diff options
Diffstat (limited to 'src/VBox/Runtime/common/dvm/dvmgpt.cpp')
| -rw-r--r-- | src/VBox/Runtime/common/dvm/dvmgpt.cpp | 582 |
1 files changed, 582 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/dvm/dvmgpt.cpp b/src/VBox/Runtime/common/dvm/dvmgpt.cpp new file mode 100644 index 00000000..19b3d4ac --- /dev/null +++ b/src/VBox/Runtime/common/dvm/dvmgpt.cpp @@ -0,0 +1,582 @@ +/* $Id: dvmgpt.cpp $ */ +/** @file + * IPRT Disk Volume Management API (DVM) - GPT format backend. + */ + +/* + * Copyright (C) 2011-2020 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. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE 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. + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include <iprt/dvm.h> + +#include <iprt/assert.h> +#include <iprt/asm.h> +#include <iprt/mem.h> +#include <iprt/string.h> +#include <iprt/utf16.h> +#include <iprt/uuid.h> +#include "internal/dvm.h" + + +/********************************************************************************************************************************* +* Structures and Typedefs * +*********************************************************************************************************************************/ +/** The GPT signature. */ +#define RTDVM_GPT_SIGNATURE "EFI PART" + +/** + * GPT on disk header. + */ +typedef struct GPTHDR +{ + /** 0x00: Signature ("EFI PART"). */ + char abSignature[8]; + /** 0x08: Revision. */ + uint32_t u32Revision; + /** 0x0c: Header size. */ + uint32_t cbHeader; + /** 0x10: CRC of header. */ + uint32_t u32Crc; +} GPTHDR; +/** Pointer to a GPT header. */ +typedef struct GPTHDR *PGPTHDR; +AssertCompileSize(GPTHDR, 20); + +/** + * Complete GPT table header for revision 1.0. + */ +#pragma pack(1) +typedef struct GPTHDRREV1 +{ + /** 0x00: Header. */ + GPTHDR Hdr; + /** 0x14: Reserved. */ + uint32_t u32Reserved; + /** 0x18: Current LBA. */ + uint64_t u64LbaCurrent; + /** 0x20: Backup LBA. */ + uint64_t u64LbaBackup; + /** 0x28:First usable LBA for partitions. */ + uint64_t u64LbaFirstPartition; + /** 0x30: Last usable LBA for partitions. */ + uint64_t u64LbaLastPartition; + /** 0x38: Disk UUID. */ + RTUUID DiskUuid; + /** 0x48: LBA of first partition entry. */ + uint64_t u64LbaPartitionEntries; + /** 0x50: Number of partition entries. */ + uint32_t cPartitionEntries; + /** 0x54: Partition entry size. */ + uint32_t cbPartitionEntry; + /** 0x58: CRC of partition entries. */ + uint32_t u32CrcPartitionEntries; +} GPTHDRREV1; +/** Pointer to a revision 1.0 GPT header. */ +typedef GPTHDRREV1 *PGPTHDRREV1; +#pragma pack() +AssertCompileSize(GPTHDRREV1, 92); + +/** + * GPT partition table entry. + */ +typedef struct GPTENTRY +{ + /** 0x00: Partition type UUID. */ + RTUUID UuidType; + /** 0x10: Partition UUID. */ + RTUUID UuidPartition; + /** 0x20: First LBA. */ + uint64_t u64LbaFirst; + /** 0x28: Last LBA. */ + uint64_t u64LbaLast; + /** 0x30: Attribute flags. */ + uint64_t u64Flags; + /** 0x38: Partition name (UTF-16LE code units). */ + RTUTF16 aPartitionName[36]; +} GPTENTRY; +/** Pointer to a GPT entry. */ +typedef struct GPTENTRY *PGPTENTRY; +AssertCompileSize(GPTENTRY, 128); + +/** Partition flags - System partition. */ +#define RTDVM_GPT_ENTRY_SYSTEM RT_BIT_64(0) +/** Partition flags - Partition is readonly. */ +#define RTDVM_GPT_ENTRY_READONLY RT_BIT_64(60) +/** Partition flags - Partition is hidden. */ +#define RTDVM_GPT_ENTRY_HIDDEN RT_BIT_64(62) +/** Partition flags - Don't automount this partition. */ +#define RTDVM_GPT_ENTRY_NO_AUTOMOUNT RT_BIT_64(63) + +/** + * GPT volume manager data. + */ +typedef struct RTDVMFMTINTERNAL +{ + /** Pointer to the underlying disk. */ + PCRTDVMDISK pDisk; + /** GPT header. */ + GPTHDRREV1 HdrRev1; + /** GPT array. */ + PGPTENTRY paGptEntries; + /** Number of occupied partition entries. */ + uint32_t cPartitions; +} RTDVMFMTINTERNAL; +/** Pointer to the MBR volume manager. */ +typedef RTDVMFMTINTERNAL *PRTDVMFMTINTERNAL; + +/** + * GPT volume data. + */ +typedef struct RTDVMVOLUMEFMTINTERNAL +{ + /** Pointer to the volume manager. */ + PRTDVMFMTINTERNAL pVolMgr; + /** Partition table entry index. */ + uint32_t idxEntry; + /** Start offset of the volume. */ + uint64_t offStart; + /** Size of the volume. */ + uint64_t cbVolume; + /** Pointer to the GPT entry in the array. */ + PGPTENTRY pGptEntry; +} RTDVMVOLUMEFMTINTERNAL; +/** Pointer to an MBR volume. */ +typedef RTDVMVOLUMEFMTINTERNAL *PRTDVMVOLUMEFMTINTERNAL; + +/** + * GPT partition type to DVM volume type mapping entry. + */ + +typedef struct RTDVMGPTPARTTYPE2VOLTYPE +{ + /** Type UUID. */ + const char *pcszUuid; + /** DVM volume type. */ + RTDVMVOLTYPE enmVolType; +} RTDVMGPTPARTTYPE2VOLTYPE; +/** Pointer to a MBR FS Type to volume type mapping entry. */ +typedef RTDVMGPTPARTTYPE2VOLTYPE *PRTDVMGPTPARTTYPE2VOLTYPE; + +/** Converts a LBA number to the byte offset. */ +#define RTDVM_GPT_LBA2BYTE(lba, disk) ((lba) * (disk)->cbSector) +/** Converts a Byte offset to the LBA number. */ +#define RTDVM_GPT_BYTE2LBA(lba, disk) ((lba) / (disk)->cbSector) + + +/********************************************************************************************************************************* +* Global Variables * +*********************************************************************************************************************************/ +/** + * Mapping of partition types to DVM volume types. + * + * From http://en.wikipedia.org/wiki/GUID_Partition_Table + */ +static const RTDVMGPTPARTTYPE2VOLTYPE g_aPartType2DvmVolTypes[] = +{ + { "C12A7328-F81F-11D2-BA4B-00A0C93EC93B", RTDVMVOLTYPE_EFI_SYSTEM }, + + { "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", RTDVMVOLTYPE_WIN_BASIC }, + { "E3C9E316-0B5C-4DB8-817D-F92DF00215AE", RTDVMVOLTYPE_WIN_MSR }, + { "5808C8AA-7E8F-42E0-85D2-E1E90434CFB3", RTDVMVOLTYPE_WIN_LDM_META }, + { "AF9B60A0-1431-4F62-BC68-3311714A69AD", RTDVMVOLTYPE_WIN_LDM_DATA }, + { "DE94BBA4-06D1-4D40-A16A-BFD50179D6AC", RTDVMVOLTYPE_WIN_RECOVERY }, + { "E75CAF8F-F680-4CEE-AFA3-B001E56EFC2D", RTDVMVOLTYPE_WIN_STORAGE_SPACES }, + + { "0657FD6D-A4AB-43C4-84E5-0933C84B4F4F", RTDVMVOLTYPE_LINUX_SWAP }, + { "0FC63DAF-8483-4772-8E79-3D69D8477DE4", RTDVMVOLTYPE_LINUX_NATIVE }, + { "44479540-F297-41B2-9AF7-D131D5F0458A", RTDVMVOLTYPE_LINUX_NATIVE }, /* x86 root */ + { "4F68BCE3-E8CD-4DB1-96E7-FBCAF984B709", RTDVMVOLTYPE_LINUX_NATIVE }, /* AMD64 root */ + { "69DAD710-2CE4-4E3C-B16C-21A1D49ABED3", RTDVMVOLTYPE_LINUX_NATIVE }, /* ARM32 root */ + { "B921B045-1DF0-41C3-AF44-4C6F280D3FAE", RTDVMVOLTYPE_LINUX_NATIVE }, /* ARM64 root */ + { "E6D6D379-F507-44C2-A23C-238F2A3DF928", RTDVMVOLTYPE_LINUX_LVM }, + { "A19D880F-05FC-4D3B-A006-743F0F84911E", RTDVMVOLTYPE_LINUX_SOFTRAID }, + + { "83BD6B9D-7F41-11DC-BE0B-001560B84F0F", RTDVMVOLTYPE_FREEBSD }, /* Boot */ + { "516E7CB4-6ECF-11D6-8FF8-00022D09712B", RTDVMVOLTYPE_FREEBSD }, /* Data */ + { "516E7CB5-6ECF-11D6-8FF8-00022D09712B", RTDVMVOLTYPE_FREEBSD }, /* Swap */ + { "516E7CB6-6ECF-11D6-8FF8-00022D09712B", RTDVMVOLTYPE_FREEBSD }, /* UFS */ + { "516E7CB8-6ECF-11D6-8FF8-00022D09712B", RTDVMVOLTYPE_FREEBSD }, /* Vinum */ + { "516E7CBA-6ECF-11D6-8FF8-00022D09712B", RTDVMVOLTYPE_FREEBSD }, /* ZFS */ + + { "49F48D32-B10E-11DC-B99B-0019D1879648", RTDVMVOLTYPE_NETBSD }, /* Swap */ + { "49F48D5A-B10E-11DC-B99B-0019D1879648", RTDVMVOLTYPE_NETBSD }, /* FFS */ + { "49F48D82-B10E-11DC-B99B-0019D1879648", RTDVMVOLTYPE_NETBSD }, /* LFS */ + { "49F48DAA-B10E-11DC-B99B-0019D1879648", RTDVMVOLTYPE_NETBSD }, /* Raid */ + { "2DB519C4-B10F-11DC-B99B-0019D1879648", RTDVMVOLTYPE_NETBSD }, /* Concatenated */ + { "2DB519EC-B10F-11DC-B99B-0019D1879648", RTDVMVOLTYPE_NETBSD }, /* Encrypted */ + + { "48465300-0000-11AA-AA11-00306543ECAC", RTDVMVOLTYPE_DARWIN_HFS }, + { "7C3457EF-0000-11AA-AA11-00306543ECAC", RTDVMVOLTYPE_DARWIN_APFS }, + + { "6A82CB45-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* Boot */ + { "6A85CF4D-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* Root */ + { "6A87C46F-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* Swap */ + { "6A8B642B-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* Backup */ + { "6A898CC3-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* /usr */ + { "6A8EF2E9-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* /var */ + { "6A90BA39-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* /home */ + { "6A9283A5-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* Alternate sector */ + + { "37AFFC90-EF7D-4E96-91C3-2D7AE055B174", RTDVMVOLTYPE_IBM_GPFS }, +}; + +static DECLCALLBACK(int) rtDvmFmtGptProbe(PCRTDVMDISK pDisk, uint32_t *puScore) +{ + int rc = VINF_SUCCESS; + GPTHDR Hdr; + + *puScore = RTDVM_MATCH_SCORE_UNSUPPORTED; + + if (rtDvmDiskGetSectors(pDisk) >= 2) + { + /* Read from the disk and check for the signature. */ + rc = rtDvmDiskRead(pDisk, RTDVM_GPT_LBA2BYTE(1, pDisk), &Hdr, sizeof(GPTHDR)); + if ( RT_SUCCESS(rc) + && !strncmp(&Hdr.abSignature[0], RTDVM_GPT_SIGNATURE, RT_ELEMENTS(Hdr.abSignature)) + && RT_LE2H_U32(Hdr.u32Revision) == 0x00010000 + && RT_LE2H_U32(Hdr.cbHeader) == sizeof(GPTHDRREV1)) + *puScore = RTDVM_MATCH_SCORE_PERFECT; + } + + return rc; +} + +static DECLCALLBACK(int) rtDvmFmtGptOpen(PCRTDVMDISK pDisk, PRTDVMFMT phVolMgrFmt) +{ + int rc = VINF_SUCCESS; + PRTDVMFMTINTERNAL pThis = NULL; + + pThis = (PRTDVMFMTINTERNAL)RTMemAllocZ(sizeof(RTDVMFMTINTERNAL)); + if (pThis) + { + pThis->pDisk = pDisk; + pThis->cPartitions = 0; + + /* Read the complete GPT header and convert to host endianess. */ + rc = rtDvmDiskRead(pDisk, RTDVM_GPT_LBA2BYTE(1, pDisk), &pThis->HdrRev1, sizeof(pThis->HdrRev1)); + if (RT_SUCCESS(rc)) + { + pThis->HdrRev1.Hdr.u32Revision = RT_LE2H_U32(pThis->HdrRev1.Hdr.u32Revision); + pThis->HdrRev1.Hdr.cbHeader = RT_LE2H_U32(pThis->HdrRev1.Hdr.cbHeader); + pThis->HdrRev1.Hdr.u32Crc = RT_LE2H_U32(pThis->HdrRev1.Hdr.u32Crc); + pThis->HdrRev1.u64LbaCurrent = RT_LE2H_U64(pThis->HdrRev1.u64LbaCurrent); + pThis->HdrRev1.u64LbaBackup = RT_LE2H_U64(pThis->HdrRev1.u64LbaBackup); + pThis->HdrRev1.u64LbaFirstPartition = RT_LE2H_U64(pThis->HdrRev1.u64LbaFirstPartition); + pThis->HdrRev1.u64LbaLastPartition = RT_LE2H_U64(pThis->HdrRev1.u64LbaLastPartition); + /** @todo Disk UUID */ + pThis->HdrRev1.u64LbaPartitionEntries = RT_LE2H_U64(pThis->HdrRev1.u64LbaPartitionEntries); + pThis->HdrRev1.cPartitionEntries = RT_LE2H_U32(pThis->HdrRev1.cPartitionEntries); + pThis->HdrRev1.cbPartitionEntry = RT_LE2H_U32(pThis->HdrRev1.cbPartitionEntry); + pThis->HdrRev1.u32CrcPartitionEntries = RT_LE2H_U32(pThis->HdrRev1.u32CrcPartitionEntries); + + if (pThis->HdrRev1.cbPartitionEntry == sizeof(GPTENTRY)) + { + pThis->paGptEntries = (PGPTENTRY)RTMemAllocZ(pThis->HdrRev1.cPartitionEntries * pThis->HdrRev1.cbPartitionEntry); + if (pThis->paGptEntries) + { + rc = rtDvmDiskRead(pDisk, RTDVM_GPT_LBA2BYTE(pThis->HdrRev1.u64LbaPartitionEntries, pDisk), + pThis->paGptEntries, pThis->HdrRev1.cPartitionEntries * pThis->HdrRev1.cbPartitionEntry); + if (RT_SUCCESS(rc)) + { + /* Count the occupied entries. */ + for (unsigned i = 0; i < pThis->HdrRev1.cPartitionEntries; i++) + if (!RTUuidIsNull(&pThis->paGptEntries[i].UuidType)) + { + /* Convert to host endianess. */ + /** @todo Uuids */ + pThis->paGptEntries[i].u64LbaFirst = RT_LE2H_U64(pThis->paGptEntries[i].u64LbaFirst); + pThis->paGptEntries[i].u64LbaLast = RT_LE2H_U64(pThis->paGptEntries[i].u64LbaLast); + pThis->paGptEntries[i].u64Flags = RT_LE2H_U64(pThis->paGptEntries[i].u64Flags); + for (unsigned cwc = 0; cwc < RT_ELEMENTS(pThis->paGptEntries[i].aPartitionName); cwc++) + pThis->paGptEntries[i].aPartitionName[cwc] = RT_LE2H_U16(pThis->paGptEntries[i].aPartitionName[cwc]); + + pThis->cPartitions++; + } + } + + if (RT_FAILURE(rc)) + RTMemFree(pThis->paGptEntries); + } + else + rc = VERR_NO_MEMORY; + } + else + rc = VERR_NOT_SUPPORTED; + + if (RT_SUCCESS(rc)) + *phVolMgrFmt = pThis; + else + RTMemFree(pThis); + } + } + else + rc = VERR_NO_MEMORY; + + return rc; +} + +static DECLCALLBACK(int) rtDvmFmtGptInitialize(PCRTDVMDISK pDisk, PRTDVMFMT phVolMgrFmt) +{ + NOREF(pDisk); NOREF(phVolMgrFmt); + return VERR_NOT_IMPLEMENTED; +} + +static DECLCALLBACK(void) rtDvmFmtGptClose(RTDVMFMT hVolMgrFmt) +{ + PRTDVMFMTINTERNAL pThis = hVolMgrFmt; + + pThis->pDisk = NULL; + memset(&pThis->HdrRev1, 0, sizeof(pThis->HdrRev1)); + RTMemFree(pThis->paGptEntries); + + pThis->paGptEntries = NULL; + RTMemFree(pThis); +} + +static DECLCALLBACK(int) rtDvmFmtGptQueryRangeUse(RTDVMFMT hVolMgrFmt, + uint64_t off, uint64_t cbRange, + bool *pfUsed) +{ + PRTDVMFMTINTERNAL pThis = hVolMgrFmt; + + NOREF(cbRange); + + if (off < 33*pThis->pDisk->cbSector) + *pfUsed = true; + else + *pfUsed = false; + + return VINF_SUCCESS; +} + +static DECLCALLBACK(uint32_t) rtDvmFmtGptGetValidVolumes(RTDVMFMT hVolMgrFmt) +{ + PRTDVMFMTINTERNAL pThis = hVolMgrFmt; + + return pThis->cPartitions; +} + +static DECLCALLBACK(uint32_t) rtDvmFmtGptGetMaxVolumes(RTDVMFMT hVolMgrFmt) +{ + PRTDVMFMTINTERNAL pThis = hVolMgrFmt; + + return pThis->HdrRev1.cPartitionEntries; +} + +/** + * Creates a new volume. + * + * @returns IPRT status code. + * @param pThis The MBR volume manager data. + * @param pGptEntry The GPT entry. + * @param idx The index in the partition array. + * @param phVolFmt Where to store the volume data on success. + */ +static int rtDvmFmtMbrVolumeCreate(PRTDVMFMTINTERNAL pThis, PGPTENTRY pGptEntry, + uint32_t