[12639] | 1 | /* $Id: VBoxHDD.cpp 32858 2010-10-01 08:49:05Z vboxsync $ */
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[2379] | 2 | /** @file
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[12639] | 3 | * VBoxHDD - VBox HDD Container implementation.
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[2379] | 4 | */
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| 5 |
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| 6 | /*
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[28800] | 7 | * Copyright (C) 2006-2010 Oracle Corporation
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[2379] | 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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[5999] | 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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[2379] | 16 | */
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| 17 |
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| 18 | /*******************************************************************************
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| 19 | * Header Files *
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| 20 | *******************************************************************************/
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| 21 | #define LOG_GROUP LOG_GROUP_VD
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[16873] | 22 | #include <VBox/VBoxHDD.h>
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[2379] | 23 | #include <VBox/err.h>
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[12423] | 24 | #include <VBox/sup.h>
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| 25 | #include <VBox/log.h>
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[2379] | 26 |
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| 27 | #include <iprt/alloc.h>
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| 28 | #include <iprt/assert.h>
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| 29 | #include <iprt/uuid.h>
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| 30 | #include <iprt/file.h>
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| 31 | #include <iprt/string.h>
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| 32 | #include <iprt/asm.h>
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[4522] | 33 | #include <iprt/ldr.h>
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[5101] | 34 | #include <iprt/dir.h>
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| 35 | #include <iprt/path.h>
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[6291] | 36 | #include <iprt/param.h>
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[27808] | 37 | #include <iprt/memcache.h>
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[28065] | 38 | #include <iprt/sg.h>
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[28620] | 39 | #include <iprt/critsect.h>
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| 40 | #include <iprt/list.h>
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[30555] | 41 | #include <iprt/avl.h>
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[2379] | 42 |
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[23223] | 43 | #include <VBox/VBoxHDD-Plugin.h>
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[32370] | 44 | #include <VBox/VBoxHDD-CachePlugin.h>
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[2379] | 45 |
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[26987] | 46 | #define VBOXHDDDISK_SIGNATURE 0x6f0e2a7d
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| 47 |
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| 48 | /** Buffer size used for merging images. */
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| 49 | #define VD_MERGE_BUFFER_SIZE (16 * _1M)
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| 50 |
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[27977] | 51 | /** Maximum number of segments in one I/O task. */
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| 52 | #define VD_IO_TASK_SEGMENTS_MAX 64
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| 53 |
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[26987] | 54 | /**
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| 55 | * VD async I/O interface storage descriptor.
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| 56 | */
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[32553] | 57 | typedef struct VDIIOFALLBACKSTORAGE
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[26987] | 58 | {
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| 59 | /** File handle. */
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| 60 | RTFILE File;
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| 61 | /** Completion callback. */
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| 62 | PFNVDCOMPLETED pfnCompleted;
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| 63 | /** Thread for async access. */
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| 64 | RTTHREAD ThreadAsync;
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[32553] | 65 | } VDIIOFALLBACKSTORAGE, *PVDIIOFALLBACKSTORAGE;
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[26987] | 66 |
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| 67 | /**
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| 68 | * VBox HDD Container image descriptor.
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| 69 | */
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| 70 | typedef struct VDIMAGE
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| 71 | {
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| 72 | /** Link to parent image descriptor, if any. */
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| 73 | struct VDIMAGE *pPrev;
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| 74 | /** Link to child image descriptor, if any. */
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| 75 | struct VDIMAGE *pNext;
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| 76 | /** Container base filename. (UTF-8) */
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| 77 | char *pszFilename;
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| 78 | /** Data managed by the backend which keeps the actual info. */
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[32536] | 79 | void *pBackendData;
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[26987] | 80 | /** Cached sanitized image flags. */
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| 81 | unsigned uImageFlags;
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| 82 | /** Image open flags (only those handled generically in this code and which
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| 83 | * the backends will never ever see). */
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| 84 | unsigned uOpenFlags;
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| 85 |
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| 86 | /** Function pointers for the various backend methods. */
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| 87 | PCVBOXHDDBACKEND Backend;
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[32691] | 88 |
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| 89 | /** Pointer to list of VD interfaces, per-image. */
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| 90 | PVDINTERFACE pVDIfsImage;
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| 91 |
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| 92 | /** I/O interface to the upper layer. */
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| 93 | PVDINTERFACE pInterfaceIO;
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| 94 | /** I/O interface callback table. */
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| 95 | PVDINTERFACEIO pInterfaceIOCallbacks;
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| 96 |
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[32553] | 97 | /** Per image internal I/O interface. */
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[32691] | 98 | VDINTERFACE VDIIOInt;
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| 99 |
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| 100 | /** Fallback I/O interface, only used if the caller doesn't provide it. */
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[28620] | 101 | VDINTERFACE VDIIO;
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[32691] | 102 |
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[28620] | 103 | /** Disk this image is part of */
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| 104 | PVBOXHDD pDisk;
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[26987] | 105 | } VDIMAGE, *PVDIMAGE;
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| 106 |
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| 107 | /**
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| 108 | * uModified bit flags.
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| 109 | */
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| 110 | #define VD_IMAGE_MODIFIED_FLAG RT_BIT(0)
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| 111 | #define VD_IMAGE_MODIFIED_FIRST RT_BIT(1)
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| 112 | #define VD_IMAGE_MODIFIED_DISABLE_UUID_UPDATE RT_BIT(2)
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| 113 |
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| 114 |
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| 115 | /**
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[32370] | 116 | * VBox HDD Cache image descriptor.
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| 117 | */
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| 118 | typedef struct VDCACHE
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| 119 | {
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| 120 | /** Cache base filename. (UTF-8) */
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| 121 | char *pszFilename;
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| 122 | /** Data managed by the backend which keeps the actual info. */
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[32536] | 123 | void *pBackendData;
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[32370] | 124 | /** Cached sanitized image flags. */
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| 125 | unsigned uImageFlags;
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| 126 | /** Image open flags (only those handled generically in this code and which
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| 127 | * the backends will never ever see). */
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| 128 | unsigned uOpenFlags;
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| 129 |
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| 130 | /** Function pointers for the various backend methods. */
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| 131 | PCVDCACHEBACKEND Backend;
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[32691] | 132 |
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| 133 | /** Pointer to list of VD interfaces, per-cache. */
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| 134 | PVDINTERFACE pVDIfsCache;
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| 135 |
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| 136 | /** I/O interface to the upper layer. */
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| 137 | PVDINTERFACE pInterfaceIO;
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| 138 | /** I/O interface callback table. */
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| 139 | PVDINTERFACEIO pInterfaceIOCallbacks;
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| 140 |
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[32553] | 141 | /** Per image internal I/O interface. */
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[32691] | 142 | VDINTERFACE VDIIOInt;
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| 143 |
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| 144 | /** Fallback I/O interface, only used if the caller doesn't provide it. */
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[32370] | 145 | VDINTERFACE VDIIO;
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[32691] | 146 |
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[32370] | 147 | /** Disk this image is part of */
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| 148 | PVBOXHDD pDisk;
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| 149 | } VDCACHE, *PVDCACHE;
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| 150 |
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| 151 | /**
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[26987] | 152 | * VBox HDD Container main structure, private part.
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| 153 | */
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| 154 | struct VBOXHDD
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| 155 | {
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| 156 | /** Structure signature (VBOXHDDDISK_SIGNATURE). */
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| 157 | uint32_t u32Signature;
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| 158 |
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| 159 | /** Number of opened images. */
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| 160 | unsigned cImages;
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| 161 |
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| 162 | /** Base image. */
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| 163 | PVDIMAGE pBase;
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| 164 |
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| 165 | /** Last opened image in the chain.
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| 166 | * The same as pBase if only one image is used. */
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| 167 | PVDIMAGE pLast;
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| 168 |
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| 169 | /** Flags representing the modification state. */
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| 170 | unsigned uModified;
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| 171 |
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| 172 | /** Cached size of this disk. */
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| 173 | uint64_t cbSize;
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| 174 | /** Cached PCHS geometry for this disk. */
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[32536] | 175 | VDGEOMETRY PCHSGeometry;
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[26987] | 176 | /** Cached LCHS geometry for this disk. */
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[32536] | 177 | VDGEOMETRY LCHSGeometry;
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[26987] | 178 |
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| 179 | /** Pointer to list of VD interfaces, per-disk. */
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| 180 | PVDINTERFACE pVDIfsDisk;
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| 181 | /** Pointer to the common interface structure for error reporting. */
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| 182 | PVDINTERFACE pInterfaceError;
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[27232] | 183 | /** Pointer to the error interface callbacks we use if available. */
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[26987] | 184 | PVDINTERFACEERROR pInterfaceErrorCallbacks;
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| 185 |
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[27232] | 186 | /** Pointer to the optional thread synchronization interface. */
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| 187 | PVDINTERFACE pInterfaceThreadSync;
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| 188 | /** Pointer to the optional thread synchronization callbacks. */
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| 189 | PVDINTERFACETHREADSYNC pInterfaceThreadSyncCallbacks;
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| 190 |
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[32553] | 191 | /** Internal I/O interface callback table for the images. */
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| 192 | VDINTERFACEIOINT VDIIOIntCallbacks;
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[27808] | 193 |
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[32553] | 194 | /** Callback table for the fallback I/O interface. */
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| 195 | VDINTERFACEIO VDIIOCallbacks;
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[27808] | 196 |
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| 197 | /** Memory cache for I/O contexts */
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| 198 | RTMEMCACHE hMemCacheIoCtx;
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[27977] | 199 | /** Memory cache for I/O tasks. */
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| 200 | RTMEMCACHE hMemCacheIoTask;
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[28620] | 201 | /** Critical section protecting the disk against concurrent access. */
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| 202 | RTCRITSECT CritSect;
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| 203 | /** Flag whether the last image is currently written to and needs to grow.
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| 204 | * Other write requests which will grow the image too need to be deferred to
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| 205 | * prevent data corruption. - Protected by the critical section.
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| 206 | */
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[28683] | 207 | volatile bool fGrowing;
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[28620] | 208 | /** List of waiting requests. - Protected by the critical section. */
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| 209 | RTLISTNODE ListWriteGrowing;
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[32370] | 210 |
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| 211 | /** Pointer to the L2 disk cache if any. */
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| 212 | PVDCACHE pCache;
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[26987] | 213 | };
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| 214 |
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[30555] | 215 | # define VD_THREAD_IS_CRITSECT_OWNER(Disk) \
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| 216 | do \
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| 217 | { \
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| 218 | AssertMsg(RTCritSectIsOwner(&Disk->CritSect), \
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| 219 | ("Thread does not own critical section\n"));\
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| 220 | } while(0)
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[26987] | 221 |
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| 222 | /**
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| 223 | * VBox parent read descriptor, used internally for compaction.
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| 224 | */
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| 225 | typedef struct VDPARENTSTATEDESC
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| 226 | {
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| 227 | /** Pointer to disk descriptor. */
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| 228 | PVBOXHDD pDisk;
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| 229 | /** Pointer to image descriptor. */
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| 230 | PVDIMAGE pImage;
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| 231 | } VDPARENTSTATEDESC, *PVDPARENTSTATEDESC;
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| 232 |
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[27808] | 233 | /**
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| 234 | * Transfer direction.
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| 235 | */
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| 236 | typedef enum VDIOCTXTXDIR
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| 237 | {
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| 238 | /** Read */
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| 239 | VDIOCTXTXDIR_READ = 0,
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| 240 | /** Write */
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| 241 | VDIOCTXTXDIR_WRITE,
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| 242 | /** Flush */
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| 243 | VDIOCTXTXDIR_FLUSH,
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| 244 | /** 32bit hack */
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| 245 | VDIOCTXTXDIR_32BIT_HACK = 0x7fffffff
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| 246 | } VDIOCTXTXDIR, *PVDIOCTXTXDIR;
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[26987] | 247 |
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[28620] | 248 | /** Transfer function */
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| 249 | typedef DECLCALLBACK(int) FNVDIOCTXTRANSFER (PVDIOCTX pIoCtx);
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| 250 | /** Pointer to a transfer function. */
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| 251 | typedef FNVDIOCTXTRANSFER *PFNVDIOCTXTRANSFER;
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| 252 |
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[27808] | 253 | /**
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| 254 | * I/O context
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| 255 | */
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| 256 | typedef struct VDIOCTX
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| 257 | {
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[27977] | 258 | /** Disk this is request is for. */
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| 259 | PVBOXHDD pDisk;
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| 260 | /** Return code. */
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| 261 | int rcReq;
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[27808] | 262 | /** Transfer direction */
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| 263 | VDIOCTXTXDIR enmTxDir;
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| 264 | /** Number of bytes left until this context completes. */
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| 265 | volatile uint32_t cbTransferLeft;
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| 266 | /** Current offset */
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| 267 | volatile uint64_t uOffset;
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[28620] | 268 | /** Number of bytes to transfer */
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| 269 | volatile size_t cbTransfer;
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| 270 | /** Current image in the chain. */
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| 271 | PVDIMAGE pImage;
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[28065] | 272 | /** S/G buffer */
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| 273 | RTSGBUF SgBuf;
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[28683] | 274 | /** Flag whether the I/O context is blocked because it is in the growing list. */
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| 275 | bool fBlocked;
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[29240] | 276 | /** Number of data transfers currently pending. */
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| 277 | volatile uint32_t cDataTransfersPending;
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[27977] | 278 | /** How many meta data transfers are pending. */
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| 279 | volatile uint32_t cMetaTransfersPending;
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[28065] | 280 | /** Flag whether the request finished */
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| 281 | volatile bool fComplete;
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[28154] | 282 | /** Temporary allocated memory which is freed
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| 283 | * when the context completes. */
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| 284 | void *pvAllocation;
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[28620] | 285 | /** Transfer function. */
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| 286 | PFNVDIOCTXTRANSFER pfnIoCtxTransfer;
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| 287 | /** Next transfer part after the current one completed. */
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| 288 | PFNVDIOCTXTRANSFER pfnIoCtxTransferNext;
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[28065] | 289 | /** Parent I/O context if any. Sets the type of the context (root/child) */
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| 290 | PVDIOCTX pIoCtxParent;
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| 291 | /** Type dependent data (root/child) */
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| 292 | union
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| 293 | {
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| 294 | /** Root data */
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| 295 | struct
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| 296 | {
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| 297 | /** Completion callback */
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| 298 | PFNVDASYNCTRANSFERCOMPLETE pfnComplete;
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| 299 | /** User argument 1 passed on completion. */
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| 300 | void *pvUser1;
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| 301 | /** User argument 1 passed on completion. */
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| 302 | void *pvUser2;
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| 303 | } Root;
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| 304 | /** Child data */
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| 305 | struct
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| 306 | {
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| 307 | /** Saved start offset */
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| 308 | uint64_t uOffsetSaved;
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| 309 | /** Saved transfer size */
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| 310 | size_t cbTransferLeftSaved;
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| 311 | /** Number of bytes transfered from the parent if this context completes. */
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| 312 | size_t cbTransferParent;
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[28620] | 313 | /** Number of bytes to pre read */
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| 314 | size_t cbPreRead;
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| 315 | /** Number of bytes to post read. */
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| 316 | size_t cbPostRead;
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[30044] | 317 | /** Number of bytes to write left in the parent. */
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| 318 | size_t cbWriteParent;
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[28620] | 319 | /** Write type dependent data. */
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| 320 | union
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| 321 | {
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| 322 | /** Optimized */
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| 323 | struct
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| 324 | {
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| 325 | /** Bytes to fill to satisfy the block size. Not part of the virtual disk. */
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| 326 | size_t cbFill;
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| 327 | /** Bytes to copy instead of reading from the parent */
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| 328 | size_t cbWriteCopy;
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| 329 | /** Bytes to read from the image. */
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| 330 | size_t cbReadImage;
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| 331 | } Optimized;
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| 332 | } Write;
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[28065] | 333 | } Child;
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| 334 | } Type;
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[27808] | 335 | } VDIOCTX;
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| 336 |
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[30555] | 337 | typedef struct VDIOCTXDEFERRED
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| 338 | {
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| 339 | /** Node in the list of deferred requests.
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| 340 | * A request can be deferred if the image is growing
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| 341 | * and the request accesses the same range or if
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| 342 | * the backend needs to read or write metadata from the disk
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| 343 | * before it can continue. */
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| 344 | RTLISTNODE NodeDeferred;
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| 345 | /** I/O context this entry points to. */
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| 346 | PVDIOCTX pIoCtx;
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| 347 | } VDIOCTXDEFERRED, *PVDIOCTXDEFERRED;
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| 348 |
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[27808] | 349 | /**
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[27977] | 350 | * I/O task.
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| 351 | */
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| 352 | typedef struct VDIOTASK
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| 353 | {
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[30555] | 354 | /** Storage this task belongs to. */
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| 355 | PVDIOSTORAGE pIoStorage;
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| 356 | /** Optional completion callback. */
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| 357 | PFNVDXFERCOMPLETED pfnComplete;
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| 358 | /** Opaque user data. */
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| 359 | void *pvUser;
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[27977] | 360 | /** Flag whether this is a meta data transfer. */
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| 361 | bool fMeta;
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| 362 | /** Type dependent data. */
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| 363 | union
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| 364 | {
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| 365 | /** User data transfer. */
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| 366 | struct
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| 367 | {
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| 368 | /** Number of bytes this task transfered. */
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| 369 | uint32_t cbTransfer;
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[30555] | 370 | /** Pointer to the I/O context the task belongs. */
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| 371 | PVDIOCTX pIoCtx;
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[27977] | 372 | } User;
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| 373 | /** Meta data transfer. */
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| 374 | struct
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| 375 | {
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[30555] | 376 | /** Meta transfer this task is for. */
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| 377 | PVDMETAXFER pMetaXfer;
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[27977] | 378 | } Meta;
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| 379 | } Type;
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| 380 | } VDIOTASK, *PVDIOTASK;
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| 381 |
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| 382 | /**
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[27808] | 383 | * Storage handle.
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| 384 | */
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| 385 | typedef struct VDIOSTORAGE
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| 386 | {
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[28620] | 387 | /** Image this storage handle belongs to. */
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| 388 | PVDIMAGE pImage;
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[30555] | 389 | /** AVL tree for pending async metadata transfers. */
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| 390 | PAVLRFOFFTREE pTreeMetaXfers;
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[32553] | 391 | /** Storage handle */
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| 392 | void *pStorage;
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[27808] | 393 | } VDIOSTORAGE;
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| 394 |
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[30555] | 395 | /**
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| 396 | * Metadata transfer.
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| 397 | *
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| 398 | * @note This entry can't be freed if either the list is not empty or
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| 399 | * the reference counter is not 0.
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| 400 | * The assumption is that the backends don't need to read huge amounts of
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| 401 | * metadata to complete a transfer so the additional memory overhead should
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| 402 | * be relatively small.
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| 403 | */
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| 404 | typedef struct VDMETAXFER
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| 405 | {
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| 406 | /** AVL core for fast search (the file offset is the key) */
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| 407 | AVLRFOFFNODECORE Core;
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| 408 | /** I/O storage for this transfer. */
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| 409 | PVDIOSTORAGE pIoStorage;
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| 410 | /** Flags. */
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| 411 | uint32_t fFlags;
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| 412 | /** List of I/O contexts waiting for this metadata transfer to complete. */
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| 413 | RTLISTNODE ListIoCtxWaiting;
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| 414 | /** Number of references to this entry. */
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| 415 | unsigned cRefs;
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| 416 | /** Size of the data stored with this entry. */
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| 417 | size_t cbMeta;
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| 418 | /** Data stored - variable size. */
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| 419 | uint8_t abData[1];
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| 420 | } VDMETAXFER;
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| 421 |
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| 422 | /**
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| 423 | * The transfer direction for the metadata.
|
---|
| 424 | */
|
---|
| 425 | #define VDMETAXFER_TXDIR_MASK 0x3
|
---|
| 426 | #define VDMETAXFER_TXDIR_NONE 0x0
|
---|
| 427 | #define VDMETAXFER_TXDIR_WRITE 0x1
|
---|
| 428 | #define VDMETAXFER_TXDIR_READ 0x2
|
---|
| 429 | #define VDMETAXFER_TXDIR_FLUSH 0x3
|
---|
| 430 | #define VDMETAXFER_TXDIR_GET(flags) ((flags) & VDMETAXFER_TXDIR_MASK)
|
---|
| 431 | #define VDMETAXFER_TXDIR_SET(flags, dir) ((flags) = (flags & ~VDMETAXFER_TXDIR_MASK) | (dir))
|
---|
| 432 |
|
---|
[7780] | 433 | extern VBOXHDDBACKEND g_RawBackend;
|
---|
[2379] | 434 | extern VBOXHDDBACKEND g_VmdkBackend;
|
---|
[32573] | 435 | extern VBOXHDDBACKEND g_VmdkStreamBackend;
|
---|
[7160] | 436 | extern VBOXHDDBACKEND g_VDIBackend;
|
---|
[6173] | 437 | extern VBOXHDDBACKEND g_VhdBackend;
|
---|
[21371] | 438 | extern VBOXHDDBACKEND g_ParallelsBackend;
|
---|
[32432] | 439 | #ifdef VBOX_WITH_DMG
|
---|
| 440 | extern VBOXHDDBACKEND g_DmgBackend;
|
---|
| 441 | #endif
|
---|
[10540] | 442 | #ifdef VBOX_WITH_ISCSI
|
---|
| 443 | extern VBOXHDDBACKEND g_ISCSIBackend;
|
---|
| 444 | #endif
|
---|
[2379] | 445 |
|
---|
[14852] | 446 | static unsigned g_cBackends = 0;
|
---|
| 447 | static PVBOXHDDBACKEND *g_apBackends = NULL;
|
---|
| 448 | static PVBOXHDDBACKEND aStaticBackends[] =
|
---|
[2379] | 449 | {
|
---|
[7780] | 450 | &g_RawBackend,
|
---|
[6292] | 451 | &g_VmdkBackend,
|
---|
[32573] | 452 | &g_VmdkStreamBackend,
|
---|
[7161] | 453 | &g_VDIBackend,
|
---|
[21371] | 454 | &g_VhdBackend,
|
---|
| 455 | &g_ParallelsBackend
|
---|
[32432] | 456 | #ifdef VBOX_WITH_DMG
|
---|
| 457 | ,&g_DmgBackend
|
---|
| 458 | #endif
|
---|
[10540] | 459 | #ifdef VBOX_WITH_ISCSI
|
---|
[14852] | 460 | ,&g_ISCSIBackend
|
---|
[10540] | 461 | #endif
|
---|
[2379] | 462 | };
|
---|
| 463 |
|
---|
[14852] | 464 | /**
|
---|
[32370] | 465 | * Supported backends for the disk cache.
|
---|
| 466 | */
|
---|
| 467 | extern VDCACHEBACKEND g_VciCacheBackend;
|
---|
| 468 |
|
---|
| 469 | static unsigned g_cCacheBackends = 0;
|
---|
| 470 | static PVDCACHEBACKEND *g_apCacheBackends = NULL;
|
---|
| 471 | static PVDCACHEBACKEND aStaticCacheBackends[] =
|
---|
| 472 | {
|
---|
| 473 | &g_VciCacheBackend
|
---|
| 474 | };
|
---|
| 475 |
|
---|
| 476 | /**
|
---|
[14852] | 477 | * internal: add several backends.
|
---|
| 478 | */
|
---|
| 479 | static int vdAddBackends(PVBOXHDDBACKEND *ppBackends, unsigned cBackends)
|
---|
| 480 | {
|
---|
| 481 | PVBOXHDDBACKEND *pTmp = (PVBOXHDDBACKEND*)RTMemRealloc(g_apBackends,
|
---|
| 482 | (g_cBackends + cBackends) * sizeof(PVBOXHDDBACKEND));
|
---|
| 483 | if (RT_UNLIKELY(!pTmp))
|
---|
| 484 | return VERR_NO_MEMORY;
|
---|
| 485 | g_apBackends = pTmp;
|
---|
| 486 | memcpy(&g_apBackends[g_cBackends], ppBackends, cBackends * sizeof(PVBOXHDDBACKEND));
|
---|
| 487 | g_cBackends += cBackends;
|
---|
| 488 | return VINF_SUCCESS;
|
---|
| 489 | }
|
---|
[2379] | 490 |
|
---|
| 491 | /**
|
---|
[14852] | 492 | * internal: add single backend.
|
---|
| 493 | */
|
---|
| 494 | DECLINLINE(int) vdAddBackend(PVBOXHDDBACKEND pBackend)
|
---|
| 495 | {
|
---|
| 496 | return vdAddBackends(&pBackend, 1);
|
---|
| 497 | }
|
---|
| 498 |
|
---|
| 499 | /**
|
---|
[32370] | 500 | * internal: add several cache backends.
|
---|
| 501 | */
|
---|
| 502 | static int vdAddCacheBackends(PVDCACHEBACKEND *ppBackends, unsigned cBackends)
|
---|
| 503 | {
|
---|
| 504 | PVDCACHEBACKEND *pTmp = (PVDCACHEBACKEND*)RTMemRealloc(g_apCacheBackends,
|
---|
| 505 | (g_cCacheBackends + cBackends) * sizeof(PVDCACHEBACKEND));
|
---|
| 506 | if (RT_UNLIKELY(!pTmp))
|
---|
| 507 | return VERR_NO_MEMORY;
|
---|
| 508 | g_apCacheBackends = pTmp;
|
---|
| 509 | memcpy(&g_apCacheBackends[g_cCacheBackends], ppBackends, cBackends * sizeof(PVDCACHEBACKEND));
|
---|
| 510 | g_cCacheBackends += cBackends;
|
---|
| 511 | return VINF_SUCCESS;
|
---|
| 512 | }
|
---|
| 513 |
|
---|
| 514 | /**
|
---|
| 515 | * internal: add single cache backend.
|
---|
| 516 | */
|
---|
| 517 | DECLINLINE(int) vdAddCacheBackend(PVDCACHEBACKEND pBackend)
|
---|
| 518 | {
|
---|
| 519 | return vdAddCacheBackends(&pBackend, 1);
|
---|
| 520 | }
|
---|
| 521 |
|
---|
| 522 | /**
|
---|
[7277] | 523 | * internal: issue error message.
|
---|
[2379] | 524 | */
|
---|
[7277] | 525 | static int vdError(PVBOXHDD pDisk, int rc, RT_SRC_POS_DECL,
|
---|
| 526 | const char *pszFormat, ...)
|
---|
[2379] | 527 | {
|
---|
| 528 | va_list va;
|
---|
| 529 | va_start(va, pszFormat);
|
---|
[10715] | 530 | if (pDisk->pInterfaceErrorCallbacks)
|
---|
| 531 | pDisk->pInterfaceErrorCallbacks->pfnError(pDisk->pInterfaceError->pvUser, rc, RT_SRC_POS_ARGS, pszFormat, va);
|
---|
[2379] | 532 | va_end(va);
|
---|
| 533 | return rc;
|
---|
| 534 | }
|
---|
| 535 |
|
---|
| 536 | /**
|
---|
[27232] | 537 | * internal: thread synchronization, start read.
|
---|
| 538 | */
|
---|
| 539 | DECLINLINE(int) vdThreadStartRead(PVBOXHDD pDisk)
|
---|
| 540 | {
|
---|
| 541 | int rc = VINF_SUCCESS;
|
---|
| 542 | if (RT_UNLIKELY(pDisk->pInterfaceThreadSyncCallbacks))
|
---|
| 543 | rc = pDisk->pInterfaceThreadSyncCallbacks->pfnStartRead(pDisk->pInterfaceThreadSync->pvUser);
|
---|
| 544 | return rc;
|
---|
| 545 | }
|
---|
| 546 |
|
---|
| 547 | /**
|
---|
| 548 | * internal: thread synchronization, finish read.
|
---|
| 549 | */
|
---|
| 550 | DECLINLINE(int) vdThreadFinishRead(PVBOXHDD pDisk)
|
---|
| 551 | {
|
---|
| 552 | int rc = VINF_SUCCESS;
|
---|
| 553 | if (RT_UNLIKELY(pDisk->pInterfaceThreadSyncCallbacks))
|
---|
| 554 | rc = pDisk->pInterfaceThreadSyncCallbacks->pfnFinishRead(pDisk->pInterfaceThreadSync->pvUser);
|
---|
| 555 | return rc;
|
---|
| 556 | }
|
---|
| 557 |
|
---|
| 558 | /**
|
---|
| 559 | * internal: thread synchronization, start write.
|
---|
| 560 | */
|
---|
| 561 | DECLINLINE(int) vdThreadStartWrite(PVBOXHDD pDisk)
|
---|
| 562 | {
|
---|
| 563 | int rc = VINF_SUCCESS;
|
---|
| 564 | if (RT_UNLIKELY(pDisk->pInterfaceThreadSyncCallbacks))
|
---|
| 565 | rc = pDisk->pInterfaceThreadSyncCallbacks->pfnStartWrite(pDisk->pInterfaceThreadSync->pvUser);
|
---|
| 566 | return rc;
|
---|
| 567 | }
|
---|
| 568 |
|
---|
| 569 | /**
|
---|
| 570 | * internal: thread synchronization, finish write.
|
---|
| 571 | */
|
---|
| 572 | DECLINLINE(int) vdThreadFinishWrite(PVBOXHDD pDisk)
|
---|
| 573 | {
|
---|
| 574 | int rc = VINF_SUCCESS;
|
---|
| 575 | if (RT_UNLIKELY(pDisk->pInterfaceThreadSyncCallbacks))
|
---|
| 576 | rc = pDisk->pInterfaceThreadSyncCallbacks->pfnFinishWrite(pDisk->pInterfaceThreadSync->pvUser);
|
---|
| 577 | return rc;
|
---|
| 578 | }
|
---|
| 579 |
|
---|
| 580 | /**
|
---|
[7277] | 581 | * internal: find image format backend.
|
---|
[2379] | 582 | */
|
---|
[14852] | 583 | static int vdFindBackend(const char *pszBackend, PCVBOXHDDBACKEND *ppBackend)
|
---|
[2379] | 584 | {
|
---|
[7277] | 585 | int rc = VINF_SUCCESS;
|
---|
| 586 | PCVBOXHDDBACKEND pBackend = NULL;
|
---|
| 587 |
|
---|
[14852] | 588 | if (!g_apBackends)
|
---|
| 589 | VDInit();
|
---|
| 590 |
|
---|
| 591 | for (unsigned i = 0; i < g_cBackends; i++)
|
---|
[7277] | 592 | {
|
---|
[15366] | 593 | if (!RTStrICmp(pszBackend, g_apBackends[i]->pszBackendName))
|
---|
[7277] | 594 | {
|
---|
[14852] | 595 | pBackend = g_apBackends[i];
|
---|
[7277] | 596 | break;
|
---|
| 597 | }
|
---|
| 598 | }
|
---|
| 599 | *ppBackend = pBackend;
|
---|
[2379] | 600 | return rc;
|
---|
| 601 | }
|
---|
| 602 |
|
---|
| 603 | /**
|
---|
[32370] | 604 | * internal: find cache format backend.
|
---|
| 605 | */
|
---|
| 606 | static int vdFindCacheBackend(const char *pszBackend, PCVDCACHEBACKEND *ppBackend)
|
---|
| 607 | {
|
---|
| 608 | int rc = VINF_SUCCESS;
|
---|
| 609 | PCVDCACHEBACKEND pBackend = NULL;
|
---|
| 610 |
|
---|
| 611 | if (!g_apCacheBackends)
|
---|
| 612 | VDInit();
|
---|
| 613 |
|
---|
| 614 | for (unsigned i = 0; i < g_cCacheBackends; i++)
|
---|
| 615 | {
|
---|
| 616 | if (!RTStrICmp(pszBackend, g_apCacheBackends[i]->pszBackendName))
|
---|
| 617 | {
|
---|
| 618 | pBackend = g_apCacheBackends[i];
|
---|
| 619 | break;
|
---|
| 620 | }
|
---|
| 621 | }
|
---|
| 622 | *ppBackend = pBackend;
|
---|
| 623 | return rc;
|
---|
| 624 | }
|
---|
| 625 |
|
---|
| 626 | /**
|
---|
[2379] | 627 | * internal: add image structure to the end of images list.
|
---|
| 628 | */
|
---|
[2590] | 629 | static void vdAddImageToList(PVBOXHDD pDisk, PVDIMAGE pImage)
|
---|
[2379] | 630 | {
|
---|
| 631 | pImage->pPrev = NULL;
|
---|
| 632 | pImage->pNext = NULL;
|
---|
| 633 |
|
---|
| 634 | if (pDisk->pBase)
|
---|
| 635 | {
|
---|
| 636 | Assert(pDisk->cImages > 0);
|
---|
| 637 | pImage->pPrev = pDisk->pLast;
|
---|
| 638 | pDisk->pLast->pNext = pImage;
|
---|
| 639 | pDisk->pLast = pImage;
|
---|
| 640 | }
|
---|
| 641 | else
|
---|
| 642 | {
|
---|
| 643 | Assert(pDisk->cImages == 0);
|
---|
| 644 | pDisk->pBase = pImage;
|
---|
| 645 | pDisk->pLast = pImage;
|
---|
| 646 | }
|
---|
| 647 |
|
---|
| 648 | pDisk->cImages++;
|
---|
| 649 | }
|
---|
| 650 |
|
---|
| 651 | /**
|
---|
| 652 | * internal: remove image structure from the images list.
|
---|
| 653 | */
|
---|
[2590] | 654 | static void vdRemoveImageFromList(PVBOXHDD pDisk, PVDIMAGE pImage)
|
---|
[2379] | 655 | {
|
---|
| 656 | Assert(pDisk->cImages > 0);
|
---|
| 657 |
|
---|
| 658 | if (pImage->pPrev)
|
---|
| 659 | pImage->pPrev->pNext = pImage->pNext;
|
---|
| 660 | else
|
---|
| 661 | pDisk->pBase = pImage->pNext;
|
---|
| 662 |
|
---|
| 663 | if (pImage->pNext)
|
---|
| 664 | pImage->pNext->pPrev = pImage->pPrev;
|
---|
| 665 | else
|
---|
| 666 | pDisk->pLast = pImage->pPrev;
|
---|
| 667 |
|
---|
| 668 | pImage->pPrev = NULL;
|
---|
| 669 | pImage->pNext = NULL;
|
---|
| 670 |
|
---|
| 671 | pDisk->cImages--;
|
---|
| 672 | }
|
---|
| 673 |
|
---|
| 674 | /**
|
---|
| 675 | * internal: find image by index into the images list.
|
---|
| 676 | */
|
---|
[26987] | 677 | static PVDIMAGE vdGetImageByNumber(PVBOXHDD pDisk, unsigned nImage)
|
---|
[2379] | 678 | {
|
---|
[2590] | 679 | PVDIMAGE pImage = pDisk->pBase;
|
---|
[6291] | 680 | if (nImage == VD_LAST_IMAGE)
|
---|
| 681 | return pDisk->pLast;
|
---|
[2379] | 682 | while (pImage && nImage)
|
---|
| 683 | {
|
---|
| 684 | pImage = pImage->pNext;
|
---|
| 685 | nImage--;
|
---|
| 686 | }
|
---|
| 687 | return pImage;
|
---|
| 688 | }
|
---|
| 689 |
|
---|
| 690 | /**
|
---|
[32370] | 691 | * Internal: Tries to read the desired range from the given cache.
|
---|
| 692 | *
|
---|
| 693 | * @returns VBox status code.
|
---|
| 694 | * @retval VERR_VD_BLOCK_FREE if the block is not in the cache.
|
---|
| 695 | * pcbRead will be set to the number of bytes not in the cache.
|
---|
| 696 | * Everything thereafter might be in the cache.
|
---|
| 697 | * @param pCache The cache to read from.
|
---|
| 698 | * @param uOffset Offset of the virtual disk to read.
|
---|
| 699 | * @param pvBuf Where to store the read data.
|
---|
| 700 | * @param cbRead How much to read.
|
---|
| 701 | * @param pcbRead Where to store the number of bytes actually read.
|
---|
| 702 | * On success this indicates the number of bytes read from the cache.
|
---|
| 703 | * If VERR_VD_BLOCK_FREE is returned this gives the number of bytes
|
---|
| 704 | * whih are not in the cache.
|
---|
| 705 | * In both cases everything beyond this value
|
---|
| 706 | * might or might not be in the cache.
|
---|
| 707 | */
|
---|
| 708 | static int vdCacheReadHelper(PVDCACHE pCache, uint64_t uOffset,
|
---|
| 709 | void *pvBuf, size_t cbRead, size_t *pcbRead)
|
---|
| 710 | {
|
---|
| 711 | int rc = VINF_SUCCESS;
|
---|
| 712 |
|
---|
| 713 | LogFlowFunc(("pCache=%#p uOffset=%llu pvBuf=%#p cbRead=%zu pcbRead=%#p\n",
|
---|
| 714 | pCache, uOffset, pvBuf, cbRead, pcbRead));
|
---|
| 715 |
|
---|
| 716 | AssertPtr(pCache);
|
---|
| 717 | AssertPtr(pcbRead);
|
---|
| 718 |
|
---|
[32536] | 719 | rc = pCache->Backend->pfnRead(pCache->pBackendData, uOffset, pvBuf,
|
---|
[32370] | 720 | cbRead, pcbRead);
|
---|
| 721 |
|
---|
| 722 | LogFlowFunc(("returns rc=%Rrc pcbRead=%zu\n", rc, *pcbRead));
|
---|
| 723 | return rc;
|
---|
| 724 | }
|
---|
| 725 |
|
---|
| 726 | /**
|
---|
| 727 | * Internal: Writes data for the given block into the cache.
|
---|
| 728 | *
|
---|
| 729 | * @returns VBox status code.
|
---|
| 730 | * @param pCache The cache to write to.
|
---|
| 731 | * @param uOffset Offset of the virtual disk to write to teh cache.
|
---|
| 732 | * @param pcvBuf The data to write.
|
---|
| 733 | * @param cbWrite How much to write.
|
---|
| 734 | * @param pcbWritten How much data could be written, optional.
|
---|
| 735 | */
|
---|
| 736 | static int vdCacheWriteHelper(PVDCACHE pCache, uint64_t uOffset, const void *pcvBuf,
|
---|
| 737 | size_t cbWrite, size_t *pcbWritten)
|
---|
| 738 | {
|
---|
| 739 | int rc = VINF_SUCCESS;
|
---|
| 740 |
|
---|
| 741 | LogFlowFunc(("pCache=%#p uOffset=%llu pvBuf=%#p cbWrite=%zu pcbWritten=%#p\n",
|
---|
| 742 | pCache, uOffset, pcvBuf, cbWrite, pcbWritten));
|
---|
| 743 |
|
---|
| 744 | AssertPtr(pCache);
|
---|
| 745 | AssertPtr(pcvBuf);
|
---|
| 746 | Assert(cbWrite > 0);
|
---|
| 747 |
|
---|
| 748 | if (pcbWritten)
|
---|
[32536] | 749 | rc = pCache->Backend->pfnWrite(pCache->pBackendData, uOffset, pcvBuf,
|
---|
[32370] | 750 | cbWrite, pcbWritten);
|
---|
| 751 | else
|
---|
| 752 | {
|
---|
| 753 | size_t cbWritten = 0;
|
---|
| 754 |
|
---|
| 755 | do
|
---|
| 756 | {
|
---|
[32536] | 757 | rc = pCache->Backend->pfnWrite(pCache->pBackendData, uOffset, pcvBuf,
|
---|
[32370] | 758 | cbWrite, &cbWritten);
|
---|
| 759 | uOffset += cbWritten;
|
---|
| 760 | pcvBuf = (char *)pcvBuf + cbWritten;
|
---|
| 761 | cbWrite -= cbWritten;
|
---|
| 762 | } while ( cbWrite
|
---|
| 763 | && RT_SUCCESS(rc));
|
---|
| 764 | }
|
---|
| 765 |
|
---|
| 766 | LogFlowFunc(("returns rc=%Rrc pcbWritten=%zu\n",
|
---|
| 767 | rc, pcbWritten ? *pcbWritten : cbWrite));
|
---|
| 768 | return rc;
|
---|
| 769 | }
|
---|
| 770 |
|
---|
| 771 | /**
|
---|
| 772 | * Internal: Reads a given amount of data from the image chain of the disk.
