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Diffstat (limited to 'include/iprt/dvm.h')
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diff --git a/include/iprt/dvm.h b/include/iprt/dvm.h new file mode 100644 index 00000000..25f12526 --- /dev/null +++ b/include/iprt/dvm.h @@ -0,0 +1,639 @@ +/** @file + * IPRT Disk Volume Management API (DVM). + */ + +/* + * 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 IPRT_INCLUDED_dvm_h +#define IPRT_INCLUDED_dvm_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <iprt/types.h> + +RT_C_DECLS_BEGIN + + +/** @defgroup grp_dvm IPRT Disk Volume Management + * @{ + */ + +/** + * Volume type. + * Comparable to the FS type in MBR partition maps + * or the partition type GUIDs in GPT tables. + */ +typedef enum RTDVMVOLTYPE +{ + /** Invalid. */ + RTDVMVOLTYPE_INVALID = 0, + /** Unknown. */ + RTDVMVOLTYPE_UNKNOWN, + /** Volume hosts a NTFS filesystem. */ + RTDVMVOLTYPE_NTFS, + /** Volume hosts a FAT12 filesystem. */ + RTDVMVOLTYPE_FAT12, + /** Volume hosts a FAT16 filesystem. */ + RTDVMVOLTYPE_FAT16, + /** Volume hosts a FAT32 filesystem. */ + RTDVMVOLTYPE_FAT32, + + /** EFI system partition (c12a7328-f81f-11d2-ba4b-00a0c93ec93b). */ + RTDVMVOLTYPE_EFI_SYSTEM, + + /** Volume hosts a Mac OS X HFS or HFS+ filesystem. */ + RTDVMVOLTYPE_DARWIN_HFS, + /** Volume hosts a Mac OS X APFS filesystem. */ + RTDVMVOLTYPE_DARWIN_APFS, + + /** Volume hosts a Linux swap. */ + RTDVMVOLTYPE_LINUX_SWAP, + /** Volume hosts a Linux filesystem. */ + RTDVMVOLTYPE_LINUX_NATIVE, + /** Volume hosts a Linux LVM. */ + RTDVMVOLTYPE_LINUX_LVM, + /** Volume hosts a Linux SoftRaid. */ + RTDVMVOLTYPE_LINUX_SOFTRAID, + + /** Volume hosts a FreeBSD disklabel. */ + RTDVMVOLTYPE_FREEBSD, + /** Volume hosts a NetBSD disklabel. */ + RTDVMVOLTYPE_NETBSD, + /** Volume hosts a OpenBSD disklabel. */ + RTDVMVOLTYPE_OPENBSD, + /** Volume hosts a Solaris volume. */ + RTDVMVOLTYPE_SOLARIS, + + /** Volume hosts a Windows basic data partition . */ + RTDVMVOLTYPE_WIN_BASIC, + /** Volume hosts a Microsoft reserved partition (MSR). */ + RTDVMVOLTYPE_WIN_MSR, + /** Volume hosts a Windows logical disk manager (LDM) metadata partition. */ + RTDVMVOLTYPE_WIN_LDM_META, + /** Volume hosts a Windows logical disk manager (LDM) data partition. */ + RTDVMVOLTYPE_WIN_LDM_DATA, + /** Volume hosts a Windows recovery partition. */ + RTDVMVOLTYPE_WIN_RECOVERY, + /** Volume hosts a storage spaces partition. */ + RTDVMVOLTYPE_WIN_STORAGE_SPACES, + + /** Volume hosts an IBM general parallel file system (GPFS). */ + RTDVMVOLTYPE_IBM_GPFS, + + /** OS/2 (Arca Noae) type 1 partition. */ + RTDVMVOLTYPE_ARCA_OS2, + + /** End of the valid values. */ + RTDVMVOLTYPE_END, + /** Usual 32bit hack. */ + RTDVMVOLTYPE_32BIT_HACK = 0x7fffffff +} RTDVMVOLTYPE; + +/** @defgroup grp_dvm_flags Flags used by RTDvmCreate. + * @{ */ +/** DVM flags - Blocks are always marked as unused if the volume has + * no block status callback set. + * The default is to mark them as used. */ +#define DVM_FLAGS_NO_STATUS_CALLBACK_MARK_AS_UNUSED RT_BIT_32(0) +/** DVM flags - Space which is unused in the map will be marked as used + * when calling RTDvmMapQueryBlockStatus(). */ +#define DVM_FLAGS_UNUSED_SPACE_MARK_AS_USED RT_BIT_32(1) +/** Mask of all valid flags. */ +#define DVM_FLAGS_VALID_MASK UINT32_C(0x00000003) +/** @} */ + + +/** @defgroup grp_dvm_vol_flags Volume flags used by RTDvmVolumeGetFlags(). + * @{ */ +/** Volume flags - Volume is bootable. */ +#define DVMVOLUME_FLAGS_BOOTABLE