idx, PRTDVMVOLUMEFMT phVolFmt) +{ + int rc = VINF_SUCCESS; + PRTDVMVOLUMEFMTINTERNAL pVol = (PRTDVMVOLUMEFMTINTERNAL)RTMemAllocZ(sizeof(RTDVMVOLUMEFMTINTERNAL)); + + if (pVol) + { + pVol->pVolMgr = pThis; + pVol->idxEntry = idx; + pVol->pGptEntry = pGptEntry; + pVol->offStart = RTDVM_GPT_LBA2BYTE(pGptEntry->u64LbaFirst, pThis->pDisk); + pVol->cbVolume = RTDVM_GPT_LBA2BYTE(pGptEntry->u64LbaLast - pGptEntry->u64LbaFirst + 1, pThis->pDisk); + + *phVolFmt = pVol; + } + else + rc = VERR_NO_MEMORY; + + return rc; +} + +static DECLCALLBACK(int) rtDvmFmtGptQueryFirstVolume(RTDVMFMT hVolMgrFmt, PRTDVMVOLUMEFMT phVolFmt) +{ + PRTDVMFMTINTERNAL pThis = hVolMgrFmt; + + if (pThis->cPartitions != 0) + { + PGPTENTRY pGptEntry = &pThis->paGptEntries[0]; + + /* Search for the first non empty entry. */ + for (unsigned i = 0; i < pThis->HdrRev1.cPartitionEntries; i++) + { + if (!RTUuidIsNull(&pGptEntry->UuidType)) + return rtDvmFmtMbrVolumeCreate(pThis, pGptEntry, i, phVolFmt); + pGptEntry++; + } + AssertFailed(); + } + return VERR_DVM_MAP_EMPTY; +} + +static DECLCALLBACK(int) rtDvmFmtGptQueryNextVolume(RTDVMFMT hVolMgrFmt, RTDVMVOLUMEFMT hVolFmt, PRTDVMVOLUMEFMT phVolFmtNext) +{ + PRTDVMFMTINTERNAL pThis = hVolMgrFmt; + PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt; + PGPTENTRY pGptEntry = pVol->pGptEntry + 1; + + for (unsigned i = pVol->idxEntry + 1; i < pThis->HdrRev1.cPartitionEntries; i++) + { + if (!RTUuidIsNull(&pGptEntry->UuidType)) + return rtDvmFmtMbrVolumeCreate(pThis, pGptEntry, i, phVolFmtNext); + pGptEntry++; + } + + return VERR_DVM_MAP_NO_VOLUME; +} + +static DECLCALLBACK(void) rtDvmFmtGptVolumeClose(RTDVMVOLUMEFMT hVolFmt) +{ + PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt; + + pVol->pVolMgr = NULL; + pVol->offStart = 0; + pVol->cbVolume = 0; + pVol->pGptEntry = NULL; + + RTMemFree(pVol); +} + +static DECLCALLBACK(uint64_t) rtDvmFmtGptVolumeGetSize(RTDVMVOLUMEFMT hVolFmt) +{ + PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt; + + return pVol->cbVolume; +} + +static DECLCALLBACK(int) rtDvmFmtGptVolumeQueryName(RTDVMVOLUMEFMT hVolFmt, char **ppszVolName) +{ + PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt; + + *ppszVolName = NULL; + return RTUtf16ToUtf8Ex(&pVol->pGptEntry->aPartitionName[0], RT_ELEMENTS(pVol->pGptEntry->aPartitionName), + ppszVolName, 0, NULL); +} + +static DECLCALLBACK(RTDVMVOLTYPE) rtDvmFmtGptVolumeGetType(RTDVMVOLUMEFMT hVolFmt) +{ + PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt; + + for (unsigned i = 0; i < RT_ELEMENTS(g_aPartType2DvmVolTypes); i++) + if (!RTUuidCompareStr(&pVol->pGptEntry->UuidType, g_aPartType2DvmVolTypes[i].pcszUuid)) + return g_aPartType2DvmVolTypes[i].enmVolType; + + return