|
---|
| 773 | **/
|
---|
| 774 | static int vdDiskReadHelper(PVBOXHDD pDisk, PVDIMAGE pImage, PVDIMAGE pImageParentOverride,
|
---|
| 775 | uint64_t uOffset, void *pvBuf, size_t cbRead, size_t *pcbThisRead)
|
---|
| 776 | {
|
---|
| 777 | int rc = VINF_SUCCESS;
|
---|
| 778 | size_t cbThisRead = cbRead;
|
---|
| 779 |
|
---|
| 780 | AssertPtr(pcbThisRead);
|
---|
| 781 |
|
---|
| 782 | *pcbThisRead = 0;
|
---|
| 783 |
|
---|
| 784 | /*
|
---|
| 785 | * Try to read from the given image.
|
---|
| 786 | * If the block is not allocated read from override chain if present.
|
---|
| 787 | */
|
---|
[32536] | 788 | rc = pImage->Backend->pfnRead(pImage->pBackendData,
|
---|
[32370] | 789 | uOffset, pvBuf, cbThisRead,
|
---|
| 790 | &cbThisRead);
|
---|
| 791 |
|
---|
| 792 | if (rc == VERR_VD_BLOCK_FREE)
|
---|
| 793 | {
|
---|
| 794 | for (PVDIMAGE pCurrImage = pImageParentOverride ? pImageParentOverride : pImage->pPrev;
|
---|
| 795 | pCurrImage != NULL && rc == VERR_VD_BLOCK_FREE;
|
---|
| 796 | pCurrImage = pCurrImage->pPrev)
|
---|
| 797 | {
|
---|
[32536] | 798 | rc = pCurrImage->Backend->pfnRead(pCurrImage->pBackendData,
|
---|
[32370] | 799 | uOffset, pvBuf, cbThisRead,
|
---|
| 800 | &cbThisRead);
|
---|
| 801 | }
|
---|
| 802 | }
|
---|
| 803 |
|
---|
| 804 | if (RT_SUCCESS(rc))
|
---|
| 805 | *pcbThisRead = cbThisRead;
|
---|
| 806 |
|
---|
| 807 | return rc;
|
---|
| 808 | }
|
---|
| 809 |
|
---|
| 810 | /**
|
---|
[2379] | 811 | * internal: read the specified amount of data in whatever blocks the backend
|
---|
| 812 | * will give us.
|
---|
| 813 | */
|
---|
[27211] | 814 | static int vdReadHelper(PVBOXHDD pDisk, PVDIMAGE pImage, PVDIMAGE pImageParentOverride,
|
---|
[32370] | 815 | uint64_t uOffset, void *pvBuf, size_t cbRead,
|
---|
| 816 | bool fZeroFreeBlocks, bool fUpdateCache)
|
---|
[2379] | 817 | {
|
---|
[32370] | 818 | int rc = VINF_SUCCESS;
|
---|
[2379] | 819 | size_t cbThisRead;
|
---|
[30313] | 820 | bool fAllFree = true;
|
---|
| 821 | size_t cbBufClear = 0;
|
---|
[2379] | 822 |
|
---|
| 823 | /* Loop until all read. */
|
---|
| 824 | do
|
---|
| 825 | {
|
---|
| 826 | /* Search for image with allocated block. Do not attempt to read more
|
---|
| 827 | * than the previous reads marked as valid. Otherwise this would return
|
---|
| 828 | * stale data when different block sizes are used for the images. */
|
---|
| 829 | cbThisRead = cbRead;
|
---|
[27211] | 830 |
|
---|
[32370] | 831 | if ( pDisk->pCache
|
---|
| 832 | && !pImageParentOverride)
|
---|
| 833 | {
|
---|
| 834 | rc = vdCacheReadHelper(pDisk->pCache, uOffset, pvBuf,
|
---|
| 835 | cbThisRead, &cbThisRead);
|
---|
[27211] | 836 |
|
---|
[32370] | 837 | if (rc == VERR_VD_BLOCK_FREE)
|
---|
| 838 | {
|
---|
| 839 | rc = vdDiskReadHelper(pDisk, pImage, pImageParentOverride,
|
---|
| 840 | uOffset, pvBuf, cbThisRead, &cbThisRead);
|
---|
| 841 |
|
---|
| 842 | /* If the read was successful, write the data back into the cache. */
|
---|
| 843 | if ( RT_SUCCESS(rc)
|
---|
| 844 | && fUpdateCache)
|
---|
| 845 | {
|
---|
| 846 | rc = vdCacheWriteHelper(pDisk->pCache, uOffset, pvBuf,
|
---|
| 847 | cbThisRead, NULL);
|
---|
| 848 | }
|
---|
| 849 | }
|
---|
| 850 | }
|
---|
| 851 | else
|
---|
[2379] | 852 | {
|
---|
[32370] | 853 | /** @todo can be be replaced by vdDiskReadHelper if it proves to be reliable,
|
---|
| 854 | * don't want to be responsible for data corruption...
|
---|
| 855 | */
|
---|
| 856 | /*
|
---|
| 857 | * Try to read from the given image.
|
---|
| 858 | * If the block is not allocated read from override chain if present.
|
---|
| 859 | */
|
---|
[32536] | 860 | rc = pImage->Backend->pfnRead(pImage->pBackendData,
|
---|
[32370] | 861 | uOffset, pvBuf, cbThisRead,
|
---|
| 862 | &cbThisRead);
|
---|
| 863 |
|
---|
| 864 | if (rc == VERR_VD_BLOCK_FREE)
|
---|
[27211] | 865 | {
|
---|
[32370] | 866 | for (PVDIMAGE pCurrImage = pImageParentOverride ? pImageParentOverride : pImage->pPrev;
|
---|
| 867 | pCurrImage != NULL && rc == VERR_VD_BLOCK_FREE;
|
---|
| 868 | pCurrImage = pCurrImage->pPrev)
|
---|
| 869 | {
|
---|
[32536] | 870 | rc = pCurrImage->Backend->pfnRead(pCurrImage->pBackendData,
|
---|
[32370] | 871 | uOffset, pvBuf, cbThisRead,
|
---|
| 872 | &cbThisRead);
|
---|
| 873 | }
|
---|
[27211] | 874 | }
|
---|
[2379] | 875 | }
|
---|
| 876 |
|
---|
| 877 | /* No image in the chain contains the data for the block. */
|
---|
[15366] | 878 | if (rc == VERR_VD_BLOCK_FREE)
|
---|
[2379] | 879 | {
|
---|
[30481] | 880 | /* Fill the free space with 0 if we are told to do so
|
---|
| 881 | * or a previous read returned valid data. */
|
---|
[32370] | 882 | if (fZeroFreeBlocks || !fAllFree)
|
---|
[30313] | 883 | memset(pvBuf, '\0', cbThisRead);
|
---|
| 884 | else
|
---|
| 885 | cbBufClear += cbThisRead;
|
---|
| 886 |
|
---|
[2379] | 887 | rc = VINF_SUCCESS;
|
---|
| 888 | }
|
---|
[30313] | 889 | else if (RT_SUCCESS(rc))
|
---|
| 890 | {
|
---|
| 891 | /* First not free block, fill the space before with 0. */
|
---|
[32370] | 892 | if (!fZeroFreeBlocks)
|
---|
[30313] | 893 | {
|
---|
| 894 | memset((char *)pvBuf - cbBufClear, '\0', cbBufClear);
|
---|
| 895 | cbBufClear = 0;
|
---|
| 896 | fAllFree = false;
|
---|
| 897 | }
|
---|
| 898 | }
|
---|
[2379] | 899 |
|
---|
| 900 | cbRead -= cbThisRead;
|
---|
| 901 | uOffset += cbThisRead;
|
---|
| 902 | pvBuf = (char *)pvBuf + cbThisRead;
|
---|
[11266] | 903 | } while (cbRead != 0 && RT_SUCCESS(rc));
|
---|
[2379] | 904 |
|
---|
[32370] | 905 | return (!fZeroFreeBlocks && fAllFree) ? VERR_VD_BLOCK_FREE : rc;
|
---|
[2379] | 906 | }
|
---|
| 907 |
|
---|
[28065] | 908 | DECLINLINE(PVDIOCTX) vdIoCtxAlloc(PVBOXHDD pDisk, VDIOCTXTXDIR enmTxDir,
|
---|
| 909 | uint64_t uOffset, size_t cbTransfer,
|
---|
[28154] | 910 | PCRTSGSEG pcaSeg, unsigned cSeg,
|
---|
[28620] | 911 | void *pvAllocation,
|
---|
| 912 | PFNVDIOCTXTRANSFER pfnIoCtxTransfer)
|
---|
[27808] | 913 | {
|
---|
| 914 | PVDIOCTX pIoCtx = NULL;
|
---|
| 915 |
|
---|
| 916 | pIoCtx = (PVDIOCTX)RTMemCacheAlloc(pDisk->hMemCacheIoCtx);
|
---|
[28065] | 917 | if (RT_LIKELY(pIoCtx))
|
---|
[27808] | 918 | {
|
---|
[28065] | 919 | pIoCtx->pDisk = pDisk;
|
---|
| 920 | pIoCtx->enmTxDir = enmTxDir;
|
---|
| 921 | pIoCtx->cbTransferLeft = cbTransfer;
|
---|
| 922 | pIoCtx->uOffset = uOffset;
|
---|
[28620] | 923 | pIoCtx->cbTransfer = cbTransfer;
|
---|
[29240] | 924 | pIoCtx->cDataTransfersPending = 0;
|
---|
[27977] | 925 | pIoCtx->cMetaTransfersPending = 0;
|
---|
[28065] | 926 | pIoCtx->fComplete = false;
|
---|
[28683] | 927 | pIoCtx->fBlocked = false;
|
---|
[28154] | 928 | pIoCtx->pvAllocation = pvAllocation;
|
---|
[28620] | 929 | pIoCtx->pfnIoCtxTransfer = pfnIoCtxTransfer;
|
---|
| 930 | pIoCtx->pfnIoCtxTransferNext = NULL;
|
---|
[28785] | 931 | pIoCtx->rcReq = VINF_SUCCESS;
|
---|
[28065] | 932 |
|
---|
[29048] | 933 | /* There is no S/G list for a flush request. */
|
---|
| 934 | if (enmTxDir != VDIOCTXTXDIR_FLUSH)
|
---|
| 935 | RTSgBufInit(&pIoCtx->SgBuf, pcaSeg, cSeg);
|
---|
| 936 | else
|
---|
| 937 | memset(&pIoCtx->SgBuf, 0, sizeof(RTSGBUF));
|
---|
[27808] | 938 | }
|
---|
| 939 |
|
---|
| 940 | return pIoCtx;
|
---|
| 941 | }
|
---|
| 942 |
|
---|
[28620] | 943 | DECLINLINE(PVDIOCTX) vdIoCtxRootAlloc(PVBOXHDD pDisk, VDIOCTXTXDIR enmTxDir,
|
---|
| 944 | uint64_t uOffset, size_t cbTransfer,
|
---|
| 945 | PCRTSGSEG paSeg, unsigned cSeg,
|
---|
| 946 | PFNVDASYNCTRANSFERCOMPLETE pfnComplete,
|
---|
| 947 | void *pvUser1, void *pvUser2,
|
---|
| 948 | void *pvAllocation,
|
---|
| 949 | PFNVDIOCTXTRANSFER pfnIoCtxTransfer)
|
---|
[28065] | 950 | {
|
---|
| 951 | PVDIOCTX pIoCtx = vdIoCtxAlloc(pDisk, enmTxDir, uOffset, cbTransfer,
|
---|
[28620] | 952 | paSeg, cSeg, pvAllocation, pfnIoCtxTransfer);
|
---|
[28065] | 953 |
|
---|
| 954 | if (RT_LIKELY(pIoCtx))
|
---|
| 955 | {
|
---|
| 956 | pIoCtx->pIoCtxParent = NULL;
|
---|
| 957 | pIoCtx->Type.Root.pfnComplete = pfnComplete;
|
---|
| 958 | pIoCtx->Type.Root.pvUser1 = pvUser1;
|
---|
| 959 | pIoCtx->Type.Root.pvUser2 = pvUser2;
|
---|
| 960 | }
|
---|
| 961 |
|
---|
[30863] | 962 | LogFlow(("Allocated root I/O context %#p\n", pIoCtx));
|
---|
[28065] | 963 | return pIoCtx;
|
---|
| 964 | }
|
---|
| 965 |
|
---|
[28620] | 966 | DECLINLINE(PVDIOCTX) vdIoCtxChildAlloc(PVBOXHDD pDisk, VDIOCTXTXDIR enmTxDir,
|
---|
| 967 | uint64_t uOffset, size_t cbTransfer,
|
---|
| 968 | PCRTSGSEG paSeg, unsigned cSeg,
|
---|
| 969 | PVDIOCTX pIoCtxParent, size_t cbTransferParent,
|
---|
[30044] | 970 | size_t cbWriteParent, void *pvAllocation,
|
---|
[28620] | 971 | PFNVDIOCTXTRANSFER pfnIoCtxTransfer)
|
---|
[28065] | 972 | {
|
---|
| 973 | PVDIOCTX pIoCtx = vdIoCtxAlloc(pDisk, enmTxDir, uOffset, cbTransfer,
|
---|
[28620] | 974 | paSeg, cSeg, pvAllocation, pfnIoCtxTransfer);
|
---|
[28065] | 975 |
|
---|
[30555] | 976 | AssertPtr(pIoCtxParent);
|
---|
| 977 | Assert(!pIoCtxParent->pIoCtxParent);
|
---|
| 978 |
|
---|
[28065] | 979 | if (RT_LIKELY(pIoCtx))
|
---|
| 980 | {
|
---|
| 981 | pIoCtx->pIoCtxParent = pIoCtxParent;
|
---|
| 982 | pIoCtx->Type.Child.uOffsetSaved = uOffset;
|
---|
| 983 | pIoCtx->Type.Child.cbTransferLeftSaved = cbTransfer;
|
---|
| 984 | pIoCtx->Type.Child.cbTransferParent = cbTransferParent;
|
---|
[30044] | 985 | pIoCtx->Type.Child.cbWriteParent = cbWriteParent;
|
---|
[28065] | 986 | }
|
---|
| 987 |
|
---|
[30863] | 988 | LogFlow(("Allocated child I/O context %#p\n", pIoCtx));
|
---|
[28065] | 989 | return pIoCtx;
|
---|
| 990 | }
|
---|
| 991 |
|
---|
[30555] | 992 | DECLINLINE(PVDIOTASK) vdIoTaskUserAlloc(PVDIOSTORAGE pIoStorage, PFNVDXFERCOMPLETED pfnComplete, void *pvUser, PVDIOCTX pIoCtx, uint32_t cbTransfer)
|
---|
[27977] | 993 | {
|
---|
| 994 | PVDIOTASK pIoTask = NULL;
|
---|
| 995 |
|
---|
[30555] | 996 | pIoTask = (PVDIOTASK)RTMemCacheAlloc(pIoStorage->pImage->pDisk->hMemCacheIoTask);
|
---|
[27977] | 997 | if (pIoTask)
|
---|
| 998 | {
|
---|
[30555] | 999 | pIoTask->pIoStorage = pIoStorage;
|
---|
| 1000 | pIoTask->pfnComplete = pfnComplete;
|
---|
| 1001 | pIoTask->pvUser = pvUser;
|
---|
[27977] | 1002 | pIoTask->fMeta = false;
|
---|
| 1003 | pIoTask->Type.User.cbTransfer = cbTransfer;
|
---|
[30555] | 1004 | pIoTask->Type.User.pIoCtx = pIoCtx;
|
---|
[27977] | 1005 | }
|
---|
| 1006 |
|
---|
| 1007 | return pIoTask;
|
---|
| 1008 | }
|
---|
| 1009 |
|
---|
[30555] | 1010 | DECLINLINE(PVDIOTASK) vdIoTaskMetaAlloc(PVDIOSTORAGE pIoStorage, PFNVDXFERCOMPLETED pfnComplete, void *pvUser, PVDMETAXFER pMetaXfer)
|
---|
[27977] | 1011 | {
|
---|
| 1012 | PVDIOTASK pIoTask = NULL;
|
---|
| 1013 |
|
---|
[30555] | 1014 | pIoTask = (PVDIOTASK)RTMemCacheAlloc(pIoStorage->pImage->pDisk->hMemCacheIoTask);
|
---|
[27977] | 1015 | if (pIoTask)
|
---|
| 1016 | {
|
---|
[30555] | 1017 | pIoTask->pIoStorage = pIoStorage;
|
---|
| 1018 | pIoTask->pfnComplete = pfnComplete;
|
---|
| 1019 | pIoTask->pvUser = pvUser;
|
---|
| 1020 | pIoTask->fMeta = true;
|
---|
| 1021 | pIoTask->Type.Meta.pMetaXfer = pMetaXfer;
|
---|
[27977] | 1022 | }
|
---|
| 1023 |
|
---|
| 1024 | return pIoTask;
|
---|
| 1025 | }
|
---|
| 1026 |
|
---|
[28620] | 1027 | DECLINLINE(void) vdIoCtxFree(PVBOXHDD pDisk, PVDIOCTX pIoCtx)
|
---|
[27808] | 1028 | {
|
---|
[30863] | 1029 | LogFlow(("Freeing I/O context %#p\n", pIoCtx));
|
---|
[28154] | 1030 | if (pIoCtx->pvAllocation)
|
---|
| 1031 | RTMemFree(pIoCtx->pvAllocation);
|
---|
[30863] | 1032 | #ifdef DEBUG
|
---|
| 1033 | memset(pIoCtx, 0xff, sizeof(VDIOCTX));
|
---|
| 1034 | #endif
|
---|
[27808] | 1035 | RTMemCacheFree(pDisk->hMemCacheIoCtx, pIoCtx);
|
---|
| 1036 | }
|
---|
| 1037 |
|
---|
[28620] | 1038 | DECLINLINE(void) vdIoTaskFree(PVBOXHDD pDisk, PVDIOTASK pIoTask)
|
---|
[27977] | 1039 | {
|
---|
| 1040 | RTMemCacheFree(pDisk->hMemCacheIoTask, pIoTask);
|
---|
| 1041 | }
|
---|
| 1042 |
|
---|
[28620] | 1043 | DECLINLINE(void) vdIoCtxChildReset(PVDIOCTX pIoCtx)
|
---|
[27808] | 1044 | {
|
---|
[28065] | 1045 | AssertPtr(pIoCtx->pIoCtxParent);
|
---|
[27808] | 1046 |
|
---|
[28065] | 1047 | RTSgBufReset(&pIoCtx->SgBuf);
|
---|
| 1048 | pIoCtx->uOffset = pIoCtx->Type.Child.uOffsetSaved;
|
---|
| 1049 | pIoCtx->cbTransferLeft = pIoCtx->Type.Child.cbTransferLeftSaved;
|
---|
| 1050 | }
|
---|
[27808] | 1051 |
|
---|
[30555] | 1052 | DECLINLINE(PVDMETAXFER) vdMetaXferAlloc(PVDIMAGE pImage, PVDIOSTORAGE pIoStorage, uint64_t uOffset, size_t cb)
|
---|
| 1053 | {
|
---|
| 1054 | PVDMETAXFER pMetaXfer = (PVDMETAXFER)RTMemAlloc(RT_OFFSETOF(VDMETAXFER, abData[cb]));
|
---|
| 1055 |
|
---|
| 1056 | if (RT_LIKELY(pMetaXfer))
|
---|
| 1057 | {
|
---|
| 1058 | pMetaXfer->Core.Key = uOffset;
|
---|
| 1059 | pMetaXfer->Core.KeyLast = uOffset + cb - 1;
|
---|
| 1060 | pMetaXfer->fFlags = VDMETAXFER_TXDIR_NONE;
|
---|
| 1061 | pMetaXfer->cbMeta = cb;
|
---|
| 1062 | pMetaXfer->pIoStorage = pIoStorage;
|
---|
| 1063 | pMetaXfer->cRefs = 0;
|
---|
| 1064 | RTListInit(&pMetaXfer->ListIoCtxWaiting);
|
---|
| 1065 | }
|
---|
| 1066 | return pMetaXfer;
|
---|
| 1067 | }
|
---|
| 1068 |
|
---|
[28065] | 1069 | static size_t vdIoCtxCopy(PVDIOCTX pIoCtxDst, PVDIOCTX pIoCtxSrc, size_t cbData)
|
---|
| 1070 | {
|
---|
| 1071 | return RTSgBufCopy(&pIoCtxDst->SgBuf, &pIoCtxSrc->SgBuf, cbData);
|
---|
| 1072 | }
|
---|
[27808] | 1073 |
|
---|
[28065] | 1074 | static int vdIoCtxCmp(PVDIOCTX pIoCtx1, PVDIOCTX pIoCtx2, size_t cbData)
|
---|
| 1075 | {
|
---|
| 1076 | return RTSgBufCmp(&pIoCtx1->SgBuf, &pIoCtx2->SgBuf, cbData);
|
---|
[27808] | 1077 | }
|
---|
| 1078 |
|
---|
| 1079 | static size_t vdIoCtxCopyTo(PVDIOCTX pIoCtx, uint8_t *pbData, size_t cbData)
|
---|
| 1080 | {
|
---|
[28065] | 1081 | return RTSgBufCopyToBuf(&pIoCtx->SgBuf, pbData, cbData);
|
---|
[27808] | 1082 | }
|
---|
| 1083 |
|
---|
| 1084 |
|
---|
| 1085 | static size_t vdIoCtxCopyFrom(PVDIOCTX pIoCtx, uint8_t *pbData, size_t cbData)
|
---|
| 1086 | {
|
---|
[28065] | 1087 | return RTSgBufCopyFromBuf(&pIoCtx->SgBuf, pbData, cbData);
|
---|
[27808] | 1088 | }
|
---|
| 1089 |
|
---|
[28065] | 1090 | static size_t vdIoCtxSet(PVDIOCTX pIoCtx, uint8_t ch, size_t cbData)
|
---|
[27808] | 1091 | {
|
---|
[28065] | 1092 | return RTSgBufSet(&pIoCtx->SgBuf, ch, cbData);
|
---|
[27808] | 1093 | }
|
---|
| 1094 |
|
---|
[28620] | 1095 | static int vdIoCtxProcess(PVDIOCTX pIoCtx)
|
---|
| 1096 | {
|
---|
| 1097 | int rc = VINF_SUCCESS;
|
---|
| 1098 | PVBOXHDD pDisk = pIoCtx->pDisk;
|
---|
| 1099 |
|
---|
[28704] | 1100 | LogFlowFunc(("pIoCtx=%#p\n", pIoCtx));
|
---|
[28693] | 1101 |
|
---|
[30863] | 1102 | RTCritSectEnter(&pDisk->CritSect);
|
---|
| 1103 |
|
---|
[28620] | 1104 | if ( !pIoCtx->cbTransferLeft
|
---|
[28693] | 1105 | && !pIoCtx->cMetaTransfersPending
|
---|
[29240] | 1106 | && !pIoCtx->cDataTransfersPending
|
---|
[28693] | 1107 | && !pIoCtx->pfnIoCtxTransfer)
|
---|
[30863] | 1108 | {
|
---|
| 1109 | rc = VINF_VD_ASYNC_IO_FINISHED;
|
---|
| 1110 | goto out;
|
---|
| 1111 | }
|
---|
[28620] | 1112 |
|
---|
[29240] | 1113 | /*
|
---|
| 1114 | * We complete the I/O context in case of an error
|
---|
| 1115 | * if there is no I/O task pending.
|
---|
| 1116 | */
|
---|
| 1117 | if ( RT_FAILURE(pIoCtx->rcReq)
|
---|
| 1118 | && !pIoCtx->cMetaTransfersPending
|
---|
| 1119 | && !pIoCtx->cDataTransfersPending)
|
---|
[30863] | 1120 | {
|
---|
| 1121 | rc = VINF_VD_ASYNC_IO_FINISHED;
|
---|
| 1122 | goto out;
|
---|
| 1123 | }
|
---|
[29240] | 1124 |
|
---|
[30863] | 1125 | /* Don't change anything if there is a metadata transfer pending or we are blocked. */
|
---|
| 1126 | if ( pIoCtx->cMetaTransfersPending
|
---|
| 1127 | || pIoCtx->fBlocked)
|
---|
| 1128 | {
|
---|
| 1129 | rc = VERR_VD_ASYNC_IO_IN_PROGRESS;
|
---|
| 1130 | goto out;
|
---|
| 1131 | }
|
---|
[30555] | 1132 |
|
---|
[28620] | 1133 | if (pIoCtx->pfnIoCtxTransfer)
|
---|
| 1134 | {
|
---|
| 1135 | /* Call the transfer function advancing to the next while there is no error. */
|
---|
| 1136 | while ( pIoCtx->pfnIoCtxTransfer
|
---|
| 1137 | && RT_SUCCESS(rc))
|
---|
| 1138 | {
|
---|
[28693] | 1139 | LogFlowFunc(("calling transfer function %#p\n", pIoCtx->pfnIoCtxTransfer));
|
---|
[28620] | 1140 | rc = pIoCtx->pfnIoCtxTransfer(pIoCtx);
|
---|
| 1141 |
|
---|
| 1142 | /* Advance to the next part of the transfer if the current one succeeded. */
|
---|
| 1143 | if (RT_SUCCESS(rc))
|
---|
| 1144 | {
|
---|
| 1145 | pIoCtx->pfnIoCtxTransfer = pIoCtx->pfnIoCtxTransferNext;
|
---|
| 1146 | pIoCtx->pfnIoCtxTransferNext = NULL;
|
---|
| 1147 | }
|
---|
| 1148 | }
|
---|
| 1149 | }
|
---|
| 1150 |
|
---|
| 1151 | if ( RT_SUCCESS(rc)
|
---|
| 1152 | && !pIoCtx->cbTransferLeft
|
---|
[29240] | 1153 | && !pIoCtx->cMetaTransfersPending
|
---|
| 1154 | && !pIoCtx->cDataTransfersPending)
|
---|
[28620] | 1155 | rc = VINF_VD_ASYNC_IO_FINISHED;
|
---|
[31586] | 1156 | else if ( RT_SUCCESS(rc)
|
---|
| 1157 | || rc == VERR_VD_NOT_ENOUGH_METADATA
|
---|
| 1158 | || rc == VERR_VD_IOCTX_HALT)
|
---|
[28620] | 1159 | rc = VERR_VD_ASYNC_IO_IN_PROGRESS;
|
---|
[29244] | 1160 | else if (RT_FAILURE(rc) && (rc != VERR_VD_ASYNC_IO_IN_PROGRESS))
|
---|
[29240] | 1161 | {
|
---|
| 1162 | ASMAtomicCmpXchgS32(&pIoCtx->rcReq, rc, VINF_SUCCESS);
|
---|
| 1163 | /*
|
---|
| 1164 | * The I/O context completed if we have an error and there is no data
|
---|
| 1165 | * or meta data transfer pending.
|
---|
| 1166 | */
|
---|
| 1167 | if ( !pIoCtx->cMetaTransfersPending
|
---|
| 1168 | && !pIoCtx->cDataTransfersPending)
|
---|
| 1169 | rc = VINF_VD_ASYNC_IO_FINISHED;
|
---|
[29244] | 1170 | else
|
---|
| 1171 | rc = VERR_VD_ASYNC_IO_IN_PROGRESS;
|
---|
[29240] | 1172 | }
|
---|
[28620] | 1173 |
|
---|
[30863] | 1174 | out:
|
---|
| 1175 | RTCritSectLeave(&pDisk->CritSect);
|
---|
| 1176 |
|
---|
[28620] | 1177 | LogFlowFunc(("pIoCtx=%#p rc=%Rrc cbTransferLeft=%u cMetaTransfersPending=%u fComplete=%RTbool\n",
|
---|
| 1178 | pIoCtx, rc, pIoCtx->cbTransferLeft, pIoCtx->cMetaTransfersPending,
|
---|
| 1179 | pIoCtx->fComplete));
|
---|
| 1180 |
|
---|
| 1181 | return rc;
|
---|
| 1182 | }
|
---|
| 1183 |
|
---|
[2379] | 1184 | /**
|
---|
[27808] | 1185 | * internal: read the specified amount of data in whatever blocks the backend
|
---|
| 1186 | * will give us - async version.
|
---|
| 1187 | */
|
---|
[28620] | 1188 | static int vdReadHelperAsync(PVDIOCTX pIoCtx)
|
---|
[27808] | 1189 | {
|
---|
| 1190 | int rc;
|
---|
[28620] | 1191 | size_t cbToRead = pIoCtx->cbTransfer;
|
---|
| 1192 | uint64_t uOffset = pIoCtx->uOffset;
|
---|
| 1193 | PVDIMAGE pCurrImage = NULL;
|
---|
[27808] | 1194 | size_t cbThisRead;
|
---|
| 1195 |
|
---|
| 1196 | /* Loop until all reads started or we have a backend which needs to read metadata. */
|
---|
| 1197 | do
|
---|
| 1198 | {
|
---|
[28620] | 1199 | pCurrImage = pIoCtx->pImage;
|
---|
| 1200 |
|
---|
[27808] | 1201 | /* Search for image with allocated block. Do not attempt to read more
|
---|
| 1202 | * than the previous reads marked as valid. Otherwise this would return
|
---|
| 1203 | * stale data when different block sizes are used for the images. */
|
---|
[28620] | 1204 | cbThisRead = cbToRead;
|
---|
[27808] | 1205 |
|
---|
| 1206 | /*
|
---|
| 1207 | * Try to read from the given image.
|
---|
| 1208 | * If the block is not allocated read from override chain if present.
|
---|
| 1209 | */
|
---|
[32536] | 1210 | rc = pCurrImage->Backend->pfnAsyncRead(pCurrImage->pBackendData,
|
---|
[28620] | 1211 | uOffset, cbThisRead,
|
---|
| 1212 | pIoCtx, &cbThisRead);
|
---|
[27808] | 1213 |
|
---|
| 1214 | if (rc == VERR_VD_BLOCK_FREE)
|
---|
| 1215 | {
|
---|
[28620] | 1216 | for (pCurrImage = pCurrImage->pPrev;
|
---|
[27808] | 1217 | pCurrImage != NULL && rc == VERR_VD_BLOCK_FREE;
|
---|
| 1218 | pCurrImage = pCurrImage->pPrev)
|
---|
| 1219 | {
|
---|
[32536] | 1220 | rc = pCurrImage->Backend->pfnAsyncRead(pCurrImage->pBackendData,
|
---|
[27808] | 1221 | uOffset, cbThisRead,
|
---|
| 1222 | pIoCtx, &cbThisRead);
|
---|
| 1223 | }
|
---|
| 1224 | }
|
---|
| 1225 |
|
---|
[31573] | 1226 | /* The task state will be updated on success already, don't do it here!. */
|
---|
| 1227 | if (rc == VERR_VD_BLOCK_FREE)
|
---|
[27808] | 1228 | {
|
---|
| 1229 | /* No image in the chain contains the data for the block. */
|
---|
| 1230 | vdIoCtxSet(pIoCtx, '\0', cbThisRead);
|
---|
[28065] | 1231 | ASMAtomicSubU32(&pIoCtx->cbTransferLeft, cbThisRead);
|
---|
[27808] | 1232 | rc = VINF_SUCCESS;
|
---|
| 1233 | }
|
---|
[30555] | 1234 | else if (rc == VERR_VD_ASYNC_IO_IN_PROGRESS)
|
---|
| 1235 | rc = VINF_SUCCESS;
|
---|
[31586] | 1236 | else if (rc == VERR_VD_IOCTX_HALT)
|
---|
| 1237 | {
|
---|
| 1238 | uOffset += cbThisRead;
|
---|
| 1239 | cbToRead -= cbThisRead;
|
---|
| 1240 | pIoCtx->fBlocked = true;
|
---|
| 1241 | }
|
---|
[27808] | 1242 |
|
---|
[28065] | 1243 | if (RT_FAILURE(rc))
|
---|
| 1244 | break;
|
---|
[27808] | 1245 |
|
---|
[28620] | 1246 | cbToRead -= cbThisRead;
|
---|
| 1247 | uOffset += cbThisRead;
|
---|
| 1248 | } while (cbToRead != 0 && RT_SUCCESS(rc));
|
---|
[27808] | 1249 |
|
---|
[31586] | 1250 | if ( rc == VERR_VD_NOT_ENOUGH_METADATA
|
---|
| 1251 | || rc == VERR_VD_IOCTX_HALT)
|
---|
[27808] | 1252 | {
|
---|
[28620] | 1253 | /* Save the current state. */
|
---|
| 1254 | pIoCtx->uOffset = uOffset;
|
---|
| 1255 | pIoCtx->cbTransfer = cbToRead;
|
---|
| 1256 | pIoCtx->pImage = pCurrImage;
|
---|
[27808] | 1257 | }
|
---|
| 1258 |
|
---|
| 1259 | return rc;
|
---|
| 1260 | }
|
---|
| 1261 |
|
---|
| 1262 | /**
|
---|
[19176] | 1263 | * internal: parent image read wrapper for compacting.
|
---|
| 1264 | */
|
---|
| 1265 | static int vdParentRead(void *pvUser, uint64_t uOffset, void *pvBuf,
|
---|
| 1266 | size_t cbRead)
|
---|
| 1267 | {
|
---|
| 1268 | PVDPARENTSTATEDESC pParentState = (PVDPARENTSTATEDESC)pvUser;
|
---|
[27211] | 1269 | return vdReadHelper(pParentState->pDisk, pParentState->pImage, NULL, uOffset,
|
---|
[32370] | 1270 | pvBuf, cbRead, true /* fZeroFreeBlocks */,
|
---|
| 1271 | false /* fUpdateCache */);
|
---|
[19176] | 1272 | }
|
---|
| 1273 |
|
---|
| 1274 | /**
|
---|
[2379] | 1275 | * internal: mark the disk as not modified.
|
---|
| 1276 | */
|
---|
| 1277 | static void vdResetModifiedFlag(PVBOXHDD pDisk)
|
---|
| 1278 | {
|
---|
| 1279 | if (pDisk->uModified & VD_IMAGE_MODIFIED_FLAG)
|
---|
| 1280 | {
|
---|
| 1281 | /* generate new last-modified uuid */
|
---|
[7900] | 1282 | if (!(pDisk->uModified & VD_IMAGE_MODIFIED_DISABLE_UUID_UPDATE))
|
---|
[2379] | 1283 | {
|
---|
| 1284 | RTUUID Uuid;
|
---|
| 1285 |
|
---|
| 1286 | RTUuidCreate(&Uuid);
|
---|
[32536] | 1287 | pDisk->pLast->Backend->pfnSetModificationUuid(pDisk->pLast->pBackendData,
|
---|
[7277] | 1288 | &Uuid);
|
---|
[32370] | 1289 |
|
---|
| 1290 | if (pDisk->pCache)
|
---|
[32536] | 1291 | pDisk->pCache->Backend->pfnSetModificationUuid(pDisk->pCache->pBackendData,
|
---|
[32370] | 1292 | &Uuid);
|
---|
[2379] | 1293 | }
|
---|
| 1294 |
|
---|
| 1295 | pDisk->uModified &= ~VD_IMAGE_MODIFIED_FLAG;
|
---|
| 1296 | }
|
---|
| 1297 | }
|
---|
| 1298 |
|
---|
| 1299 | /**
|
---|
| 1300 | * internal: mark the disk as modified.
|
---|
| 1301 | */
|
---|
[26987] | 1302 | static void vdSetModifiedFlag(PVBOXHDD pDisk)
|
---|
[2379] | 1303 | {
|
---|
| 1304 | pDisk->uModified |= VD_IMAGE_MODIFIED_FLAG;
|
---|
| 1305 | if (pDisk->uModified & VD_IMAGE_MODIFIED_FIRST)
|
---|
| 1306 | {
|
---|
| 1307 | pDisk->uModified &= ~VD_IMAGE_MODIFIED_FIRST;
|
---|
| 1308 |
|
---|
| 1309 | /* First modify, so create a UUID and ensure it's written to disk. */
|
---|
| 1310 | vdResetModifiedFlag(pDisk);
|
---|
| 1311 |
|
---|
[32370] | 1312 | if (!(pDisk->uModified & VD_IMAGE_MODIFIED_DISABLE_UUID_UPDATE))
|
---|
[32536] | 1313 | pDisk->pLast->Backend->pfnFlush(pDisk->pLast->pBackendData);
|
---|
[2379] | 1314 | }
|
---|
| 1315 | }
|
---|
| 1316 |
|
---|
| 1317 | /**
|
---|
[2590] | 1318 | * internal: write a complete block (only used for diff images), taking the
|
---|
| 1319 | * remaining data from parent images. This implementation does not optimize
|
---|
| 1320 | * anything (except that it tries to read only that portions from parent
|
---|
| 1321 | * images that are really needed).
|
---|
| 1322 | */
|
---|
| 1323 | static int vdWriteHelperStandard(PVBOXHDD pDisk, PVDIMAGE pImage,
|
---|
[27211] | 1324 | PVDIMAGE pImageParentOverride,
|
---|
[2590] | 1325 | uint64_t uOffset, size_t cbWrite,
|
---|
| 1326 | size_t cbThisWrite, size_t cbPreRead,
|
---|
| 1327 | size_t cbPostRead, const void *pvBuf,
|
---|
| 1328 | void *pvTmp)
|
---|
| 1329 | {
|
---|
[2742] | 1330 | int rc = VINF_SUCCESS;
|
---|
[2590] | 1331 |
|
---|
| 1332 | /* Read the data that goes before the write to fill the block. */
|
---|
| 1333 | if (cbPreRead)
|
---|
| 1334 | {
|
---|
[32370] | 1335 | /*
|
---|
| 1336 | * Updating the cache doesn't make sense here because
|
---|
| 1337 | * this will be done after the complete block was written.