RT_BIT_64(0) +/** Volume flags - Volume is active. */ +#define DVMVOLUME_FLAGS_ACTIVE RT_BIT_64(1) +/** Volume is contiguous on the underlying medium and RTDvmVolumeQueryRange(). */ +#define DVMVOLUME_F_CONTIGUOUS RT_BIT_64(2) +/** @} */ + +/** A handle to a volume manager. */ +typedef struct RTDVMINTERNAL *RTDVM; +/** A pointer to a volume manager handle. */ +typedef RTDVM *PRTDVM; +/** NIL volume manager handle. */ +#define NIL_RTDVM ((RTDVM)~0) + +/** A handle to a volume in a volume map. */ +typedef struct RTDVMVOLUMEINTERNAL *RTDVMVOLUME; +/** A pointer to a volume handle. */ +typedef RTDVMVOLUME *PRTDVMVOLUME; +/** NIL volume handle. */ +#define NIL_RTDVMVOLUME ((RTDVMVOLUME)~0) + +/** + * Callback for querying the block allocation status of a volume. + * + * @returns IPRT status code. + * @param pvUser Opaque user data passed when setting the callback. + * @param off Offset relative to the start of the volume. + * @param cb Range to check in bytes. + * @param pfAllocated Where to store the allocation status on success. + */ +typedef DECLCALLBACKTYPE(int, FNDVMVOLUMEQUERYBLOCKSTATUS,(void *pvUser, uint64_t off, uint64_t cb, bool *pfAllocated)); +/** Pointer to a query block allocation status callback. */ +typedef FNDVMVOLUMEQUERYBLOCKSTATUS *PFNDVMVOLUMEQUERYBLOCKSTATUS; + +/** + * Create a new volume manager. + * + * @returns IPRT status. + * @param phVolMgr Where to store the handle to the volume manager on + * success. + * @param hVfsFile The disk/container/whatever. + * @param cbSector Size of one sector in bytes. + * @param fFlags Combination of RTDVM_FLAGS_* + */ +RTDECL(int) RTDvmCreate(PRTDVM phVolMgr, RTVFSFILE hVfsFile, uint32_t cbSector, uint32_t fFlags); + +/** + * Retain a given volume manager. + * + * @returns New reference count on success, UINT32_MAX on failure. + * @param hVolMgr The volume manager to retain. + */ +RTDECL(uint32_t) RTDvmRetain(RTDVM hVolMgr); + +/** + * Releases a given volume manager. + * + * @returns New reference count on success (0 if closed), UINT32_MAX on failure. + * @param hVolMgr The volume manager to release. + */ +RTDECL(uint32_t) RTDvmRelease(RTDVM hVolMgr); + +/** + * Probes the underyling disk for the best volume manager format handler + * and opens it. + * + * @returns IPRT status code. + * @retval VERR_NOT_FOUND if no backend can handle the volume map on the disk. + * @param hVolMgr The volume manager handle. + */ +RTDECL(int) RTDvmMapOpen(RTDVM hVolMgr); + +/** + * Initializes a new volume map using the given format handler. + * + * @returns IPRT status code. + * @param hVolMgr The volume manager handle. + * @param pszFmt The format to use for the new map. + */ +RTDECL(int) RTDvmMapInitialize(RTDVM hVolMgr, const char *pszFmt); + +/** + * Gets the name of the currently used format of the disk map. + * + * @returns Name of the format. + * @param hVolMgr The volume manager handle. + */ +RTDECL(const char *) RTDvmMapGetFormatName(RTDVM hVolMgr); + +/** + * DVM format types. + */ +typedef enum RTDVMFORMATTYPE +{ + /** Invalid zero value. */ + RTDVMFORMATTYPE_INVALID = 0, + /** Master boot record. */ + RTDVMFORMATTYPE_MBR, + /** GUID partition table. */ + RTDVMFORMATTYPE_GPT, + /** BSD labels. */ + RTDVMFORMATTYPE_BSD_LABEL, + /** End of valid values. */ + RTDVMFORMATTYPE_END, + /** 32-bit type size hack. */ + RTDVMFORMATTYPE_32BIT_HACK = 0x7fffffff +} RTDVMFORMATTYPE; + +/** + * Gets the format type of the current disk map. + * + * @returns Format type. RTDVMFORMATTYPE_INVALID on invalid