Adding upstream version 6.1.22-dfsg.upstream/6.1.22-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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
+};
+