|
---|
| 1338 | */
|
---|
[27211] | 1339 | rc = vdReadHelper(pDisk, pImage, pImageParentOverride,
|
---|
[32370] | 1340 | uOffset - cbPreRead, pvTmp, cbPreRead,
|
---|
| 1341 | true /* fZeroFreeBlocks*/,
|
---|
| 1342 | false /* fUpdateCache */);
|
---|
[11266] | 1343 | if (RT_FAILURE(rc))
|
---|
[2590] | 1344 | return rc;
|
---|
| 1345 | }
|
---|
| 1346 |
|
---|
| 1347 | /* Copy the data to the right place in the buffer. */
|
---|
| 1348 | memcpy((char *)pvTmp + cbPreRead, pvBuf, cbThisWrite);
|
---|
| 1349 |
|
---|
| 1350 | /* Read the data that goes after the write to fill the block. */
|
---|
| 1351 | if (cbPostRead)
|
---|
| 1352 | {
|
---|
| 1353 | /* If we have data to be written, use that instead of reading
|
---|
| 1354 | * data from the image. */
|
---|
| 1355 | size_t cbWriteCopy;
|
---|
| 1356 | if (cbWrite > cbThisWrite)
|
---|
| 1357 | cbWriteCopy = RT_MIN(cbWrite - cbThisWrite, cbPostRead);
|
---|
| 1358 | else
|
---|
| 1359 | cbWriteCopy = 0;
|
---|
| 1360 | /* Figure out how much we cannnot read from the image, because
|
---|
| 1361 | * the last block to write might exceed the nominal size of the
|
---|
| 1362 | * image for technical reasons. */
|
---|
| 1363 | size_t cbFill;
|
---|
| 1364 | if (uOffset + cbThisWrite + cbPostRead > pDisk->cbSize)
|
---|
| 1365 | cbFill = uOffset + cbThisWrite + cbPostRead - pDisk->cbSize;
|
---|
| 1366 | else
|
---|
| 1367 | cbFill = 0;
|
---|
| 1368 | /* The rest must be read from the image. */
|
---|
| 1369 | size_t cbReadImage = cbPostRead - cbWriteCopy - cbFill;
|
---|
| 1370 |
|
---|
| 1371 | /* Now assemble the remaining data. */
|
---|
| 1372 | if (cbWriteCopy)
|
---|
| 1373 | memcpy((char *)pvTmp + cbPreRead + cbThisWrite,
|
---|
| 1374 | (char *)pvBuf + cbThisWrite, cbWriteCopy);
|
---|
| 1375 | if (cbReadImage)
|
---|
[27211] | 1376 | rc = vdReadHelper(pDisk, pImage, pImageParentOverride,
|
---|
[2590] | 1377 | uOffset + cbThisWrite + cbWriteCopy,
|
---|
| 1378 | (char *)pvTmp + cbPreRead + cbThisWrite + cbWriteCopy,
|
---|
[32370] | 1379 | cbReadImage, true /* fZeroFreeBlocks */,
|
---|
| 1380 | false /* fUpdateCache */);
|
---|
[11266] | 1381 | if (RT_FAILURE(rc))
|
---|
[2590] | 1382 | return rc;
|
---|
| 1383 | /* Zero out the remainder of this block. Will never be visible, as this
|
---|
| 1384 | * is beyond the limit of the image. */
|
---|
| 1385 | if (cbFill)
|
---|
| 1386 | memset((char *)pvTmp + cbPreRead + cbThisWrite + cbWriteCopy + cbReadImage,
|
---|
| 1387 | '\0', cbFill);
|
---|
| 1388 | }
|
---|
| 1389 |
|
---|
| 1390 | /* Write the full block to the virtual disk. */
|
---|
[32536] | 1391 | rc = pImage->Backend->pfnWrite(pImage->pBackendData,
|
---|
[7277] | 1392 | uOffset - cbPreRead, pvTmp,
|
---|
| 1393 | cbPreRead + cbThisWrite + cbPostRead,
|
---|
[7780] | 1394 | NULL, &cbPreRead, &cbPostRead, 0);
|
---|
[15366] | 1395 | Assert(rc != VERR_VD_BLOCK_FREE);
|
---|
[2590] | 1396 | Assert(cbPreRead == 0);
|
---|
| 1397 | Assert(cbPostRead == 0);
|
---|
| 1398 |
|
---|
| 1399 | return rc;
|
---|
| 1400 | }
|
---|
| 1401 |
|
---|
| 1402 | /**
|
---|
| 1403 | * internal: write a complete block (only used for diff images), taking the
|
---|
[7900] | 1404 | * remaining data from parent images. This implementation optimizes out writes
|
---|
[2590] | 1405 | * that do not change the data relative to the state as of the parent images.
|
---|
| 1406 | * All backends which support differential/growing images support this.
|
---|
| 1407 | */
|
---|
| 1408 | static int vdWriteHelperOptimized(PVBOXHDD pDisk, PVDIMAGE pImage,
|
---|
[27211] | 1409 | PVDIMAGE pImageParentOverride,
|
---|
[2590] | 1410 | uint64_t uOffset, size_t cbWrite,
|
---|
| 1411 | size_t cbThisWrite, size_t cbPreRead,
|
---|
| 1412 | size_t cbPostRead, const void *pvBuf,
|
---|
| 1413 | void *pvTmp)
|
---|
| 1414 | {
|
---|
| 1415 | size_t cbFill = 0;
|
---|
| 1416 | size_t cbWriteCopy = 0;
|
---|
| 1417 | size_t cbReadImage = 0;
|
---|
| 1418 | int rc;
|
---|
| 1419 |
|
---|
| 1420 | if (cbPostRead)
|
---|
| 1421 | {
|
---|
| 1422 | /* Figure out how much we cannnot read from the image, because
|
---|
| 1423 | * the last block to write might exceed the nominal size of the
|
---|
| 1424 | * image for technical reasons. */
|
---|
| 1425 | if (uOffset + cbThisWrite + cbPostRead > pDisk->cbSize)
|
---|
| 1426 | cbFill = uOffset + cbThisWrite + cbPostRead - pDisk->cbSize;
|
---|
| 1427 |
|
---|
| 1428 | /* If we have data to be written, use that instead of reading
|
---|
| 1429 | * data from the image. */
|
---|
| 1430 | if (cbWrite > cbThisWrite)
|
---|
| 1431 | cbWriteCopy = RT_MIN(cbWrite - cbThisWrite, cbPostRead);
|
---|
| 1432 |
|
---|
| 1433 | /* The rest must be read from the image. */
|
---|
| 1434 | cbReadImage = cbPostRead - cbWriteCopy - cbFill;
|
---|
| 1435 | }
|
---|
| 1436 |
|
---|
| 1437 | /* Read the entire data of the block so that we can compare whether it will
|
---|
| 1438 | * be modified by the write or not. */
|
---|
[27211] | 1439 | rc = vdReadHelper(pDisk, pImage, pImageParentOverride, uOffset - cbPreRead, pvTmp,
|
---|
[32370] | 1440 | cbPreRead + cbThisWrite + cbPostRead - cbFill,
|
---|
| 1441 | true /* fZeroFreeBlocks */,
|
---|
| 1442 | false /* fUpdateCache */);
|
---|
[11266] | 1443 | if (RT_FAILURE(rc))
|
---|
[2590] | 1444 | return rc;
|
---|
| 1445 |
|
---|
| 1446 | /* Check if the write would modify anything in this block. */
|
---|
| 1447 | if ( !memcmp((char *)pvTmp + cbPreRead, pvBuf, cbThisWrite)
|
---|
| 1448 | && (!cbWriteCopy || !memcmp((char *)pvTmp + cbPreRead + cbThisWrite,
|
---|
| 1449 | (char *)pvBuf + cbThisWrite, cbWriteCopy)))
|
---|
| 1450 | {
|
---|
| 1451 | /* Block is completely unchanged, so no need to write anything. */
|
---|
| 1452 | return VINF_SUCCESS;
|
---|
| 1453 | }
|
---|
| 1454 |
|
---|
| 1455 | /* Copy the data to the right place in the buffer. */
|
---|
| 1456 | memcpy((char *)pvTmp + cbPreRead, pvBuf, cbThisWrite);
|
---|
| 1457 |
|
---|
| 1458 | /* Handle the data that goes after the write to fill the block. */
|
---|
| 1459 | if (cbPostRead)
|
---|
| 1460 | {
|
---|
| 1461 | /* Now assemble the remaining data. */
|
---|
| 1462 | if (cbWriteCopy)
|
---|
| 1463 | memcpy((char *)pvTmp + cbPreRead + cbThisWrite,
|
---|
| 1464 | (char *)pvBuf + cbThisWrite, cbWriteCopy);
|
---|
| 1465 | /* Zero out the remainder of this block. Will never be visible, as this
|
---|
| 1466 | * is beyond the limit of the image. */
|
---|
| 1467 | if (cbFill)
|
---|
| 1468 | memset((char *)pvTmp + cbPreRead + cbThisWrite + cbWriteCopy + cbReadImage,
|
---|
| 1469 | '\0', cbFill);
|
---|
| 1470 | }
|
---|
| 1471 |
|
---|
| 1472 | /* Write the full block to the virtual disk. */
|
---|
[32536] | 1473 | rc = pImage->Backend->pfnWrite(pImage->pBackendData,
|
---|
[7277] | 1474 | uOffset - cbPreRead, pvTmp,
|
---|
| 1475 | cbPreRead + cbThisWrite + cbPostRead,
|
---|
[7780] | 1476 | NULL, &cbPreRead, &cbPostRead, 0);
|
---|
[15366] | 1477 | Assert(rc != VERR_VD_BLOCK_FREE);
|
---|
[2590] | 1478 | Assert(cbPreRead == 0);
|
---|
| 1479 | Assert(cbPostRead == 0);
|
---|
| 1480 |
|
---|
| 1481 | return rc;
|
---|
| 1482 | }
|
---|
| 1483 |
|
---|
| 1484 | /**
|
---|
[6291] | 1485 | * internal: write buffer to the image, taking care of block boundaries and
|
---|
| 1486 | * write optimizations.
|
---|
| 1487 | */
|
---|
[27211] | 1488 | static int vdWriteHelper(PVBOXHDD pDisk, PVDIMAGE pImage, PVDIMAGE pImageParentOverride,
|
---|
[32370] | 1489 | uint64_t uOffset, const void *pvBuf, size_t cbWrite,
|
---|
| 1490 | bool fUpdateCache)
|
---|
[6291] | 1491 | {
|
---|
| 1492 | int rc;
|
---|
[7900] | 1493 | unsigned fWrite;
|
---|
[6291] | 1494 | size_t cbThisWrite;
|
---|
| 1495 | size_t cbPreRead, cbPostRead;
|
---|
[32370] | 1496 | uint64_t uOffsetCur = uOffset;
|
---|
| 1497 | size_t cbWriteCur = cbWrite;
|
---|
| 1498 | const void *pcvBufCur = pvBuf;
|
---|
[6291] | 1499 |
|
---|
| 1500 | /* Loop until all written. */
|
---|
| 1501 | do
|
---|
| 1502 | {
|
---|
| 1503 | /* Try to write the possibly partial block to the last opened image.
|
---|
| 1504 | * This works when the block is already allocated in this image or
|
---|
[7900] | 1505 | * if it is a full-block write (and allocation isn't suppressed below).
|
---|
| 1506 | * For image formats which don't support zero blocks, it's beneficial
|
---|
| 1507 | * to avoid unnecessarily allocating unchanged blocks. This prevents
|
---|
| 1508 | * unwanted expanding of images. VMDK is an example. */
|
---|
[32370] | 1509 | cbThisWrite = cbWriteCur;
|
---|
[7900] | 1510 | fWrite = (pImage->uOpenFlags & VD_OPEN_FLAGS_HONOR_SAME)
|
---|
| 1511 | ? 0 : VD_WRITE_NO_ALLOC;
|
---|
[32536] | 1512 | rc = pImage->Backend->pfnWrite(pImage->pBackendData, uOffsetCur, pcvBufCur,
|
---|
[7277] | 1513 | cbThisWrite, &cbThisWrite, &cbPreRead,
|
---|
[7900] | 1514 | &cbPostRead, fWrite);
|
---|
[15366] | 1515 | if (rc == VERR_VD_BLOCK_FREE)
|
---|
[6291] | 1516 | {
|
---|
| 1517 | void *pvTmp = RTMemTmpAlloc(cbPreRead + cbThisWrite + cbPostRead);
|
---|
[8569] | 1518 | AssertBreakStmt(VALID_PTR(pvTmp), rc = VERR_NO_MEMORY);
|
---|
[6291] | 1519 |
|
---|
| 1520 | if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_HONOR_SAME))
|
---|
| 1521 | {
|
---|
| 1522 | /* Optimized write, suppress writing to a so far unallocated
|
---|
| 1523 | * block if the data is in fact not changed. */
|
---|
[27211] | 1524 | rc = vdWriteHelperOptimized(pDisk, pImage, pImageParentOverride,
|
---|
[32370] | 1525 | uOffsetCur, cbWriteCur,
|
---|
[6291] | 1526 | cbThisWrite, cbPreRead, cbPostRead,
|
---|
[32370] | 1527 | pcvBufCur, pvTmp);
|
---|
[6291] | 1528 | }
|
---|
| 1529 | else
|
---|
| 1530 | {
|
---|
| 1531 | /* Normal write, not optimized in any way. The block will
|
---|
| 1532 | * be written no matter what. This will usually (unless the
|
---|
| 1533 | * backend has some further optimization enabled) cause the
|
---|
| 1534 | * block to be allocated. */
|
---|
[27211] | 1535 | rc = vdWriteHelperStandard(pDisk, pImage, pImageParentOverride,
|
---|
[32370] | 1536 | uOffsetCur, cbWriteCur,
|
---|
[6291] | 1537 | cbThisWrite, cbPreRead, cbPostRead,
|
---|
[32370] | 1538 | pcvBufCur, pvTmp);
|
---|
[6291] | 1539 | }
|
---|
| 1540 | RTMemTmpFree(pvTmp);
|
---|
[11266] | 1541 | if (RT_FAILURE(rc))
|
---|
[6291] | 1542 | break;
|
---|
| 1543 | }
|
---|
| 1544 |
|
---|
[32370] | 1545 | cbWriteCur -= cbThisWrite;
|
---|
| 1546 | uOffsetCur += cbThisWrite;
|
---|
| 1547 | pcvBufCur = (char *)pcvBufCur + cbThisWrite;
|
---|
| 1548 | } while (cbWriteCur != 0 && RT_SUCCESS(rc));
|
---|
[6291] | 1549 |
|
---|
[32370] | 1550 | /* Update the cache on success */
|
---|
| 1551 | if ( RT_SUCCESS(rc)
|
---|
| 1552 | && pDisk->pCache
|
---|
| 1553 | && fUpdateCache)
|
---|
| 1554 | rc = vdCacheWriteHelper(pDisk->pCache, uOffset, pvBuf, cbWrite, NULL);
|
---|
| 1555 |
|
---|
[6291] | 1556 | return rc;
|
---|
| 1557 | }
|
---|
| 1558 |
|
---|
[27977] | 1559 | /**
|
---|
[28065] | 1560 | * internal: write a complete block (only used for diff images), taking the
|
---|
| 1561 | * remaining data from parent images. This implementation does not optimize
|
---|
| 1562 | * anything (except that it tries to read only that portions from parent
|
---|
| 1563 | * images that are really needed) - async version.
|
---|
| 1564 | */
|
---|
[28620] | 1565 | static int vdWriteHelperStandardAsync(PVDIOCTX pIoCtx)
|
---|
[28065] | 1566 | {
|
---|
| 1567 | int rc = VINF_SUCCESS;
|
---|
| 1568 |
|
---|
[28620] | 1569 | #if 0
|
---|
| 1570 |
|
---|
[28065] | 1571 | /* Read the data that goes before the write to fill the block. */
|
---|
| 1572 | if (cbPreRead)
|
---|
| 1573 | {
|
---|
[28620] | 1574 | rc = vdReadHelperAsync(pIoCtxDst);
|
---|
[28065] | 1575 | if (RT_FAILURE(rc))
|
---|
| 1576 | return rc;
|
---|
| 1577 | }
|
---|
| 1578 |
|
---|
| 1579 | /* Copy the data to the right place in the buffer. */
|
---|
| 1580 | vdIoCtxCopy(pIoCtxDst, pIoCtxSrc, cbThisWrite);
|
---|
| 1581 |
|
---|
| 1582 | /* Read the data that goes after the write to fill the block. */
|
---|
| 1583 | if (cbPostRead)
|
---|
| 1584 | {
|
---|
| 1585 | /* If we have data to be written, use that instead of reading
|
---|
| 1586 | * data from the image. */
|
---|
| 1587 | size_t cbWriteCopy;
|
---|
| 1588 | if (cbWrite > cbThisWrite)
|
---|
| 1589 | cbWriteCopy = RT_MIN(cbWrite - cbThisWrite, cbPostRead);
|
---|
| 1590 | else
|
---|
| 1591 | cbWriteCopy = 0;
|
---|
| 1592 | /* Figure out how much we cannnot read from the image, because
|
---|
| 1593 | * the last block to write might exceed the nominal size of the
|
---|
| 1594 | * image for technical reasons. */
|
---|
| 1595 | size_t cbFill;
|
---|
| 1596 | if (uOffset + cbThisWrite + cbPostRead > pDisk->cbSize)
|
---|
| 1597 | cbFill = uOffset + cbThisWrite + cbPostRead - pDisk->cbSize;
|
---|
| 1598 | else
|
---|
| 1599 | cbFill = 0;
|
---|
| 1600 | /* The rest must be read from the image. */
|
---|
| 1601 | size_t cbReadImage = cbPostRead - cbWriteCopy - cbFill;
|
---|
| 1602 |
|
---|
| 1603 | /* Now assemble the remaining data. */
|
---|
| 1604 | if (cbWriteCopy)
|
---|
| 1605 | {
|
---|
| 1606 | vdIoCtxCopy(pIoCtxDst, pIoCtxSrc, cbWriteCopy);
|
---|
| 1607 | ASMAtomicSubU32(&pIoCtxDst->cbTransferLeft, cbWriteCopy);
|
---|
| 1608 | }
|
---|
| 1609 |
|
---|
| 1610 | if (cbReadImage)
|
---|
| 1611 | rc = vdReadHelperAsync(pDisk, pImage, pImageParentOverride, pIoCtxDst,
|
---|
| 1612 | uOffset + cbThisWrite + cbWriteCopy,
|
---|
| 1613 | cbReadImage);
|
---|
| 1614 | if (RT_FAILURE(rc))
|
---|
| 1615 | return rc;
|
---|
| 1616 | /* Zero out the remainder of this block. Will never be visible, as this
|
---|
| 1617 | * is beyond the limit of the image. */
|
---|
| 1618 | if (cbFill)
|
---|
| 1619 | {
|
---|
| 1620 | vdIoCtxSet(pIoCtxDst, '\0', cbFill);
|
---|
| 1621 | ASMAtomicSubU32(&pIoCtxDst->cbTransferLeft, cbFill);
|
---|
| 1622 | }
|
---|
| 1623 | }
|
---|
| 1624 |
|
---|
| 1625 | if ( !pIoCtxDst->cbTransferLeft
|
---|
| 1626 | && !pIoCtxDst->cMetaTransfersPending
|
---|
| 1627 | && ASMAtomicCmpXchgBool(&pIoCtxDst->fComplete, true, false))
|
---|
| 1628 | {
|
---|
| 1629 | /* Write the full block to the virtual disk. */
|
---|
| 1630 | vdIoCtxChildReset(pIoCtxDst);
|
---|
[32536] | 1631 | rc = pImage->Backend->pfnAsyncWrite(pImage->pBackendData,
|
---|
[28065] | 1632 | uOffset - cbPreRead,
|
---|
| 1633 | cbPreRead + cbThisWrite + cbPostRead,
|
---|
| 1634 | pIoCtxDst,
|
---|
| 1635 | NULL, &cbPreRead, &cbPostRead, 0);
|
---|
| 1636 | Assert(rc != VERR_VD_BLOCK_FREE);
|
---|
| 1637 | Assert(cbPreRead == 0);
|
---|
| 1638 | Assert(cbPostRead == 0);
|
---|
| 1639 | }
|
---|
| 1640 | else
|
---|
| 1641 | {
|
---|
| 1642 | LogFlow(("cbTransferLeft=%u cMetaTransfersPending=%u fComplete=%RTbool\n",
|
---|
| 1643 | pIoCtxDst->cbTransferLeft, pIoCtxDst->cMetaTransfersPending,
|
---|
| 1644 | pIoCtxDst->fComplete));
|
---|
| 1645 | rc = VERR_VD_ASYNC_IO_IN_PROGRESS;
|
---|
| 1646 | }
|
---|
| 1647 |
|
---|
| 1648 | return rc;
|
---|
[28620] | 1649 | #endif
|
---|
| 1650 | return VERR_NOT_IMPLEMENTED;
|
---|
[28065] | 1651 | }
|
---|
| 1652 |
|
---|
[28620] | 1653 | static int vdWriteHelperOptimizedCmpAndWriteAsync(PVDIOCTX pIoCtx)
|
---|
[28065] | 1654 | {
|
---|
[28620] | 1655 | int rc = VINF_SUCCESS;
|
---|
| 1656 | PVDIMAGE pImage = pIoCtx->pImage;
|
---|
| 1657 | size_t cbThisWrite = 0;
|
---|
| 1658 | size_t cbPreRead = pIoCtx->Type.Child.cbPreRead;
|
---|
| 1659 | size_t cbPostRead = pIoCtx->Type.Child.cbPostRead;
|
---|
| 1660 | size_t cbWriteCopy = pIoCtx->Type.Child.Write.Optimized.cbWriteCopy;
|
---|
| 1661 | size_t cbFill = pIoCtx->Type.Child.Write.Optimized.cbFill;
|
---|
| 1662 | size_t cbReadImage = pIoCtx->Type.Child.Write.Optimized.cbReadImage;
|
---|
| 1663 | PVDIOCTX pIoCtxParent = pIoCtx->pIoCtxParent;
|
---|
[28065] | 1664 |
|
---|
[28693] | 1665 | LogFlowFunc(("pIoCtx=%#p\n", pIoCtx));
|
---|
| 1666 |
|
---|
[28620] | 1667 | AssertPtr(pIoCtxParent);
|
---|
[30555] | 1668 | Assert(!pIoCtxParent->pIoCtxParent);
|
---|
[28620] | 1669 | Assert(!pIoCtx->cbTransferLeft && !pIoCtx->cMetaTransfersPending);
|
---|
[28065] | 1670 |
|
---|
[28620] | 1671 | vdIoCtxChildReset(pIoCtx);
|
---|
| 1672 | cbThisWrite = pIoCtx->Type.Child.cbTransferParent;
|
---|
| 1673 | RTSgBufAdvance(&pIoCtx->SgBuf, cbPreRead);
|
---|
[28065] | 1674 |
|
---|
| 1675 | /* Check if the write would modify anything in this block. */
|
---|
[28620] | 1676 | if (!RTSgBufCmp(&pIoCtx->SgBuf, &pIoCtxParent->SgBuf, cbThisWrite))
|
---|
[28065] | 1677 | {
|
---|
[28154] | 1678 | RTSGBUF SgBufSrcTmp;
|
---|
| 1679 |
|
---|
[28620] | 1680 | RTSgBufClone(&SgBufSrcTmp, &pIoCtxParent->SgBuf);
|
---|
[28154] | 1681 | RTSgBufAdvance(&SgBufSrcTmp, cbThisWrite);
|
---|
[28620] | 1682 | RTSgBufAdvance(&pIoCtx->SgBuf, cbThisWrite);
|
---|
[28154] | 1683 |
|
---|
[28620] | 1684 | if (!cbWriteCopy || !RTSgBufCmp(&pIoCtx->SgBuf, &SgBufSrcTmp, cbWriteCopy))
|
---|
[28154] | 1685 | {
|
---|
| 1686 | /* Block is completely unchanged, so no need to write anything. */
|
---|
| 1687 | LogFlowFunc(("Block didn't changed\n"));
|
---|
[28620] | 1688 | ASMAtomicWriteU32(&pIoCtx->cbTransferLeft, 0);
|
---|
[29413] | 1689 | RTSgBufAdvance(&pIoCtxParent->SgBuf, cbThisWrite);
|
---|
[28620] | 1690 | return VINF_VD_ASYNC_IO_FINISHED;
|
---|
[28154] | 1691 | }
|
---|
[28065] | 1692 | }
|
---|
| 1693 |
|
---|
| 1694 | /* Copy the data to the right place in the buffer. */
|
---|
[28620] | 1695 | RTSgBufReset(&pIoCtx->SgBuf);
|
---|
| 1696 | RTSgBufAdvance(&pIoCtx->SgBuf, cbPreRead);
|
---|
| 1697 | vdIoCtxCopy(pIoCtx, pIoCtxParent, cbThisWrite);
|
---|
[28065] | 1698 |
|
---|
| 1699 | /* Handle the data that goes after the write to fill the block. */
|
---|
| 1700 | if (cbPostRead)
|
---|
| 1701 | {
|
---|
| 1702 | /* Now assemble the remaining data. */
|
---|
| 1703 | if (cbWriteCopy)
|
---|
[30044] | 1704 | {
|
---|
| 1705 | /*
|
---|
| 1706 | * The S/G buffer of the parent needs to be cloned because
|
---|
| 1707 | * it is not allowed to modify the state.
|
---|
| 1708 | */
|
---|
| 1709 | RTSGBUF SgBufParentTmp;
|
---|
| 1710 |
|
---|
| 1711 | RTSgBufClone(&SgBufParentTmp, &pIoCtxParent->SgBuf);
|
---|
| 1712 | RTSgBufCopy(&pIoCtx->SgBuf, &SgBufParentTmp, cbWriteCopy);
|
---|
| 1713 | }
|
---|
| 1714 |
|
---|
[28065] | 1715 | /* Zero out the remainder of this block. Will never be visible, as this
|
---|
| 1716 | * is beyond the limit of the image. */
|
---|
| 1717 | if (cbFill)
|
---|
[28154] | 1718 | {
|
---|
[28620] | 1719 | RTSgBufAdvance(&pIoCtx->SgBuf, cbReadImage);
|
---|
| 1720 | vdIoCtxSet(pIoCtx, '\0', cbFill);
|
---|
[28154] | 1721 | }
|
---|
[28065] | 1722 | }
|
---|
| 1723 |
|
---|
| 1724 | /* Write the full block to the virtual disk. */
|
---|
[28620] | 1725 | RTSgBufReset(&pIoCtx->SgBuf);
|
---|
[32536] | 1726 | rc = pImage->Backend->pfnAsyncWrite(pImage->pBackendData,
|
---|
[28620] | 1727 | pIoCtx->uOffset - cbPreRead,
|
---|
[30044] | 1728 | cbPreRead + cbThisWrite + cbPostRead,
|
---|
[28620] | 1729 | pIoCtx, NULL, &cbPreRead, &cbPostRead, 0);
|
---|
[28065] | 1730 | Assert(rc != VERR_VD_BLOCK_FREE);
|
---|
| 1731 | Assert(cbPreRead == 0);
|
---|
| 1732 | Assert(cbPostRead == 0);
|
---|
[30555] | 1733 | if (rc == VERR_VD_ASYNC_IO_IN_PROGRESS)
|
---|
| 1734 | rc = VINF_SUCCESS;
|
---|
[31586] | 1735 | else if (rc == VERR_VD_IOCTX_HALT)
|
---|
| 1736 | {
|
---|
| 1737 | pIoCtx->fBlocked = true;
|
---|
| 1738 | rc = VINF_SUCCESS;
|
---|
| 1739 | }
|
---|
[28154] | 1740 |
|
---|
[28065] | 1741 | return rc;
|
---|
| 1742 | }
|
---|
| 1743 |
|
---|
[28620] | 1744 | static int vdWriteHelperOptimizedPreReadAsync(PVDIOCTX pIoCtx)
|
---|
| 1745 | {
|
---|
[28693] | 1746 | int rc = VINF_SUCCESS;
|
---|
| 1747 |
|
---|
| 1748 | LogFlowFunc(("pIoCtx=%#p\n", pIoCtx));
|
---|
| 1749 |
|
---|
| 1750 | if (pIoCtx->cbTransferLeft)
|
---|
| 1751 | rc = vdReadHelperAsync(pIoCtx);
|
---|
| 1752 |
|
---|
| 1753 | if ( RT_SUCCESS(rc)
|
---|
| 1754 | && ( pIoCtx->cbTransferLeft
|
---|
| 1755 | || pIoCtx->cMetaTransfersPending))
|
---|
| 1756 | rc = VERR_VD_ASYNC_IO_IN_PROGRESS;
|
---|
| 1757 | else
|
---|
| 1758 | pIoCtx->pfnIoCtxTransferNext = vdWriteHelperOptimizedCmpAndWriteAsync;
|
---|
| 1759 |
|
---|
| 1760 | return rc;
|
---|
[28620] | 1761 | }
|
---|
| 1762 |
|
---|
[28065] | 1763 | /**
|
---|
[28620] | 1764 | * internal: write a complete block (only used for diff images), taking the
|
---|
| 1765 | * remaining data from parent images. This implementation optimizes out writes
|
---|
| 1766 | * that do not change the data relative to the state as of the parent images.
|
---|
| 1767 | * All backends which support differential/growing images support this - async version.
|
---|
| 1768 | */
|
---|
| 1769 | static int vdWriteHelperOptimizedAsync(PVDIOCTX pIoCtx)
|
---|
| 1770 | {
|
---|
| 1771 | PVBOXHDD pDisk = pIoCtx->pDisk;
|
---|
| 1772 | uint64_t uOffset = pIoCtx->Type.Child.uOffsetSaved;
|
---|
| 1773 | size_t cbThisWrite = pIoCtx->Type.Child.cbTransferParent;
|
---|
| 1774 | size_t cbPreRead = pIoCtx->Type.Child.cbPreRead;
|
---|
| 1775 | size_t cbPostRead = pIoCtx->Type.Child.cbPostRead;
|
---|
[30044] | 1776 | size_t cbWrite = pIoCtx->Type.Child.cbWriteParent;
|
---|
[28620] | 1777 | size_t cbFill = 0;
|
---|
| 1778 | size_t cbWriteCopy = 0;
|
---|
| 1779 | size_t cbReadImage = 0;
|
---|
| 1780 |
|
---|
[28693] | 1781 | LogFlowFunc(("pIoCtx=%#p\n", pIoCtx));
|
---|
| 1782 |
|
---|
[28620] | 1783 | AssertPtr(pIoCtx->pIoCtxParent);
|
---|
[30555] | 1784 | Assert(!pIoCtx->pIoCtxParent->pIoCtxParent);
|
---|
[28620] | 1785 |
|
---|
| 1786 | if (cbPostRead)
|
---|
| 1787 | {
|
---|
| 1788 | /* Figure out how much we cannnot read from the image, because
|
---|
| 1789 | * the last block to write might exceed the nominal size of the
|
---|
| 1790 | * image for technical reasons. */
|
---|
| 1791 | if (uOffset + cbThisWrite + cbPostRead > pDisk->cbSize)
|
---|
| 1792 | cbFill = uOffset + cbThisWrite + cbPostRead - pDisk->cbSize;
|
---|
| 1793 |
|
---|
| 1794 | /* If we have data to be written, use that instead of reading
|
---|
| 1795 | * data from the image. */
|
---|
| 1796 | if (cbWrite > cbThisWrite)
|
---|
| 1797 | cbWriteCopy = RT_MIN(cbWrite - cbThisWrite, cbPostRead);
|
---|
| 1798 |
|
---|
| 1799 | /* The rest must be read from the image. */
|
---|
| 1800 | cbReadImage = cbPostRead - cbWriteCopy - cbFill;
|
---|
| 1801 | }
|
---|
| 1802 |
|
---|
| 1803 | pIoCtx->Type.Child.Write.Optimized.cbFill = cbFill;
|
---|
| 1804 | pIoCtx->Type.Child.Write.Optimized.cbWriteCopy = cbWriteCopy;
|
---|
| 1805 | pIoCtx->Type.Child.Write.Optimized.cbReadImage = cbReadImage;
|
---|
| 1806 |
|
---|
| 1807 | /* Read the entire data of the block so that we can compare whether it will
|
---|
| 1808 | * be modified by the write or not. */
|
---|
| 1809 | pIoCtx->cbTransferLeft = cbPreRead + cbThisWrite + cbPostRead - cbFill;
|
---|
| 1810 | pIoCtx->cbTransfer = pIoCtx->cbTransferLeft;
|
---|
[30044] | 1811 | pIoCtx->uOffset -= cbPreRead;
|
---|
[28620] | 1812 |
|
---|
| 1813 | /* Next step */
|
---|
| 1814 | pIoCtx->pfnIoCtxTransferNext = vdWriteHelperOptimizedPreReadAsync;
|
---|
| 1815 | return VINF_SUCCESS;
|
---|
| 1816 | }
|
---|
| 1817 |
|
---|
| 1818 | /**
|
---|
[27977] | 1819 | * internal: write buffer to the image, taking care of block boundaries and
|
---|
| 1820 | * write optimizations - async version.
|
---|
| 1821 | */
|
---|
[28620] | 1822 | static int vdWriteHelperAsync(PVDIOCTX pIoCtx)
|
---|
[27977] | 1823 | {
|
---|
| 1824 | int rc;
|
---|
[28620] | 1825 | size_t cbWrite = pIoCtx->cbTransfer;
|
---|
| 1826 | uint64_t uOffset = pIoCtx->uOffset;
|
---|
| 1827 | PVDIMAGE pImage = pIoCtx->pImage;
|
---|
| 1828 | PVBOXHDD pDisk = pIoCtx->pDisk;
|
---|
[27977] | 1829 | unsigned fWrite;
|
---|
| 1830 | size_t cbThisWrite;
|
---|
| 1831 | size_t cbPreRead, cbPostRead;
|
---|
[6291] | 1832 |
|
---|
[27977] | 1833 | /* Loop until all written. */
|
---|
| 1834 | do
|
---|
| 1835 | {
|
---|
| 1836 | /* Try to write the possibly partial block to the last opened image.
|
---|
| 1837 | * This works when the block is already allocated in this image or
|
---|
| 1838 | * if it is a full-block write (and allocation isn't suppressed below).
|
---|
| 1839 | * For image formats which don't support zero blocks, it's beneficial
|
---|
| 1840 | * to avoid unnecessarily allocating unchanged blocks. This prevents
|
---|
| 1841 | * unwanted expanding of images. VMDK is an example. */
|
---|
| 1842 | cbThisWrite = cbWrite;
|
---|
| 1843 | fWrite = (pImage->uOpenFlags & VD_OPEN_FLAGS_HONOR_SAME)
|
---|
| 1844 | ? 0 : VD_WRITE_NO_ALLOC;
|
---|
[32536] | 1845 | rc = pImage->Backend->pfnAsyncWrite(pImage->pBackendData, uOffset,
|
---|
[27977] | 1846 | cbThisWrite, pIoCtx,
|
---|
| 1847 | &cbThisWrite, &cbPreRead,
|
---|
| 1848 | &cbPostRead, fWrite);
|
---|
| 1849 | if (rc == VERR_VD_BLOCK_FREE)
|
---|
| 1850 | {
|
---|
[28065] | 1851 | /*
|
---|
[28620] | 1852 | * If there is a growing request already put this one onto the waiting list.
|
---|
| 1853 | * It will be restarted if the current request completes.
|
---|
[28065] | 1854 | */
|
---|
[28683] | 1855 | if (ASMAtomicReadBool(&pDisk->fGrowing))
|
---|
[28065] | 1856 | {
|
---|
[30555] | 1857 | PVDIOCTXDEFERRED pDeferred = (PVDIOCTXDEFERRED)RTMemAllocZ(sizeof(VDIOCTXDEFERRED));
|
---|
| 1858 | AssertPtr(pDeferred);
|
---|
| 1859 |
|
---|
[28620] | 1860 | LogFlowFunc(("Deferring write pIoCtx=%#p\n", pIoCtx));
|
---|
[30555] | 1861 |
|
---|
[30863] | 1862 | Assert(!pIoCtx->pIoCtxParent && !pIoCtx->fBlocked);
|
---|
| 1863 |
|
---|
[30555] | 1864 | RTListInit(&pDeferred->NodeDeferred);
|
---|
| 1865 | pDeferred->pIoCtx = pIoCtx;
|
---|
| 1866 | RTListAppend(&pDisk->ListWriteGrowing, &pDeferred->NodeDeferred);
|
---|
[28683] | 1867 | pIoCtx->fBlocked = true;
|
---|
[28620] | 1868 | rc = VERR_VD_ASYNC_IO_IN_PROGRESS;
|
---|
[28065] | 1869 | break;
|
---|
| 1870 | }
|
---|
[27977] | 1871 | else
|
---|
| 1872 | {
|
---|
[28620] | 1873 | /*
|
---|
| 1874 | * Allocate segment and buffer in one go.
|
---|
| 1875 | * A bit hackish but avoids the need to allocate memory twice.
|
---|
| 1876 | */
|
---|
| 1877 | PRTSGSEG pTmp = (PRTSGSEG)RTMemAlloc(cbPreRead + cbThisWrite + cbPostRead + sizeof(RTSGSEG));
|
---|
| 1878 | AssertBreakStmt(VALID_PTR(pTmp), rc = VERR_NO_MEMORY);
|
---|
[28065] | 1879 |
|
---|
[28620] | 1880 | pTmp->pvSeg = pTmp + 1;
|
---|
| 1881 | pTmp->cbSeg = cbPreRead + cbThisWrite + cbPostRead;
|
---|
[27977] | 1882 |
|
---|
[28620] | 1883 | PVDIOCTX pIoCtxWrite = vdIoCtxChildAlloc(pDisk, VDIOCTXTXDIR_WRITE,
|
---|
| 1884 | uOffset, pTmp->cbSeg,
|
---|
| 1885 | pTmp, 1,
|
---|
| 1886 | pIoCtx, cbThisWrite,
|
---|
[30044] | 1887 | cbWrite,
|
---|
[29497] | 1888 | pTmp,
|
---|
[28620] | 1889 | (pImage->uOpenFlags & VD_OPEN_FLAGS_HONOR_SAME)
|
---|
| 1890 | ? vdWriteHelperStandardAsync
|
---|
| 1891 | : vdWriteHelperOptimizedAsync);
|
---|
| 1892 | if (!VALID_PTR(pIoCtxWrite))
|
---|
| 1893 | {
|
---|
| 1894 | RTMemTmpFree(pTmp);
|
---|
| 1895 | rc = VERR_NO_MEMORY;
|
---|
| 1896 | break;
|
---|
| 1897 | }
|
---|
| 1898 |
|
---|
| 1899 | /* Set the state to growing. */
|
---|
| 1900 | LogFlowFunc(("Disk is growing because of pIoCtx=%#p pIoCtxWrite=%#p\n",
|
---|
[31185] | 1901 |
|
---|
[28620] | 1902 | pIoCtx, pIoCtxWrite));
|
---|
[28683] | 1903 | ASMAtomicWriteBool(&pDisk->fGrowing, true);
|
---|
[28620] | 1904 |
|
---|
| 1905 | pIoCtxWrite->pImage = pImage;
|
---|
| 1906 | pIoCtxWrite->Type.Child.cbPreRead = cbPreRead;
|
---|
| 1907 | pIoCtxWrite->Type.Child.cbPostRead = cbPostRead;
|
---|
| 1908 |
|
---|
| 1909 | /* Process the write request */
|
---|
| 1910 | rc = vdIoCtxProcess(pIoCtxWrite);
|
---|
| 1911 |
|
---|
| 1912 | if (RT_FAILURE(rc) && (rc != VERR_VD_ASYNC_IO_IN_PROGRESS))
|
---|
| 1913 | {
|
---|
| 1914 | vdIoCtxFree(pDisk, pIoCtxWrite);
|
---|
| 1915 | break;
|
---|
| 1916 | }
|
---|
| 1917 | else if ( rc == VINF_VD_ASYNC_IO_FINISHED
|
---|
| 1918 | && ASMAtomicCmpXchgBool(&pIoCtxWrite->fComplete, true, false))
|
---|
| 1919 | {
|
---|
| 1920 | LogFlow(("Child write request completed\n"));
|
---|
| 1921 | Assert(pIoCtx->cbTransferLeft >= cbThisWrite);
|
---|
| 1922 | ASMAtomicSubU32(&pIoCtx->cbTransferLeft, cbThisWrite);
|
---|
[28683] | 1923 | ASMAtomicWriteBool(&pDisk->fGrowing, false);
|
---|
[28620] | 1924 | vdIoCtxFree(pDisk, pIoCtxWrite);
|
---|
| 1925 |
|
---|
| 1926 | rc = VINF_SUCCESS;
|
---|
| 1927 | }
|
---|
| 1928 | else
|
---|
[30863] | 1929 | {
|
---|
[28620] | 1930 | LogFlow(("Child write pending\n"));
|
---|
[30863] | 1931 | pIoCtx->fBlocked = true;
|
---|
| 1932 | rc = VERR_VD_ASYNC_IO_IN_PROGRESS;
|
---|
| 1933 | cbWrite -= cbThisWrite;
|
---|
| 1934 | uOffset += cbThisWrite;
|
---|
| 1935 | break;
|
---|
| 1936 | }
|
---|
[28065] | 1937 | }
|
---|
[27977] | 1938 | }
|
---|
| 1939 |
|
---|
[31586] | 1940 | if (rc == VERR_VD_IOCTX_HALT)
|
---|
| 1941 | {
|
---|
| 1942 | cbWrite -= cbThisWrite;
|
---|
| 1943 | uOffset += cbThisWrite;
|
---|
| 1944 | pIoCtx->fBlocked = true;
|
---|
[30555] | 1945 | break;
|
---|
[31586] | 1946 | }
|
---|
| 1947 | else if (rc == VERR_VD_NOT_ENOUGH_METADATA)
|
---|
| 1948 | break;
|
---|
[30555] | 1949 |
|
---|
[27977] | 1950 | cbWrite -= cbThisWrite;
|
---|
| 1951 | uOffset += cbThisWrite;
|
---|
[30555] | 1952 | } while (cbWrite != 0 && (RT_SUCCESS(rc) || rc == VERR_VD_ASYNC_IO_IN_PROGRESS));
|
---|
[27977] | 1953 |
|
---|
[31586] | 1954 | if ( rc == VERR_VD_ASYNC_IO_IN_PROGRESS
|
---|
| 1955 | || rc == VERR_VD_NOT_ENOUGH_METADATA
|
---|
| 1956 | || rc == VERR_VD_IOCTX_HALT)
|
---|
[28620] | 1957 | {
|
---|
| 1958 | /*
|
---|
| 1959 | * Tell the caller that we don't need to go back here because all
|
---|
| 1960 | * writes are initiated.