input. + * @param hVolMgr The volume manager handle. + */ +RTDECL(RTDVMFORMATTYPE) RTDvmMapGetFormatType(RTDVM hVolMgr); + +/** + * Gets the UUID of the disk if applicable. + * + * Disks using the MBR format may return the 32-bit disk identity in the + * u32TimeLow field and set the rest to zero. + * + * @returns IPRT status code. + * @retval VERR_NOT_SUPPORTED if the partition scheme doesn't do UUIDs. + * @retval VINF_NOT_SUPPORTED if non-UUID disk ID is returned. + * @param hVolMgr The volume manager handle. + * @param pUuid Where to return the UUID. + * + * @todo It's quite possible this should be turned into a map-level edition of + * RTDvmVolumeQueryProp... + */ +RTDECL(int) RTDvmMapQueryDiskUuid(RTDVM hVolMgr, PRTUUID pUuid); + +/** + * Gets the number of valid partitions in the map. + * + * @returns The number of valid volumes in the map or UINT32_MAX on failure. + * @param hVolMgr The volume manager handle. + */ +RTDECL(uint32_t) RTDvmMapGetValidVolumes(RTDVM hVolMgr); + +/** + * Gets the maximum number of partitions the map can hold. + * + * @returns The maximum number of volumes in the map or UINT32_MAX on failure. + * @param hVolMgr The volume manager handle. + */ +RTDECL(uint32_t) RTDvmMapGetMaxVolumes(RTDVM hVolMgr); + +/** + * Get the first valid volume from a map. + * + * @returns IPRT status code. + * @param hVolMgr The volume manager handle. + * @param phVol Where to store the handle to the first volume on + * success. Release with RTDvmVolumeRelease(). + */ +RTDECL(int) RTDvmMapQueryFirstVolume(RTDVM hVolMgr, PRTDVMVOLUME phVol); + +/** + * Get the first valid volume from a map. + * + * @returns IPRT status code. + * @param hVolMgr The volume manager handle. + * @param hVol Handle of the current volume. + * @param phVolNext Where to store the handle to the next volume on + * success. Release with RTDvmVolumeRelease(). + */ +RTDECL(int) RTDvmMapQueryNextVolume(RTDVM hVolMgr, RTDVMVOLUME hVol, PRTDVMVOLUME phVolNext); + +/** + * Returns whether the given block on the disk is in use. + * + * @returns IPRT status code. + * @param hVolMgr The volume manager handle. + * @param off The start offset to check for. + * @param cb The range in bytes to check. + * @param pfAllocated Where to store the in-use status on success. + * + * @remark This method will return true even if a part of the range is not in use. + */ +RTDECL(int) RTDvmMapQueryBlockStatus(RTDVM hVolMgr, uint64_t off, uint64_t cb, bool *pfAllocated); + +/** + * Partition/map table location information. + * @sa RTDvmMapQueryTableLocations + */ +typedef struct RTDVMTABLELOCATION +{ + /** The byte offset on the underlying media. */ + uint64_t off; + /** The table size in bytes. */ + uint64_t cb; + /** Number of padding bytes / free space between the actual table and + * first partition. */ + uint64_t cbPadding; +} RTDVMTABLELOCATION; +/** Pointer to partition table location info. */ +typedef RTDVMTABLELOCATION *PRTDVMTABLELOCATION; +/** Pointer to const partition table location info. */ +typedef RTDVMTABLELOCATION const *PCRTDVMTABLELOCATION; + + +/** @name RTDVMMAPQTABLOC_F_XXX - Flags for RTDvmMapQueryTableLocations + * @{ */ +/** Make sure GPT includes the protective MBR. */ +#define RTDVMMAPQTABLOC_F_INCLUDE_LEGACY RT_BIT_32(0) +/** Valid flags. */ +#define RTDVMMAPQTABLOC_F_VALID_MASK UINT32_C(1) +/** @} */ + +/** + * Query the partition table locations. + * + * @returns IPRT status code. + * @retval VERR_BUFFER_OVERFLOW if the table is too small, @a *pcActual