pDisk Pointer to VBox HDD container. * @param pszFilename Name of the differencing image file to create. * @param uImageFlags Flags specifying special image features. * @param pszComment Pointer to image comment. NULL is ok. * @param uOpenFlags Image file open mode, see VD_OPEN_FLAGS_* constants. * @param pfnProgress Progress callback. Optional. NULL if not to be used. * @param pvUser User argument for the progress callback. */ VBOXDDU_DECL(int) VDCreateDiff(PVBOXHDD pDisk, const char *pszFilename, unsigned uImageFlags, const char *pszComment, unsigned uOpenFlags, PFNVMPROGRESS pfnProgress, void *pvUser) { return VERR_NOT_IMPLEMENTED; } /** * Merges two images having a parent/child relationship (both directions). * As a side effect the source image is deleted from both the disk and * the images in the VBox HDD container. * * @returns VBox status code. * @param pDisk Pointer to VBox HDD container. * @param nImageFrom Name of the image file to merge from. * @param nImageTo Name of the image file to merge to. * @param pfnProgress Progress callback. Optional. NULL if not to be used. * @param pvUser User argument for the progress callback. */ VBOXDDU_DECL(int) VDMerge(PVBOXHDD pDisk, unsigned nImageFrom, unsigned nImageTo, PFNVMPROGRESS pfnProgress, void *pvUser) { return VERR_NOT_IMPLEMENTED; } /** * Copies an image from one VBox HDD container to another. * The copy is opened in the target VBox HDD container. * It is possible to convert between different image formats, because the * backend for the destination VBox HDD container may be different from the * source container. * If both the source and destination reference the same VBox HDD container, * then the image is moved (by copying/deleting) to the new location. * The source container is unchanged if the move operation fails, otherwise * the image at the new location is opened in the same way as the old one was. * * @returns VBox status code. * @param pDiskFrom Pointer to source VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param pDiskTo Pointer to destination VBox HDD container. * @param pfnProgress Progress callback. Optional. NULL if not to be used. * @param pvUser User argument for the progress callback. */ VBOXDDU_DECL(int) VDCopy(PVBOXHDD pDiskFrom, unsigned nImage, PVBOXHDD pDiskTo, PFNVMPROGRESS pfnProgress, void *pvUser) { return VERR_NOT_IMPLEMENTED; } /** * Compacts a growing image file by removing zeroed data blocks. * Optionally defragments data in the image so that ascending sector numbers * are stored in ascending location in the image file. * * @todo maybe include this function in VDCopy. * * @returns VBox status code. * @returns VERR_VDI_NOT_OPENED if no image is opened in HDD container. * @param pDisk Pointer to VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param fDefragment If true, reorder file data so that sectors are stored in ascending order. * @param pfnProgress Progress callback. Optional. NULL if not to be used. * @param pvUser User argument for the progress callback. */ VBOXDDU_DECL(int) VDCompact(PVBOXHDD pDisk, unsigned nImage, bool fDefragment, PFNVMPROGRESS pfnProgress, void *pvUser) { return VERR_NOT_IMPLEMENTED; } /** * Resizes an image. Allows setting the disk size to both larger and smaller * values than the current disk size. * * @returns VBox status code. * @returns VERR_VDI_NOT_OPENED if no image is opened in HDD container. * @param pDisk Pointer to VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param cbSize New image size in bytes. * @param pfnProgress Progress callback. Optional. NULL if not to be used. * @param pvUser User argument for the progress callback. */ VBOXDDU_DECL(int) VDResize(PVBOXHDD pDisk, unsigned nImage, uint64_t cbSize, PFNVMPROGRESS pfnProgress, void *pvUser) { return VERR_NOT_IMPLEMENTED; } /** * Closes the last opened image file in the