|
---|
| 1961 | */
|
---|
| 1962 | if (!cbWrite)
|
---|
| 1963 | rc = VINF_SUCCESS;
|
---|
| 1964 |
|
---|
| 1965 | pIoCtx->uOffset = uOffset;
|
---|
| 1966 | pIoCtx->cbTransfer = cbWrite;
|
---|
| 1967 | }
|
---|
| 1968 |
|
---|
[27977] | 1969 | return rc;
|
---|
| 1970 | }
|
---|
| 1971 |
|
---|
[6291] | 1972 | /**
|
---|
[28620] | 1973 | * Flush helper async version.
|
---|
| 1974 | */
|
---|
| 1975 | static int vdFlushHelperAsync(PVDIOCTX pIoCtx)
|
---|
| 1976 | {
|
---|
| 1977 | int rc = VINF_SUCCESS;
|
---|
| 1978 | PVBOXHDD pDisk = pIoCtx->pDisk;
|
---|
| 1979 | PVDIMAGE pImage = pIoCtx->pImage;
|
---|
| 1980 |
|
---|
| 1981 | vdResetModifiedFlag(pDisk);
|
---|
[32536] | 1982 | rc = pImage->Backend->pfnAsyncFlush(pImage->pBackendData, pIoCtx);
|
---|
[30555] | 1983 | if (rc == VERR_VD_ASYNC_IO_IN_PROGRESS)
|
---|
| 1984 | rc = VINF_SUCCESS;
|
---|
[28620] | 1985 |
|
---|
| 1986 | return rc;
|
---|
| 1987 | }
|
---|
| 1988 |
|
---|
| 1989 | /**
|
---|
[14852] | 1990 | * internal: scans plugin directory and loads the backends have been found.
|
---|
[7780] | 1991 | */
|
---|
[14852] | 1992 | static int vdLoadDynamicBackends()
|
---|
[7780] | 1993 | {
|
---|
[31504] | 1994 | #ifndef VBOX_HDD_NO_DYNAMIC_BACKENDS
|
---|
[7780] | 1995 | int rc = VINF_SUCCESS;
|
---|
| 1996 | PRTDIR pPluginDir = NULL;
|
---|
| 1997 |
|
---|
[14852] | 1998 | /* Enumerate plugin backends. */
|
---|
| 1999 | char szPath[RTPATH_MAX];
|
---|
| 2000 | rc = RTPathAppPrivateArch(szPath, sizeof(szPath));
|
---|
| 2001 | if (RT_FAILURE(rc))
|
---|
| 2002 | return rc;
|
---|
| 2003 |
|
---|
| 2004 | /* To get all entries with VBoxHDD as prefix. */
|
---|
| 2005 | char *pszPluginFilter;
|
---|
[32370] | 2006 | rc = RTStrAPrintf(&pszPluginFilter, "%s/%s*", szPath, VBOX_HDDFORMAT_PLUGIN_PREFIX);
|
---|
[14852] | 2007 | if (RT_FAILURE(rc))
|
---|
[7780] | 2008 | {
|
---|
[14852] | 2009 | rc = VERR_NO_MEMORY;
|
---|
| 2010 | return rc;
|
---|
| 2011 | }
|
---|
[7780] | 2012 |
|
---|
[14852] | 2013 | PRTDIRENTRYEX pPluginDirEntry = NULL;
|
---|
| 2014 | size_t cbPluginDirEntry = sizeof(RTDIRENTRYEX);
|
---|
| 2015 | /* The plugins are in the same directory as the other shared libs. */
|
---|
| 2016 | rc = RTDirOpenFiltered(&pPluginDir, pszPluginFilter, RTDIRFILTER_WINNT);
|
---|
| 2017 | if (RT_FAILURE(rc))
|
---|
| 2018 | {
|
---|
| 2019 | /* On Windows the above immediately signals that there are no
|
---|
| 2020 | * files matching, while on other platforms enumerating the
|
---|
| 2021 | * files below fails. Either way: no plugins. */
|
---|
| 2022 | goto out;
|
---|
| 2023 | }
|
---|
| 2024 |
|
---|
| 2025 | pPluginDirEntry = (PRTDIRENTRYEX)RTMemAllocZ(sizeof(RTDIRENTRYEX));
|
---|
| 2026 | if (!pPluginDirEntry)
|
---|
| 2027 | {
|
---|
| 2028 | rc = VERR_NO_MEMORY;
|
---|
| 2029 | goto out;
|
---|
| 2030 | }
|
---|
| 2031 |
|
---|
[25292] | 2032 | while ((rc = RTDirReadEx(pPluginDir, pPluginDirEntry, &cbPluginDirEntry, RTFSOBJATTRADD_NOTHING, RTPATH_F_ON_LINK)) != VERR_NO_MORE_FILES)
|
---|
[14852] | 2033 | {
|
---|
| 2034 | RTLDRMOD hPlugin = NIL_RTLDRMOD;
|
---|
| 2035 | PFNVBOXHDDFORMATLOAD pfnHDDFormatLoad = NULL;
|
---|
| 2036 | PVBOXHDDBACKEND pBackend = NULL;
|
---|
| 2037 | char *pszPluginPath = NULL;
|
---|
| 2038 |
|
---|
| 2039 | if (rc == VERR_BUFFER_OVERFLOW)
|
---|
[7780] | 2040 | {
|
---|
[14852] | 2041 | /* allocate new buffer. */
|
---|
| 2042 | RTMemFree(pPluginDirEntry);
|
---|
| 2043 | pPluginDirEntry = (PRTDIRENTRYEX)RTMemAllocZ(cbPluginDirEntry);
|
---|
| 2044 | /* Retry. */
|
---|
[25292] | 2045 | rc = RTDirReadEx(pPluginDir, pPluginDirEntry, &cbPluginDirEntry, RTFSOBJATTRADD_NOTHING, RTPATH_F_ON_LINK);
|
---|
[14852] | 2046 | if (RT_FAILURE(rc))
|
---|
[7780] | 2047 | break;
|
---|
| 2048 | }
|
---|
[14852] | 2049 | else if (RT_FAILURE(rc))
|
---|
[7780] | 2050 | break;
|
---|
| 2051 |
|
---|
[14852] | 2052 | /* We got the new entry. */
|
---|
| 2053 | if (!RTFS_IS_FILE(pPluginDirEntry->Info.Attr.fMode))
|
---|
| 2054 | continue;
|
---|
[7780] | 2055 |
|
---|
[14852] | 2056 | /* Prepend the path to the libraries. */
|
---|
| 2057 | rc = RTStrAPrintf(&pszPluginPath, "%s/%s", szPath, pPluginDirEntry->szName);
|
---|
[11266] | 2058 | if (RT_FAILURE(rc))
|
---|
[7780] | 2059 | {
|
---|
| 2060 | rc = VERR_NO_MEMORY;
|
---|
| 2061 | break;
|
---|
| 2062 | }
|
---|
| 2063 |
|
---|
[14852] | 2064 | rc = SUPR3HardenedLdrLoad(pszPluginPath, &hPlugin);
|
---|
| 2065 | if (RT_SUCCESS(rc))
|
---|
[14344] | 2066 | {
|
---|
[14852] | 2067 | rc = RTLdrGetSymbol(hPlugin, VBOX_HDDFORMAT_LOAD_NAME, (void**)&pfnHDDFormatLoad);
|
---|
| 2068 | if (RT_FAILURE(rc) || !pfnHDDFormatLoad)
|
---|
[7780] | 2069 | {
|
---|
[14852] | 2070 | LogFunc(("error resolving the entry point %s in plugin %s, rc=%Rrc, pfnHDDFormat=%#p\n", VBOX_HDDFORMAT_LOAD_NAME, pPluginDirEntry->szName, rc, pfnHDDFormatLoad));
|
---|
| 2071 | if (RT_SUCCESS(rc))
|
---|
| 2072 | rc = VERR_SYMBOL_NOT_FOUND;
|
---|
[7780] | 2073 | }
|
---|
| 2074 |
|
---|
[11266] | 2075 | if (RT_SUCCESS(rc))
|
---|
[7780] | 2076 | {
|
---|
[14852] | 2077 | /* Get the function table. */
|
---|
| 2078 | rc = pfnHDDFormatLoad(&pBackend);
|
---|
| 2079 | if (RT_SUCCESS(rc) && pBackend->cbSize == sizeof(VBOXHDDBACKEND))
|
---|
[7780] | 2080 | {
|
---|
[14852] | 2081 | pBackend->hPlugin = hPlugin;
|
---|
| 2082 | vdAddBackend(pBackend);
|
---|
[7780] | 2083 | }
|
---|
| 2084 | else
|
---|
[14852] | 2085 | LogFunc(("ignored plugin '%s': pBackend->cbSize=%d rc=%Rrc\n", pszPluginPath, pBackend->cbSize, rc));
|
---|
| 2086 | }
|
---|
| 2087 | else
|
---|
| 2088 | LogFunc(("ignored plugin '%s': rc=%Rrc\n", pszPluginPath, rc));
|
---|
[7780] | 2089 |
|
---|
[14852] | 2090 | if (RT_FAILURE(rc))
|
---|
[7780] | 2091 | RTLdrClose(hPlugin);
|
---|
| 2092 | }
|
---|
[14852] | 2093 | RTStrFree(pszPluginPath);
|
---|
| 2094 | }
|
---|
| 2095 | out:
|
---|
| 2096 | if (rc == VERR_NO_MORE_FILES)
|
---|
[14344] | 2097 | rc = VINF_SUCCESS;
|
---|
[14852] | 2098 | RTStrFree(pszPluginFilter);
|
---|
| 2099 | if (pPluginDirEntry)
|
---|
| 2100 | RTMemFree(pPluginDirEntry);
|
---|
| 2101 | if (pPluginDir)
|
---|
| 2102 | RTDirClose(pPluginDir);
|
---|
| 2103 | return rc;
|
---|
[31504] | 2104 | #else
|
---|
| 2105 | return VINF_SUCCESS;
|
---|
| 2106 | #endif
|
---|
[14852] | 2107 | }
|
---|
[7780] | 2108 |
|
---|
[14852] | 2109 | /**
|
---|
[32370] | 2110 | * internal: scans plugin directory and loads the cache backends have been found.
|
---|
| 2111 | */
|
---|
| 2112 | static int vdLoadDynamicCacheBackends()
|
---|
| 2113 | {
|
---|
| 2114 | #ifndef VBOX_HDD_NO_DYNAMIC_BACKENDS
|
---|
| 2115 | int rc = VINF_SUCCESS;
|
---|
| 2116 | PRTDIR pPluginDir = NULL;
|
---|
| 2117 |
|
---|
| 2118 | /* Enumerate plugin backends. */
|
---|
| 2119 | char szPath[RTPATH_MAX];
|
---|
| 2120 | rc = RTPathAppPrivateArch(szPath, sizeof(szPath));
|
---|
| 2121 | if (RT_FAILURE(rc))
|
---|
| 2122 | return rc;
|
---|
| 2123 |
|
---|
| 2124 | /* To get all entries with VBoxHDD as prefix. */
|
---|
| 2125 | char *pszPluginFilter;
|
---|
| 2126 | rc = RTStrAPrintf(&pszPluginFilter, "%s/%s*", szPath, VD_CACHEFORMAT_PLUGIN_PREFIX);
|
---|
| 2127 | if (RT_FAILURE(rc))
|
---|
| 2128 | {
|
---|
| 2129 | rc = VERR_NO_MEMORY;
|
---|
| 2130 | return rc;
|
---|
| 2131 | }
|
---|
| 2132 |
|
---|
| 2133 | PRTDIRENTRYEX pPluginDirEntry = NULL;
|
---|
| 2134 | size_t cbPluginDirEntry = sizeof(RTDIRENTRYEX);
|
---|
| 2135 | /* The plugins are in the same directory as the other shared libs. */
|
---|
| 2136 | rc = RTDirOpenFiltered(&pPluginDir, pszPluginFilter, RTDIRFILTER_WINNT);
|
---|
| 2137 | if (RT_FAILURE(rc))
|
---|
| 2138 | {
|
---|
| 2139 | /* On Windows the above immediately signals that there are no
|
---|
| 2140 | * files matching, while on other platforms enumerating the
|
---|
| 2141 | * files below fails. Either way: no plugins. */
|
---|
| 2142 | goto out;
|
---|
| 2143 | }
|
---|
| 2144 |
|
---|
| 2145 | pPluginDirEntry = (PRTDIRENTRYEX)RTMemAllocZ(sizeof(RTDIRENTRYEX));
|
---|
| 2146 | if (!pPluginDirEntry)
|
---|
| 2147 | {
|
---|
| 2148 | rc = VERR_NO_MEMORY;
|
---|
| 2149 | goto out;
|
---|
| 2150 | }
|
---|
| 2151 |
|
---|
| 2152 | while ((rc = RTDirReadEx(pPluginDir, pPluginDirEntry, &cbPluginDirEntry, RTFSOBJATTRADD_NOTHING, RTPATH_F_ON_LINK)) != VERR_NO_MORE_FILES)
|
---|
| 2153 | {
|
---|
| 2154 | RTLDRMOD hPlugin = NIL_RTLDRMOD;
|
---|
| 2155 | PFNVDCACHEFORMATLOAD pfnVDCacheLoad = NULL;
|
---|
| 2156 | PVDCACHEBACKEND pBackend = NULL;
|
---|
| 2157 | char *pszPluginPath = NULL;
|
---|
| 2158 |
|
---|
| 2159 | if (rc == VERR_BUFFER_OVERFLOW)
|
---|
| 2160 | {
|
---|
| 2161 | /* allocate new buffer. */
|
---|
| 2162 | RTMemFree(pPluginDirEntry);
|
---|
| 2163 | pPluginDirEntry = (PRTDIRENTRYEX)RTMemAllocZ(cbPluginDirEntry);
|
---|
| 2164 | /* Retry. */
|
---|
| 2165 | rc = RTDirReadEx(pPluginDir, pPluginDirEntry, &cbPluginDirEntry, RTFSOBJATTRADD_NOTHING, RTPATH_F_ON_LINK);
|
---|
| 2166 | if (RT_FAILURE(rc))
|
---|
| 2167 | break;
|
---|
| 2168 | }
|
---|
| 2169 | else if (RT_FAILURE(rc))
|
---|
| 2170 | break;
|
---|
| 2171 |
|
---|
| 2172 | /* We got the new entry. */
|
---|
| 2173 | if (!RTFS_IS_FILE(pPluginDirEntry->Info.Attr.fMode))
|
---|
| 2174 | continue;
|
---|
| 2175 |
|
---|
| 2176 | /* Prepend the path to the libraries. */
|
---|
| 2177 | rc = RTStrAPrintf(&pszPluginPath, "%s/%s", szPath, pPluginDirEntry->szName);
|
---|
| 2178 | if (RT_FAILURE(rc))
|
---|
| 2179 | {
|
---|
| 2180 | rc = VERR_NO_MEMORY;
|
---|
| 2181 | break;
|
---|
| 2182 | }
|
---|
| 2183 |
|
---|
| 2184 | rc = SUPR3HardenedLdrLoad(pszPluginPath, &hPlugin);
|
---|
| 2185 | if (RT_SUCCESS(rc))
|
---|
| 2186 | {
|
---|
| 2187 | rc = RTLdrGetSymbol(hPlugin, VD_CACHEFORMAT_LOAD_NAME, (void**)&pfnVDCacheLoad);
|
---|
| 2188 | if (RT_FAILURE(rc) || !pfnVDCacheLoad)
|
---|
| 2189 | {
|
---|
| 2190 | LogFunc(("error resolving the entry point %s in plugin %s, rc=%Rrc, pfnVDCacheLoad=%#p\n",
|
---|
| 2191 | VD_CACHEFORMAT_LOAD_NAME, pPluginDirEntry->szName, rc, pfnVDCacheLoad));
|
---|
| 2192 | if (RT_SUCCESS(rc))
|
---|
| 2193 | rc = VERR_SYMBOL_NOT_FOUND;
|
---|
| 2194 | }
|
---|
| 2195 |
|
---|
| 2196 | if (RT_SUCCESS(rc))
|
---|
| 2197 | {
|
---|
| 2198 | /* Get the function table. */
|
---|
| 2199 | rc = pfnVDCacheLoad(&pBackend);
|
---|
| 2200 | if (RT_SUCCESS(rc) && pBackend->cbSize == sizeof(VDCACHEBACKEND))
|
---|
| 2201 | {
|
---|
| 2202 | pBackend->hPlugin = hPlugin;
|
---|
| 2203 | vdAddCacheBackend(pBackend);
|
---|
| 2204 | }
|
---|
| 2205 | else
|
---|
| 2206 | LogFunc(("ignored plugin '%s': pBackend->cbSize=%d rc=%Rrc\n", pszPluginPath, pBackend->cbSize, rc));
|
---|
| 2207 | }
|
---|
| 2208 | else
|
---|
| 2209 | LogFunc(("ignored plugin '%s': rc=%Rrc\n", pszPluginPath, rc));
|
---|
| 2210 |
|
---|
| 2211 | if (RT_FAILURE(rc))
|
---|
| 2212 | RTLdrClose(hPlugin);
|
---|
| 2213 | }
|
---|
| 2214 | RTStrFree(pszPluginPath);
|
---|
| 2215 | }
|
---|
| 2216 | out:
|
---|
| 2217 | if (rc == VERR_NO_MORE_FILES)
|
---|
| 2218 | rc = VINF_SUCCESS;
|
---|
| 2219 | RTStrFree(pszPluginFilter);
|
---|
| 2220 | if (pPluginDirEntry)
|
---|
| 2221 | RTMemFree(pPluginDirEntry);
|
---|
| 2222 | if (pPluginDir)
|
---|
| 2223 | RTDirClose(pPluginDir);
|
---|
| 2224 | return rc;
|
---|
| 2225 | #else
|
---|
| 2226 | return VINF_SUCCESS;
|
---|
| 2227 | #endif
|
---|
| 2228 | }
|
---|
| 2229 |
|
---|
| 2230 | /**
|
---|
[22966] | 2231 | * VD async I/O interface open callback.
|
---|
| 2232 | */
|
---|
[32691] | 2233 | static int vdIOOpenFallback(void *pvUser, const char *pszLocation,
|
---|
| 2234 | uint32_t fOpen, PFNVDCOMPLETED pfnCompleted,
|
---|
[32553] | 2235 | void **ppStorage)
|
---|
[22966] | 2236 | {
|
---|
[32553] | 2237 | PVDIIOFALLBACKSTORAGE pStorage = (PVDIIOFALLBACKSTORAGE)RTMemAllocZ(sizeof(VDIIOFALLBACKSTORAGE));
|
---|
[22966] | 2238 |
|
---|
| 2239 | if (!pStorage)
|
---|
| 2240 | return VERR_NO_MEMORY;
|
---|
| 2241 |
|
---|
| 2242 | pStorage->pfnCompleted = pfnCompleted;
|
---|
| 2243 |
|
---|
| 2244 | /* Open the file. */
|
---|
[23973] | 2245 | int rc = RTFileOpen(&pStorage->File, pszLocation, fOpen);
|
---|
[22966] | 2246 | if (RT_SUCCESS(rc))
|
---|
| 2247 | {
|
---|
| 2248 | *ppStorage = pStorage;
|
---|
| 2249 | return VINF_SUCCESS;
|
---|
| 2250 | }
|
---|
| 2251 |
|
---|
| 2252 | RTMemFree(pStorage);
|
---|
| 2253 | return rc;
|
---|
| 2254 | }
|
---|
| 2255 |
|
---|
| 2256 | /**
|
---|
| 2257 | * VD async I/O interface close callback.
|
---|
| 2258 | */
|
---|
[32553] | 2259 | static int vdIOCloseFallback(void *pvUser, void *pvStorage)
|
---|
[22966] | 2260 | {
|
---|
[32553] | 2261 | PVDIIOFALLBACKSTORAGE pStorage = (PVDIIOFALLBACKSTORAGE)pvStorage;
|
---|
[22966] | 2262 |
|
---|
| 2263 | RTFileClose(pStorage->File);
|
---|
| 2264 | RTMemFree(pStorage);
|
---|
| 2265 | return VINF_SUCCESS;
|
---|
| 2266 | }
|
---|
| 2267 |
|
---|
[32553] | 2268 | static int vdIODeleteFallback(void *pvUser, const char *pcszFilename)
|
---|
| 2269 | {
|
---|
| 2270 | return RTFileDelete(pcszFilename);
|
---|
| 2271 | }
|
---|
| 2272 |
|
---|
| 2273 | static int vdIOMoveFallback(void *pvUser, const char *pcszSrc, const char *pcszDst, unsigned fMove)
|
---|
| 2274 | {
|
---|
| 2275 | return RTFileMove(pcszSrc, pcszDst, fMove);
|
---|
| 2276 | }
|
---|
| 2277 |
|
---|
| 2278 | static int vdIOGetFreeSpaceFallback(void *pvUser, const char *pcszFilename, int64_t *pcbFreeSpace)
|
---|
| 2279 | {
|
---|
| 2280 | return RTFsQuerySizes(pcszFilename, NULL, pcbFreeSpace, NULL, NULL);
|
---|
| 2281 | }
|
---|
| 2282 |
|
---|
| 2283 | static int vdIOGetModificationTimeFallback(void *pvUser, const char *pcszFilename, PRTTIMESPEC pModificationTime)
|
---|
| 2284 | {
|
---|
| 2285 | RTFSOBJINFO info;
|
---|
| 2286 | int rc = RTPathQueryInfo(pcszFilename, &info, RTFSOBJATTRADD_NOTHING);
|
---|
| 2287 | if (RT_SUCCESS(rc))
|
---|
| 2288 | *pModificationTime = info.ModificationTime;
|
---|
| 2289 | return rc;
|
---|
| 2290 | }
|
---|
| 2291 |
|
---|
[22966] | 2292 | /**
|
---|
| 2293 | * VD async I/O interface callback for retrieving the file size.
|
---|
| 2294 | */
|
---|
[32553] | 2295 | static int vdIOGetSizeFallback(void *pvUser, void *pvStorage, uint64_t *pcbSize)
|
---|
[22966] | 2296 | {
|
---|
[32553] | 2297 | PVDIIOFALLBACKSTORAGE pStorage = (PVDIIOFALLBACKSTORAGE)pvStorage;
|
---|
[22966] | 2298 |
|
---|
| 2299 | return RTFileGetSize(pStorage->File, pcbSize);
|
---|
| 2300 | }
|
---|
| 2301 |
|
---|
| 2302 | /**
|
---|
| 2303 | * VD async I/O interface callback for setting the file size.
|
---|
| 2304 | */
|
---|
[32553] | 2305 | static int vdIOSetSizeFallback(void *pvUser, void *pvStorage, uint64_t cbSize)
|
---|
[22966] | 2306 | {
|
---|
[32553] | 2307 | PVDIIOFALLBACKSTORAGE pStorage = (PVDIIOFALLBACKSTORAGE)pvStorage;
|
---|
[22966] | 2308 |
|
---|
| 2309 | return RTFileSetSize(pStorage->File, cbSize);
|
---|
| 2310 | }
|
---|
| 2311 |
|
---|
| 2312 | /**
|
---|
| 2313 | * VD async I/O interface callback for a synchronous write to the file.
|
---|
| 2314 | */
|
---|
[32553] | 2315 | static int vdIOWriteSyncFallback(void *pvUser, void *pvStorage, uint64_t uOffset,
|
---|
[32536] | 2316 | const void *pvBuf, size_t cbWrite, size_t *pcbWritten)
|
---|
[22966] | 2317 | {
|
---|
[32553] | 2318 | PVDIIOFALLBACKSTORAGE pStorage = (PVDIIOFALLBACKSTORAGE)pvStorage;
|
---|
[22966] | 2319 |
|
---|
| 2320 | return RTFileWriteAt(pStorage->File, uOffset, pvBuf, cbWrite, pcbWritten);
|
---|
| 2321 | }
|
---|
| 2322 |
|
---|
| 2323 | /**
|
---|
| 2324 | * VD async I/O interface callback for a synchronous read from the file.
|
---|
| 2325 | */
|
---|
[32553] | 2326 | static int vdIOReadSyncFallback(void *pvUser, void *pvStorage, uint64_t uOffset,
|
---|
[32536] | 2327 | void *pvBuf, size_t cbRead, size_t *pcbRead)
|
---|
[22966] | 2328 | {
|
---|
[32553] | 2329 | PVDIIOFALLBACKSTORAGE pStorage = (PVDIIOFALLBACKSTORAGE)pvStorage;
|
---|
[22966] | 2330 |
|
---|
| 2331 | return RTFileReadAt(pStorage->File, uOffset, pvBuf, cbRead, pcbRead);
|
---|
| 2332 | }
|
---|
| 2333 |
|
---|
| 2334 | /**
|
---|
| 2335 | * VD async I/O interface callback for a synchronous flush of the file data.
|
---|
| 2336 | */
|
---|
[32553] | 2337 | static int vdIOFlushSyncFallback(void *pvUser, void *pvStorage)
|
---|
[22966] | 2338 | {
|
---|
[32553] | 2339 | PVDIIOFALLBACKSTORAGE pStorage = (PVDIIOFALLBACKSTORAGE)pvStorage;
|
---|
[22966] | 2340 |
|
---|
| 2341 | return RTFileFlush(pStorage->File);
|
---|
| 2342 | }
|
---|
| 2343 |
|
---|
| 2344 | /**
|
---|
| 2345 | * VD async I/O interface callback for a asynchronous read from the file.
|
---|
| 2346 | */
|
---|
[32553] | 2347 | static int vdIOReadAsyncFallback(void *pvUser, void *pStorage, uint64_t uOffset,
|
---|
| 2348 | PCRTSGSEG paSegments, size_t cSegments,
|
---|
| 2349 | size_t cbRead, void *pvCompletion,
|
---|
| 2350 | void **ppTask)
|
---|
[22966] | 2351 | {
|
---|
| 2352 | return VERR_NOT_IMPLEMENTED;
|
---|
| 2353 | }
|
---|
| 2354 |
|
---|
| 2355 | /**
|
---|
| 2356 | * VD async I/O interface callback for a asynchronous write to the file.
|
---|
| 2357 | */
|
---|
[32553] | 2358 | static int vdIOWriteAsyncFallback(void *pvUser, void *pStorage, uint64_t uOffset,
|
---|
| 2359 | PCRTSGSEG paSegments, size_t cSegments,
|
---|
| 2360 | size_t cbWrite, void *pvCompletion,
|
---|
| 2361 | void **ppTask)
|
---|
[22966] | 2362 | {
|
---|
| 2363 | return VERR_NOT_IMPLEMENTED;
|
---|
| 2364 | }
|
---|
| 2365 |
|
---|
| 2366 | /**
|
---|
| 2367 | * VD async I/O interface callback for a asynchronous flush of the file data.
|
---|
| 2368 | */
|
---|
[32553] | 2369 | static int vdIOFlushAsyncFallback(void *pvUser, void *pStorage,
|
---|
| 2370 | void *pvCompletion, void **ppTask)
|
---|
[22966] | 2371 | {
|
---|
| 2372 | return VERR_NOT_IMPLEMENTED;
|
---|
| 2373 | }
|
---|
| 2374 |
|
---|
[30555] | 2375 | /**
|
---|
| 2376 | * Internal - Continues an I/O context after
|
---|
| 2377 | * it was halted because of an active transfer.
|
---|
| 2378 | */
|
---|
| 2379 | static int vdIoCtxContinue(PVDIOCTX pIoCtx, int rcReq)
|
---|
[27808] | 2380 | {
|
---|
[30555] | 2381 | PVBOXHDD pDisk = pIoCtx->pDisk;
|
---|
[28620] | 2382 | int rc = VINF_SUCCESS;
|
---|
[27977] | 2383 |
|
---|
[29240] | 2384 | if (RT_FAILURE(rcReq))
|
---|
| 2385 | ASMAtomicCmpXchgS32(&pIoCtx->rcReq, rcReq, VINF_SUCCESS);
|
---|
| 2386 |
|
---|
[28683] | 2387 | if (!pIoCtx->fBlocked)
|
---|
| 2388 | {
|
---|
| 2389 | /* Continue the transfer */
|
---|
| 2390 | rc = vdIoCtxProcess(pIoCtx);
|
---|
[28620] | 2391 |
|
---|
[28683] | 2392 | if ( rc == VINF_VD_ASYNC_IO_FINISHED
|
---|
| 2393 | && ASMAtomicCmpXchgBool(&pIoCtx->fComplete, true, false))
|
---|
[28154] | 2394 | {
|
---|
[28683] | 2395 | LogFlowFunc(("I/O context completed pIoCtx=%#p\n", pIoCtx));
|
---|
| 2396 | if (pIoCtx->pIoCtxParent)
|
---|
| 2397 | {
|
---|
| 2398 | PVDIOCTX pIoCtxParent = pIoCtx->pIoCtxParent;
|
---|
[28154] | 2399 |
|
---|
[28683] | 2400 | LogFlowFunc(("I/O context transfered %u bytes for the parent pIoCtxParent=%p\n",
|
---|
| 2401 | pIoCtx->Type.Child.cbTransferParent, pIoCtxParent));
|
---|
[28620] | 2402 |
|
---|
[28683] | 2403 | /* Update the parent state. */
|
---|
| 2404 | Assert(!pIoCtxParent->pIoCtxParent);
|
---|
| 2405 | Assert(pIoCtx->enmTxDir == VDIOCTXTXDIR_WRITE);
|
---|
[30863] | 2406 | Assert(pIoCtxParent->cbTransferLeft >= pIoCtx->Type.Child.cbTransferParent);
|
---|
[28683] | 2407 | ASMAtomicSubU32(&pIoCtxParent->cbTransferLeft, pIoCtx->Type.Child.cbTransferParent);
|
---|
[28154] | 2408 |
|
---|
[29240] | 2409 | if (RT_FAILURE(pIoCtx->rcReq))
|
---|
| 2410 | ASMAtomicCmpXchgS32(&pIoCtxParent->rcReq, pIoCtx->rcReq, VINF_SUCCESS);
|
---|
[29497] | 2411 |
|
---|
[28620] | 2412 | /*
|
---|
[30863] | 2413 | * A completed child write means that we finished growing the image.
|
---|
[28620] | 2414 | * We have to process any pending writes now.
|
---|
| 2415 | */
|
---|
| 2416 | Assert(pDisk->fGrowing);
|
---|
[28683] | 2417 | ASMAtomicWriteBool(&pDisk->fGrowing, false);
|
---|
[28620] | 2418 |
|
---|
[30863] | 2419 | /* Unblock the parent */
|
---|
| 2420 | pIoCtxParent->fBlocked = false;
|
---|
| 2421 |
|
---|
[28683] | 2422 | rc = vdIoCtxProcess(pIoCtxParent);
|
---|
| 2423 |
|
---|
| 2424 | if ( rc == VINF_VD_ASYNC_IO_FINISHED
|
---|
| 2425 | && ASMAtomicCmpXchgBool(&pIoCtxParent->fComplete, true, false))
|
---|
| 2426 | {
|
---|
[30555] | 2427 | LogFlowFunc(("Parent I/O context completed pIoCtxParent=%#p rcReq=%Rrc\n", pIoCtxParent, pIoCtxParent->rcReq));
|
---|
[28784] | 2428 | pIoCtxParent->Type.Root.pfnComplete(pIoCtxParent->Type.Root.pvUser1,
|
---|
| 2429 | pIoCtxParent->Type.Root.pvUser2,
|
---|
| 2430 | pIoCtxParent->rcReq);
|
---|
[29006] | 2431 | vdThreadFinishWrite(pDisk);
|
---|
[28683] | 2432 | vdIoCtxFree(pDisk, pIoCtxParent);
|
---|
| 2433 | }
|
---|
| 2434 |
|
---|
[30863] | 2435 | /* Process any pending writes if the current request didn't caused another growing. */
|
---|
[28620] | 2436 | RTCritSectEnter(&pDisk->CritSect);
|
---|
| 2437 |
|
---|
[30863] | 2438 | if (!RTListIsEmpty(&pDisk->ListWriteGrowing) && !pDisk->fGrowing)
|
---|
[28620] | 2439 | {
|
---|
| 2440 | RTLISTNODE ListTmp;
|
---|
| 2441 |
|
---|
[28683] | 2442 | LogFlowFunc(("Before: pNext=%#p pPrev=%#p\n", pDisk->ListWriteGrowing.pNext,
|
---|
| 2443 | pDisk->ListWriteGrowing.pPrev));
|
---|
| 2444 |
|
---|
[28620] | 2445 | RTListMove(&ListTmp, &pDisk->ListWriteGrowing);
|
---|
| 2446 |
|
---|
[28683] | 2447 | LogFlowFunc(("After: pNext=%#p pPrev=%#p\n", pDisk->ListWriteGrowing.pNext,
|
---|
| 2448 | pDisk->ListWriteGrowing.pPrev));
|
---|
| 2449 |
|
---|
[28620] | 2450 | RTCritSectLeave(&pDisk->CritSect);
|
---|
| 2451 |
|
---|
| 2452 | /* Process the list. */
|
---|
[28683] | 2453 | do
|
---|
[28620] | 2454 | {
|
---|
[30555] | 2455 | PVDIOCTXDEFERRED pDeferred = RTListNodeGetFirst(&ListTmp, VDIOCTXDEFERRED, NodeDeferred);
|
---|
| 2456 | PVDIOCTX pIoCtxWait = pDeferred->pIoCtx;
|
---|
| 2457 |
|
---|
[28683] | 2458 | AssertPtr(pIoCtxWait);
|
---|
| 2459 |
|
---|
[30555] | 2460 | RTListNodeRemove(&pDeferred->NodeDeferred);
|
---|
| 2461 | RTMemFree(pDeferred);
|
---|
[28683] | 2462 |
|
---|
[28620] | 2463 | Assert(!pIoCtxWait->pIoCtxParent);
|
---|
| 2464 |
|
---|
[30863] | 2465 | pIoCtxWait->fBlocked = false;
|
---|
[28620] | 2466 | LogFlowFunc(("Processing waiting I/O context pIoCtxWait=%#p\n", pIoCtxWait));
|
---|
| 2467 |
|
---|
| 2468 | rc = vdIoCtxProcess(pIoCtxWait);
|
---|
| 2469 | if ( rc == VINF_VD_ASYNC_IO_FINISHED
|
---|
| 2470 | && ASMAtomicCmpXchgBool(&pIoCtxWait->fComplete, true, false))
|
---|
| 2471 | {
|
---|
| 2472 | LogFlowFunc(("Waiting I/O context completed pIoCtxWait=%#p\n", pIoCtxWait));
|
---|
[29006] | 2473 | vdThreadFinishWrite(pDisk);
|
---|
[28620] | 2474 | pIoCtxWait->Type.Root.pfnComplete(pIoCtxWait->Type.Root.pvUser1,
|
---|
[28784] | 2475 | pIoCtxWait->Type.Root.pvUser2,
|
---|
| 2476 | pIoCtxWait->rcReq);
|
---|
[28620] | 2477 | vdIoCtxFree(pDisk, pIoCtxWait);
|
---|
| 2478 | }
|
---|
[28683] | 2479 | } while (!RTListIsEmpty(&ListTmp));
|
---|
[28620] | 2480 | }
|
---|
| 2481 | else
|
---|
| 2482 | RTCritSectLeave(&pDisk->CritSect);
|
---|
[28154] | 2483 | }
|
---|
[28683] | 2484 | else
|
---|
[29006] | 2485 | {
|
---|
[32520] | 2486 | if (pIoCtx->enmTxDir != VDIOCTXTXDIR_READ)
|
---|
| 2487 | {
|
---|
| 2488 | AssertMsg( pIoCtx->enmTxDir == VDIOCTXTXDIR_WRITE
|
---|
| 2489 | || pIoCtx->enmTxDir == VDIOCTXTXDIR_FLUSH,
|
---|
| 2490 | ("Invalid transfer direction\n"));
|
---|
[29006] | 2491 | vdThreadFinishWrite(pDisk);
|
---|
[32520] | 2492 | }
|
---|
[29006] | 2493 | else
|
---|
| 2494 | vdThreadFinishRead(pDisk);
|
---|
| 2495 |
|
---|
[30555] | 2496 | LogFlowFunc(("I/O context completed pIoCtx=%#p rcReq=%Rrc\n", pIoCtx, pIoCtx->rcReq));
|
---|
[28784] | 2497 | pIoCtx->Type.Root.pfnComplete(pIoCtx->Type.Root.pvUser1,
|
---|
| 2498 | pIoCtx->Type.Root.pvUser2,
|
---|
| 2499 | pIoCtx->rcReq);
|
---|
[29006] | 2500 | }
|
---|
[28683] | 2501 |
|
---|
| 2502 | vdIoCtxFree(pDisk, pIoCtx);
|
---|
[28154] | 2503 | }
|
---|
[27977] | 2504 | }
|
---|
| 2505 |
|
---|
[27808] | 2506 | return VINF_SUCCESS;
|
---|
| 2507 | }
|
---|
| 2508 |
|
---|
[22966] | 2509 | /**
|
---|
[30555] | 2510 | * Internal - Called when user transfer completed.