will be + * set to the required size. + * @retval VERR_BUFFER_UNDERFLOW if the table is too big and @a pcActual is + * NULL. + * @param hVolMgr The volume manager handle. + * @param fFlags Flags, see RTDVMMAPQTABLOC_F_XXX. + * @param paLocations Where to return the info. This can be NULL if @a + * cLocations is zero and @a pcActual is given. + * @param cLocations The size of @a paLocations in items. + * @param pcActual Where to return the actual number of locations, or + * on VERR_BUFFER_OVERFLOW the necessary table size. + * Optional, when not specified the cLocations value + * must match exactly or it fails with + * VERR_BUFFER_UNDERFLOW. + */ +RTDECL(int) RTDvmMapQueryTableLocations(RTDVM hVolMgr, uint32_t fFlags, + PRTDVMTABLELOCATION paLocations, size_t cLocations, size_t *pcActual); + +/** + * Retains a valid volume handle. + * + * @returns New reference count on success, UINT32_MAX on failure. + * @param hVol The volume to retain. + */ +RTDECL(uint32_t) RTDvmVolumeRetain(RTDVMVOLUME hVol); + +/** + * Releases a valid volume handle. + * + * @returns New reference count on success (0 if closed), UINT32_MAX on failure. + * @param hVol The volume to release. + */ +RTDECL(uint32_t) RTDvmVolumeRelease(RTDVMVOLUME hVol); + +/** + * Sets the callback to query the block allocation status for a volume. + * This overwrites any other callback set previously. + * + * @returns nothing. + * @param hVol The volume handle. + * @param pfnQueryBlockStatus The callback to set. Can be NULL to disable + * a previous callback. + * @param pvUser Opaque user data passed in the callback. + */ +RTDECL(void) RTDvmVolumeSetQueryBlockStatusCallback(RTDVMVOLUME hVol, + PFNDVMVOLUMEQUERYBLOCKSTATUS pfnQueryBlockStatus, + void *pvUser); + +/** + * Get the size of a volume in bytes. + * + * @returns Size of the volume in bytes or 0 on failure. + * @param hVol The volume handle. + */ +RTDECL(uint64_t) RTDvmVolumeGetSize(RTDVMVOLUME hVol); + +/** + * Gets the name of the volume if supported. + * + * @returns IPRT status code. + * @param hVol The volume handle. + * @param ppszVolName Where to store the name of the volume on success. + * The string must be freed with RTStrFree(). + */ +RTDECL(int) RTDvmVolumeQueryName(RTDVMVOLUME hVol, char **ppszVolName); + +/** + * Get the volume type of the volume if supported. + * + * @returns The volume type on success, DVMVOLTYPE_INVALID if hVol is invalid. + * @param hVol The volume handle. + */ +RTDECL(RTDVMVOLTYPE) RTDvmVolumeGetType(RTDVMVOLUME hVol); + +/** + * Get the volume flags of the volume if supported. + * + * @returns The volume flags or UINT64_MAX on failure. + * @param hVol The volume handle. + */ +RTDECL(uint64_t) RTDvmVolumeGetFlags(RTDVMVOLUME hVol); + +/** + * Queries the range of the given volume on the underlying medium. + * + * @returns IPRT status code. + * @retval VERR_NOT_SUPPORTED if the DVMVOLUME_F_CONTIGUOUS flag is not returned by RTDvmVolumeGetFlags(). + * @param hVol The volume handle. + * @param poffStart Where to store the start offset in bytes on the underlying medium. + * @param poffLast Where to store the last offset in bytes on the underlying medium (inclusive). + */ +RTDECL(int) RTDvmVolumeQueryRange(RTDVMVOLUME hVol, uint64_t *poffStart, uint64_t *poffLast); + +/** + * Returns the partition/whatever table location of the volume. + * + * For volume format with a single table, like GPT and BSD-labels, it will + * return the location of that table. Though for GPT, the fake MBR will not be + * included. + * + * For logical (extended) MBR-style volumes, this will return the location of + * the extended partition table. For primary volumes the MBR location is + * returned. The special MBR case is why this operation is done on the volume + * rather than the volume manager. + * + * Using RTDvmVolumeGetIndex with RTDVMVOLIDX_IN_PART_TABLE should get you + * the index in the table returned by this function. + * + * @returns IPRT status code. + * @param hVol The volume handle. + * @param poffTable Where to return the byte offset on the underlying + * media of the (partition/volume/whatever) table. + * @param pcbTable Where to return the table size in bytes. (This does + * not include any alignment padding or such, just + * padding up to sector/block size.) + */ +RTDECL(int) RTDvmVolumeQueryTableLocation(RTDVMVOLUME hVol, uint64_t *poffTable, uint64_t *pcbTable); + +/** + * RTDvmVolumeGetIndex indexes. + */ +typedef enum RTDVMVOLIDX +{ + /** Invalid zero value. */ + RTDVMVOLIDX_INVALID = 0, + /** Index matching the host's volume numbering. + * This is a pseudo index, that gets translated to one of the others depending + * on which host we're running on. */ + RTDVMVOLIDX_HOST, + /** Only consider user visible ones, i.e. don't count MBR extended partition + * entries and such like. */ + RTDVMVOLIDX_USER_VISIBLE, + /** Index when all volumes, user visible, hidden, special, whatever ones are + * included. + * + * For MBR this is 1-based index where all primary entires are included whether + * in use or not. Only non-empty entries in extended tables are counted, though + * the forward link is included. */ + RTDVMVOLIDX_ALL, + /** The raw index within the partition/volume/whatever table. This have a kind + * of special meaning to MBR, where there are multiple tables. */ + RTDVMVOLIDX_IN_TABLE, + /** Follows the linux /dev/sdaX convention as closely as absolutely possible. */ + RTDVMVOLIDX_LINUX, + /** End of valid indexes. */ + RTDVMVOLIDX_END, + /** Make sure the type is 32-bit. */ + RTDVMVOLIDX_32BIT_HACK = 0x7fffffff +} RTDVMVOLIDX; + +/** + * Gets the tiven index for the specified volume. + * + * @returns The requested index, UINT32_MAX on failure. + * @param hVol The volume handle. + * @param enmIndex Which kind of index to get for the volume. + */ +RTDECL(uint32_t) RTDvmVolumeGetIndex(RTDVMVOLUME hVol, RTDVMVOLIDX enmIndex); + +/** + * Volume properties queriable via RTDvmVolumeQueryProp. + * + * @note Integer values can typically be queried in multiple sizes. This is + * handled by the frontend code. The format specific backends only + * have to handle the smallest allowed size. + */ +typedef enum RTDVMVOLPROP +{ + /** Customary invalid zero value. */ + RTDVMVOLPROP_INVALID = 0, + /** unsigned[16,32,64]: MBR first cylinder (0-based, CHS). */ + RTDVMVOLPROP_MBR_FIRST_CYLINDER, + /** unsigned[8,16,32,64]: MBR first head (0-based, CHS). */ + RTDVMVOLPROP_MBR_FIRST_HEAD, + /** unsigned[8,16,32,64]: MBR first sector (1-based, CHS). */ + RTDVMVOLPROP_MBR_FIRST_SECTOR, + /** unsigned[16,32,64]: MBR last cylinder (0-based, CHS). */ + RTDVMVOLPROP_MBR_LAST_CYLINDER, + /** unsigned[8,16,32,64]: MBR last head (0-based, CHS). */ + RTDVMVOLPROP_MBR_LAST_HEAD, + /** unsigned[8,16,32,64]: MBR last sector (1-based, CHS). */ + RTDVMVOLPROP_MBR_LAST_SECTOR, + /** unsigned[8,16,32,64]: MBR partition type. */ + RTDVMVOLPROP_MBR_TYPE, + /** RTUUID: GPT volume type. */ + RTDVMVOLPROP_GPT_TYPE, + /** RTUUID: GPT volume UUID. */ + RTDVMVOLPROP_GPT_UUID, + /** End