HDD container. Leaves all changes inside it. * If previous image file was opened in read-only mode (that is normal) and closing image * was opened in read-write mode (the whole disk was in read-write mode) - the previous image * will be reopened in read/write mode. * * @param pDisk Pointer to VBox HDD container. * @param fDelete If true, delete the image from the host disk. */ VBOXDDU_DECL(int) VDClose(PVBOXHDD pDisk, bool fDelete) { LogFlow(("%s: fDelete=%d\n", __FUNCTION__, fDelete)); /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); PVDIMAGE pImage = pDisk->pLast; unsigned uOpenFlags = pDisk->Backend->pfnGetOpenFlags(pImage->pvBackendData); /* Remove image from list of opened images. */ vdRemoveImageFromList(pDisk, pImage); /* Close (and optionally delete) image. */ int rc = pDisk->Backend->pfnClose(pImage->pvBackendData, fDelete); /* Free remaining resources related to the image. */ RTStrFree(pImage->pszFilename); RTMemFree(pImage); /* If disk was previously in read/write mode, make sure it will stay like * this after closing this image. Set the open flags accordingly. */ if (!(uOpenFlags & VD_OPEN_FLAGS_READONLY)) { uOpenFlags = pDisk->Backend->pfnGetOpenFlags(pDisk->pLast->pvBackendData); uOpenFlags &= ~ VD_OPEN_FLAGS_READONLY; rc = pDisk->Backend->pfnSetOpenFlags(pDisk->pLast->pvBackendData, uOpenFlags); } LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc)); return rc; } /** * Closes all opened image files in HDD container. * * @param pDisk Pointer to VDI HDD container. */ VBOXDDU_DECL(int) VDCloseAll(PVBOXHDD pDisk) { LogFlow(("%s:\n", __FUNCTION__)); /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); PVDIMAGE pImage = pDisk->pLast; int rc = VINF_SUCCESS; while (pImage) { PVDIMAGE pPrev = pImage->pPrev; /* Remove image from list of opened images. */ vdRemoveImageFromList(pDisk, pImage); /* Close image. */ int rc2 = pDisk->Backend->pfnClose(pImage->pvBackendData, false); if (VBOX_FAILURE(rc2) && VBOX_SUCCESS(rc)) rc = rc2; /* Free remaining resources related to the image. */ RTStrFree(pImage->pszFilename); RTMemFree(pImage); pImage = pPrev; } Assert(pDisk->pLast == NULL); LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc)); return rc; } /** * Read data from virtual HDD. * * @returns VBox status code. * @param pDisk Pointer to VBox HDD container. * @param uOffset Offset of first reading byte from start of disk. * @param pvBuf Pointer to buffer for reading data. * @param cbRead Number of bytes to read. */ VBOXDDU_DECL(int) VDRead(PVBOXHDD pDisk, uint64_t uOffset, void *pvBuf, size_t cbRead) { /* sanity check */ LogFlow(("%s: offset=%llu cbRead=%u\n", __FUNCTION__, uOffset, (unsigned)cbRead)); Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); int rc = VINF_SUCCESS; PVDIMAGE pImage = pDisk->pLast; if (RT_UNLIKELY(!pImage)) { Assert(pImage); rc = VERR_VDI_NOT_OPENED; goto out; } /* Check params. */ if (uOffset + cbRead > pDisk->cbSize || cbRead == 0) { AssertMsgFailed(("uOffset=%llu cbRead=%u\n", uOffset, cbRead)); return VERR_INVALID_PARAMETER; } rc = vdReadHelper(pDisk, pImage, uOffset, pvBuf, cbRead); out: LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc)); return rc; } /** * Write data to virtual HDD. * * @returns VBox status code. * @param pDisk Pointer to VBox HDD container. * @param uOffset Offset of first reading byte from start of disk. * @param pvBuf Pointer to buffer for writing data. * @param cbWrite Number of bytes to write. */ VBOXDDU_DECL(int) VDWrite(PVBOXHDD pDisk, uint64_t uOffset, const void *pvBuf, size_t cbWrite) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); int rc = VINF_SUCCESS; size_t cbThisWrite; size_t cbPreRead, cbPostRead; PVDIMAGE pImage = pDisk->pLast; if (RT_UNLIKELY(!pImage)) { Assert(pImage); rc = VERR_VDI_NOT_OPENED; goto out; } /* Check params. */ if (uOffset + cbWrite > pDisk->cbSize || cbWrite == 0) { AssertMsgFailed(("uOffset=%llu cbWrite=%u\n", uOffset, cbWrite)); rc = VERR_INVALID_PARAMETER; goto out; } vdSetModifiedFlag(pDisk); /* Loop until all written. */ do { /* Try to write the possibly partial block to the last opened image. * This works when the block is already allocated in this image or * if it is a full-block write, which automatically allocates a new * block if needed. */ cbThisWrite = cbWrite; rc = pDisk->Backend->pfnWrite(pImage->pvBackendData, uOffset, pvBuf, cbThisWrite, &cbThisWrite, &cbPreRead, &cbPostRead); if (rc == VINF_VDI_BLOCK_FREE) { void *pvTmp = RTMemTmpAlloc(cbPreRead + cbThisWrite + cbPostRead); if (!pvBuf) { Assert(!pvBuf); rc = VERR_NO_MEMORY; break; } if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_HONOR_SAME)) { /* Optimized write, suppress writing to a so far unallocated * block when the data is identical than as of the parent. */ rc = vdWriteHelperOptimized(pDisk, pImage, uOffset, cbWrite, cbThisWrite, cbPreRead, cbPostRead, pvBuf, pvTmp); } else { /* Normal write, not optimized in any way. The block will be * written no matter what. This will usually (unless the * backend has some further optimization enabled) cause the * block to be allocated. */ rc = vdWriteHelperStandard(pDisk, pImage, uOffset, cbWrite, cbThisWrite, cbPreRead, cbPostRead, pvBuf, pvTmp); } RTMemTmpFree(pvTmp); if (VBOX_FAILURE(rc)) break; } cbWrite -= cbThisWrite; uOffset += cbThisWrite; pvBuf = (char *)pvBuf + cbThisWrite; } while (cbWrite != 0 && VBOX_SUCCESS(rc)); out: LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc)); return rc; } /** * Make sure the on disk representation of a virtual HDD is up to date. * * @returns VBox status code. * @param pDisk Pointer to VBox HDD container. */ VBOXDDU_DECL(int) VDFlush(PVBOXHDD pDisk) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); int rc = VINF_SUCCESS; PVDIMAGE pImage = pDisk->pLast; if (RT_UNLIKELY(!pImage)) { Assert(pImage); rc = VERR_VDI_NOT_OPENED; } else { vdResetModifiedFlag(pDisk); rc = pDisk->Backend->pfnFlush(pImage->pvBackendData); } LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc)); return rc; } /** * Get number of opened images in HDD container. * * @returns Number of opened images for HDD container. 0 if no images have been opened. * @param pDisk Pointer to VBox HDD container. */ VBOXDDU_DECL(unsigned) VDGetCount(PVBOXHDD pDisk) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); unsigned c = pDisk->cImages; LogFlow(("%s: returns %d\n", __FUNCTION__, c)); return c; } /** * Get read/write mode of the VBox HDD container. * * @returns Virtual disk ReadOnly status. * @returns true if no image is opened in HDD container. * @param pDisk Pointer to VBox HDD container. */ VBOXDDU_DECL(bool) VDIsReadOnly(PVBOXHDD pDisk) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); bool f; if (pDisk->pLast) { unsigned uOpenFlags; uOpenFlags = pDisk->Backend->pfnGetOpenFlags(pDisk->pLast->pvBackendData); f = !!(uOpenFlags & VD_OPEN_FLAGS_READONLY); } else { AssertMsgFailed(("No disk image is opened!\n")); f = true; } LogFlow(("%s: returns %d\n", __FUNCTION__, f)); return f; } /** * Get total disk size of the VBox HDD container. * * @returns Virtual disk size in bytes. * @returns 0 if no image is opened in HDD container. * @param pDisk Pointer to VBox HDD container. */ VBOXDDU_DECL(uint64_t) VDGetSize(PVBOXHDD pDisk) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); uint64_t cb = pDisk->cbSize; LogFlow(("%s: returns %lld\n", __FUNCTION__, cb)); return cb; } /** * Get virtual disk geometry stored in HDD container. * * @returns VBox status code. * @returns VERR_VDI_NOT_OPENED if no image is opened in HDD container. * @returns VERR_VDI_GEOMETRY_NOT_SET if no geometry present in the HDD container. * @param pDisk Pointer to VBox HDD container. * @param pcCylinders Where to