|
---|
| 2511 | */
|
---|
| 2512 | static int vdUserXferCompleted(PVDIOSTORAGE pIoStorage, PVDIOCTX pIoCtx,
|
---|
| 2513 | PFNVDXFERCOMPLETED pfnComplete, void *pvUser,
|
---|
| 2514 | size_t cbTransfer, int rcReq)
|
---|
| 2515 | {
|
---|
| 2516 | int rc = VINF_SUCCESS;
|
---|
| 2517 | bool fIoCtxContinue = true;
|
---|
| 2518 | PVBOXHDD pDisk = pIoCtx->pDisk;
|
---|
| 2519 |
|
---|
| 2520 | LogFlowFunc(("pIoStorage=%#p pIoCtx=%#p pfnComplete=%#p pvUser=%#p cbTransfer=%zu rcReq=%Rrc\n",
|
---|
| 2521 | pIoStorage, pIoCtx, pfnComplete, pvUser, cbTransfer, rcReq));
|
---|
| 2522 |
|
---|
[30863] | 2523 | Assert(pIoCtx->cbTransferLeft >= cbTransfer);
|
---|
[30555] | 2524 | ASMAtomicSubU32(&pIoCtx->cbTransferLeft, cbTransfer);
|
---|
| 2525 | ASMAtomicDecU32(&pIoCtx->cDataTransfersPending);
|
---|
| 2526 |
|
---|
| 2527 | if (pfnComplete)
|
---|
[30863] | 2528 | {
|
---|
| 2529 | RTCritSectEnter(&pDisk->CritSect);
|
---|
[32536] | 2530 | rc = pfnComplete(pIoStorage->pImage->pBackendData, pIoCtx, pvUser, rcReq);
|
---|
[30863] | 2531 | RTCritSectLeave(&pDisk->CritSect);
|
---|
| 2532 | }
|
---|
[30555] | 2533 |
|
---|
| 2534 | if (RT_SUCCESS(rc))
|
---|
| 2535 | rc = vdIoCtxContinue(pIoCtx, rcReq);
|
---|
| 2536 | else if (rc == VERR_VD_ASYNC_IO_IN_PROGRESS)
|
---|
| 2537 | rc = VINF_SUCCESS;
|
---|
| 2538 |
|
---|
| 2539 | return rc;
|
---|
| 2540 | }
|
---|
| 2541 |
|
---|
| 2542 | /**
|
---|
| 2543 | * Internal - Called when a meta transfer completed.
|
---|
| 2544 | */
|
---|
| 2545 | static int vdMetaXferCompleted(PVDIOSTORAGE pIoStorage, PFNVDXFERCOMPLETED pfnComplete, void *pvUser,
|
---|
| 2546 | PVDMETAXFER pMetaXfer, int rcReq)
|
---|
| 2547 | {
|
---|
| 2548 | PVBOXHDD pDisk = pIoStorage->pImage->pDisk;
|
---|
| 2549 | RTLISTNODE ListIoCtxWaiting;
|
---|
[30863] | 2550 | bool fFlush;
|
---|
[30555] | 2551 |
|
---|
| 2552 | LogFlowFunc(("pIoStorage=%#p pfnComplete=%#p pvUser=%#p pMetaXfer=%#p rcReq=%Rrc\n",
|
---|
| 2553 | pIoStorage, pfnComplete, pvUser, pMetaXfer, rcReq));
|
---|
| 2554 |
|
---|
[30863] | 2555 | RTCritSectEnter(&pDisk->CritSect);
|
---|
| 2556 | fFlush = VDMETAXFER_TXDIR_GET(pMetaXfer->fFlags) == VDMETAXFER_TXDIR_FLUSH;
|
---|
[30555] | 2557 | VDMETAXFER_TXDIR_SET(pMetaXfer->fFlags, VDMETAXFER_TXDIR_NONE);
|
---|
| 2558 |
|
---|
| 2559 | if (!fFlush)
|
---|
| 2560 | {
|
---|
| 2561 | RTListMove(&ListIoCtxWaiting, &pMetaXfer->ListIoCtxWaiting);
|
---|
| 2562 |
|
---|
| 2563 | if (RT_FAILURE(rcReq))
|
---|
| 2564 | {
|
---|
| 2565 | /* Remove from the AVL tree. */
|
---|
[30863] | 2566 | LogFlow(("Removing meta xfer=%#p\n", pMetaXfer));
|
---|
[32386] | 2567 | bool fRemoved = RTAvlrFileOffsetRemove(pIoStorage->pTreeMetaXfers, pMetaXfer->Core.Key) != NULL;
|
---|
[30555] | 2568 | Assert(fRemoved);
|
---|
| 2569 | RTMemFree(pMetaXfer);
|
---|
| 2570 | }
|
---|
| 2571 | else
|
---|
| 2572 | {
|
---|
| 2573 | /* Increase the reference counter to make sure it doesn't go away before the last context is processed. */
|
---|
| 2574 | pMetaXfer->cRefs++;
|
---|
| 2575 | }
|
---|
| 2576 | }
|
---|
| 2577 | else
|
---|
| 2578 | RTListMove(&ListIoCtxWaiting, &pMetaXfer->ListIoCtxWaiting);
|
---|
[30863] | 2579 | RTCritSectLeave(&pDisk->CritSect);
|
---|
[30555] | 2580 |
|
---|
| 2581 | /* Go through the waiting list and continue the I/O contexts. */
|
---|
| 2582 | while (!RTListIsEmpty(&ListIoCtxWaiting))
|
---|
| 2583 | {
|
---|
| 2584 | int rc = VINF_SUCCESS;
|
---|
| 2585 | bool fContinue = true;
|
---|
| 2586 | PVDIOCTXDEFERRED pDeferred = RTListNodeGetFirst(&ListIoCtxWaiting, VDIOCTXDEFERRED, NodeDeferred);
|
---|
| 2587 | PVDIOCTX pIoCtx = pDeferred->pIoCtx;
|
---|
| 2588 | RTListNodeRemove(&pDeferred->NodeDeferred);
|
---|
| 2589 |
|
---|
| 2590 | RTMemFree(pDeferred);
|
---|
| 2591 | ASMAtomicDecU32(&pIoCtx->cMetaTransfersPending);
|
---|
| 2592 |
|
---|
| 2593 | if (pfnComplete)
|
---|
[30863] | 2594 | {
|
---|
| 2595 | RTCritSectEnter(&pDisk->CritSect);
|
---|
[32536] | 2596 | rc = pfnComplete(pIoStorage->pImage->pBackendData, pIoCtx, pvUser, rcReq);
|
---|
[30863] | 2597 | RTCritSectLeave(&pDisk->CritSect);
|
---|
| 2598 | }
|
---|
[30555] | 2599 |
|
---|
| 2600 | LogFlow(("Completion callback for I/O context %#p returned %Rrc\n", pIoCtx, rc));
|
---|
| 2601 |
|
---|
| 2602 | if (RT_SUCCESS(rc))
|
---|
| 2603 | {
|
---|
| 2604 | rc = vdIoCtxContinue(pIoCtx, rcReq);
|
---|
| 2605 | AssertRC(rc);
|
---|
| 2606 | }
|
---|
| 2607 | else
|
---|
| 2608 | Assert(rc == VERR_VD_ASYNC_IO_IN_PROGRESS);
|
---|
| 2609 | }
|
---|
| 2610 |
|
---|
| 2611 | /* Remove if not used anymore. */
|
---|
| 2612 | if (RT_SUCCESS(rcReq) && !fFlush)
|
---|
| 2613 | {
|
---|
| 2614 | RTCritSectEnter(&pDisk->CritSect);
|
---|
| 2615 | pMetaXfer->cRefs--;
|
---|
[30863] | 2616 | if (!pMetaXfer->cRefs && RTListIsEmpty(&pMetaXfer->ListIoCtxWaiting))
|
---|
[30555] | 2617 | {
|
---|
| 2618 | /* Remove from the AVL tree. */
|
---|
[30863] | 2619 | LogFlow(("Removing meta xfer=%#p\n", pMetaXfer));
|
---|
[32386] | 2620 | bool fRemoved = RTAvlrFileOffsetRemove(pIoStorage->pTreeMetaXfers, pMetaXfer->Core.Key) != NULL;
|
---|
[30555] | 2621 | Assert(fRemoved);
|
---|
| 2622 | RTMemFree(pMetaXfer);
|
---|
| 2623 | }
|
---|
| 2624 | RTCritSectLeave(&pDisk->CritSect);
|
---|
| 2625 | }
|
---|
| 2626 | else if (fFlush)
|
---|
| 2627 | RTMemFree(pMetaXfer);
|
---|
| 2628 |
|
---|
| 2629 | return VINF_SUCCESS;
|
---|
| 2630 | }
|
---|
| 2631 |
|
---|
[32553] | 2632 | static int vdIOIntReqCompleted(void *pvUser, int rcReq)
|
---|
[30555] | 2633 | {
|
---|
| 2634 | int rc = VINF_SUCCESS;
|
---|
| 2635 | PVDIOTASK pIoTask = (PVDIOTASK)pvUser;
|
---|
| 2636 | PVDIOSTORAGE pIoStorage = pIoTask->pIoStorage;
|
---|
| 2637 |
|
---|
| 2638 | LogFlowFunc(("Task completed pIoTask=%#p\n", pIoTask));
|
---|
| 2639 |
|
---|
| 2640 | if (!pIoTask->fMeta)
|
---|
| 2641 | rc = vdUserXferCompleted(pIoStorage, pIoTask->Type.User.pIoCtx,
|
---|
| 2642 | pIoTask->pfnComplete, pIoTask->pvUser,
|
---|
| 2643 | pIoTask->Type.User.cbTransfer, rcReq);
|
---|
| 2644 | else
|
---|
| 2645 | rc = vdMetaXferCompleted(pIoStorage, pIoTask->pfnComplete, pIoTask->pvUser,
|
---|
| 2646 | pIoTask->Type.Meta.pMetaXfer, rcReq);
|
---|
| 2647 |
|
---|
| 2648 | vdIoTaskFree(pIoStorage->pImage->pDisk, pIoTask);
|
---|
| 2649 |
|
---|
| 2650 | return rc;
|
---|
| 2651 | }
|
---|
| 2652 |
|
---|
| 2653 | /**
|
---|
[27808] | 2654 | * VD I/O interface callback for opening a file.
|
---|
| 2655 | */
|
---|
[32553] | 2656 | static int vdIOIntOpen(void *pvUser, const char *pszLocation,
|
---|
[32691] | 2657 | unsigned uOpenFlags, PPVDIOSTORAGE ppIoStorage)
|
---|
[27808] | 2658 | {
|
---|
| 2659 | int rc = VINF_SUCCESS;
|
---|
[28620] | 2660 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
[27808] | 2661 | PVDIOSTORAGE pIoStorage = (PVDIOSTORAGE)RTMemAllocZ(sizeof(VDIOSTORAGE));
|
---|
| 2662 |
|
---|
| 2663 | if (!pIoStorage)
|
---|
| 2664 | return VERR_NO_MEMORY;
|
---|
| 2665 |
|
---|
[30555] | 2666 | pIoStorage->pImage = pImage;
|
---|
| 2667 |
|
---|
| 2668 | /* Create the AVl tree. */
|
---|
| 2669 | pIoStorage->pTreeMetaXfers = (PAVLRFOFFTREE)RTMemAllocZ(sizeof(AVLRFOFFTREE));
|
---|
| 2670 | if (pIoStorage->pTreeMetaXfers)
|
---|
| 2671 | {
|
---|
[32691] | 2672 | rc = pImage->pInterfaceIOCallbacks->pfnOpen(pImage->pInterfaceIO->pvUser,
|
---|
| 2673 | pszLocation, uOpenFlags,
|
---|
| 2674 | vdIOIntReqCompleted,
|
---|
| 2675 | &pIoStorage->pStorage);
|
---|
[30555] | 2676 | if (RT_SUCCESS(rc))
|
---|
| 2677 | {
|
---|
| 2678 | *ppIoStorage = pIoStorage;
|
---|
| 2679 | return VINF_SUCCESS;
|
---|
| 2680 | }
|
---|
| 2681 |
|
---|
| 2682 | RTMemFree(pIoStorage->pTreeMetaXfers);
|
---|
| 2683 | }
|
---|
[27808] | 2684 | else
|
---|
[30555] | 2685 | rc = VERR_NO_MEMORY;
|
---|
[27808] | 2686 |
|
---|
[30555] | 2687 | RTMemFree(pIoStorage);
|
---|
[27808] | 2688 | return rc;
|
---|
| 2689 | }
|
---|
| 2690 |
|
---|
[32553] | 2691 | static int vdIOIntTreeMetaXferDestroy(PAVLRFOFFNODECORE pNode, void *pvUser)
|
---|
[30555] | 2692 | {
|
---|
| 2693 | AssertMsgFailed(("Tree should be empty at this point!\n"));
|
---|
| 2694 | return VINF_SUCCESS;
|
---|
| 2695 | }
|
---|
| 2696 |
|
---|
[32553] | 2697 | static int vdIOIntClose(void *pvUser, PVDIOSTORAGE pIoStorage)
|
---|
[27808] | 2698 | {
|
---|
[28620] | 2699 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
[27808] | 2700 |
|
---|
[32691] | 2701 | int rc = pImage->pInterfaceIOCallbacks->pfnClose(pImage->pInterfaceIO->pvUser,
|
---|
| 2702 | pIoStorage->pStorage);
|
---|
[27808] | 2703 | AssertRC(rc);
|
---|
| 2704 |
|
---|
[32553] | 2705 | RTAvlrFileOffsetDestroy(pIoStorage->pTreeMetaXfers, vdIOIntTreeMetaXferDestroy, NULL);
|
---|
[30555] | 2706 | RTMemFree(pIoStorage->pTreeMetaXfers);
|
---|
[27808] | 2707 | RTMemFree(pIoStorage);
|
---|
| 2708 | return VINF_SUCCESS;
|
---|
| 2709 | }
|
---|
| 2710 |
|
---|
[32553] | 2711 | static int vdIOIntDelete(void *pvUser, const char *pcszFilename)
|
---|
[32536] | 2712 | {
|
---|
[32691] | 2713 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
| 2714 | return pImage->pInterfaceIOCallbacks->pfnDelete(pImage->pInterfaceIO->pvUser,
|
---|
| 2715 | pcszFilename);
|
---|
[32536] | 2716 | }
|
---|
| 2717 |
|
---|
[32691] | 2718 | static int vdIOIntMove(void *pvUser, const char *pcszSrc, const char *pcszDst,
|
---|
| 2719 | unsigned fMove)
|
---|
[32536] | 2720 | {
|
---|
[32691] | 2721 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
| 2722 | return pImage->pInterfaceIOCallbacks->pfnMove(pImage->pInterfaceIO->pvUser,
|
---|
| 2723 | pcszSrc, pcszDst, fMove);
|
---|
[32536] | 2724 | }
|
---|
| 2725 |
|
---|
[32691] | 2726 | static int vdIOIntGetFreeSpace(void *pvUser, const char *pcszFilename,
|
---|
| 2727 | int64_t *pcbFreeSpace)
|
---|
[32536] | 2728 | {
|
---|
[32691] | 2729 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
| 2730 | return pImage->pInterfaceIOCallbacks->pfnGetFreeSpace(pImage->pInterfaceIO->pvUser,
|
---|
| 2731 | pcszFilename,
|
---|
| 2732 | pcbFreeSpace);
|
---|
[32536] | 2733 | }
|
---|
| 2734 |
|
---|
[32691] | 2735 | static int vdIOIntGetModificationTime(void *pvUser, const char *pcszFilename,
|
---|
| 2736 | PRTTIMESPEC pModificationTime)
|
---|
[32536] | 2737 | {
|
---|
[32691] | 2738 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
| 2739 | return pImage->pInterfaceIOCallbacks->pfnGetModificationTime(pImage->pInterfaceIO->pvUser,
|
---|
| 2740 | pcszFilename,
|
---|
| 2741 | pModificationTime);
|
---|
[32536] | 2742 | }
|
---|
| 2743 |
|
---|
[32553] | 2744 | static int vdIOIntGetSize(void *pvUser, PVDIOSTORAGE pIoStorage,
|
---|
[32691] | 2745 | uint64_t *pcbSize)
|
---|
[27808] | 2746 | {
|
---|
[28620] | 2747 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
[27808] | 2748 |
|
---|
[32691] | 2749 | return pImage->pInterfaceIOCallbacks->pfnGetSize(pImage->pInterfaceIO->pvUser,
|
---|
[32553] | 2750 | pIoStorage->pStorage,
|
---|
| 2751 | pcbSize);
|
---|
[27808] | 2752 | }
|
---|
| 2753 |
|
---|
[32553] | 2754 | static int vdIOIntSetSize(void *pvUser, PVDIOSTORAGE pIoStorage,
|
---|
[32691] | 2755 | uint64_t cbSize)
|
---|
[27808] | 2756 | {
|
---|
[28620] | 2757 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
[27808] | 2758 |
|
---|
[32691] | 2759 | return pImage->pInterfaceIOCallbacks->pfnSetSize(pImage->pInterfaceIO->pvUser,
|
---|
| 2760 | pIoStorage->pStorage,
|
---|
| 2761 | cbSize);
|
---|
[27808] | 2762 | }
|
---|
| 2763 |
|
---|
[32691] | 2764 | static int vdIOIntWriteSync(void *pvUser, PVDIOSTORAGE pIoStorage,
|
---|
| 2765 | uint64_t uOffset, const void *pvBuf,
|
---|
| 2766 | size_t cbWrite, size_t *pcbWritten)
|
---|
[27808] | 2767 | {
|
---|
[28620] | 2768 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
[27808] | 2769 |
|
---|
[32691] | 2770 | return pImage->pInterfaceIOCallbacks->pfnWriteSync(pImage->pInterfaceIO->pvUser,
|
---|
| 2771 | pIoStorage->pStorage,
|
---|
| 2772 | uOffset, pvBuf, cbWrite,
|
---|
| 2773 | pcbWritten);
|
---|
[27808] | 2774 | }
|
---|
| 2775 |
|
---|
[32691] | 2776 | static int vdIOIntReadSync(void *pvUser, PVDIOSTORAGE pIoStorage,
|
---|
| 2777 | uint64_t uOffset, void *pvBuf, size_t cbRead,
|
---|
| 2778 | size_t *pcbRead)
|
---|
[27808] | 2779 | {
|
---|
[28620] | 2780 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
[27808] | 2781 |
|
---|
[32691] | 2782 | return pImage->pInterfaceIOCallbacks->pfnReadSync(pImage->pInterfaceIO->pvUser,
|
---|
| 2783 | pIoStorage->pStorage,
|
---|
| 2784 | uOffset, pvBuf, cbRead,
|
---|
| 2785 | pcbRead);
|
---|
[27808] | 2786 | }
|
---|
| 2787 |
|
---|
[32553] | 2788 | static int vdIOIntFlushSync(void *pvUser, PVDIOSTORAGE pIoStorage)
|
---|
[27808] | 2789 | {
|
---|
[28620] | 2790 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
[27808] | 2791 |
|
---|
[32691] | 2792 | return pImage->pInterfaceIOCallbacks->pfnFlushSync(pImage->pInterfaceIO->pvUser,
|
---|
| 2793 | pIoStorage->pStorage);
|
---|
[27808] | 2794 | }
|
---|
| 2795 |
|
---|
[32553] | 2796 | static int vdIOIntReadUserAsync(void *pvUser, PVDIOSTORAGE pIoStorage,
|
---|
[32691] | 2797 | uint64_t uOffset, PVDIOCTX pIoCtx,
|
---|
| 2798 | size_t cbRead)
|
---|
[27808] | 2799 | {
|
---|
[27977] | 2800 | int rc = VINF_SUCCESS;
|
---|
[28620] | 2801 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
| 2802 | PVBOXHDD pDisk = pImage->pDisk;
|
---|
[27977] | 2803 |
|
---|
[28620] | 2804 | LogFlowFunc(("pvUser=%#p pIoStorage=%#p uOffset=%llu pIoCtx=%#p cbRead=%u\n",
|
---|
| 2805 | pvUser, pIoStorage, uOffset, pIoCtx, cbRead));
|
---|
| 2806 |
|
---|
[30555] | 2807 | VD_THREAD_IS_CRITSECT_OWNER(pDisk);
|
---|
| 2808 |
|
---|
[27977] | 2809 | /* Build the S/G array and spawn a new I/O task */
|
---|
| 2810 | while (cbRead)
|
---|
| 2811 | {
|
---|
[28065] | 2812 | RTSGSEG aSeg[VD_IO_TASK_SEGMENTS_MAX];
|
---|
| 2813 | unsigned cSegments = VD_IO_TASK_SEGMENTS_MAX;
|
---|
| 2814 | size_t cbTaskRead = 0;
|
---|
[27977] | 2815 |
|
---|
[28065] | 2816 | cbTaskRead = RTSgBufSegArrayCreate(&pIoCtx->SgBuf, aSeg, &cSegments, cbRead);
|
---|
[27977] | 2817 |
|
---|
[28620] | 2818 | AssertMsg(cbTaskRead <= cbRead, ("Invalid number of bytes to read\n"));
|
---|
| 2819 |
|
---|
| 2820 | LogFlow(("Reading %u bytes into %u segments\n", cbTaskRead, cSegments));
|
---|
| 2821 |
|
---|
[30555] | 2822 | #ifdef RT_STRICT
|
---|
[28620] | 2823 | for (unsigned i = 0; i < cSegments; i++)
|
---|
| 2824 | AssertMsg(aSeg[i].pvSeg && !(aSeg[i].cbSeg % 512),
|
---|
| 2825 | ("Segment %u is invalid\n", i));
|
---|
| 2826 | #endif
|
---|
| 2827 |
|
---|
[30555] | 2828 | PVDIOTASK pIoTask = vdIoTaskUserAlloc(pIoStorage, NULL, NULL, pIoCtx, cbTaskRead);
|
---|
[27977] | 2829 |
|
---|
| 2830 | if (!pIoTask)
|
---|
| 2831 | return VERR_NO_MEMORY;
|
---|
| 2832 |
|
---|
[29240] | 2833 | ASMAtomicIncU32(&pIoCtx->cDataTransfersPending);
|
---|
| 2834 |
|
---|
[27977] | 2835 | void *pvTask;
|
---|
[32691] | 2836 | rc = pImage->pInterfaceIOCallbacks->pfnReadAsync(pImage->pInterfaceIO->pvUser,
|
---|
| 2837 | pIoStorage->pStorage,
|
---|
| 2838 | uOffset, aSeg, cSegments,
|
---|
| 2839 | cbTaskRead, pIoTask,
|
---|
| 2840 | &pvTask);
|
---|
[30555] | 2841 | if (RT_SUCCESS(rc))
|
---|
[28065] | 2842 | {
|
---|
| 2843 | AssertMsg(cbTaskRead <= pIoCtx->cbTransferLeft, ("Impossible!\n"));
|
---|
| 2844 | ASMAtomicSubU32(&pIoCtx->cbTransferLeft, cbTaskRead);
|
---|
[29240] | 2845 | ASMAtomicDecU32(&pIoCtx->cDataTransfersPending);
|
---|
[27977] | 2846 | vdIoTaskFree(pDisk, pIoTask);
|
---|
[28065] | 2847 | }
|
---|
[30555] | 2848 | else if (rc != VERR_VD_ASYNC_IO_IN_PROGRESS)
|
---|
[28065] | 2849 | {
|
---|
[30555] | 2850 | ASMAtomicDecU32(&pIoCtx->cDataTransfersPending);
|
---|
[28065] | 2851 | break;
|
---|
| 2852 | }
|
---|
[27977] | 2853 |
|
---|
| 2854 | uOffset += cbTaskRead;
|
---|
[28108] | 2855 | cbRead -= cbTaskRead;
|
---|
[27977] | 2856 | }
|
---|
| 2857 |
|
---|
[30555] | 2858 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[27977] | 2859 | return rc;
|
---|
[27808] | 2860 | }
|
---|
| 2861 |
|
---|
[32553] | 2862 | static int vdIOIntWriteUserAsync(void *pvUser, PVDIOSTORAGE pIoStorage,
|
---|
[32691] | 2863 | uint64_t uOffset, PVDIOCTX pIoCtx,
|
---|
| 2864 | size_t cbWrite,
|
---|
| 2865 | PFNVDXFERCOMPLETED pfnComplete,
|
---|
| 2866 | void *pvCompleteUser)
|
---|
[27808] | 2867 | {
|
---|
[27977] | 2868 | int rc = VINF_SUCCESS;
|
---|
[28620] | 2869 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
| 2870 | PVBOXHDD pDisk = pImage->pDisk;
|
---|
[27977] | 2871 |
|
---|
[28620] | 2872 | LogFlowFunc(("pvUser=%#p pIoStorage=%#p uOffset=%llu pIoCtx=%#p cbWrite=%u\n",
|
---|
| 2873 | pvUser, pIoStorage, uOffset, pIoCtx, cbWrite));
|
---|
| 2874 |
|
---|
[30555] | 2875 | VD_THREAD_IS_CRITSECT_OWNER(pDisk);
|
---|
| 2876 |
|
---|
[27977] | 2877 | /* Build the S/G array and spawn a new I/O task */
|
---|
| 2878 | while (cbWrite)
|
---|
| 2879 | {
|
---|
[28065] | 2880 | RTSGSEG aSeg[VD_IO_TASK_SEGMENTS_MAX];
|
---|
| 2881 | unsigned cSegments = VD_IO_TASK_SEGMENTS_MAX;
|
---|
| 2882 | size_t cbTaskWrite = 0;
|
---|
[27977] | 2883 |
|
---|
[28065] | 2884 | cbTaskWrite = RTSgBufSegArrayCreate(&pIoCtx->SgBuf, aSeg, &cSegments, cbWrite);
|
---|
[27977] | 2885 |
|
---|
[28620] | 2886 | AssertMsg(cbTaskWrite <= cbWrite, ("Invalid number of bytes to write\n"));
|
---|
| 2887 |
|
---|
| 2888 | LogFlow(("Writing %u bytes from %u segments\n", cbTaskWrite, cSegments));
|
---|
| 2889 |
|
---|
| 2890 | #ifdef DEBUG
|
---|
| 2891 | for (unsigned i = 0; i < cSegments; i++)
|
---|
| 2892 | AssertMsg(aSeg[i].pvSeg && !(aSeg[i].cbSeg % 512),
|
---|
| 2893 | ("Segment %u is invalid\n", i));
|
---|
| 2894 | #endif
|
---|
| 2895 |
|
---|
[30555] | 2896 | PVDIOTASK pIoTask = vdIoTaskUserAlloc(pIoStorage, pfnComplete, pvCompleteUser, pIoCtx, cbTaskWrite);
|
---|
[27977] | 2897 |
|
---|
| 2898 | if (!pIoTask)
|
---|
| 2899 | return VERR_NO_MEMORY;
|
---|
| 2900 |
|
---|
[29240] | 2901 | ASMAtomicIncU32(&pIoCtx->cDataTransfersPending);
|
---|
| 2902 |
|
---|
[27977] | 2903 | void *pvTask;
|
---|
[32691] | 2904 | rc = pImage->pInterfaceIOCallbacks->pfnWriteAsync(pImage->pInterfaceIO->pvUser,
|
---|
| 2905 | pIoStorage->pStorage,
|
---|
| 2906 | uOffset, aSeg, cSegments,
|
---|
| 2907 | cbTaskWrite, pIoTask,
|
---|
| 2908 | &pvTask);
|
---|
[30555] | 2909 | if (RT_SUCCESS(rc))
|
---|
[28065] | 2910 | {
|
---|
| 2911 | AssertMsg(cbTaskWrite <= pIoCtx->cbTransferLeft, ("Impossible!\n"));
|
---|
| 2912 | ASMAtomicSubU32(&pIoCtx->cbTransferLeft, cbTaskWrite);
|
---|
[29240] | 2913 | ASMAtomicDecU32(&pIoCtx->cDataTransfersPending);
|
---|
[27977] | 2914 | vdIoTaskFree(pDisk, pIoTask);
|
---|
[28065] | 2915 | }
|
---|
[30555] | 2916 | else if (rc != VERR_VD_ASYNC_IO_IN_PROGRESS)
|
---|
[28065] | 2917 | {
|
---|
[30555] | 2918 | ASMAtomicDecU32(&pIoCtx->cDataTransfersPending);
|
---|
[28065] | 2919 | break;
|
---|
| 2920 | }
|
---|
[27977] | 2921 |
|
---|
| 2922 | uOffset += cbTaskWrite;
|
---|
[28108] | 2923 | cbWrite -= cbTaskWrite;
|
---|
[27977] | 2924 | }
|
---|
| 2925 |
|
---|
| 2926 | return rc;
|
---|
[27808] | 2927 | }
|
---|
| 2928 |
|
---|
[32553] | 2929 | static int vdIOIntReadMetaAsync(void *pvUser, PVDIOSTORAGE pIoStorage,
|
---|
[32691] | 2930 | uint64_t uOffset, void *pvBuf,
|
---|
| 2931 | size_t cbRead, PVDIOCTX pIoCtx,
|
---|
| 2932 | PPVDMETAXFER ppMetaXfer,
|
---|
| 2933 | PFNVDXFERCOMPLETED pfnComplete,
|
---|
| 2934 | void *pvCompleteUser)
|
---|
[27808] | 2935 | {
|
---|
[28620] | 2936 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
| 2937 | PVBOXHDD pDisk = pImage->pDisk;
|
---|
[28065] | 2938 | int rc = VINF_SUCCESS;
|
---|
| 2939 | RTSGSEG Seg;
|
---|
| 2940 | PVDIOTASK pIoTask;
|
---|
[30555] | 2941 | PVDMETAXFER pMetaXfer = NULL;
|
---|
[28065] | 2942 | void *pvTask = NULL;
|
---|
| 2943 |
|
---|
[30555] | 2944 | LogFlowFunc(("pvUser=%#p pIoStorage=%#p uOffset=%llu pvBuf=%#p cbRead=%u\n",
|
---|
| 2945 | pvUser, pIoStorage, uOffset, pvBuf, cbRead));
|
---|
[28065] | 2946 |
|
---|
[30555] | 2947 | VD_THREAD_IS_CRITSECT_OWNER(pDisk);
|
---|
[28065] | 2948 |
|
---|
[30555] | 2949 | pMetaXfer = (PVDMETAXFER)RTAvlrFileOffsetGet(pIoStorage->pTreeMetaXfers, uOffset);
|
---|
| 2950 | if (!pMetaXfer)
|
---|
| 2951 | {
|
---|
[30863] | 2952 | #ifdef RT_STRICT
|
---|
| 2953 | pMetaXfer = (PVDMETAXFER)RTAvlrFileOffsetGetBestFit(pIoStorage->pTreeMetaXfers, uOffset, false /* fAbove */);
|
---|
[32370] | 2954 | AssertMsg(!pMetaXfer || (pMetaXfer->Core.Key + (RTFOFF)pMetaXfer->cbMeta <= (RTFOFF)uOffset),
|
---|
[30863] | 2955 | ("Overlapping meta transfers!\n"));
|
---|
| 2956 | #endif
|
---|
| 2957 |
|
---|
[30555] | 2958 | /* Allocate a new meta transfer. */
|
---|
| 2959 | pMetaXfer = vdMetaXferAlloc(pImage, pIoStorage, uOffset, cbRead);
|
---|
| 2960 | if (!pMetaXfer)
|
---|
| 2961 | return VERR_NO_MEMORY;
|
---|
[28065] | 2962 |
|
---|
[30863] | 2963 | pIoTask = vdIoTaskMetaAlloc(pIoStorage, pfnComplete, pvCompleteUser, pMetaXfer);
|
---|
[30555] | 2964 | if (!pIoTask)
|
---|
| 2965 | {
|
---|
| 2966 | RTMemFree(pMetaXfer);
|
---|
| 2967 | return VERR_NO_MEMORY;
|
---|
| 2968 | }
|
---|
| 2969 |
|
---|
| 2970 | Seg.cbSeg = cbRead;
|
---|
| 2971 | Seg.pvSeg = pMetaXfer->abData;
|
---|
| 2972 |
|
---|
| 2973 | VDMETAXFER_TXDIR_SET(pMetaXfer->fFlags, VDMETAXFER_TXDIR_READ);
|
---|
[32691] | 2974 | rc = pImage->pInterfaceIOCallbacks->pfnReadAsync(pImage->pInterfaceIO->pvUser,
|
---|
| 2975 | pIoStorage->pStorage,
|
---|
| 2976 | uOffset, &Seg, 1,
|
---|
| 2977 | cbRead, pIoTask,
|
---|
| 2978 | &pvTask);
|
---|
[30555] | 2979 |
|
---|
[30863] | 2980 | if (RT_SUCCESS(rc) || rc == VERR_VD_ASYNC_IO_IN_PROGRESS)
|
---|
[30555] | 2981 | {
|
---|
| 2982 | bool fInserted = RTAvlrFileOffsetInsert(pIoStorage->pTreeMetaXfers, &pMetaXfer->Core);
|
---|
| 2983 | Assert(fInserted);
|
---|
| 2984 | }
|
---|
| 2985 | else
|
---|
| 2986 | RTMemFree(pMetaXfer);
|
---|
[30863] | 2987 |
|
---|
| 2988 | if (RT_SUCCESS(rc))
|
---|
| 2989 | {
|
---|
| 2990 | VDMETAXFER_TXDIR_SET(pMetaXfer->fFlags, VDMETAXFER_TXDIR_NONE);
|
---|
| 2991 | vdIoTaskFree(pDisk, pIoTask);
|
---|
| 2992 | }
|
---|
| 2993 | else if (rc == VERR_VD_ASYNC_IO_IN_PROGRESS && !pfnComplete)
|
---|
| 2994 | rc = VERR_VD_NOT_ENOUGH_METADATA;
|
---|
[30555] | 2995 | }
|
---|
| 2996 |
|
---|
| 2997 | Assert(VALID_PTR(pMetaXfer) || RT_FAILURE(rc));
|
---|
| 2998 |
|
---|
[30863] | 2999 | if (RT_SUCCESS(rc) || rc == VERR_VD_NOT_ENOUGH_METADATA || rc == VERR_VD_ASYNC_IO_IN_PROGRESS)
|
---|
[28065] | 3000 | {
|
---|
[30555] | 3001 | /* If it is pending add the request to the list. */
|
---|
| 3002 | if (VDMETAXFER_TXDIR_GET(pMetaXfer->fFlags) == VDMETAXFER_TXDIR_READ)
|
---|
| 3003 | {
|
---|
| 3004 | PVDIOCTXDEFERRED pDeferred = (PVDIOCTXDEFERRED)RTMemAllocZ(sizeof(VDIOCTXDEFERRED));
|
---|
| 3005 | AssertPtr(pDeferred);
|
---|
| 3006 |
|
---|
| 3007 | RTListInit(&pDeferred->NodeDeferred);
|
---|
| 3008 | pDeferred->pIoCtx = pIoCtx;
|
---|
| 3009 |
|
---|
| 3010 | ASMAtomicIncU32(&pIoCtx->cMetaTransfersPending);
|
---|
| 3011 | RTListAppend(&pMetaXfer->ListIoCtxWaiting, &pDeferred->NodeDeferred);
|
---|
| 3012 | rc = VERR_VD_NOT_ENOUGH_METADATA;
|
---|
| 3013 | }
|
---|
| 3014 | else
|
---|
| 3015 | {
|
---|
| 3016 | /* Transfer the data. */
|
---|
| 3017 | pMetaXfer->cRefs++;
|
---|
| 3018 | Assert(pMetaXfer->cbMeta >= cbRead);
|
---|
[30863] | 3019 | Assert(pMetaXfer->Core.Key == (RTFOFF)uOffset);
|
---|
[30555] | 3020 | memcpy(pvBuf, pMetaXfer->abData, cbRead);
|
---|
| 3021 | *ppMetaXfer = pMetaXfer;
|
---|
| 3022 | }
|
---|
[28065] | 3023 | }
|
---|
| 3024 |
|
---|
| 3025 | return rc;
|
---|
[27808] | 3026 | }
|
---|
| 3027 |
|
---|
[32553] | 3028 | static int vdIOIntWriteMetaAsync(void *pvUser, PVDIOSTORAGE pIoStorage,
|
---|
[32691] | 3029 | uint64_t uOffset, void *pvBuf,
|
---|
| 3030 | size_t cbWrite, PVDIOCTX pIoCtx,
|
---|
| 3031 | PFNVDXFERCOMPLETED pfnComplete,
|
---|
| 3032 | void *pvCompleteUser)
|
---|
[27808] | 3033 | {
|
---|
[28620] | 3034 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
| 3035 | PVBOXHDD pDisk = pImage->pDisk;
|
---|
[28065] | 3036 | int rc = VINF_SUCCESS;
|
---|
| 3037 | RTSGSEG Seg;
|
---|
| 3038 | PVDIOTASK pIoTask;
|
---|
[30555] | 3039 | PVDMETAXFER pMetaXfer = NULL;
|
---|
[30863] | 3040 | bool fInTree = false;
|
---|
[28065] | 3041 | void *pvTask = NULL;
|
---|
| 3042 |
|
---|
[30555] | 3043 | LogFlowFunc(("pvUser=%#p pIoStorage=%#p uOffset=%llu pvBuf=%#p cbWrite=%u\n",
|
---|
| 3044 | pvUser, pIoStorage, uOffset, pvBuf, cbWrite));
|
---|
[28065] | 3045 |
|
---|
[30555] | 3046 | VD_THREAD_IS_CRITSECT_OWNER(pDisk);
|
---|
[28065] | 3047 |
|
---|
[30555] | 3048 | pMetaXfer = (PVDMETAXFER)RTAvlrFileOffsetGet(pIoStorage->pTreeMetaXfers, uOffset);
|
---|
| 3049 | if (!pMetaXfer)
|
---|
| 3050 | {
|
---|
| 3051 | /* Allocate a new meta transfer. */
|
---|
| 3052 | pMetaXfer = vdMetaXferAlloc(pImage, pIoStorage, uOffset, cbWrite);
|
---|
| 3053 | if (!pMetaXfer)
|
---|
| 3054 | return VERR_NO_MEMORY;
|
---|
[30863] | 3055 | }
|
---|
| 3056 | else
|
---|
| 3057 | {
|
---|
| 3058 | Assert(pMetaXfer->cbMeta >= cbWrite);
|
---|
| 3059 | Assert(pMetaXfer->Core.Key == (RTFOFF)uOffset);
|
---|
| 3060 | fInTree = true;
|
---|
| 3061 | }
|
---|
[28065] | 3062 |
|
---|
[30863] | 3063 | Assert(VDMETAXFER_TXDIR_GET(pMetaXfer->fFlags) == VDMETAXFER_TXDIR_NONE);
|
---|
[30555] | 3064 |
|
---|
[30863] | 3065 | pIoTask = vdIoTaskMetaAlloc(pIoStorage, pfnComplete, pvCompleteUser, pMetaXfer);
|
---|
| 3066 | if (!pIoTask)
|
---|
| 3067 | {
|
---|
| 3068 | RTMemFree(pMetaXfer);
|
---|
| 3069 | return VERR_NO_MEMORY;
|
---|
| 3070 | }
|
---|
[30555] | 3071 |
|
---|
[30863] | 3072 | memcpy(pMetaXfer->abData, pvBuf, cbWrite);
|
---|
| 3073 | Seg.cbSeg = cbWrite;
|
---|
| 3074 | Seg.pvSeg = pMetaXfer->abData;
|
---|
[30555] | 3075 |
|
---|
[30863] | 3076 | ASMAtomicIncU32(&pIoCtx->cMetaTransfersPending);
|
---|
| 3077 |
|
---|
| 3078 | VDMETAXFER_TXDIR_SET(pMetaXfer->fFlags, VDMETAXFER_TXDIR_WRITE);
|
---|
[32691] | 3079 | rc = pImage->pInterfaceIOCallbacks->pfnWriteAsync(pImage->pInterfaceIO->pvUser,
|
---|
| 3080 | pIoStorage->pStorage,
|
---|
| 3081 | uOffset, &Seg, 1,
|
---|
| 3082 | cbWrite, pIoTask,
|
---|
| 3083 | &pvTask);
|
---|
[30863] | 3084 | if (RT_SUCCESS(rc))
|
---|
| 3085 | {
|
---|
| 3086 | VDMETAXFER_TXDIR_SET(pMetaXfer->fFlags, VDMETAXFER_TXDIR_NONE);
|
---|