RTDVMVOLTYPE_UNKNOWN; +} + +static DECLCALLBACK(uint64_t) rtDvmFmtGptVolumeGetFlags(RTDVMVOLUMEFMT hVolFmt) +{ + NOREF(hVolFmt); + return DVMVOLUME_F_CONTIGUOUS; +} + +static DECLCALLBACK(int) rtDvmFmtGptVolumeQueryRange(RTDVMVOLUMEFMT hVolFmt, uint64_t *poffStart, uint64_t *poffLast) +{ + PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt; + *poffStart = pVol->offStart; + *poffLast = pVol->offStart + pVol->cbVolume - 1; + return VINF_SUCCESS; +} + +static DECLCALLBACK(bool) rtDvmFmtGptVolumeIsRangeIntersecting(RTDVMVOLUMEFMT hVolFmt, + uint64_t offStart, size_t cbRange, + uint64_t *poffVol, + uint64_t *pcbIntersect) +{ + PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt; + + if (RTDVM_RANGE_IS_INTERSECTING(pVol->offStart, pVol->cbVolume, offStart)) + { + *poffVol = offStart - pVol->offStart; + *pcbIntersect = RT_MIN(cbRange, pVol->offStart + pVol->cbVolume - offStart); + return true; + } + return false; +} + +static DECLCALLBACK(int) rtDvmFmtGptVolumeRead(RTDVMVOLUMEFMT hVolFmt, uint64_t off, void *pvBuf, size_t cbRead) +{ + PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt; + AssertReturn(off + cbRead <= pVol->cbVolume, VERR_INVALID_PARAMETER); + + return rtDvmDiskRead(pVol->pVolMgr->pDisk, pVol->offStart + off, pvBuf, cbRead); +} + +static DECLCALLBACK(int) rtDvmFmtGptVolumeWrite(RTDVMVOLUMEFMT hVolFmt, uint64_t off, const void *pvBuf, size_t cbWrite) +{ + PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt; + AssertReturn(off + cbWrite <= pVol->cbVolume, VERR_INVALID_PARAMETER); + + return rtDvmDiskWrite(pVol->pVolMgr->pDisk, pVol->offStart + off, pvBuf, cbWrite); +} + +RTDVMFMTOPS g_rtDvmFmtGpt = +{ + /* pszFmt */ + "GPT", + /* enmFormat, */ + RTDVMFORMATTYPE_GPT, + /* pfnProbe */ + rtDvmFmtGptProbe, + /* pfnOpen */ + rtDvmFmtGptOpen, + /* pfnInitialize */ + rtDvmFmtGptInitialize, + /* pfnClose */ + rtDvmFmtGptClose, + /* pfnQueryRangeUse */ + rtDvmFmtGptQueryRangeUse, + /* pfnGetValidVolumes */ + rtDvmFmtGptGetValidVolumes, + /* pfnGetMaxVolumes */ + rtDvmFmtGptGetMaxVolumes, + /* pfnQueryFirstVolume */ + rtDvmFmtGptQueryFirstVolume, + /* pfnQueryNextVolume */ + rtDvmFmtGptQueryNextVolume, + /* pfnVolumeClose */ + rtDvmFmtGptVolumeClose, + /* pfnVolumeGetSize */ + rtDvmFmtGptVolumeGetSize, + /* pfnVolumeQueryName */ + rtDvmFmtGptVolumeQueryName, + /* pfnVolumeGetType */ + rtDvmFmtGptVolumeGetType, + /* pfnVolumeGetFlags */ + rtDvmFmtGptVolumeGetFlags, + /* pfnVolumeQueryRange */ + rtDvmFmtGptVolumeQueryRange, + /* pfnVolumeIsRangeIntersecting */ + rtDvmFmtGptVolumeIsRangeIntersecting, + /* pfnVolumeRead */ + rtDvmFmtGptVolumeRead, + /* pfnVolumeWrite */ + rtDvmFmtGptVolumeWrite +}; + |