store the number of cylinders. NULL is ok. * @param pcHeads Where to store the number of heads. NULL is ok. * @param pcSectors Where to store the number of sectors. NULL is ok. */ VBOXDDU_DECL(int) VDGetGeometry(PVBOXHDD pDisk, unsigned *pcCylinders, unsigned *pcHeads, unsigned *pcSectors) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); int rc = VINF_SUCCESS; PVDIMAGE pImage = pDisk->pBase; if (RT_UNLIKELY(!pImage)) { Assert(pImage); rc = VERR_VDI_NOT_OPENED; } else { if (pDisk->cCylinders != 0) { if (pcCylinders) *pcCylinders = pDisk->cCylinders; if (pcHeads) *pcHeads = pDisk->cHeads; if (pcSectors) *pcSectors = pDisk->cSectors; } else rc = VERR_VDI_GEOMETRY_NOT_SET; } LogFlow(("%s: %Vrc (CHS=%u/%u/%u)\n", __FUNCTION__, rc, pDisk->cCylinders, pDisk->cHeads, pDisk->cSectors)); return rc; } /** * Store virtual disk geometry in HDD container. * * Note that in case of unrecoverable error all images in HDD container will be closed. * * @returns VBox status code. * @returns VERR_VDI_NOT_OPENED if no image is opened in HDD container. * @param pDisk Pointer to VBox HDD container. * @param cCylinders Number of cylinders. * @param cHeads Number of heads. * @param cSectors Number of sectors. */ VBOXDDU_DECL(int) VDSetGeometry(PVBOXHDD pDisk, unsigned cCylinders, unsigned cHeads, unsigned cSectors) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); int rc = VINF_SUCCESS; PVDIMAGE pImage = pDisk->pBase; if (RT_UNLIKELY(!pImage)) { Assert(pImage); rc = VERR_VDI_NOT_OPENED; } else { if ( cCylinders != pDisk->cCylinders || cHeads != pDisk->cHeads || cSectors != pDisk->cSectors) { /* Only update geometry if it is changed. Avoids similar checks * in every backend. Most of the time the new geometry is set to * the previous values, so no need to go through the hassle of * updating an image which could be opened in read-only mode right * now. */ rc = pDisk->Backend->pfnSetGeometry(pImage->pvBackendData, cCylinders, cHeads, cSectors); /* Cache new geometry values in any case, whether successful or not. */ int rc2 = pDisk->Backend->pfnGetGeometry(pImage->pvBackendData, &pDisk->cCylinders, &pDisk->cHeads, &pDisk->cSectors); if (VBOX_FAILURE(rc2)) { pDisk->cCylinders = 0; pDisk->cHeads = 0; pDisk->cSectors = 0; } else { /* Make sure the CHS geometry is properly clipped. */ pDisk->cCylinders = RT_MIN(pDisk->cCylinders, 16383); pDisk->cHeads = RT_MIN(pDisk->cHeads, 255); pDisk->cSectors = RT_MIN(pDisk->cSectors, 255); } } } LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc)); return rc; } /** * Get virtual disk translation mode stored in HDD container. * * @returns VBox status code. * @returns VERR_VDI_NOT_OPENED if no image is opened in HDD container. * @returns VERR_VDI_GEOMETRY_NOT_SET if no geometry present in the HDD container. * @param pDisk Pointer to VBox HDD container. * @param penmTranslation Where to store the translation mode (see pdm.h). */ VBOXDDU_DECL(int) VDGetTranslation(PVBOXHDD pDisk, PPDMBIOSTRANSLATION penmTranslation) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); int rc = VINF_SUCCESS; PVDIMAGE pImage = pDisk->pBase; if (RT_UNLIKELY(!pImage)) { Assert(pImage); rc = VERR_VDI_NOT_OPENED; } else { if (pDisk->enmTranslation != 0) *penmTranslation = pDisk->enmTranslation; else rc = VERR_VDI_GEOMETRY_NOT_SET; } LogFlow(("%s: %Vrc (translation=%u)\n", __FUNCTION__, rc, pDisk->enmTranslation)); return rc; } /** * Store virtual disk translation mode in HDD container. * * Note that in case of unrecoverable error all images in HDD container will be closed. * * @returns VBox status code. * @returns VERR_VDI_NOT_OPENED if no image is opened in HDD container. * @param pDisk Pointer to VBox HDD container. * @param enmTranslation Translation mode (see pdm.h). */ VBOXDDU_DECL(int) VDSetTranslation(PVBOXHDD pDisk, PDMBIOSTRANSLATION