| 3087 | ASMAtomicDecU32(&pIoCtx->cMetaTransfersPending);
|
---|
| 3088 | vdIoTaskFree(pDisk, pIoTask);
|
---|
| 3089 | if (fInTree && !pMetaXfer->cRefs)
|
---|
[30555] | 3090 | {
|
---|
[30863] | 3091 | LogFlow(("Removing meta xfer=%#p\n", pMetaXfer));
|
---|
[32386] | 3092 | bool fRemoved = RTAvlrFileOffsetRemove(pIoStorage->pTreeMetaXfers, pMetaXfer->Core.Key) != NULL;
|
---|
[30863] | 3093 | AssertMsg(fRemoved, ("Metadata transfer wasn't removed\n"));
|
---|
[30555] | 3094 | RTMemFree(pMetaXfer);
|
---|
| 3095 | pMetaXfer = NULL;
|
---|
| 3096 | }
|
---|
[30863] | 3097 | }
|
---|
| 3098 | else if (rc == VERR_VD_ASYNC_IO_IN_PROGRESS)
|
---|
| 3099 | {
|
---|
| 3100 | PVDIOCTXDEFERRED pDeferred = (PVDIOCTXDEFERRED)RTMemAllocZ(sizeof(VDIOCTXDEFERRED));
|
---|
| 3101 | AssertPtr(pDeferred);
|
---|
[30555] | 3102 |
|
---|
[30863] | 3103 | RTListInit(&pDeferred->NodeDeferred);
|
---|
| 3104 | pDeferred->pIoCtx = pIoCtx;
|
---|
[30555] | 3105 |
|
---|
[30863] | 3106 | if (!fInTree)
|
---|
| 3107 | {
|
---|
[30555] | 3108 | bool fInserted = RTAvlrFileOffsetInsert(pIoStorage->pTreeMetaXfers, &pMetaXfer->Core);
|
---|
| 3109 | Assert(fInserted);
|
---|
[30863] | 3110 | }
|
---|
[30555] | 3111 |
|
---|
[30863] | 3112 | RTListAppend(&pMetaXfer->ListIoCtxWaiting, &pDeferred->NodeDeferred);
|
---|
[28065] | 3113 | }
|
---|
[30863] | 3114 | else
|
---|
| 3115 | {
|
---|
| 3116 | RTMemFree(pMetaXfer);
|
---|
| 3117 | pMetaXfer = NULL;
|
---|
| 3118 | }
|
---|
[28065] | 3119 |
|
---|
| 3120 | return rc;
|
---|
[27808] | 3121 | }
|
---|
| 3122 |
|
---|
[32553] | 3123 | static void vdIOIntMetaXferRelease(void *pvUser, PVDMETAXFER pMetaXfer)
|
---|
[30555] | 3124 | {
|
---|
| 3125 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
[32691] | 3126 | PVBOXHDD pDisk = pImage->pDisk;
|
---|
[30555] | 3127 | PVDIOSTORAGE pIoStorage = pMetaXfer->pIoStorage;
|
---|
| 3128 |
|
---|
[32691] | 3129 | VD_THREAD_IS_CRITSECT_OWNER(pDisk);
|
---|
[30555] | 3130 |
|
---|
| 3131 | Assert( VDMETAXFER_TXDIR_GET(pMetaXfer->fFlags) == VDMETAXFER_TXDIR_NONE
|
---|
| 3132 | || VDMETAXFER_TXDIR_GET(pMetaXfer->fFlags) == VDMETAXFER_TXDIR_WRITE);
|
---|
| 3133 | Assert(pMetaXfer->cRefs > 0);
|
---|
| 3134 |
|
---|
| 3135 | pMetaXfer->cRefs--;
|
---|
| 3136 | if ( !pMetaXfer->cRefs
|
---|
| 3137 | && RTListIsEmpty(&pMetaXfer->ListIoCtxWaiting)
|
---|
| 3138 | && VDMETAXFER_TXDIR_GET(pMetaXfer->fFlags) == VDMETAXFER_TXDIR_NONE)
|
---|
| 3139 | {
|
---|
| 3140 | /* Free the meta data entry. */
|
---|
[30863] | 3141 | LogFlow(("Removing meta xfer=%#p\n", pMetaXfer));
|
---|
[32386] | 3142 | bool fRemoved = RTAvlrFileOffsetRemove(pIoStorage->pTreeMetaXfers, pMetaXfer->Core.Key) != NULL;
|
---|
[30555] | 3143 | AssertMsg(fRemoved, ("Metadata transfer wasn't removed\n"));
|
---|
| 3144 |
|
---|
| 3145 | RTMemFree(pMetaXfer);
|
---|
| 3146 | }
|
---|
| 3147 | }
|
---|
| 3148 |
|
---|
[32553] | 3149 | static int vdIOIntFlushAsync(void *pvUser, PVDIOSTORAGE pIoStorage,
|
---|
[32691] | 3150 | PVDIOCTX pIoCtx, PFNVDXFERCOMPLETED pfnComplete,
|
---|
| 3151 | void *pvCompleteUser)
|
---|
[27808] | 3152 | {
|
---|
[28620] | 3153 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
| 3154 | PVBOXHDD pDisk = pImage->pDisk;
|
---|
[28383] | 3155 | int rc = VINF_SUCCESS;
|
---|
| 3156 | PVDIOTASK pIoTask;
|
---|
[30555] | 3157 | PVDMETAXFER pMetaXfer = NULL;
|
---|
[28383] | 3158 | void *pvTask = NULL;
|
---|
| 3159 |
|
---|
[30555] | 3160 | VD_THREAD_IS_CRITSECT_OWNER(pDisk);
|
---|
| 3161 |
|
---|
| 3162 | LogFlowFunc(("pvUser=%#p pIoStorage=%#p pIoCtx=%#p\n",
|
---|
| 3163 | pvUser, pIoStorage, pIoCtx));
|
---|
| 3164 |
|
---|
| 3165 | /* Allocate a new meta transfer. */
|
---|
| 3166 | pMetaXfer = vdMetaXferAlloc(pImage, pIoStorage, 0, 0);
|
---|
| 3167 | if (!pMetaXfer)
|
---|
| 3168 | return VERR_NO_MEMORY;
|
---|
| 3169 |
|
---|
| 3170 | pIoTask = vdIoTaskMetaAlloc(pIoStorage, pfnComplete, pvUser, pMetaXfer);
|
---|
[28383] | 3171 | if (!pIoTask)
|
---|
[30555] | 3172 | {
|
---|
| 3173 | RTMemFree(pMetaXfer);
|
---|
[28383] | 3174 | return VERR_NO_MEMORY;
|
---|
[30555] | 3175 | }
|
---|
[28383] | 3176 |
|
---|
| 3177 | ASMAtomicIncU32(&pIoCtx->cMetaTransfersPending);
|
---|
| 3178 |
|
---|
[30555] | 3179 | PVDIOCTXDEFERRED pDeferred = (PVDIOCTXDEFERRED)RTMemAllocZ(sizeof(VDIOCTXDEFERRED));
|
---|
| 3180 | AssertPtr(pDeferred);
|
---|
| 3181 |
|
---|
| 3182 | RTListInit(&pDeferred->NodeDeferred);
|
---|
| 3183 | pDeferred->pIoCtx = pIoCtx;
|
---|
| 3184 |
|
---|
| 3185 | RTListAppend(&pMetaXfer->ListIoCtxWaiting, &pDeferred->NodeDeferred);
|
---|
| 3186 | VDMETAXFER_TXDIR_SET(pMetaXfer->fFlags, VDMETAXFER_TXDIR_FLUSH);
|
---|
[32691] | 3187 | rc = pImage->pInterfaceIOCallbacks->pfnFlushAsync(pImage->pInterfaceIO->pvUser,
|
---|
| 3188 | pIoStorage->pStorage,
|
---|
| 3189 | pIoTask, &pvTask);
|
---|
[30555] | 3190 | if (RT_SUCCESS(rc))
|
---|
[28383] | 3191 | {
|
---|
[30555] | 3192 | VDMETAXFER_TXDIR_SET(pMetaXfer->fFlags, VDMETAXFER_TXDIR_NONE);
|
---|
[28383] | 3193 | ASMAtomicDecU32(&pIoCtx->cMetaTransfersPending);
|
---|
| 3194 | vdIoTaskFree(pDisk, pIoTask);
|
---|
[30555] | 3195 | RTMemFree(pDeferred);
|
---|
| 3196 | RTMemFree(pMetaXfer);
|
---|
[28383] | 3197 | }
|
---|
[30555] | 3198 | else if (rc != VERR_VD_ASYNC_IO_IN_PROGRESS)
|
---|
| 3199 | RTMemFree(pMetaXfer);
|
---|
[28383] | 3200 |
|
---|
| 3201 | return rc;
|
---|
[27808] | 3202 | }
|
---|
| 3203 |
|
---|
[32553] | 3204 | static size_t vdIOIntIoCtxCopyTo(void *pvUser, PVDIOCTX pIoCtx,
|
---|
[32691] | 3205 | void *pvBuf, size_t cbBuf)
|
---|
[27808] | 3206 | {
|
---|
[30555] | 3207 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
| 3208 | PVBOXHDD pDisk = pImage->pDisk;
|
---|
[31573] | 3209 | size_t cbCopied = 0;
|
---|
[30555] | 3210 |
|
---|
| 3211 | VD_THREAD_IS_CRITSECT_OWNER(pDisk);
|
---|
| 3212 |
|
---|
[31573] | 3213 | cbCopied = vdIoCtxCopyTo(pIoCtx, (uint8_t *)pvBuf, cbBuf);
|
---|
| 3214 | Assert(cbCopied == cbBuf);
|
---|
| 3215 |
|
---|
| 3216 | ASMAtomicSubU32(&pIoCtx->cbTransferLeft, cbCopied);
|
---|
| 3217 |
|
---|
| 3218 | return cbCopied;
|
---|
[27808] | 3219 | }
|
---|
| 3220 |
|
---|
[32553] | 3221 | static size_t vdIOIntIoCtxCopyFrom(void *pvUser, PVDIOCTX pIoCtx,
|
---|
[32691] | 3222 | void *pvBuf, size_t cbBuf)
|
---|
[27808] | 3223 | {
|
---|
[30555] | 3224 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
| 3225 | PVBOXHDD pDisk = pImage->pDisk;
|
---|
[31573] | 3226 | size_t cbCopied = 0;
|
---|
[30555] | 3227 |
|
---|
| 3228 | VD_THREAD_IS_CRITSECT_OWNER(pDisk);
|
---|
| 3229 |
|
---|
[31573] | 3230 | cbCopied = vdIoCtxCopyFrom(pIoCtx, (uint8_t *)pvBuf, cbBuf);
|
---|
| 3231 | Assert(cbCopied == cbBuf);
|
---|
| 3232 |
|
---|
| 3233 | ASMAtomicSubU32(&pIoCtx->cbTransferLeft, cbCopied);
|
---|
| 3234 |
|
---|
| 3235 | return cbCopied;
|
---|
[27808] | 3236 | }
|
---|
| 3237 |
|
---|
[32691] | 3238 | static size_t vdIOIntIoCtxSet(void *pvUser, PVDIOCTX pIoCtx, int ch, size_t cb)
|
---|
[27808] | 3239 | {
|
---|
[30555] | 3240 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
| 3241 | PVBOXHDD pDisk = pImage->pDisk;
|
---|
[31573] | 3242 | size_t cbSet = 0;
|
---|
[30555] | 3243 |
|
---|
| 3244 | VD_THREAD_IS_CRITSECT_OWNER(pDisk);
|
---|
| 3245 |
|
---|
[31573] | 3246 | cbSet = vdIoCtxSet(pIoCtx, ch, cb);
|
---|
| 3247 | Assert(cbSet == cb);
|
---|
| 3248 |
|
---|
| 3249 | ASMAtomicSubU32(&pIoCtx->cbTransferLeft, cbSet);
|
---|
| 3250 |
|
---|
| 3251 | return cbSet;
|
---|
[27808] | 3252 | }
|
---|
| 3253 |
|
---|
[32553] | 3254 | static size_t vdIOIntIoCtxSegArrayCreate(void *pvUser, PVDIOCTX pIoCtx,
|
---|
[32691] | 3255 | PRTSGSEG paSeg, unsigned *pcSeg,
|
---|
| 3256 | size_t cbData)
|
---|
[31586] | 3257 | {
|
---|
| 3258 | PVDIMAGE pImage = (PVDIMAGE)pvUser;
|
---|
| 3259 | PVBOXHDD pDisk = pImage->pDisk;
|
---|
| 3260 | size_t cbCreated = 0;
|
---|
| 3261 |
|
---|
| 3262 | VD_THREAD_IS_CRITSECT_OWNER(pDisk);
|
---|
| 3263 |
|
---|
| 3264 | cbCreated = RTSgBufSegArrayCreate(&pIoCtx->SgBuf, paSeg, pcSeg, cbData);
|
---|
| 3265 | Assert(!paSeg || cbData == cbCreated);
|
---|
| 3266 |
|
---|
| 3267 | return cbCreated;
|
---|
| 3268 | }
|
---|
| 3269 |
|
---|
[32553] | 3270 | static void vdIOIntIoCtxCompleted(void *pvUser, PVDIOCTX pIoCtx, int rcReq,
|
---|
[32691] | 3271 | size_t cbCompleted)
|
---|
[31586] | 3272 | {
|
---|
| 3273 | /* Continue */
|
---|
| 3274 | pIoCtx->fBlocked = false;
|
---|
| 3275 | ASMAtomicSubU32(&pIoCtx->cbTransferLeft, cbCompleted);
|
---|
| 3276 |
|
---|
| 3277 | /* Clear the pointer to next transfer function in case we have nothing to transfer anymore.
|
---|
| 3278 | * @todo: Find a better way to prevent vdIoCtxContinue from calling the read/write helper again. */
|
---|
| 3279 | if (!pIoCtx->cbTransferLeft)
|
---|
| 3280 | pIoCtx->pfnIoCtxTransfer = NULL;
|
---|
| 3281 |
|
---|
| 3282 | vdIoCtxContinue(pIoCtx, rcReq);
|
---|
| 3283 | }
|
---|
| 3284 |
|
---|
[27808] | 3285 | /**
|
---|
[27815] | 3286 | * VD I/O interface callback for opening a file (limited version for VDGetFormat).
|
---|
| 3287 | */
|
---|
[32553] | 3288 | static int vdIOIntOpenLimited(void *pvUser, const char *pszLocation,
|
---|
| 3289 | uint32_t fOpen, PPVDIOSTORAGE ppIoStorage)
|
---|
[27815] | 3290 | {
|
---|
| 3291 | int rc = VINF_SUCCESS;
|
---|
[32553] | 3292 | PVDINTERFACEIO pInterfaceIOCallbacks = (PVDINTERFACEIO)pvUser;
|
---|
[27815] | 3293 | PVDIOSTORAGE pIoStorage = (PVDIOSTORAGE)RTMemAllocZ(sizeof(VDIOSTORAGE));
|
---|
| 3294 |
|
---|
| 3295 | if (!pIoStorage)
|
---|
| 3296 | return VERR_NO_MEMORY;
|
---|
| 3297 |
|
---|
[32553] | 3298 | rc = pInterfaceIOCallbacks->pfnOpen(NULL, pszLocation, fOpen,
|
---|
[32691] | 3299 | NULL, &pIoStorage->pStorage);
|
---|
[27815] | 3300 | if (RT_SUCCESS(rc))
|
---|
| 3301 | *ppIoStorage = pIoStorage;
|
---|
| 3302 | else
|
---|
| 3303 | RTMemFree(pIoStorage);
|
---|
| 3304 |
|
---|
| 3305 | return rc;
|
---|
| 3306 | }
|
---|
| 3307 |
|
---|
[32553] | 3308 | static int vdIOIntCloseLimited(void *pvUser, PVDIOSTORAGE pIoStorage)
|
---|
[27815] | 3309 | {
|
---|
[32553] | 3310 | PVDINTERFACEIO pInterfaceIOCallbacks = (PVDINTERFACEIO)pvUser;
|
---|
| 3311 | int rc = pInterfaceIOCallbacks->pfnClose(NULL, pIoStorage->pStorage);
|
---|
[27815] | 3312 | AssertRC(rc);
|
---|
| 3313 |
|
---|
| 3314 | RTMemFree(pIoStorage);
|
---|
| 3315 | return VINF_SUCCESS;
|
---|
| 3316 | }
|
---|
| 3317 |
|
---|
[32553] | 3318 | static int vdIOIntDeleteLimited(void *pvUser, const char *pcszFilename)
|
---|
[32536] | 3319 | {
|
---|
[32553] | 3320 | PVDINTERFACEIO pInterfaceIOCallbacks = (PVDINTERFACEIO)pvUser;
|
---|
| 3321 | return pInterfaceIOCallbacks->pfnDelete(NULL, pcszFilename);
|
---|
[32536] | 3322 | }
|
---|
| 3323 |
|
---|
[32691] | 3324 | static int vdIOIntMoveLimited(void *pvUser, const char *pcszSrc,
|
---|
| 3325 | const char *pcszDst, unsigned fMove)
|
---|
[32536] | 3326 | {
|
---|
[32553] | 3327 | PVDINTERFACEIO pInterfaceIOCallbacks = (PVDINTERFACEIO)pvUser;
|
---|
| 3328 | return pInterfaceIOCallbacks->pfnMove(NULL, pcszSrc, pcszDst, fMove);
|
---|
[32536] | 3329 | }
|
---|
| 3330 |
|
---|
[32691] | 3331 | static int vdIOIntGetFreeSpaceLimited(void *pvUser, const char *pcszFilename,
|
---|
| 3332 | int64_t *pcbFreeSpace)
|
---|
[32536] | 3333 | {
|
---|
[32553] | 3334 | PVDINTERFACEIO pInterfaceIOCallbacks = (PVDINTERFACEIO)pvUser;
|
---|
| 3335 | return pInterfaceIOCallbacks->pfnGetFreeSpace(NULL, pcszFilename, pcbFreeSpace);
|
---|
[32536] | 3336 | }
|
---|
| 3337 |
|
---|
[32691] | 3338 | static int vdIOIntGetModificationTimeLimited(void *pvUser,
|
---|
| 3339 | const char *pcszFilename,
|
---|
| 3340 | PRTTIMESPEC pModificationTime)
|
---|
[32536] | 3341 | {
|
---|
[32553] | 3342 | PVDINTERFACEIO pInterfaceIOCallbacks = (PVDINTERFACEIO)pvUser;
|
---|
| 3343 | return pInterfaceIOCallbacks->pfnGetModificationTime(NULL, pcszFilename, pModificationTime);
|
---|
[32536] | 3344 | }
|
---|
| 3345 |
|
---|
[32553] | 3346 | static int vdIOIntGetSizeLimited(void *pvUser, PVDIOSTORAGE pIoStorage,
|
---|
[32691] | 3347 | uint64_t *pcbSize)
|
---|
[27815] | 3348 | {
|
---|
[32553] | 3349 | PVDINTERFACEIO pInterfaceIOCallbacks = (PVDINTERFACEIO)pvUser;
|
---|
| 3350 | return pInterfaceIOCallbacks->pfnGetSize(NULL, pIoStorage->pStorage, pcbSize);
|
---|
[27815] | 3351 | }
|
---|
| 3352 |
|
---|
[32553] | 3353 | static int vdIOIntSetSizeLimited(void *pvUser, PVDIOSTORAGE pIoStorage,
|
---|
[32691] | 3354 | uint64_t cbSize)
|
---|
[27815] | 3355 | {
|
---|
[32553] | 3356 | PVDINTERFACEIO pInterfaceIOCallbacks = (PVDINTERFACEIO)pvUser;
|
---|
| 3357 | return pInterfaceIOCallbacks->pfnSetSize(NULL, pIoStorage->pStorage, cbSize);
|
---|
[27815] | 3358 | }
|
---|
| 3359 |
|
---|
[32691] | 3360 | static int vdIOIntWriteSyncLimited(void *pvUser, PVDIOSTORAGE pIoStorage,
|
---|
| 3361 | uint64_t uOffset, const void *pvBuf,
|
---|
| 3362 | size_t cbWrite, size_t *pcbWritten)
|
---|
[27815] | 3363 | {
|
---|
[32553] | 3364 | PVDINTERFACEIO pInterfaceIOCallbacks = (PVDINTERFACEIO)pvUser;
|
---|
| 3365 | return pInterfaceIOCallbacks->pfnWriteSync(NULL, pIoStorage->pStorage, uOffset, pvBuf, cbWrite, pcbWritten);
|
---|
[27815] | 3366 | }
|
---|
| 3367 |
|
---|
[32691] | 3368 | static int vdIOIntReadSyncLimited(void *pvUser, PVDIOSTORAGE pIoStorage,
|
---|
| 3369 | uint64_t uOffset, void *pvBuf, size_t cbRead,
|
---|
| 3370 | size_t *pcbRead)
|
---|
[27815] | 3371 | {
|
---|
[32553] | 3372 | PVDINTERFACEIO pInterfaceIOCallbacks = (PVDINTERFACEIO)pvUser;
|
---|
| 3373 | return pInterfaceIOCallbacks->pfnReadSync(NULL, pIoStorage->pStorage, uOffset, pvBuf, cbRead, pcbRead);
|
---|
[27815] | 3374 | }
|
---|
| 3375 |
|
---|
[32553] | 3376 | static int vdIOIntFlushSyncLimited(void *pvUser, PVDIOSTORAGE pIoStorage)
|
---|
[27815] | 3377 | {
|
---|
[32553] | 3378 | PVDINTERFACEIO pInterfaceIOCallbacks = (PVDINTERFACEIO)pvUser;
|
---|
| 3379 | return pInterfaceIOCallbacks->pfnFlushSync(NULL, pIoStorage->pStorage);
|
---|
[27815] | 3380 | }
|
---|
| 3381 |
|
---|
| 3382 | /**
|
---|
[21806] | 3383 | * internal: send output to the log (unconditionally).
|
---|
| 3384 | */
|
---|
[32536] | 3385 | int vdLogMessage(void *pvUser, const char *pszFormat, va_list args)
|
---|
[21806] | 3386 | {
|
---|
| 3387 | NOREF(pvUser);
|
---|
[32536] | 3388 | RTLogPrintfV(pszFormat, args);
|
---|
[21806] | 3389 | return VINF_SUCCESS;
|
---|
| 3390 | }
|
---|
| 3391 |
|
---|
[32536] | 3392 | DECLINLINE(int) vdMessageWrapper(PVBOXHDD pDisk, const char *pszFormat, ...)
|
---|
| 3393 | {
|
---|
| 3394 | va_list va;
|
---|
| 3395 | va_start(va, pszFormat);
|
---|
| 3396 | int rc = pDisk->pInterfaceErrorCallbacks->pfnMessage(pDisk->pInterfaceError->pvUser,
|
---|
| 3397 | pszFormat, va);
|
---|
| 3398 | va_end(va);
|
---|
| 3399 | return rc;
|
---|
| 3400 | }
|
---|
[21806] | 3401 |
|
---|
[32536] | 3402 |
|
---|
[21806] | 3403 | /**
|
---|
[14852] | 3404 | * Initializes HDD backends.
|
---|
| 3405 | *
|
---|
| 3406 | * @returns VBox status code.
|
---|
| 3407 | */
|
---|
[16962] | 3408 | VBOXDDU_DECL(int) VDInit(void)
|
---|
[14852] | 3409 | {
|
---|
| 3410 | int rc = vdAddBackends(aStaticBackends, RT_ELEMENTS(aStaticBackends));
|
---|
| 3411 | if (RT_SUCCESS(rc))
|
---|
[32370] | 3412 | {
|
---|
| 3413 | rc = vdAddCacheBackends(aStaticCacheBackends, RT_ELEMENTS(aStaticCacheBackends));
|
---|
| 3414 | if (RT_SUCCESS(rc))
|
---|
| 3415 | {
|
---|
| 3416 | rc = vdLoadDynamicBackends();
|
---|
| 3417 | if (RT_SUCCESS(rc))
|
---|
| 3418 | rc = vdLoadDynamicCacheBackends();
|
---|
| 3419 | }
|
---|
| 3420 | }
|
---|
[14852] | 3421 | LogRel(("VDInit finished\n"));
|
---|
| 3422 | return rc;
|
---|
| 3423 | }
|
---|
| 3424 |
|
---|
| 3425 | /**
|
---|
| 3426 | * Destroys loaded HDD backends.
|
---|
| 3427 | *
|
---|
| 3428 | * @returns VBox status code.
|
---|
| 3429 | */
|
---|
[16962] | 3430 | VBOXDDU_DECL(int) VDShutdown(void)
|
---|
[14852] | 3431 | {
|
---|
| 3432 | PVBOXHDDBACKEND *pBackends = g_apBackends;
|
---|
[32370] | 3433 | PVDCACHEBACKEND *pCacheBackends = g_apCacheBackends;
|
---|
[14852] | 3434 | unsigned cBackends = g_cBackends;
|
---|
| 3435 |
|
---|
| 3436 | if (!pBackends)
|
---|
| 3437 | return VERR_INTERNAL_ERROR;
|
---|
| 3438 |
|
---|
| 3439 | g_cBackends = 0;
|
---|
| 3440 | g_apBackends = NULL;
|
---|
| 3441 |
|
---|
[31504] | 3442 | #ifndef VBOX_HDD_NO_DYNAMIC_BACKENDS
|
---|
[14852] | 3443 | for (unsigned i = 0; i < cBackends; i++)
|
---|
| 3444 | if (pBackends[i]->hPlugin != NIL_RTLDRMOD)
|
---|
| 3445 | RTLdrClose(pBackends[i]->hPlugin);
|
---|
[31504] | 3446 | #endif
|
---|
[14855] | 3447 |
|
---|
[32370] | 3448 | /* Clear the supported cache backends. */
|
---|
| 3449 | cBackends = g_cCacheBackends;
|
---|
| 3450 | g_cCacheBackends = 0;
|
---|
| 3451 | g_apCacheBackends = NULL;
|
---|
| 3452 |
|
---|
| 3453 | #ifndef VBOX_HDD_NO_DYNAMIC_BACKENDS
|
---|
| 3454 | for (unsigned i = 0; i < cBackends; i++)
|
---|
| 3455 | if (pCacheBackends[i]->hPlugin != NIL_RTLDRMOD)
|
---|
| 3456 | RTLdrClose(pCacheBackends[i]->hPlugin);
|
---|
| 3457 | #endif
|
---|
| 3458 |
|
---|
| 3459 | if (pCacheBackends)
|
---|
| 3460 | RTMemFree(pCacheBackends);
|
---|
[14855] | 3461 | RTMemFree(pBackends);
|
---|
[14852] | 3462 | return VINF_SUCCESS;
|
---|
| 3463 | }
|
---|
| 3464 |
|
---|
| 3465 |
|
---|
| 3466 | /**
|
---|
| 3467 | * Lists all HDD backends and their capabilities in a caller-provided buffer.
|
---|
| 3468 | *
|
---|
| 3469 | * @returns VBox status code.
|
---|
| 3470 | * VERR_BUFFER_OVERFLOW if not enough space is passed.
|
---|
| 3471 | * @param cEntriesAlloc Number of list entries available.
|
---|
| 3472 | * @param pEntries Pointer to array for the entries.
|
---|
| 3473 | * @param pcEntriesUsed Number of entries returned.
|
---|
| 3474 | */
|
---|
| 3475 | VBOXDDU_DECL(int) VDBackendInfo(unsigned cEntriesAlloc, PVDBACKENDINFO pEntries,
|
---|
| 3476 | unsigned *pcEntriesUsed)
|
---|
| 3477 | {
|
---|
| 3478 | int rc = VINF_SUCCESS;
|
---|
| 3479 | PRTDIR pPluginDir = NULL;
|
---|
| 3480 | unsigned cEntries = 0;
|
---|
| 3481 |
|
---|
| 3482 | LogFlowFunc(("cEntriesAlloc=%u pEntries=%#p pcEntriesUsed=%#p\n", cEntriesAlloc, pEntries, pcEntriesUsed));
|
---|
| 3483 | /* Check arguments. */
|
---|
| 3484 | AssertMsgReturn(cEntriesAlloc,
|
---|
| 3485 | ("cEntriesAlloc=%u\n", cEntriesAlloc),
|
---|
| 3486 | VERR_INVALID_PARAMETER);
|
---|
| 3487 | AssertMsgReturn(VALID_PTR(pEntries),
|
---|
| 3488 | ("pEntries=%#p\n", pEntries),
|
---|
| 3489 | VERR_INVALID_PARAMETER);
|
---|
| 3490 | AssertMsgReturn(VALID_PTR(pcEntriesUsed),
|
---|
| 3491 | ("pcEntriesUsed=%#p\n", pcEntriesUsed),
|
---|
| 3492 | VERR_INVALID_PARAMETER);
|
---|
| 3493 | if (!g_apBackends)
|
---|
| 3494 | VDInit();
|
---|
| 3495 |
|
---|
| 3496 | if (cEntriesAlloc < g_cBackends)
|
---|
| 3497 | {
|
---|
| 3498 | *pcEntriesUsed = g_cBackends;
|
---|
| 3499 | return VERR_BUFFER_OVERFLOW;
|
---|
| 3500 | }
|
---|
| 3501 |
|
---|
[14967] | 3502 | for (unsigned i = 0; i < g_cBackends; i++)
|
---|
| 3503 | {
|
---|
| 3504 | pEntries[i].pszBackend = g_apBackends[i]->pszBackendName;
|
---|
| 3505 | pEntries[i].uBackendCaps = g_apBackends[i]->uBackendCaps;
|
---|
| 3506 | pEntries[i].papszFileExtensions = g_apBackends[i]->papszFileExtensions;
|
---|
| 3507 | pEntries[i].paConfigInfo = g_apBackends[i]->paConfigInfo;
|
---|
| 3508 | pEntries[i].pfnComposeLocation = g_apBackends[i]->pfnComposeLocation;
|
---|
| 3509 | pEntries[i].pfnComposeName = g_apBackends[i]->pfnComposeName;
|
---|
| 3510 | }
|
---|
[14852] | 3511 |
|
---|
[11284] | 3512 | LogFlowFunc(("returns %Rrc *pcEntriesUsed=%u\n", rc, cEntries));
|
---|
[14852] | 3513 | *pcEntriesUsed = g_cBackends;
|
---|
[7780] | 3514 | return rc;
|
---|
| 3515 | }
|
---|
| 3516 |
|
---|
[10715] | 3517 | /**
|
---|
| 3518 | * Lists the capablities of a backend indentified by its name.
|
---|
| 3519 | *
|
---|
| 3520 | * @returns VBox status code.
|
---|
| 3521 | * @param pszBackend The backend name.
|
---|
| 3522 | * @param pEntries Pointer to an entry.
|
---|
| 3523 | */
|
---|
| 3524 | VBOXDDU_DECL(int) VDBackendInfoOne(const char *pszBackend, PVDBACKENDINFO pEntry)
|
---|
| 3525 | {
|
---|
[14852] | 3526 | LogFlowFunc(("pszBackend=%#p pEntry=%#p\n", pszBackend, pEntry));
|
---|
| 3527 | /* Check arguments. */
|
---|
| 3528 | AssertMsgReturn(VALID_PTR(pszBackend),
|
---|
| 3529 | ("pszBackend=%#p\n", pszBackend),
|
---|
| 3530 | VERR_INVALID_PARAMETER);
|
---|
| 3531 | AssertMsgReturn(VALID_PTR(pEntry),
|
---|
| 3532 | ("pEntry=%#p\n", pEntry),
|
---|
| 3533 | VERR_INVALID_PARAMETER);
|
---|
| 3534 | if (!g_apBackends)
|
---|
| 3535 | VDInit();
|
---|
| 3536 |
|
---|
| 3537 | /* Go through loaded backends. */
|
---|
| 3538 | for (unsigned i = 0; i < g_cBackends; i++)
|
---|
| 3539 | {
|
---|
[15366] | 3540 | if (!RTStrICmp(pszBackend, g_apBackends[i]->pszBackendName))
|
---|
[14852] | 3541 | {
|
---|
| 3542 | pEntry->pszBackend = g_apBackends[i]->pszBackendName;
|
---|
| 3543 | pEntry->uBackendCaps = g_apBackends[i]->uBackendCaps;
|
---|
| 3544 | pEntry->papszFileExtensions = g_apBackends[i]->papszFileExtensions;
|
---|
| 3545 | pEntry->paConfigInfo = g_apBackends[i]->paConfigInfo;
|
---|
| 3546 | return VINF_SUCCESS;
|
---|
| 3547 | }
|
---|
| 3548 | }
|
---|
| 3549 |
|
---|
| 3550 | return VERR_NOT_FOUND;
|
---|
[10715] | 3551 | }
|
---|
[7780] | 3552 |
|
---|
| 3553 | /**
|
---|
[6291] | 3554 | * Allocates and initializes an empty HDD container.
|
---|
[2379] | 3555 | * No image files are opened.
|
---|
| 3556 | *
|
---|
| 3557 | * @returns VBox status code.
|
---|
[11444] | 3558 | * @param pVDIfsDisk Pointer to the per-disk VD interface list.
|
---|
[6291] | 3559 | * @param ppDisk Where to store the reference to HDD container.
|
---|
[2379] | 3560 | */
|
---|
[11444] | 3561 | VBOXDDU_DECL(int) VDCreate(PVDINTERFACE pVDIfsDisk, PVBOXHDD *ppDisk)
|
---|
[2379] | 3562 | {
|
---|
| 3563 | int rc = VINF_SUCCESS;
|
---|
| 3564 | PVBOXHDD pDisk = NULL;
|
---|
| 3565 |
|
---|
[11444] | 3566 | LogFlowFunc(("pVDIfsDisk=%#p\n", pVDIfsDisk));
|
---|
[6291] | 3567 | do
|
---|
| 3568 | {
|
---|
| 3569 | /* Check arguments. */
|
---|
[8565] | 3570 | AssertMsgBreakStmt(VALID_PTR(ppDisk),
|
---|
| 3571 | ("ppDisk=%#p\n", ppDisk),
|
---|
| 3572 | rc = VERR_INVALID_PARAMETER);
|
---|
[2728] | 3573 |
|
---|
[7277] | 3574 | pDisk = (PVBOXHDD)RTMemAllocZ(sizeof(VBOXHDD));
|
---|
| 3575 | if (pDisk)
|
---|
[2379] | 3576 | {
|
---|
[7277] | 3577 | pDisk->u32Signature = VBOXHDDDISK_SIGNATURE;
|
---|
| 3578 | pDisk->cImages = 0;
|
---|
| 3579 | pDisk->pBase = NULL;
|
---|
| 3580 | pDisk->pLast = NULL;
|
---|
| 3581 | pDisk->cbSize = 0;
|
---|
| 3582 | pDisk->PCHSGeometry.cCylinders = 0;
|
---|
| 3583 | pDisk->PCHSGeometry.cHeads = 0;
|
---|
| 3584 | pDisk->PCHSGeometry.cSectors = 0;
|
---|
| 3585 | pDisk->LCHSGeometry.cCylinders = 0;
|
---|
| 3586 | pDisk->LCHSGeometry.cHeads = 0;
|
---|
| 3587 | pDisk->LCHSGeometry.cSectors = 0;
|
---|
[11444] | 3588 | pDisk->pVDIfsDisk = pVDIfsDisk;
|
---|
[10715] | 3589 | pDisk->pInterfaceError = NULL;
|
---|
| 3590 | pDisk->pInterfaceErrorCallbacks = NULL;
|
---|
[27232] | 3591 | pDisk->pInterfaceThreadSync = NULL;
|
---|
| 3592 | pDisk->pInterfaceThreadSyncCallbacks = NULL;
|
---|
[28620] | 3593 | pDisk->fGrowing = false;
|
---|
| 3594 | RTListInit(&pDisk->ListWriteGrowing);
|
---|
[10715] | 3595 |
|
---|
[27977] | 3596 | /* Create the I/O ctx cache */
|
---|
[27808] | 3597 | rc = RTMemCacheCreate(&pDisk->hMemCacheIoCtx, sizeof(VDIOCTX), 0, UINT32_MAX,
|
---|
| 3598 | NULL, NULL, NULL, 0);
|
---|
| 3599 | if (RT_FAILURE(rc))
|
---|
| 3600 | {
|
---|
| 3601 | RTMemFree(pDisk);
|
---|
| 3602 | break;
|
---|
| 3603 | }
|
---|
| 3604 |
|
---|
[27977] | 3605 | /* Create the I/O task cache */
|
---|
| 3606 | rc = RTMemCacheCreate(&pDisk->hMemCacheIoTask, sizeof(VDIOTASK), 0, UINT32_MAX,
|
---|
| 3607 | NULL, NULL, NULL, 0);
|
---|
| 3608 | if (RT_FAILURE(rc))
|
---|
| 3609 | {
|
---|
| 3610 | RTMemCacheDestroy(pDisk->hMemCacheIoCtx);
|
---|
| 3611 | RTMemFree(pDisk);
|
---|
| 3612 | break;
|
---|
| 3613 | }
|
---|
| 3614 |
|
---|
[28620] | 3615 | /* Create critical section. */
|
---|
| 3616 | rc = RTCritSectInit(&pDisk->CritSect);
|
---|
| 3617 | if (RT_FAILURE(rc))
|
---|
| 3618 | {
|
---|
| 3619 | RTMemCacheDestroy(pDisk->hMemCacheIoCtx);
|
---|
| 3620 | RTMemCacheDestroy(pDisk->hMemCacheIoTask);
|
---|
| 3621 | RTMemFree(pDisk);
|
---|
| 3622 | break;
|
---|
| 3623 | }
|
---|
[27977] | 3624 |
|
---|
[11444] | 3625 | pDisk->pInterfaceError = VDInterfaceGet(pVDIfsDisk, VDINTERFACETYPE_ERROR);
|
---|
[10715] | 3626 | if (pDisk->pInterfaceError)
|
---|
[11176] | 3627 | pDisk->pInterfaceErrorCallbacks = VDGetInterfaceError(pDisk->pInterfaceError);
|
---|
[22966] | 3628 |
|
---|
[27232] | 3629 | pDisk->pInterfaceThreadSync = VDInterfaceGet(pVDIfsDisk, VDINTERFACETYPE_THREADSYNC);
|
---|
| 3630 | if (pDisk->pInterfaceThreadSync)
|
---|
| 3631 | pDisk->pInterfaceThreadSyncCallbacks = VDGetInterfaceThreadSync(pDisk->pInterfaceThreadSync);
|
---|
[27808] | 3632 |
|
---|
[32691] | 3633 | /* Create fallback I/O callback table */
|
---|
| 3634 | pDisk->VDIIOCallbacks.cbSize = sizeof(VDINTERFACEIO);
|
---|
| 3635 | pDisk->VDIIOCallbacks.enmInterface = VDINTERFACETYPE_IO;
|
---|
| 3636 | pDisk->VDIIOCallbacks.pfnOpen = vdIOOpenFallback;
|
---|
| 3637 | pDisk->VDIIOCallbacks.pfnClose = vdIOCloseFallback;
|
---|
| 3638 | pDisk->VDIIOCallbacks.pfnDelete = vdIODeleteFallback;
|
---|
| 3639 | pDisk->VDIIOCallbacks.pfnMove = vdIOMoveFallback;
|
---|
| 3640 | pDisk->VDIIOCallbacks.pfnGetFreeSpace = vdIOGetFreeSpaceFallback;
|
---|
| 3641 | pDisk->VDIIOCallbacks.pfnGetModificationTime = vdIOGetModificationTimeFallback;
|
---|
| 3642 | pDisk->VDIIOCallbacks.pfnGetSize = vdIOGetSizeFallback;
|
---|
| 3643 | pDisk->VDIIOCallbacks.pfnSetSize = vdIOSetSizeFallback;
|
---|
| 3644 | pDisk->VDIIOCallbacks.pfnReadSync = vdIOReadSyncFallback;
|
---|
| 3645 | pDisk->VDIIOCallbacks.pfnWriteSync = vdIOWriteSyncFallback;
|
---|
| 3646 | pDisk->VDIIOCallbacks.pfnFlushSync = vdIOFlushSyncFallback;
|
---|
| 3647 | pDisk->VDIIOCallbacks.pfnReadAsync = vdIOReadAsyncFallback;
|
---|
| 3648 | pDisk->VDIIOCallbacks.pfnWriteAsync = vdIOWriteAsyncFallback;
|
---|
| 3649 | pDisk->VDIIOCallbacks.pfnFlushAsync = vdIOFlushAsyncFallback;
|
---|
[22966] | 3650 |
|
---|
[32553] | 3651 | /*
|
---|
| 3652 | * Create the internal I/O callback table.