of valid values. */ + RTDVMVOLPROP_END, + /** Make sure the type is 32-bit. */ + RTDVMVOLPROP_32BIT_HACK = 0x7fffffff +} RTDVMVOLPROP; + +/** + * Query a generic volume property. + * + * This is an extensible interface for retrieving mostly format specific + * information, or information that's not commonly used. (It's modeled after + * RTLdrQueryPropEx.) + * + * @returns IPRT status code. + * @retval VERR_NOT_SUPPORTED if the property query isn't supported (either all + * or that specific property). The caller must handle this result. + * @retval VERR_NOT_FOUND is currently not returned, but intended for cases + * where it wasn't present in the tables. + * @retval VERR_INVALID_FUNCTION if the @a enmProperty value is wrong. + * @retval VERR_INVALID_PARAMETER if the fixed buffer size is wrong. Correct + * size in @a *pcbBuf. + * @retval VERR_BUFFER_OVERFLOW if the property doesn't have a fixed size + * buffer and the buffer isn't big enough. Correct size in @a *pcbBuf. + * @retval VERR_INVALID_HANDLE if the handle is invalid. + * @param hVol Handle to the volume. + * @param enmProperty The property to query. + * @param pvBuf Pointer to the input / output buffer. In most cases + * it's only used for returning data. + * @param cbBuf The size of the buffer. + * @param pcbBuf Where to return the amount of data returned. On + * buffer size errors, this is set to the correct size. + * Optional. + * @sa RTDvmVolumeGetPropU64 + */ +RTDECL(int) RTDvmVolumeQueryProp(RTDVMVOLUME hVol, RTDVMVOLPROP enmProperty, void *pvBuf, size_t cbBuf, size_t *pcbBuf); + +/** + * Wrapper around RTDvmVolumeQueryProp for simplifying getting unimportant + * integer properties. + * + * @returns The property value if supported and found, the default value if not. + * Errors other than VERR_NOT_SUPPORTED and VERR_NOT_FOUND are + * asserted. + * @param hVol Handle to the volume. + * @param enmProperty The property to query. + * @param uDefault The value to return on error. + * @sa RTDvmVolumeQueryProp + */ +RTDECL(uint64_t) RTDvmVolumeGetPropU64(RTDVMVOLUME hVol, RTDVMVOLPROP enmProperty, uint64_t uDefault); + +/** + * Reads data from the given volume. + * + * @returns IPRT status code. + * @param hVol The volume handle. + * @param off Where to start reading from - 0 is the beginning of + * the volume. + * @param pvBuf Where to store the read data. + * @param cbRead How many bytes to read. + */ +RTDECL(int) RTDvmVolumeRead(RTDVMVOLUME hVol, uint64_t off, void *pvBuf, size_t cbRead); + +/** + * Writes data to the given volume. + * + * @returns IPRT status code. + * @param hVol The volume handle. + * @param off Where to start writing to - 0 is the beginning of + * the volume. + * @param pvBuf The data to write. + * @param cbWrite How many bytes to write. + */ +RTDECL(int) RTDvmVolumeWrite(RTDVMVOLUME hVol, uint64_t off, const void *pvBuf, size_t cbWrite); + +/** + * Returns the description of a given volume type. + * + * @returns The description of the type. + * @param enmVolType The volume type. + */ +RTDECL(const char *) RTDvmVolumeTypeGetDescr(RTDVMVOLTYPE enmVolType); + +/** + * Creates an VFS file from a volume handle. + * + * @returns IPRT status code. + * @param hVol The volume handle. + * @param fOpen RTFILE_O_XXX. + * @param phVfsFileOut Where to store the VFS file handle on success. + */ +RTDECL(int) RTDvmVolumeCreateVfsFile(RTDVMVOLUME hVol, uint64_t fOpen, PRTVFSFILE phVfsFileOut); + +RT_C_DECLS_END + +/** @} */ + +#endif /* !IPRT_INCLUDED_dvm_h */ + |