enmTranslation) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); int rc = VINF_SUCCESS; PVDIMAGE pImage = pDisk->pBase; if (RT_UNLIKELY(!pImage)) { Assert(pImage); rc = VERR_VDI_NOT_OPENED; } else { if (enmTranslation == 0) rc = VERR_INVALID_PARAMETER; else if (enmTranslation != pDisk->enmTranslation) { /* Only update translation mode if it is changed. Avoids similar * checks in every backend. Most of the time the new translation * mode is set to the previous value, so no need to go through the * hassle of updating an image which could be opened in read-only * mode right now. */ rc = pDisk->Backend->pfnSetTranslation(pImage->pvBackendData, enmTranslation); /* Cache new translation mode in any case, whether successful or not. */ int rc2 = pDisk->Backend->pfnGetTranslation(pImage->pvBackendData, &pDisk->enmTranslation); if (VBOX_FAILURE(rc2)) pDisk->enmTranslation = (PDMBIOSTRANSLATION)0; } } LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc)); return rc; } /** * Get version of image in HDD container. * * @returns VBox status code. * @returns VERR_VDI_IMAGE_NOT_FOUND if image with specified number was not opened. * @param pDisk Pointer to VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param puVersion Where to store the image version. */ VBOXDDU_DECL(int) VDGetVersion(PVBOXHDD pDisk, unsigned nImage, unsigned *puVersion) { return VERR_NOT_IMPLEMENTED; } /** * Get type of image in HDD container. * * @returns VBox status code. * @returns VERR_VDI_IMAGE_NOT_FOUND if image with specified number was not opened. * @param pDisk Pointer to VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param penmType Where to store the image type. */ VBOXDDU_DECL(int) VDGetImageType(PVBOXHDD pDisk, unsigned nImage, PVDIMAGETYPE penmType) { return VERR_NOT_IMPLEMENTED; } /** * Get flags of image in HDD container. * * @returns VBox status code. * @returns VERR_VDI_IMAGE_NOT_FOUND if image with specified number was not opened. * @param pDisk Pointer to VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param puImageFlags Where to store the image flags. */ VBOXDDU_DECL(int) VDGetImageFlags(PVBOXHDD pDisk, unsigned nImage, unsigned *puImageFlags) { return VERR_NOT_IMPLEMENTED; } /** * Get open flags of last opened image in HDD container. * * @returns VBox status code. * @returns VERR_VDI_NOT_OPENED if no image is opened in HDD container. * @param pDisk Pointer to VBox HDD container. * @param puOpenFlags Where to store the image open flags. */ VBOXDDU_DECL(int) VDGetOpenFlags(PVBOXHDD pDisk, unsigned *puOpenFlags) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); unsigned uOpenFlags = 0; int rc = VINF_SUCCESS; PVDIMAGE pImage = pDisk->pLast; if (RT_UNLIKELY(!pImage)) { Assert(pImage); rc = VERR_VDI_NOT_OPENED; } else { uOpenFlags = pDisk->Backend->pfnGetOpenFlags(pDisk->pLast->pvBackendData); *puOpenFlags = uOpenFlags; } LogFlow(("%s: returns %Vrc uOpenFlags=%#x\n", __FUNCTION__, rc, uOpenFlags)); return uOpenFlags; } /** * Set open flags of last opened image in HDD container. * This operation may cause file locking changes and/or files being reopened. * Note that in case of unrecoverable error all images in HDD container will be closed. * * @returns Virtual disk block size in bytes. * @returns VERR_VDI_IMAGE_NOT_FOUND if image with specified number was not opened. * @returns VBox status code. * @param pDisk Pointer to VBox HDD container. * @param uOpenFlags Image file open mode, see VD_OPEN_FLAGS_* constants. */ VBOXDDU_DECL(int) VDSetOpenFlags(PVBOXHDD pDisk, unsigned uOpenFlags) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); int rc = VINF_SUCCESS; PVDIMAGE pImage = pDisk->pLast; if (RT_UNLIKELY(!pImage)) { Assert(pImage); rc = VERR_VDI_NOT_OPENED; } else rc = pDisk->Backend->pfnSetOpenFlags(pDisk->pLast->pvBackendData, uOpenFlags); LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc)); return