|
---|
| 3653 | * The interface is per-image but no need to duplicate the
|
---|
| 3654 | * callback table every time.
|
---|
| 3655 | */
|
---|
| 3656 | pDisk->VDIIOIntCallbacks.cbSize = sizeof(VDINTERFACEIOINT);
|
---|
| 3657 | pDisk->VDIIOIntCallbacks.enmInterface = VDINTERFACETYPE_IOINT;
|
---|
| 3658 | pDisk->VDIIOIntCallbacks.pfnOpen = vdIOIntOpen;
|
---|
| 3659 | pDisk->VDIIOIntCallbacks.pfnClose = vdIOIntClose;
|
---|
| 3660 | pDisk->VDIIOIntCallbacks.pfnDelete = vdIOIntDelete;
|
---|
| 3661 | pDisk->VDIIOIntCallbacks.pfnMove = vdIOIntMove;
|
---|
| 3662 | pDisk->VDIIOIntCallbacks.pfnGetFreeSpace = vdIOIntGetFreeSpace;
|
---|
| 3663 | pDisk->VDIIOIntCallbacks.pfnGetModificationTime = vdIOIntGetModificationTime;
|
---|
| 3664 | pDisk->VDIIOIntCallbacks.pfnGetSize = vdIOIntGetSize;
|
---|
| 3665 | pDisk->VDIIOIntCallbacks.pfnSetSize = vdIOIntSetSize;
|
---|
| 3666 | pDisk->VDIIOIntCallbacks.pfnReadSync = vdIOIntReadSync;
|
---|
| 3667 | pDisk->VDIIOIntCallbacks.pfnWriteSync = vdIOIntWriteSync;
|
---|
| 3668 | pDisk->VDIIOIntCallbacks.pfnFlushSync = vdIOIntFlushSync;
|
---|
| 3669 | pDisk->VDIIOIntCallbacks.pfnReadUserAsync = vdIOIntReadUserAsync;
|
---|
| 3670 | pDisk->VDIIOIntCallbacks.pfnWriteUserAsync = vdIOIntWriteUserAsync;
|
---|
| 3671 | pDisk->VDIIOIntCallbacks.pfnReadMetaAsync = vdIOIntReadMetaAsync;
|
---|
| 3672 | pDisk->VDIIOIntCallbacks.pfnWriteMetaAsync = vdIOIntWriteMetaAsync;
|
---|
| 3673 | pDisk->VDIIOIntCallbacks.pfnMetaXferRelease = vdIOIntMetaXferRelease;
|
---|
| 3674 | pDisk->VDIIOIntCallbacks.pfnFlushAsync = vdIOIntFlushAsync;
|
---|
| 3675 | pDisk->VDIIOIntCallbacks.pfnIoCtxCopyFrom = vdIOIntIoCtxCopyFrom;
|
---|
| 3676 | pDisk->VDIIOIntCallbacks.pfnIoCtxCopyTo = vdIOIntIoCtxCopyTo;
|
---|
| 3677 | pDisk->VDIIOIntCallbacks.pfnIoCtxSet = vdIOIntIoCtxSet;
|
---|
| 3678 | pDisk->VDIIOIntCallbacks.pfnIoCtxSegArrayCreate = vdIOIntIoCtxSegArrayCreate;
|
---|
| 3679 | pDisk->VDIIOIntCallbacks.pfnIoCtxCompleted = vdIOIntIoCtxCompleted;
|
---|
[27808] | 3680 |
|
---|
[7277] | 3681 | *ppDisk = pDisk;
|
---|
[2379] | 3682 | }
|
---|
[7277] | 3683 | else
|
---|
[6291] | 3684 | {
|
---|
[7277] | 3685 | rc = VERR_NO_MEMORY;
|
---|
| 3686 | break;
|
---|
[4522] | 3687 | }
|
---|
[6291] | 3688 | } while (0);
|
---|
[2379] | 3689 |
|
---|
[11284] | 3690 | LogFlowFunc(("returns %Rrc (pDisk=%#p)\n", rc, pDisk));
|
---|
[2379] | 3691 | return rc;
|
---|
| 3692 | }
|
---|
| 3693 |
|
---|
| 3694 | /**
|
---|
[6291] | 3695 | * Destroys HDD container.
|
---|
| 3696 | * If container has opened image files they will be closed.
|
---|
[5101] | 3697 | *
|
---|
[6291] | 3698 | * @param pDisk Pointer to HDD container.
|
---|
| 3699 | */
|
---|
| 3700 | VBOXDDU_DECL(void) VDDestroy(PVBOXHDD pDisk)
|
---|
| 3701 | {
|
---|
| 3702 | LogFlowFunc(("pDisk=%#p\n", pDisk));
|
---|
| 3703 | do
|
---|
| 3704 | {
|
---|
| 3705 | /* sanity check */
|
---|
[8594] | 3706 | AssertPtrBreak(pDisk);
|
---|
[6291] | 3707 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
[8569] | 3708 | VDCloseAll(pDisk);
|
---|
[27808] | 3709 | RTMemCacheDestroy(pDisk->hMemCacheIoCtx);
|
---|
[27977] | 3710 | RTMemCacheDestroy(pDisk->hMemCacheIoTask);
|
---|
[8569] | 3711 | RTMemFree(pDisk);
|
---|
[6291] | 3712 | } while (0);
|
---|
| 3713 | LogFlowFunc(("returns\n"));
|
---|
| 3714 | }
|
---|
| 3715 |
|
---|
| 3716 | /**
|
---|
| 3717 | * Try to get the backend name which can use this image.
|
---|
| 3718 | *
|
---|
[5101] | 3719 | * @returns VBox status code.
|
---|
[7967] | 3720 | * VINF_SUCCESS if a plugin was found.
|
---|
[6195] | 3721 | * ppszFormat contains the string which can be used as backend name.
|
---|
[7900] | 3722 | * VERR_NOT_SUPPORTED if no backend was found.
|
---|
[22982] | 3723 | * @param pVDIfsDisk Pointer to the per-disk VD interface list.
|
---|
[32536] | 3724 | * @param pVDIfsImage Pointer to the per-image VD interface list.
|
---|
[5101] | 3725 | * @param pszFilename Name of the image file for which the backend is queried.
|
---|
[6291] | 3726 | * @param ppszFormat Receives pointer of the UTF-8 string which contains the format name.
|
---|
| 3727 | * The returned pointer must be freed using RTStrFree().
|
---|
[5101] | 3728 | */
|
---|
[32536] | 3729 | VBOXDDU_DECL(int) VDGetFormat(PVDINTERFACE pVDIfsDisk, PVDINTERFACE pVDIfsImage,
|
---|
| 3730 | const char *pszFilename, char **ppszFormat)
|
---|
[5101] | 3731 | {
|
---|
| 3732 | int rc = VERR_NOT_SUPPORTED;
|
---|
[32553] | 3733 | VDINTERFACEIOINT VDIIOIntCallbacks;
|
---|
| 3734 | VDINTERFACE VDIIOInt;
|
---|
| 3735 | VDINTERFACEIO VDIIOCallbacksFallback;
|
---|
| 3736 | PVDINTERFACE pInterfaceIO;
|
---|
| 3737 | PVDINTERFACEIO pInterfaceIOCallbacks;
|
---|
[5101] | 3738 |
|
---|
[6291] | 3739 | LogFlowFunc(("pszFilename=\"%s\"\n", pszFilename));
|
---|
[14852] | 3740 | /* Check arguments. */
|
---|
| 3741 | AssertMsgReturn(VALID_PTR(pszFilename) && *pszFilename,
|
---|
| 3742 | ("pszFilename=%#p \"%s\"\n", pszFilename, pszFilename),
|
---|
| 3743 | VERR_INVALID_PARAMETER);
|
---|
| 3744 | AssertMsgReturn(VALID_PTR(ppszFormat),
|
---|
| 3745 | ("ppszFormat=%#p\n", ppszFormat),
|
---|
| 3746 | VERR_INVALID_PARAMETER);
|
---|
| 3747 |
|
---|
| 3748 | if (!g_apBackends)
|
---|
| 3749 | VDInit();
|
---|
| 3750 |
|
---|
[32553] | 3751 | pInterfaceIO = VDInterfaceGet(pVDIfsImage, VDINTERFACETYPE_IO);
|
---|
| 3752 | if (!pInterfaceIO)
|
---|
[32536] | 3753 | {
|
---|
[32553] | 3754 | /*
|
---|
| 3755 | * Caller doesn't provide an I/O interface, create our own using the
|
---|
| 3756 | * native file API.
|
---|
| 3757 | */
|
---|
| 3758 | VDIIOCallbacksFallback.cbSize = sizeof(VDINTERFACEIO);
|
---|
| 3759 | VDIIOCallbacksFallback.enmInterface = VDINTERFACETYPE_IO;
|
---|
| 3760 | VDIIOCallbacksFallback.pfnOpen = vdIOOpenFallback;
|
---|
| 3761 | VDIIOCallbacksFallback.pfnClose = vdIOCloseFallback;
|
---|
| 3762 | VDIIOCallbacksFallback.pfnDelete = vdIODeleteFallback;
|
---|
| 3763 | VDIIOCallbacksFallback.pfnMove = vdIOMoveFallback;
|
---|
| 3764 | VDIIOCallbacksFallback.pfnGetFreeSpace = vdIOGetFreeSpaceFallback;
|
---|
| 3765 | VDIIOCallbacksFallback.pfnGetModificationTime = vdIOGetModificationTimeFallback;
|
---|
| 3766 | VDIIOCallbacksFallback.pfnGetSize = vdIOGetSizeFallback;
|
---|
| 3767 | VDIIOCallbacksFallback.pfnSetSize = vdIOSetSizeFallback;
|
---|
| 3768 | VDIIOCallbacksFallback.pfnReadSync = vdIOReadSyncFallback;
|
---|
| 3769 | VDIIOCallbacksFallback.pfnWriteSync = vdIOWriteSyncFallback;
|
---|
| 3770 | VDIIOCallbacksFallback.pfnFlushSync = vdIOFlushSyncFallback;
|
---|
| 3771 | pInterfaceIOCallbacks = &VDIIOCallbacksFallback;
|
---|
[32536] | 3772 | }
|
---|
[32553] | 3773 | else
|
---|
| 3774 | pInterfaceIOCallbacks = VDGetInterfaceIO(pInterfaceIO);
|
---|
[22982] | 3775 |
|
---|
[32691] | 3776 | /* Set up the internal I/O interface. */
|
---|
| 3777 | AssertReturn(!VDInterfaceGet(pVDIfsImage, VDINTERFACETYPE_IOINT),
|
---|
| 3778 | VERR_INVALID_PARAMETER);
|
---|
[32553] | 3779 | VDIIOIntCallbacks.cbSize = sizeof(VDINTERFACEIOINT);
|
---|
| 3780 | VDIIOIntCallbacks.enmInterface = VDINTERFACETYPE_IOINT;
|
---|
| 3781 | VDIIOIntCallbacks.pfnOpen = vdIOIntOpenLimited;
|
---|
| 3782 | VDIIOIntCallbacks.pfnClose = vdIOIntCloseLimited;
|
---|
| 3783 | VDIIOIntCallbacks.pfnDelete = vdIOIntDeleteLimited;
|
---|
| 3784 | VDIIOIntCallbacks.pfnMove = vdIOIntMoveLimited;
|
---|
| 3785 | VDIIOIntCallbacks.pfnGetFreeSpace = vdIOIntGetFreeSpaceLimited;
|
---|
| 3786 | VDIIOIntCallbacks.pfnGetModificationTime = vdIOIntGetModificationTimeLimited;
|
---|
| 3787 | VDIIOIntCallbacks.pfnGetSize = vdIOIntGetSizeLimited;
|
---|
| 3788 | VDIIOIntCallbacks.pfnSetSize = vdIOIntSetSizeLimited;
|
---|
| 3789 | VDIIOIntCallbacks.pfnReadSync = vdIOIntReadSyncLimited;
|
---|
| 3790 | VDIIOIntCallbacks.pfnWriteSync = vdIOIntWriteSyncLimited;
|
---|
| 3791 | VDIIOIntCallbacks.pfnFlushSync = vdIOIntFlushSyncLimited;
|
---|
| 3792 | VDIIOIntCallbacks.pfnReadUserAsync = NULL;
|
---|
| 3793 | VDIIOIntCallbacks.pfnWriteUserAsync = NULL;
|
---|
| 3794 | VDIIOIntCallbacks.pfnReadMetaAsync = NULL;
|
---|
| 3795 | VDIIOIntCallbacks.pfnWriteMetaAsync = NULL;
|
---|
| 3796 | VDIIOIntCallbacks.pfnFlushAsync = NULL;
|
---|
| 3797 | rc = VDInterfaceAdd(&VDIIOInt, "VD_IOINT", VDINTERFACETYPE_IOINT,
|
---|
| 3798 | &VDIIOIntCallbacks, pInterfaceIOCallbacks, &pVDIfsImage);
|
---|
| 3799 | AssertRC(rc);
|
---|
| 3800 |
|
---|
[14852] | 3801 | /* Find the backend supporting this file format. */
|
---|
| 3802 | for (unsigned i = 0; i < g_cBackends; i++)
|
---|
[6291] | 3803 | {
|
---|
[14852] | 3804 | if (g_apBackends[i]->pfnCheckIfValid)
|
---|
[6291] | 3805 | {
|
---|
[32536] | 3806 | rc = g_apBackends[i]->pfnCheckIfValid(pszFilename, pVDIfsDisk,
|
---|
| 3807 | pVDIfsImage);
|
---|
[15366] | 3808 | if ( RT_SUCCESS(rc)
|
---|
| 3809 | /* The correct backend has been found, but there is a small
|
---|
| 3810 | * incompatibility so that the file cannot be used. Stop here
|
---|
| 3811 | * and signal success - the actual open will of course fail,
|
---|
| 3812 | * but that will create a really sensible error message. */
|
---|
| 3813 | || ( rc != VERR_VD_GEN_INVALID_HEADER
|
---|
| 3814 | && rc != VERR_VD_VDI_INVALID_HEADER
|
---|
| 3815 | && rc != VERR_VD_VMDK_INVALID_HEADER
|
---|
| 3816 | && rc != VERR_VD_ISCSI_INVALID_HEADER
|
---|
| 3817 | && rc != VERR_VD_VHD_INVALID_HEADER
|
---|
[32536] | 3818 | && rc != VERR_VD_RAW_INVALID_HEADER
|
---|
[32604] | 3819 | && rc != VERR_VD_PARALLELS_INVALID_HEADER
|
---|
[32536] | 3820 | && rc != VERR_VD_DMG_INVALID_HEADER))
|
---|
[6291] | 3821 | {
|
---|
[14852] | 3822 | /* Copy the name into the new string. */
|
---|
| 3823 | char *pszFormat = RTStrDup(g_apBackends[i]->pszBackendName);
|
---|
| 3824 | if (!pszFormat)
|
---|
[6291] | 3825 | {
|
---|
[14852] | 3826 | rc = VERR_NO_MEMORY;
|
---|
[6291] | 3827 | break;
|
---|
| 3828 | }
|
---|
[14852] | 3829 | *ppszFormat = pszFormat;
|
---|
| 3830 | rc = VINF_SUCCESS;
|
---|
[6291] | 3831 | break;
|
---|
[11781] | 3832 | }
|
---|
[15366] | 3833 | rc = VERR_NOT_SUPPORTED;
|
---|
[5101] | 3834 | }
|
---|
[14852] | 3835 | }
|
---|
[7900] | 3836 |
|
---|
[32370] | 3837 | /* Try the cache backends. */
|
---|
| 3838 | if (rc == VERR_NOT_SUPPORTED)
|
---|
| 3839 | {
|
---|
| 3840 | for (unsigned i = 0; i < g_cCacheBackends; i++)
|
---|
| 3841 | {
|
---|
| 3842 | if (g_apCacheBackends[i]->pfnProbe)
|
---|
| 3843 | {
|
---|
[32536] | 3844 | rc = g_apCacheBackends[i]->pfnProbe(pszFilename, pVDIfsDisk,
|
---|
| 3845 | pVDIfsImage);
|
---|
[32370] | 3846 | if ( RT_SUCCESS(rc)
|
---|
| 3847 | || (rc != VERR_VD_GEN_INVALID_HEADER))
|
---|
| 3848 | {
|
---|
| 3849 | /* Copy the name into the new string. */
|
---|
| 3850 | char *pszFormat = RTStrDup(g_apBackends[i]->pszBackendName);
|
---|
| 3851 | if (!pszFormat)
|
---|
| 3852 | {
|
---|
| 3853 | rc = VERR_NO_MEMORY;
|
---|
| 3854 | break;
|
---|
| 3855 | }
|
---|
| 3856 | *ppszFormat = pszFormat;
|
---|
| 3857 | rc = VINF_SUCCESS;
|
---|
| 3858 | break;
|
---|
| 3859 | }
|
---|
| 3860 | rc = VERR_NOT_SUPPORTED;
|
---|
| 3861 | }
|
---|
| 3862 | }
|
---|
| 3863 | }
|
---|
| 3864 |
|
---|
[11284] | 3865 | LogFlowFunc(("returns %Rrc *ppszFormat=\"%s\"\n", rc, *ppszFormat));
|
---|
[5101] | 3866 | return rc;
|
---|
| 3867 | }
|
---|
| 3868 |
|
---|
| 3869 | /**
|
---|
[2379] | 3870 | * Opens an image file.
|
---|
| 3871 | *
|
---|
[6291] | 3872 | * The first opened image file in HDD container must have a base image type,
|
---|
[2379] | 3873 | * others (next opened images) must be a differencing or undo images.
|
---|
| 3874 | * Linkage is checked for differencing image to be in consistence with the previously opened image.
|
---|
| 3875 | * When another differencing image is opened and the last image was opened in read/write access
|
---|
| 3876 | * mode, then the last image is reopened in read-only with deny write sharing mode. This allows
|
---|
| 3877 | * other processes to use images in read-only mode too.
|
---|
| 3878 | *
|
---|
[6291] | 3879 | * Note that the image is opened in read-only mode if a read/write open is not possible.
|
---|
[2379] | 3880 | * Use VDIsReadOnly to check open mode.
|
---|
| 3881 | *
|
---|
| 3882 | * @returns VBox status code.
|
---|
[6291] | 3883 | * @param pDisk Pointer to HDD container.
|
---|
[7277] | 3884 | * @param pszBackend Name of the image file backend to use.
|
---|
[2379] | 3885 | * @param pszFilename Name of the image file to open.
|
---|
| 3886 | * @param uOpenFlags Image file open mode, see VD_OPEN_FLAGS_* constants.
|
---|
[11444] | 3887 | * @param pVDIfsImage Pointer to the per-image VD interface list.
|
---|
[2379] | 3888 | */
|
---|
[7277] | 3889 | VBOXDDU_DECL(int) VDOpen(PVBOXHDD pDisk, const char *pszBackend,
|
---|
[11444] | 3890 | const char *pszFilename, unsigned uOpenFlags,
|
---|
| 3891 | PVDINTERFACE pVDIfsImage)
|
---|
[2379] | 3892 | {
|
---|
| 3893 | int rc = VINF_SUCCESS;
|
---|
[27232] | 3894 | int rc2;
|
---|
| 3895 | bool fLockWrite = false;
|
---|
[6291] | 3896 | PVDIMAGE pImage = NULL;
|
---|
[2379] | 3897 |
|
---|
[14928] | 3898 | LogFlowFunc(("pDisk=%#p pszBackend=\"%s\" pszFilename=\"%s\" uOpenFlags=%#x, pVDIfsImage=%#p\n",
|
---|
[11444] | 3899 | pDisk, pszBackend, pszFilename, uOpenFlags, pVDIfsImage));
|
---|
[27232] | 3900 |
|
---|
[6291] | 3901 | do
|
---|
[2379] | 3902 | {
|
---|
[6291] | 3903 | /* sanity check */
|
---|
[8569] | 3904 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 3905 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
[2379] | 3906 |
|
---|
[6291] | 3907 | /* Check arguments. */
|
---|
[8565] | 3908 | AssertMsgBreakStmt(VALID_PTR(pszBackend) && *pszBackend,
|
---|
| 3909 | ("pszBackend=%#p \"%s\"\n", pszBackend, pszBackend),
|
---|
| 3910 | rc = VERR_INVALID_PARAMETER);
|
---|
| 3911 | AssertMsgBreakStmt(VALID_PTR(pszFilename) && *pszFilename,
|
---|
| 3912 | ("pszFilename=%#p \"%s\"\n", pszFilename, pszFilename),
|
---|
| 3913 | rc = VERR_INVALID_PARAMETER);
|
---|
| 3914 | AssertMsgBreakStmt((uOpenFlags & ~VD_OPEN_FLAGS_MASK) == 0,
|
---|
| 3915 | ("uOpenFlags=%#x\n", uOpenFlags),
|
---|
| 3916 | rc = VERR_INVALID_PARAMETER);
|
---|
[2833] | 3917 |
|
---|
[6291] | 3918 | /* Set up image descriptor. */
|
---|
| 3919 | pImage = (PVDIMAGE)RTMemAllocZ(sizeof(VDIMAGE));
|
---|
| 3920 | if (!pImage)
|
---|
| 3921 | {
|
---|
| 3922 | rc = VERR_NO_MEMORY;
|
---|
| 3923 | break;
|
---|
| 3924 | }
|
---|
| 3925 | pImage->pszFilename = RTStrDup(pszFilename);
|
---|
| 3926 | if (!pImage->pszFilename)
|
---|
| 3927 | {
|
---|
| 3928 | rc = VERR_NO_MEMORY;
|
---|
| 3929 | break;
|
---|
| 3930 | }
|
---|
[27808] | 3931 |
|
---|
[28620] | 3932 | pImage->pDisk = pDisk;
|
---|
[11444] | 3933 | pImage->pVDIfsImage = pVDIfsImage;
|
---|
[6291] | 3934 |
|
---|
[14852] | 3935 | rc = vdFindBackend(pszBackend, &pImage->Backend);
|
---|
[11266] | 3936 | if (RT_FAILURE(rc))
|
---|
[7277] | 3937 | break;
|
---|
| 3938 | if (!pImage->Backend)
|
---|
| 3939 | {
|
---|
| 3940 | rc = vdError(pDisk, VERR_INVALID_PARAMETER, RT_SRC_POS,
|
---|
| 3941 | N_("VD: unknown backend name '%s'"), pszBackend);
|
---|
| 3942 | break;
|
---|
| 3943 | }
|
---|
| 3944 |
|
---|
[32691] | 3945 | /* Set up the I/O interface. */
|
---|
| 3946 | pImage->pInterfaceIO = VDInterfaceGet(pVDIfsImage, VDINTERFACETYPE_IO);
|
---|
| 3947 | if (pImage->pInterfaceIO)
|
---|
| 3948 | pImage->pInterfaceIOCallbacks = VDGetInterfaceIO(pImage->pInterfaceIO);
|
---|
| 3949 | else
|
---|
[32536] | 3950 | {
|
---|
[32691] | 3951 | rc = VDInterfaceAdd(&pImage->VDIIO, "VD_IO", VDINTERFACETYPE_IO,
|
---|
| 3952 | &pDisk->VDIIOCallbacks, pDisk, &pVDIfsImage);
|
---|
| 3953 | pImage->pInterfaceIO = &pImage->VDIIO;
|
---|
| 3954 | pImage->pInterfaceIOCallbacks = &pDisk->VDIIOCallbacks;
|
---|
[32536] | 3955 | }
|
---|
[28620] | 3956 |
|
---|
[32691] | 3957 | /* Set up the internal I/O interface. */
|
---|
| 3958 | AssertBreakStmt(!VDInterfaceGet(pVDIfsImage, VDINTERFACETYPE_IOINT),
|
---|
| 3959 | rc = VERR_INVALID_PARAMETER);
|
---|
| 3960 | rc = VDInterfaceAdd(&pImage->VDIIOInt, "VD_IOINT", VDINTERFACETYPE_IOINT,
|
---|
| 3961 | &pDisk->VDIIOIntCallbacks, pImage, &pImage->pVDIfsImage);
|
---|
| 3962 | AssertRC(rc);
|
---|
| 3963 |
|
---|
[2590] | 3964 | pImage->uOpenFlags = uOpenFlags & VD_OPEN_FLAGS_HONOR_SAME;
|
---|
[7277] | 3965 | rc = pImage->Backend->pfnOpen(pImage->pszFilename,
|
---|
| 3966 | uOpenFlags & ~VD_OPEN_FLAGS_HONOR_SAME,
|
---|
[11444] | 3967 | pDisk->pVDIfsDisk,
|
---|
| 3968 | pImage->pVDIfsImage,
|
---|
[32536] | 3969 | &pImage->pBackendData);
|
---|
[6291] | 3970 | /* If the open in read-write mode failed, retry in read-only mode. */
|
---|
[11266] | 3971 | if (RT_FAILURE(rc))
|
---|
[6291] | 3972 | {
|
---|
| 3973 | if (!(uOpenFlags & VD_OPEN_FLAGS_READONLY)
|
---|
[24887] | 3974 | && ( rc == VERR_ACCESS_DENIED
|
---|
[6291] | 3975 | || rc == VERR_PERMISSION_DENIED
|
---|
| 3976 | || rc == VERR_WRITE_PROTECT
|
---|
| 3977 | || rc == VERR_SHARING_VIOLATION
|
---|
| 3978 | || rc == VERR_FILE_LOCK_FAILED))
|
---|
[7277] | 3979 | rc = pImage->Backend->pfnOpen(pImage->pszFilename,
|
---|
| 3980 | (uOpenFlags & ~VD_OPEN_FLAGS_HONOR_SAME)
|
---|
| 3981 | | VD_OPEN_FLAGS_READONLY,
|
---|
[11444] | 3982 | pDisk->pVDIfsDisk,
|
---|
| 3983 | pImage->pVDIfsImage,
|
---|
[32536] | 3984 | &pImage->pBackendData);
|
---|
[11266] | 3985 | if (RT_FAILURE(rc))
|
---|
[6291] | 3986 | {
|
---|
| 3987 | rc = vdError(pDisk, rc, RT_SRC_POS,
|
---|
[24887] | 3988 | N_("VD: error %Rrc opening image file '%s'"), rc, pszFilename);
|
---|
[6291] | 3989 | break;
|
---|
| 3990 | }
|
---|
| 3991 | }
|
---|
[2379] | 3992 |
|
---|
[27232] | 3993 | /* Lock disk for writing, as we modify pDisk information below. */
|
---|
| 3994 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 3995 | AssertRC(rc2);
|
---|
| 3996 | fLockWrite = true;
|
---|
| 3997 |
|
---|
[9560] | 3998 | /* Check image type. As the image itself has only partial knowledge
|
---|
| 3999 | * whether it's a base image or not, this info is derived here. The
|
---|
| 4000 | * base image can be fixed or normal, all others must be normal or
|
---|
| 4001 | * diff images. Some image formats don't distinguish between normal
|
---|
| 4002 | * and diff images, so this must be corrected here. */
|
---|
[27232] | 4003 | unsigned uImageFlags;
|
---|
[32536] | 4004 | uImageFlags = pImage->Backend->pfnGetImageFlags(pImage->pBackendData);
|
---|
[11266] | 4005 | if (RT_FAILURE(rc))
|
---|
[17970] | 4006 | uImageFlags = VD_IMAGE_FLAGS_NONE;
|
---|
[11266] | 4007 | if ( RT_SUCCESS(rc)
|
---|
[9560] | 4008 | && !(uOpenFlags & VD_OPEN_FLAGS_INFO))
|
---|
[6291] | 4009 | {
|
---|
[9565] | 4010 | if ( pDisk->cImages == 0
|
---|
[17970] | 4011 | && (uImageFlags & VD_IMAGE_FLAGS_DIFF))
|
---|
[9560] | 4012 | {
|
---|
[15366] | 4013 | rc = VERR_VD_INVALID_TYPE;
|
---|
[9560] | 4014 | break;
|
---|
| 4015 | }
|
---|
[9565] | 4016 | else if (pDisk->cImages != 0)
|
---|
| 4017 | {
|
---|
[17970] | 4018 | if (uImageFlags & VD_IMAGE_FLAGS_FIXED)
|
---|
[9565] | 4019 | {
|
---|
[15366] | 4020 | rc = VERR_VD_INVALID_TYPE;
|
---|
[9565] | 4021 | break;
|
---|
| 4022 | }
|
---|
| 4023 | else
|
---|
[17970] | 4024 | uImageFlags |= VD_IMAGE_FLAGS_DIFF;
|
---|
[9565] | 4025 | }
|
---|
[9560] | 4026 | }
|
---|
[31258] | 4027 |
|
---|
| 4028 | /* Ensure we always get correct diff information, even if the backend
|
---|
| 4029 | * doesn't actually have a stored flag for this. It must not return
|
---|
| 4030 | * bogus information for the parent UUID if it is not a diff image. */
|
---|
| 4031 | RTUUID parentUuid;
|
---|
| 4032 | RTUuidClear(&parentUuid);
|
---|
[32536] | 4033 | rc2 = pImage->Backend->pfnGetParentUuid(pImage->pBackendData, &parentUuid);
|
---|
[31258] | 4034 | if (RT_SUCCESS(rc2) && !RTUuidIsNull(&parentUuid))
|
---|
| 4035 | uImageFlags |= VD_IMAGE_FLAGS_DIFF;
|
---|
| 4036 |
|
---|
[17970] | 4037 | pImage->uImageFlags = uImageFlags;
|
---|
[2379] | 4038 |
|
---|
[7900] | 4039 | /* Force sane optimization settings. It's not worth avoiding writes
|
---|
| 4040 | * to fixed size images. The overhead would have almost no payback. */
|
---|
[17970] | 4041 | if (uImageFlags & VD_IMAGE_FLAGS_FIXED)
|
---|
[7900] | 4042 | pImage->uOpenFlags |= VD_OPEN_FLAGS_HONOR_SAME;
|
---|
| 4043 |
|
---|
[2564] | 4044 | /** @todo optionally check UUIDs */
|
---|
| 4045 |
|
---|
[6291] | 4046 | /* Cache disk information. */
|
---|
[32536] | 4047 | pDisk->cbSize = pImage->Backend->pfnGetSize(pImage->pBackendData);
|
---|
[2379] | 4048 |
|
---|
[6291] | 4049 | /* Cache PCHS geometry. */
|
---|
[32536] | 4050 | rc2 = pImage->Backend->pfnGetPCHSGeometry(pImage->pBackendData,
|
---|
[7277] | 4051 | &pDisk->PCHSGeometry);
|
---|
[11266] | 4052 | if (RT_FAILURE(rc2))
|
---|
[6291] | 4053 | {
|
---|
| 4054 | pDisk->PCHSGeometry.cCylinders = 0;
|
---|
| 4055 | pDisk->PCHSGeometry.cHeads = 0;
|
---|
| 4056 | pDisk->PCHSGeometry.cSectors = 0;
|
---|
[2379] | 4057 | }
|
---|
[6291] | 4058 | else
|
---|
| 4059 | {
|
---|
| 4060 | /* Make sure the PCHS geometry is properly clipped. */
|
---|
| 4061 | pDisk->PCHSGeometry.cCylinders = RT_MIN(pDisk->PCHSGeometry.cCylinders, 16383);
|
---|
| 4062 | pDisk->PCHSGeometry.cHeads = RT_MIN(pDisk->PCHSGeometry.cHeads, 16);
|
---|
| 4063 | pDisk->PCHSGeometry.cSectors = RT_MIN(pDisk->PCHSGeometry.cSectors, 63);
|
---|
| 4064 | }
|
---|
[2379] | 4065 |
|
---|
[6291] | 4066 | /* Cache LCHS geometry. */
|
---|
[32536] | 4067 | rc2 = pImage->Backend->pfnGetLCHSGeometry(pImage->pBackendData,
|
---|
[7277] | 4068 | &pDisk->LCHSGeometry);
|
---|
[11266] | 4069 | if (RT_FAILURE(rc2))
|
---|
[2379] | 4070 | {
|
---|
[6291] | 4071 | pDisk->LCHSGeometry.cCylinders = 0;
|
---|
| 4072 | pDisk->LCHSGeometry.cHeads = 0;
|
---|
| 4073 | pDisk->LCHSGeometry.cSectors = 0;
|
---|
| 4074 | }
|
---|
| 4075 | else
|
---|
| 4076 | {
|
---|
| 4077 | /* Make sure the LCHS geometry is properly clipped. */
|
---|
| 4078 | pDisk->LCHSGeometry.cHeads = RT_MIN(pDisk->LCHSGeometry.cHeads, 255);
|
---|
| 4079 | pDisk->LCHSGeometry.cSectors = RT_MIN(pDisk->LCHSGeometry.cSectors, 63);
|
---|
| 4080 | }
|
---|
| 4081 |
|
---|
| 4082 | if (pDisk->cImages != 0)
|
---|
| 4083 | {
|
---|
[2379] | 4084 | /* Switch previous image to read-only mode. */
|
---|
| 4085 | unsigned uOpenFlagsPrevImg;
|
---|
[32536] | 4086 | uOpenFlagsPrevImg = pDisk->pLast->Backend->pfnGetOpenFlags(pDisk->pLast->pBackendData);
|
---|
[2379] | 4087 | if (!(uOpenFlagsPrevImg & VD_OPEN_FLAGS_READONLY))
|
---|
| 4088 | {
|
---|
| 4089 | uOpenFlagsPrevImg |= VD_OPEN_FLAGS_READONLY;
|
---|
[32536] | 4090 | rc = pDisk->pLast->Backend->pfnSetOpenFlags(pDisk->pLast->pBackendData, uOpenFlagsPrevImg);
|
---|
[2379] | 4091 | }
|
---|
| 4092 | }
|
---|
| 4093 |
|
---|
[11266] | 4094 | if (RT_SUCCESS(rc))
|
---|
[2379] | 4095 | {
|
---|
| 4096 | /* Image successfully opened, make it the last image. */
|
---|
| 4097 | vdAddImageToList(pDisk, pImage);
|
---|
[7900] | 4098 | if (!(uOpenFlags & VD_OPEN_FLAGS_READONLY))
|
---|
| 4099 | pDisk->uModified = VD_IMAGE_MODIFIED_FIRST;
|
---|
[2379] | 4100 | }
|
---|
[2650] | 4101 | else
|
---|
[2379] | 4102 | {
|
---|
| 4103 | /* Error detected, but image opened. Close image. */
|
---|
[32536] | 4104 | rc2 = pImage->Backend->pfnClose(pImage->pBackendData, false);
|
---|
[2379] | 4105 | AssertRC(rc2);
|
---|
[32536] | 4106 | pImage->pBackendData = NULL;
|
---|
[2379] | 4107 | }
|
---|
[6291] | 4108 | } while (0);
|
---|
[2379] | 4109 |
|
---|
[27232] | 4110 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 4111 | {
|
---|
| 4112 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 4113 | AssertRC(rc2);
|
---|
| 4114 | }
|
---|
| 4115 |
|
---|
[11266] | 4116 | if (RT_FAILURE(rc))
|
---|
[2379] | 4117 | {
|
---|
| 4118 | if (pImage)
|
---|
| 4119 | {
|
---|
| 4120 | if (pImage->pszFilename)
|
---|
| 4121 | RTStrFree(pImage->pszFilename);
|
---|
| 4122 | RTMemFree(pImage);
|
---|
| 4123 | }
|
---|
| 4124 | }
|
---|
| 4125 |
|
---|
[11284] | 4126 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[2379] | 4127 | return rc;
|
---|
| 4128 | }
|
---|
| 4129 |
|
---|
| 4130 | /**
|
---|
[32370] | 4131 | * Opens a cache image.
|
---|
| 4132 | *
|
---|
| 4133 | * @return VBox status code.
|
---|
| 4134 | * @param pDisk Pointer to the HDD container which should use the cache image.
|
---|
| 4135 | * @param pszBackend Name of the cache file backend to use (case insensitive).
|
---|
| 4136 | * @param pszFilename Name of the cache image to open.
|
---|
| 4137 | * @param uOpenFlags Image file open mode, see VD_OPEN_FLAGS_* constants.
|
---|
| 4138 | * @param pVDIfsCache Pointer to the per-cache VD interface list.