rc; } /** * Get base filename of image in HDD container. Some image formats use * other filenames as well, so don't use this for anything but for informational * purposes. * * @returns VBox status code. * @returns VERR_VDI_IMAGE_NOT_FOUND if image with specified number was not opened. * @returns VERR_BUFFER_OVERFLOW if pszFilename buffer too small to hold filename. * @param pDisk Pointer to VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param pszFilename Where to store the image file name. * @param cbFilename Size of buffer pszFilename points to. */ VBOXDDU_DECL(int) VDGetFilename(PVBOXHDD pDisk, unsigned nImage, char *pszFilename, unsigned cbFilename) { return VERR_NOT_IMPLEMENTED; } /** * Get the comment line of image in HDD container. * * @returns VBox status code. * @returns VERR_VDI_IMAGE_NOT_FOUND if image with specified number was not opened. * @returns VERR_BUFFER_OVERFLOW if pszComment buffer too small to hold comment text. * @param pDisk Pointer to VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param pszComment Where to store the comment string of image. NULL is ok. * @param cbComment The size of pszComment buffer. 0 is ok. */ VBOXDDU_DECL(int) VDGetComment(PVBOXHDD pDisk, unsigned nImage, char *pszComment, unsigned cbComment) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); Assert(pszComment); PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage); int rc; if (pImage) rc = pDisk->Backend->pfnGetComment(pImage->pvBackendData, pszComment, cbComment); else rc = VERR_VDI_IMAGE_NOT_FOUND; LogFlow(("%s: returns %Vrc, comment='%s' nImage=%u\n", __FUNCTION__, rc, pszComment, nImage)); return rc; } /** * Changes the comment line of image in HDD container. * * @returns VBox status code. * @returns VERR_VDI_IMAGE_NOT_FOUND if image with specified number was not opened. * @param pDisk Pointer to VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param pszComment New comment string (UTF-8). NULL is allowed to reset the comment. */ VBOXDDU_DECL(int) VDSetComment(PVBOXHDD pDisk, unsigned nImage, const char *pszComment) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); LogFlow(("%s: comment='%s' nImage=%u\n", __FUNCTION__, pszComment, nImage)); PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage); int rc; if (pImage) rc = pDisk->Backend->pfnSetComment(pImage->pvBackendData, pszComment); else rc = VERR_VDI_IMAGE_NOT_FOUND; LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc)); return rc; } /** * Get UUID of image in HDD container. * * @returns VBox status code. * @returns VERR_VDI_IMAGE_NOT_FOUND if image with specified number was not opened. * @param pDisk Pointer to VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param pUuid Where to store the image creation UUID. */ VBOXDDU_DECL(int) VDGetUuid(PVBOXHDD pDisk, unsigned nImage, PRTUUID pUuid) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); Assert(pUuid); PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage); int rc; if (pImage) rc = pDisk->Backend->pfnGetUuid(pImage->pvBackendData, pUuid); else rc = VERR_VDI_IMAGE_NOT_FOUND; LogFlow(("%s: returns %Vrc, uuid={%Vuuid} nImage=%u\n", __FUNCTION__, rc, pUuid, nImage)); return rc; } /** * Set the image's UUID. Should not be used by normal applications. * * @returns VBox status code. * @returns VERR_VDI_IMAGE_NOT_FOUND if image with specified number was not opened. * @param pDisk Pointer to VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param pUuid Optional parameter, new UUID of the image. */ VBOXDDU_DECL(int) VDSetUuid(PVBOXHDD pDisk, unsigned nImage, PCRTUUID pUuid) { LogFlow(("%s: uuid={%Vuuid} nImage=%u\n", __FUNCTION__, pUuid, nImage)); /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); Assert(pUuid); PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage); int rc; if (pImage) rc = pDisk->Backend->pfnSetUuid(pImage->pvBackendData, pUuid); else rc = VERR_VDI_IMAGE_NOT_FOUND; LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc)); return rc; } /** * Get last modification UUID of image in HDD container. * * @returns VBox status code. * @returns VERR_VDI_IMAGE_NOT_FOUND if image with specified number was not opened. * @param pDisk Pointer to VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param pUuid Where to store the image modification UUID. */ VBOXDDU_DECL(int) VDGetModificationUuid(PVBOXHDD pDisk, unsigned nImage, PRTUUID pUuid) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); Assert(pUuid); PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage); int rc; if (pImage) rc = pDisk->Backend->pfnGetModificationUuid(pImage->pvBackendData, pUuid); else rc = VERR_VDI_IMAGE_NOT_FOUND; LogFlow(("%s: returns %Vrc, uuid={%Vuuid} nImage=%u\n", __FUNCTION__, rc, pUuid, nImage)); return rc; } /** * Set the image's last modification UUID. Should not be used by normal applications. * * @returns VBox status code. * @returns VERR_VDI_IMAGE_NOT_FOUND if image with specified number was not opened. * @param pDisk Pointer to VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param pUuid Optional parameter, new last modification UUID of the image. */ VBOXDDU_DECL(int) VDSetModificationUuid(PVBOXHDD pDisk, unsigned nImage, PCRTUUID pUuid) { LogFlow(("%s: uuid={%Vuuid} nImage=%u\n", __FUNCTION__, pUuid, nImage)); /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); Assert(pUuid); PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage); int rc; if (pImage) rc = pDisk->Backend->pfnSetModificationUuid(pImage->pvBackendData, pUuid); else rc = VERR_VDI_IMAGE_NOT_FOUND; LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc)); return rc; } /** * Get parent UUID of image in HDD container. * * @returns VBox status code. * @returns VERR_VDI_IMAGE_NOT_FOUND if image with specified number was not opened. * @param pDisk Pointer to VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param pUuid Where to store the parent image UUID. */ VBOXDDU_DECL(int) VDGetParentUuid(PVBOXHDD pDisk, unsigned nImage, PRTUUID pUuid) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); Assert(pUuid); PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage); int rc; if (pImage) rc = pDisk->Backend->pfnGetParentUuid(pImage->pvBackendData, pUuid); else rc = VERR_VDI_IMAGE_NOT_FOUND; LogFlow(("%s: returns %Vrc, uuid={%Vuuid} nImage=%u\n", __FUNCTION__, rc, pUuid, nImage)); return rc; } /** * Set the image's parent UUID. Should not be used by normal applications. * * @returns VBox status code. * @param pDisk Pointer to VBox HDD container. * @param nImage Image number, counts from 0. 0 is always base image of container. * @param pUuid Optional parameter, new parent UUID of the image. */ VBOXDDU_DECL(int) VDSetParentUuid(PVBOXHDD pDisk, unsigned nImage, PCRTUUID pUuid) { LogFlow(("%s: uuid={%Vuuid} nImage=%u\n", __FUNCTION__, pUuid, nImage)); /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); Assert(pUuid); PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage); int rc; if (pImage) rc = pDisk->Backend->pfnSetParentUuid(pImage->pvBackendData, pUuid); else rc = VERR_VDI_IMAGE_NOT_FOUND; LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc)); return rc; } /** * Debug helper - dumps all opened images in HDD container into the log file. * * @param pDisk Pointer to VDI HDD container. */ VBOXDDU_DECL(void) VDDumpImages(PVBOXHDD pDisk) { /* sanity check */ Assert(pDisk); AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature)); RTLogPrintf("--- Dumping VDI Disk, Images=%u\n", pDisk->cImages); for (PVDIMAGE pImage = pDisk->pBase; pImage; pImage = pImage->pNext) { RTLogPrintf("Dumping VDI image \"%s\" file=%#p\n", pImage->pszFilename); /** @todo call backend to print its part. */ } }