|
---|
| 4139 | */
|
---|
| 4140 | VBOXDDU_DECL(int) VDCacheOpen(PVBOXHDD pDisk, const char *pszBackend,
|
---|
| 4141 | const char *pszFilename, unsigned uOpenFlags,
|
---|
| 4142 | PVDINTERFACE pVDIfsCache)
|
---|
| 4143 | {
|
---|
| 4144 | int rc = VINF_SUCCESS;
|
---|
| 4145 | int rc2;
|
---|
| 4146 | bool fLockWrite = false;
|
---|
| 4147 | PVDCACHE pCache = NULL;
|
---|
| 4148 |
|
---|
| 4149 | LogFlowFunc(("pDisk=%#p pszBackend=\"%s\" pszFilename=\"%s\" uOpenFlags=%#x, pVDIfsCache=%#p\n",
|
---|
| 4150 | pDisk, pszBackend, pszFilename, uOpenFlags, pVDIfsCache));
|
---|
| 4151 |
|
---|
| 4152 | do
|
---|
| 4153 | {
|
---|
| 4154 | /* sanity check */
|
---|
| 4155 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
| 4156 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 4157 |
|
---|
| 4158 | /* Check arguments. */
|
---|
| 4159 | AssertMsgBreakStmt(VALID_PTR(pszBackend) && *pszBackend,
|
---|
| 4160 | ("pszBackend=%#p \"%s\"\n", pszBackend, pszBackend),
|
---|
| 4161 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4162 | AssertMsgBreakStmt(VALID_PTR(pszFilename) && *pszFilename,
|
---|
| 4163 | ("pszFilename=%#p \"%s\"\n", pszFilename, pszFilename),
|
---|
| 4164 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4165 | AssertMsgBreakStmt((uOpenFlags & ~VD_OPEN_FLAGS_MASK) == 0,
|
---|
| 4166 | ("uOpenFlags=%#x\n", uOpenFlags),
|
---|
| 4167 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4168 |
|
---|
| 4169 | /* Set up image descriptor. */
|
---|
| 4170 | pCache = (PVDCACHE)RTMemAllocZ(sizeof(VDCACHE));
|
---|
| 4171 | if (!pCache)
|
---|
| 4172 | {
|
---|
| 4173 | rc = VERR_NO_MEMORY;
|
---|
| 4174 | break;
|
---|
| 4175 | }
|
---|
| 4176 | pCache->pszFilename = RTStrDup(pszFilename);
|
---|
| 4177 | if (!pCache->pszFilename)
|
---|
| 4178 | {
|
---|
| 4179 | rc = VERR_NO_MEMORY;
|
---|
| 4180 | break;
|
---|
| 4181 | }
|
---|
| 4182 |
|
---|
| 4183 | pCache->pDisk = pDisk;
|
---|
| 4184 | pCache->pVDIfsCache = pVDIfsCache;
|
---|
| 4185 |
|
---|
| 4186 | rc = vdFindCacheBackend(pszBackend, &pCache->Backend);
|
---|
| 4187 | if (RT_FAILURE(rc))
|
---|
| 4188 | break;
|
---|
| 4189 | if (!pCache->Backend)
|
---|
| 4190 | {
|
---|
| 4191 | rc = vdError(pDisk, VERR_INVALID_PARAMETER, RT_SRC_POS,
|
---|
| 4192 | N_("VD: unknown backend name '%s'"), pszBackend);
|
---|
| 4193 | break;
|
---|
| 4194 | }
|
---|
| 4195 |
|
---|
| 4196 | /* Set up the I/O interface. */
|
---|
[32691] | 4197 | pCache->pInterfaceIO = VDInterfaceGet(pVDIfsCache, VDINTERFACETYPE_IO);
|
---|
| 4198 | if (pCache->pInterfaceIO)
|
---|
| 4199 | pCache->pInterfaceIOCallbacks = VDGetInterfaceIO(pCache->pInterfaceIO);
|
---|
| 4200 | else
|
---|
| 4201 | {
|
---|
| 4202 | rc = VDInterfaceAdd(&pCache->VDIIO, "VD_IO", VDINTERFACETYPE_IO,
|
---|
| 4203 | &pDisk->VDIIOCallbacks, pDisk, &pVDIfsCache);
|
---|
| 4204 | pCache->pInterfaceIO = &pCache->VDIIO;
|
---|
| 4205 | pCache->pInterfaceIOCallbacks = &pDisk->VDIIOCallbacks;
|
---|
| 4206 | }
|
---|
| 4207 |
|
---|
| 4208 | /* Set up the internal I/O interface. */
|
---|
| 4209 | AssertBreakStmt(!VDInterfaceGet(pVDIfsCache, VDINTERFACETYPE_IOINT),
|
---|
| 4210 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4211 | rc = VDInterfaceAdd(&pCache->VDIIOInt, "VD_IOINT", VDINTERFACETYPE_IOINT,
|
---|
[32553] | 4212 | &pDisk->VDIIOIntCallbacks, pCache, &pCache->pVDIfsCache);
|
---|
[32370] | 4213 | AssertRC(rc);
|
---|
| 4214 |
|
---|
| 4215 | pCache->uOpenFlags = uOpenFlags & VD_OPEN_FLAGS_HONOR_SAME;
|
---|
| 4216 | rc = pCache->Backend->pfnOpen(pCache->pszFilename,
|
---|
| 4217 | uOpenFlags & ~VD_OPEN_FLAGS_HONOR_SAME,
|
---|
| 4218 | pDisk->pVDIfsDisk,
|
---|
| 4219 | pCache->pVDIfsCache,
|
---|
[32536] | 4220 | &pCache->pBackendData);
|
---|
[32370] | 4221 | /* If the open in read-write mode failed, retry in read-only mode. */
|
---|
| 4222 | if (RT_FAILURE(rc))
|
---|
| 4223 | {
|
---|
| 4224 | if (!(uOpenFlags & VD_OPEN_FLAGS_READONLY)
|
---|
| 4225 | && ( rc == VERR_ACCESS_DENIED
|
---|
| 4226 | || rc == VERR_PERMISSION_DENIED
|
---|
| 4227 | || rc == VERR_WRITE_PROTECT
|
---|
| 4228 | || rc == VERR_SHARING_VIOLATION
|
---|
| 4229 | || rc == VERR_FILE_LOCK_FAILED))
|
---|
| 4230 | rc = pCache->Backend->pfnOpen(pCache->pszFilename,
|
---|
| 4231 | (uOpenFlags & ~VD_OPEN_FLAGS_HONOR_SAME)
|
---|
| 4232 | | VD_OPEN_FLAGS_READONLY,
|
---|
| 4233 | pDisk->pVDIfsDisk,
|
---|
| 4234 | pCache->pVDIfsCache,
|
---|
[32536] | 4235 | &pCache->pBackendData);
|
---|
[32370] | 4236 | if (RT_FAILURE(rc))
|
---|
| 4237 | {
|
---|
| 4238 | rc = vdError(pDisk, rc, RT_SRC_POS,
|
---|
| 4239 | N_("VD: error %Rrc opening image file '%s'"), rc, pszFilename);
|
---|
| 4240 | break;
|
---|
| 4241 | }
|
---|
| 4242 | }
|
---|
| 4243 |
|
---|
| 4244 | /* Lock disk for writing, as we modify pDisk information below. */
|
---|
| 4245 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 4246 | AssertRC(rc2);
|
---|
| 4247 | fLockWrite = true;
|
---|
| 4248 |
|
---|
| 4249 | /*
|
---|
| 4250 | * Check that the modification UUID of the cache and last image
|
---|
| 4251 | * match. If not the image was modified inbetween without the cache.
|
---|
| 4252 | * The cache might contain stale data.
|
---|
| 4253 | */
|
---|
| 4254 | RTUUID UuidImage, UuidCache;
|
---|
| 4255 |
|
---|
[32536] | 4256 | rc = pCache->Backend->pfnGetModificationUuid(pCache->pBackendData,
|
---|
[32370] | 4257 | &UuidCache);
|
---|
| 4258 | if (RT_SUCCESS(rc))
|
---|
| 4259 | {
|
---|
[32536] | 4260 | rc = pDisk->pLast->Backend->pfnGetModificationUuid(pDisk->pLast->pBackendData,
|
---|
[32370] | 4261 | &UuidImage);
|
---|
| 4262 | if (RT_SUCCESS(rc))
|
---|
| 4263 | {
|
---|
| 4264 | if (RTUuidCompare(&UuidImage, &UuidCache))
|
---|
| 4265 | rc = VERR_VD_CACHE_NOT_UP_TO_DATE;
|
---|
| 4266 | }
|
---|
| 4267 | }
|
---|
| 4268 |
|
---|
| 4269 | /*
|
---|
| 4270 | * We assume that the user knows what he is doing if one of the images
|
---|
| 4271 | * doesn't support the modification uuid.
|
---|
| 4272 | */
|
---|
| 4273 | if (rc == VERR_NOT_SUPPORTED)
|
---|
| 4274 | rc = VINF_SUCCESS;
|
---|
| 4275 |
|
---|
| 4276 | if (RT_SUCCESS(rc))
|
---|
| 4277 | {
|
---|
| 4278 | /* Cache successfully opened, make it the current one. */
|
---|
| 4279 | if (!pDisk->pCache)
|
---|
| 4280 | pDisk->pCache = pCache;
|
---|
| 4281 | else
|
---|
| 4282 | rc = VERR_VD_CACHE_ALREADY_EXISTS;
|
---|
| 4283 | }
|
---|
| 4284 |
|
---|
| 4285 | if (RT_FAILURE(rc))
|
---|
| 4286 | {
|
---|
| 4287 | /* Error detected, but image opened. Close image. */
|
---|
[32536] | 4288 | rc2 = pCache->Backend->pfnClose(pCache->pBackendData, false);
|
---|
[32370] | 4289 | AssertRC(rc2);
|
---|
[32536] | 4290 | pCache->pBackendData = NULL;
|
---|
[32370] | 4291 | }
|
---|
| 4292 | } while (0);
|
---|
| 4293 |
|
---|
| 4294 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 4295 | {
|
---|
| 4296 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 4297 | AssertRC(rc2);
|
---|
| 4298 | }
|
---|
| 4299 |
|
---|
| 4300 | if (RT_FAILURE(rc))
|
---|
| 4301 | {
|
---|
| 4302 | if (pCache)
|
---|
| 4303 | {
|
---|
| 4304 | if (pCache->pszFilename)
|
---|
| 4305 | RTStrFree(pCache->pszFilename);
|
---|
| 4306 | RTMemFree(pCache);
|
---|
| 4307 | }
|
---|
| 4308 | }
|
---|
| 4309 |
|
---|
| 4310 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
| 4311 | return rc;
|
---|
| 4312 | }
|
---|
| 4313 |
|
---|
| 4314 | /**
|
---|
[2379] | 4315 | * Creates and opens a new base image file.
|
---|
| 4316 | *
|
---|
| 4317 | * @returns VBox status code.
|
---|
[6291] | 4318 | * @param pDisk Pointer to HDD container.
|
---|
[7277] | 4319 | * @param pszBackend Name of the image file backend to use.
|
---|
[2379] | 4320 | * @param pszFilename Name of the image file to create.
|
---|
| 4321 | * @param cbSize Image size in bytes.
|
---|
| 4322 | * @param uImageFlags Flags specifying special image features.
|
---|
| 4323 | * @param pszComment Pointer to image comment. NULL is ok.
|
---|
[6291] | 4324 | * @param pPCHSGeometry Pointer to physical disk geometry <= (16383,16,63). Not NULL.
|
---|
[18557] | 4325 | * @param pLCHSGeometry Pointer to logical disk geometry <= (x,255,63). Not NULL.
|
---|
[11353] | 4326 | * @param pUuid New UUID of the image. If NULL, a new UUID is created.
|
---|
[2379] | 4327 | * @param uOpenFlags Image file open mode, see VD_OPEN_FLAGS_* constants.
|
---|
[11444] | 4328 | * @param pVDIfsImage Pointer to the per-image VD interface list.
|
---|
| 4329 | * @param pVDIfsOperation Pointer to the per-operation VD interface list.
|
---|
[2379] | 4330 | */
|
---|
[7277] | 4331 | VBOXDDU_DECL(int) VDCreateBase(PVBOXHDD pDisk, const char *pszBackend,
|
---|
[17970] | 4332 | const char *pszFilename, uint64_t cbSize,
|
---|
| 4333 | unsigned uImageFlags, const char *pszComment,
|
---|
[32536] | 4334 | PCVDGEOMETRY pPCHSGeometry,
|
---|
| 4335 | PCVDGEOMETRY pLCHSGeometry,
|
---|
[11353] | 4336 | PCRTUUID pUuid, unsigned uOpenFlags,
|
---|
[11444] | 4337 | PVDINTERFACE pVDIfsImage,
|
---|
| 4338 | PVDINTERFACE pVDIfsOperation)
|
---|
[2379] | 4339 | {
|
---|
[2564] | 4340 | int rc = VINF_SUCCESS;
|
---|
[27232] | 4341 | int rc2;
|
---|
| 4342 | bool fLockWrite = false, fLockRead = false;
|
---|
[6291] | 4343 | PVDIMAGE pImage = NULL;
|
---|
[11353] | 4344 | RTUUID uuid;
|
---|
[2564] | 4345 |
|
---|
[17970] | 4346 | LogFlowFunc(("pDisk=%#p pszBackend=\"%s\" pszFilename=\"%s\" cbSize=%llu uImageFlags=%#x pszComment=\"%s\" PCHS=%u/%u/%u LCHS=%u/%u/%u Uuid=%RTuuid uOpenFlags=%#x pVDIfsImage=%#p pVDIfsOperation=%#p\n",
|
---|
| 4347 | pDisk, pszBackend, pszFilename, cbSize, uImageFlags, pszComment,
|
---|
[6291] | 4348 | pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads,
|
---|
| 4349 | pPCHSGeometry->cSectors, pLCHSGeometry->cCylinders,
|
---|
[11353] | 4350 | pLCHSGeometry->cHeads, pLCHSGeometry->cSectors, pUuid,
|
---|
[11444] | 4351 | uOpenFlags, pVDIfsImage, pVDIfsOperation));
|
---|
| 4352 |
|
---|
| 4353 | PVDINTERFACE pIfProgress = VDInterfaceGet(pVDIfsOperation,
|
---|
| 4354 | VDINTERFACETYPE_PROGRESS);
|
---|
| 4355 | PVDINTERFACEPROGRESS pCbProgress = NULL;
|
---|
| 4356 | if (pIfProgress)
|
---|
| 4357 | pCbProgress = VDGetInterfaceProgress(pIfProgress);
|
---|
| 4358 |
|
---|
[6291] | 4359 | do
|
---|
[2564] | 4360 | {
|
---|
[6291] | 4361 | /* sanity check */
|
---|
[8569] | 4362 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 4363 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
[2564] | 4364 |
|
---|
[6291] | 4365 | /* Check arguments. */
|
---|
[8565] | 4366 | AssertMsgBreakStmt(VALID_PTR(pszBackend) && *pszBackend,
|
---|
| 4367 | ("pszBackend=%#p \"%s\"\n", pszBackend, pszBackend),
|
---|
| 4368 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4369 | AssertMsgBreakStmt(VALID_PTR(pszFilename) && *pszFilename,
|
---|
| 4370 | ("pszFilename=%#p \"%s\"\n", pszFilename, pszFilename),
|
---|
| 4371 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4372 | AssertMsgBreakStmt(cbSize,
|
---|
| 4373 | ("cbSize=%llu\n", cbSize),
|
---|
| 4374 | rc = VERR_INVALID_PARAMETER);
|
---|
[17970] | 4375 | AssertMsgBreakStmt( ((uImageFlags & ~VD_IMAGE_FLAGS_MASK) == 0)
|
---|
| 4376 | || ((uImageFlags & (VD_IMAGE_FLAGS_FIXED | VD_IMAGE_FLAGS_DIFF)) != VD_IMAGE_FLAGS_FIXED),
|
---|
[8565] | 4377 | ("uImageFlags=%#x\n", uImageFlags),
|
---|
| 4378 | rc = VERR_INVALID_PARAMETER);
|
---|
[7281] | 4379 | /* The PCHS geometry fields may be 0 to leave it for later. */
|
---|
[8565] | 4380 | AssertMsgBreakStmt( VALID_PTR(pPCHSGeometry)
|
---|
| 4381 | && pPCHSGeometry->cHeads <= 16
|
---|
| 4382 | && pPCHSGeometry->cSectors <= 63,
|
---|
| 4383 | ("pPCHSGeometry=%#p PCHS=%u/%u/%u\n", pPCHSGeometry,
|
---|
| 4384 | pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads,
|
---|
| 4385 | pPCHSGeometry->cSectors),
|
---|
| 4386 | rc = VERR_INVALID_PARAMETER);
|
---|
[6960] | 4387 | /* The LCHS geometry fields may be 0 to leave it to later autodetection. */
|
---|
[8565] | 4388 | AssertMsgBreakStmt( VALID_PTR(pLCHSGeometry)
|
---|
| 4389 | && pLCHSGeometry->cHeads <= 255
|
---|
| 4390 | && pLCHSGeometry->cSectors <= 63,
|
---|
| 4391 | ("pLCHSGeometry=%#p LCHS=%u/%u/%u\n", pLCHSGeometry,
|
---|
| 4392 | pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads,
|
---|
| 4393 | pLCHSGeometry->cSectors),
|
---|
| 4394 | rc = VERR_INVALID_PARAMETER);
|
---|
[11353] | 4395 | /* The UUID may be NULL. */
|
---|
| 4396 | AssertMsgBreakStmt(pUuid == NULL || VALID_PTR(pUuid),
|
---|
| 4397 | ("pUuid=%#p UUID=%RTuuid\n", pUuid, pUuid),
|
---|
| 4398 | rc = VERR_INVALID_PARAMETER);
|
---|
[8565] | 4399 | AssertMsgBreakStmt((uOpenFlags & ~VD_OPEN_FLAGS_MASK) == 0,
|
---|
| 4400 | ("uOpenFlags=%#x\n", uOpenFlags),
|
---|
| 4401 | rc = VERR_INVALID_PARAMETER);
|
---|
[2564] | 4402 |
|
---|
[27232] | 4403 | /* Check state. Needs a temporary read lock. Holding the write lock
|
---|
| 4404 | * all the time would be blocking other activities for too long. */
|
---|
| 4405 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 4406 | AssertRC(rc2);
|
---|
| 4407 | fLockRead = true;
|
---|
[8565] | 4408 | AssertMsgBreakStmt(pDisk->cImages == 0,
|
---|
| 4409 | ("Create base image cannot be done with other images open\n"),
|
---|
[15366] | 4410 | rc = VERR_VD_INVALID_STATE);
|
---|
[27232] | 4411 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 4412 | AssertRC(rc2);
|
---|
| 4413 | fLockRead = false;
|
---|
[2564] | 4414 |
|
---|
[6291] | 4415 | /* Set up image descriptor. */
|
---|
| 4416 | pImage = (PVDIMAGE)RTMemAllocZ(sizeof(VDIMAGE));
|
---|
| 4417 | if (!pImage)
|
---|
| 4418 | {
|
---|
| 4419 | rc = VERR_NO_MEMORY;
|
---|
| 4420 | break;
|
---|
| 4421 | }
|
---|
| 4422 | pImage->pszFilename = RTStrDup(pszFilename);
|
---|
| 4423 | if (!pImage->pszFilename)
|
---|
| 4424 | {
|
---|
| 4425 | rc = VERR_NO_MEMORY;
|
---|
| 4426 | break;
|
---|
| 4427 | }
|
---|
[28620] | 4428 | pImage->pDisk = pDisk;
|
---|
[11444] | 4429 | pImage->pVDIfsImage = pVDIfsImage;
|
---|
[6291] | 4430 |
|
---|
[32691] | 4431 | /* Set up the I/O interface. */
|
---|
| 4432 | pImage->pInterfaceIO = VDInterfaceGet(pVDIfsImage, VDINTERFACETYPE_IO);
|
---|
| 4433 | if (pImage->pInterfaceIO)
|
---|
| 4434 | pImage->pInterfaceIOCallbacks = VDGetInterfaceIO(pImage->pInterfaceIO);
|
---|
| 4435 | else
|
---|
| 4436 | {
|
---|
| 4437 | rc = VDInterfaceAdd(&pImage->VDIIO, "VD_IO", VDINTERFACETYPE_IO,
|
---|
| 4438 | &pDisk->VDIIOCallbacks, pDisk, &pVDIfsImage);
|
---|
| 4439 | pImage->pInterfaceIO = &pImage->VDIIO;
|
---|
| 4440 | pImage->pInterfaceIOCallbacks = &pDisk->VDIIOCallbacks;
|
---|
| 4441 | }
|
---|
| 4442 |
|
---|
| 4443 | /* Set up the internal I/O interface. */
|
---|
| 4444 | AssertBreakStmt(!VDInterfaceGet(pVDIfsImage, VDINTERFACETYPE_IOINT),
|
---|
| 4445 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4446 | rc = VDInterfaceAdd(&pImage->VDIIOInt, "VD_IOINT", VDINTERFACETYPE_IOINT,
|
---|
| 4447 | &pDisk->VDIIOIntCallbacks, pImage, &pImage->pVDIfsImage);
|
---|
[32553] | 4448 | AssertRC(rc);
|
---|
[28620] | 4449 |
|
---|
[14852] | 4450 | rc = vdFindBackend(pszBackend, &pImage->Backend);
|
---|
[11266] | 4451 | if (RT_FAILURE(rc))
|
---|
[7277] | 4452 | break;
|
---|
| 4453 | if (!pImage->Backend)
|
---|
| 4454 | {
|
---|
| 4455 | rc = vdError(pDisk, VERR_INVALID_PARAMETER, RT_SRC_POS,
|
---|
| 4456 | N_("VD: unknown backend name '%s'"), pszBackend);
|
---|
| 4457 | break;
|
---|
| 4458 | }
|
---|
[2564] | 4459 |
|
---|
[11353] | 4460 | /* Create UUID if the caller didn't specify one. */
|
---|
| 4461 | if (!pUuid)
|
---|
| 4462 | {
|
---|
| 4463 | rc = RTUuidCreate(&uuid);
|
---|
| 4464 | if (RT_FAILURE(rc))
|
---|
| 4465 | {
|
---|
| 4466 | rc = vdError(pDisk, rc, RT_SRC_POS,
|
---|
| 4467 | N_("VD: cannot generate UUID for image '%s'"),
|
---|
| 4468 | pszFilename);
|
---|
| 4469 | break;
|
---|
| 4470 | }
|
---|
| 4471 | pUuid = &uuid;
|
---|
| 4472 | }
|
---|
| 4473 |
|
---|
[7900] | 4474 | pImage->uOpenFlags = uOpenFlags & VD_OPEN_FLAGS_HONOR_SAME;
|
---|
[17970] | 4475 | uImageFlags &= ~VD_IMAGE_FLAGS_DIFF;
|
---|
| 4476 | rc = pImage->Backend->pfnCreate(pImage->pszFilename, cbSize,
|
---|
[7277] | 4477 | uImageFlags, pszComment, pPCHSGeometry,
|
---|
[11353] | 4478 | pLCHSGeometry, pUuid,
|
---|
[7900] | 4479 | uOpenFlags & ~VD_OPEN_FLAGS_HONOR_SAME,
|
---|
[11444] | 4480 | 0, 99,
|
---|
| 4481 | pDisk->pVDIfsDisk,
|
---|
| 4482 | pImage->pVDIfsImage,
|
---|
| 4483 | pVDIfsOperation,
|
---|
[32536] | 4484 | &pImage->pBackendData);
|
---|
[7277] | 4485 |
|
---|
[11266] | 4486 | if (RT_SUCCESS(rc))
|
---|
[2650] | 4487 | {
|
---|
[17970] | 4488 | pImage->uImageFlags = uImageFlags;
|
---|
[9560] | 4489 |
|
---|
[7900] | 4490 | /* Force sane optimization settings. It's not worth avoiding writes
|
---|
| 4491 | * to fixed size images. The overhead would have almost no payback. */
|
---|
[17970] | 4492 | if (uImageFlags & VD_IMAGE_FLAGS_FIXED)
|
---|
[7900] | 4493 | pImage->uOpenFlags |= VD_OPEN_FLAGS_HONOR_SAME;
|
---|
| 4494 |
|
---|
[27232] | 4495 | /* Lock disk for writing, as we modify pDisk information below. */
|
---|
| 4496 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 4497 | AssertRC(rc2);
|
---|
| 4498 | fLockWrite = true;
|
---|
| 4499 |
|
---|
[6291] | 4500 | /** @todo optionally check UUIDs */
|
---|
[2650] | 4501 |
|
---|
[27232] | 4502 | /* Re-check state, as the lock wasn't held and another image
|
---|
| 4503 | * creation call could have been done by another thread. */
|
---|
| 4504 | AssertMsgStmt(pDisk->cImages == 0,
|
---|
| 4505 | ("Create base image cannot be done with other images open\n"),
|
---|
| 4506 | rc = VERR_VD_INVALID_STATE);
|
---|
| 4507 | }
|
---|
[2650] | 4508 |
|
---|
[27232] | 4509 | if (RT_SUCCESS(rc))
|
---|
| 4510 | {
|
---|
[6291] | 4511 | /* Cache disk information. */
|
---|
[32536] | 4512 | pDisk->cbSize = pImage->Backend->pfnGetSize(pImage->pBackendData);
|
---|
[6291] | 4513 |
|
---|
| 4514 | /* Cache PCHS geometry. */
|
---|
[32536] | 4515 | rc2 = pImage->Backend->pfnGetPCHSGeometry(pImage->pBackendData,
|
---|
[7277] | 4516 | &pDisk->PCHSGeometry);
|
---|
[11266] | 4517 | if (RT_FAILURE(rc2))
|
---|
[6291] | 4518 | {
|
---|
| 4519 | pDisk->PCHSGeometry.cCylinders = 0;
|
---|
| 4520 | pDisk->PCHSGeometry.cHeads = 0;
|
---|
| 4521 | pDisk->PCHSGeometry.cSectors = 0;
|
---|
[2650] | 4522 | }
|
---|
| 4523 | else
|
---|
| 4524 | {
|
---|
[6291] | 4525 | /* Make sure the CHS geometry is properly clipped. */
|
---|
| 4526 | pDisk->PCHSGeometry.cCylinders = RT_MIN(pDisk->PCHSGeometry.cCylinders, 16383);
|
---|
| 4527 | pDisk->PCHSGeometry.cHeads = RT_MIN(pDisk->PCHSGeometry.cHeads, 16);
|
---|
| 4528 | pDisk->PCHSGeometry.cSectors = RT_MIN(pDisk->PCHSGeometry.cSectors, 63);
|
---|
[2650] | 4529 | }
|
---|
[6291] | 4530 |
|
---|
| 4531 | /* Cache LCHS geometry. */
|
---|
[32536] | 4532 | rc2 = pImage->Backend->pfnGetLCHSGeometry(pImage->pBackendData,
|
---|
[7277] | 4533 | &pDisk->LCHSGeometry);
|
---|
[11266] | 4534 | if (RT_FAILURE(rc2))
|
---|
[6291] | 4535 | {
|
---|
| 4536 | pDisk->LCHSGeometry.cCylinders = 0;
|
---|
| 4537 | pDisk->LCHSGeometry.cHeads = 0;
|
---|
| 4538 | pDisk->LCHSGeometry.cSectors = 0;
|
---|
| 4539 | }
|
---|
| 4540 | else
|
---|
| 4541 | {
|
---|
| 4542 | /* Make sure the CHS geometry is properly clipped. */
|
---|
| 4543 | pDisk->LCHSGeometry.cHeads = RT_MIN(pDisk->LCHSGeometry.cHeads, 255);
|
---|
| 4544 | pDisk->LCHSGeometry.cSectors = RT_MIN(pDisk->LCHSGeometry.cSectors, 63);
|
---|
| 4545 | }
|
---|
[2650] | 4546 |
|
---|
| 4547 | /* Image successfully opened, make it the last image. */
|
---|
| 4548 | vdAddImageToList(pDisk, pImage);
|
---|
[7900] | 4549 | if (!(uOpenFlags & VD_OPEN_FLAGS_READONLY))
|
---|
| 4550 | pDisk->uModified = VD_IMAGE_MODIFIED_FIRST;
|
---|
[2650] | 4551 | }
|
---|
| 4552 | else
|
---|
| 4553 | {
|
---|
[32641] | 4554 | /* Error detected, image may or may not be opened. Close and delete
|
---|
| 4555 | * image if it was opened. */
|
---|
| 4556 | if (pImage->pBackendData)
|
---|
| 4557 | {
|
---|
| 4558 | rc2 = pImage->Backend->pfnClose(pImage->pBackendData, true);
|
---|
| 4559 | AssertRC(rc2);
|
---|
| 4560 | pImage->pBackendData = NULL;
|
---|
| 4561 | }
|
---|
[2650] | 4562 | }
|
---|
[6291] | 4563 | } while (0);
|
---|
[2650] | 4564 |
|
---|
[27232] | 4565 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 4566 | {
|
---|
| 4567 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 4568 | AssertRC(rc2);
|
---|
| 4569 | }
|
---|
| 4570 | else if (RT_UNLIKELY(fLockRead))
|
---|
| 4571 | {
|
---|
| 4572 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 4573 | AssertRC(rc2);
|
---|
| 4574 | }
|
---|
| 4575 |
|
---|
[11266] | 4576 | if (RT_FAILURE(rc))
|
---|
[2564] | 4577 | {
|
---|
[2650] | 4578 | if (pImage)
|
---|
| 4579 | {
|
---|
| 4580 | if (pImage->pszFilename)
|
---|
| 4581 | RTStrFree(pImage->pszFilename);
|
---|
| 4582 | RTMemFree(pImage);
|
---|
| 4583 | }
|
---|
[2564] | 4584 | }
|
---|
| 4585 |
|
---|
[12143] | 4586 | if (RT_SUCCESS(rc) && pCbProgress && pCbProgress->pfnProgress)
|
---|
[27245] | 4587 | pCbProgress->pfnProgress(pIfProgress->pvUser, 100);
|
---|
[6291] | 4588 |
|
---|
[11284] | 4589 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[2564] | 4590 | return rc;
|
---|
[2379] | 4591 | }
|
---|
| 4592 |
|
---|
| 4593 | /**
|
---|
| 4594 | * Creates and opens a new differencing image file in HDD container.
|
---|
| 4595 | * See comments for VDOpen function about differencing images.
|
---|
| 4596 | *
|
---|
| 4597 | * @returns VBox status code.
|
---|
[6291] | 4598 | * @param pDisk Pointer to HDD container.
|
---|
[7277] | 4599 | * @param pszBackend Name of the image file backend to use.
|
---|
[2379] | 4600 | * @param pszFilename Name of the differencing image file to create.
|
---|
| 4601 | * @param uImageFlags Flags specifying special image features.
|
---|
| 4602 | * @param pszComment Pointer to image comment. NULL is ok.
|
---|
[11353] | 4603 | * @param pUuid New UUID of the image. If NULL, a new UUID is created.
|
---|
[15591] | 4604 | * @param pParentUuid New parent UUID of the image. If NULL, the UUID is queried automatically.
|
---|
[2379] | 4605 | * @param uOpenFlags Image file open mode, see VD_OPEN_FLAGS_* constants.
|
---|
[11444] | 4606 | * @param pVDIfsImage Pointer to the per-image VD interface list.
|
---|
| 4607 | * @param pVDIfsOperation Pointer to the per-operation VD interface list.
|
---|
[2379] | 4608 | */
|
---|
[7277] | 4609 | VBOXDDU_DECL(int) VDCreateDiff(PVBOXHDD pDisk, const char *pszBackend,
|
---|
| 4610 | const char *pszFilename, unsigned uImageFlags,
|
---|
[11353] | 4611 | const char *pszComment, PCRTUUID pUuid,
|
---|
[15591] | 4612 | PCRTUUID pParentUuid, unsigned uOpenFlags,
|
---|
| 4613 | PVDINTERFACE pVDIfsImage,
|
---|
[11444] | 4614 | PVDINTERFACE pVDIfsOperation)
|
---|
[2379] | 4615 | {
|
---|
[6291] | 4616 | int rc = VINF_SUCCESS;
|
---|
[27232] | 4617 | int rc2;
|
---|
| 4618 | bool fLockWrite = false, fLockRead = false;
|
---|
[6291] | 4619 | PVDIMAGE pImage = NULL;
|
---|
[11353] | 4620 | RTUUID uuid;
|
---|
[6291] | 4621 |
|
---|
[32370] | 4622 | LogFlowFunc(("pDisk=%#p pszBackend=\"%s\" pszFilename=\"%s\" uImageFlags=%#x pszComment=\"%s\" Uuid=%RTuuid uOpenFlags=%#x pVDIfsImage=%#p pVDIfsOperation=%#p\n",
|
---|
| 4623 | pDisk, pszBackend, pszFilename, uImageFlags, pszComment, pUuid, uOpenFlags, pVDIfsImage, pVDIfsOperation));
|
---|
[11444] | 4624 |
|
---|
| 4625 | PVDINTERFACE pIfProgress = VDInterfaceGet(pVDIfsOperation,
|
---|
| 4626 | VDINTERFACETYPE_PROGRESS);
|
---|
| 4627 | PVDINTERFACEPROGRESS pCbProgress = NULL;
|
---|
| 4628 | if (pIfProgress)
|
---|
| 4629 | pCbProgress = VDGetInterfaceProgress(pIfProgress);
|
---|
| 4630 |
|
---|
[6291] | 4631 | do
|
---|
| 4632 | {
|
---|
| 4633 | /* sanity check */
|
---|
[8569] | 4634 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 4635 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 4636 |
|
---|
| 4637 | /* Check arguments. */
|
---|
[8565] | 4638 | AssertMsgBreakStmt(VALID_PTR(pszBackend) && *pszBackend,
|
---|
| 4639 | ("pszBackend=%#p \"%s\"\n", pszBackend, pszBackend),
|
---|
| 4640 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4641 | AssertMsgBreakStmt(VALID_PTR(pszFilename) && *pszFilename,
|
---|
| 4642 | ("pszFilename=%#p \"%s\"\n", pszFilename, pszFilename),
|
---|
| 4643 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4644 | AssertMsgBreakStmt((uImageFlags & ~VD_IMAGE_FLAGS_MASK) == 0,
|
---|
| 4645 | ("uImageFlags=%#x\n", uImageFlags),
|
---|
| 4646 | rc = VERR_INVALID_PARAMETER);
|
---|
[11353] | 4647 | /* The UUID may be NULL. */
|
---|
| 4648 | AssertMsgBreakStmt(pUuid == NULL || VALID_PTR(pUuid),
|
---|
| 4649 | ("pUuid=%#p UUID=%RTuuid\n", pUuid, pUuid),
|
---|
| 4650 | rc = VERR_INVALID_PARAMETER);
|
---|
[15591] | 4651 | /* The parent UUID may be NULL. */
|
---|
| 4652 | AssertMsgBreakStmt(pParentUuid == NULL || VALID_PTR(pParentUuid),
|
---|
| 4653 | ("pParentUuid=%#p ParentUUID=%RTuuid\n", pParentUuid, pParentUuid),
|
---|
| 4654 | rc = VERR_INVALID_PARAMETER);
|
---|
[8565] | 4655 | AssertMsgBreakStmt((uOpenFlags & ~VD_OPEN_FLAGS_MASK) == 0,
|
---|
| 4656 | ("uOpenFlags=%#x\n", uOpenFlags),
|
---|
| 4657 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 4658 |
|
---|
[27232] | 4659 | /* Check state. Needs a temporary read lock. Holding the write lock
|
---|
| 4660 | * all the time would be blocking other activities for too long. */
|
---|
| 4661 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 4662 | AssertRC(rc2);
|
---|
| 4663 | fLockRead = true;
|
---|
[8565] | 4664 | AssertMsgBreakStmt(pDisk->cImages != 0,
|
---|
| 4665 | ("Create diff image cannot be done without other images open\n"),
|
---|
[15366] | 4666 | rc = VERR_VD_INVALID_STATE);
|
---|
[27232] | 4667 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 4668 | AssertRC(rc2);
|
---|
| 4669 | fLockRead = false;
|
---|
[6291] | 4670 |
|
---|
| 4671 | /* Set up image descriptor. */
|
---|
| 4672 | pImage = (PVDIMAGE)RTMemAllocZ(sizeof(VDIMAGE));
|
---|
| 4673 | if (!pImage)
|
---|
| 4674 | {
|
---|
| 4675 | rc = VERR_NO_MEMORY;
|
---|
| 4676 | break;
|
---|
| 4677 | }
|
---|
| 4678 | pImage->pszFilename = RTStrDup(pszFilename);
|
---|
| 4679 | if (!pImage->pszFilename)
|
---|
| 4680 | {
|
---|
| 4681 | rc = VERR_NO_MEMORY;
|
---|
| 4682 | break;
|
---|
| 4683 | }
|
---|
| 4684 |
|
---|
[14852] | 4685 | rc = vdFindBackend(pszBackend, &pImage->Backend);
|
---|
[11266] | 4686 | if (RT_FAILURE(rc))
|
---|
[7277] | 4687 | break;
|
---|
| 4688 | if (!pImage->Backend)
|
---|
| 4689 | {
|
---|
| 4690 | rc = vdError(pDisk, VERR_INVALID_PARAMETER, RT_SRC_POS,
|
---|
| 4691 | N_("VD: unknown backend name '%s'"), pszBackend);
|
---|
| 4692 | break;
|
---|
| 4693 | }
|
---|
[6291] | 4694 |
|
---|
[28620] | 4695 | pImage->pDisk = pDisk;
|
---|
| 4696 | pImage->pVDIfsImage = pVDIfsImage;
|
---|
| 4697 |
|
---|
[32691] | 4698 | /* Set up the I/O interface. */
|
---|
| 4699 | pImage->pInterfaceIO = VDInterfaceGet(pVDIfsImage, VDINTERFACETYPE_IO);
|
---|
| 4700 | if (pImage->pInterfaceIO)
|
---|
| 4701 | pImage->pInterfaceIOCallbacks = VDGetInterfaceIO(pImage->pInterfaceIO);
|
---|
| 4702 | else
|
---|
| 4703 | {
|
---|
| 4704 | rc = VDInterfaceAdd(&pImage->VDIIO, "VD_IO", VDINTERFACETYPE_IO,
|
---|
| 4705 | &pDisk->VDIIOCallbacks, pDisk, &pVDIfsImage);
|
---|
| 4706 | pImage->pInterfaceIO = &pImage->VDIIO;
|
---|
| 4707 | pImage->pInterfaceIOCallbacks = &pDisk->VDIIOCallbacks;
|
---|
| 4708 | }
|
---|
| 4709 |
|
---|
| 4710 | /* Set up the internal I/O interface. */
|
---|
| 4711 | AssertBreakStmt(!VDInterfaceGet(pVDIfsImage, VDINTERFACETYPE_IOINT),
|
---|
| 4712 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4713 | rc = VDInterfaceAdd(&pImage->VDIIOInt, "VD_IOINT", VDINTERFACETYPE_IOINT,
|
---|
| 4714 | &pDisk->VDIIOIntCallbacks, pImage, &pImage->pVDIfsImage);
|
---|
[32553] | 4715 | AssertRC(rc);
|
---|
[28620] | 4716 |
|
---|
[11353] | 4717 | /* Create UUID if the caller didn't specify one. */
|
---|
| 4718 | if (!pUuid)
|
---|
| 4719 | {
|
---|
| 4720 | rc = RTUuidCreate(&uuid);
|
---|
| 4721 | if (RT_FAILURE(rc))
|
---|
| 4722 | {
|
---|
| 4723 | rc = vdError(pDisk, rc, RT_SRC_POS,
|
---|
| 4724 | N_("VD: cannot generate UUID for image '%s'"),
|
---|
| 4725 | pszFilename);
|
---|
| 4726 | break;
|
---|
| 4727 | }
|
---|
| 4728 | pUuid = &uuid;
|
---|
| 4729 | }
|
---|
| 4730 |
|
---|
[7900] | 4731 | pImage->uOpenFlags = uOpenFlags & VD_OPEN_FLAGS_HONOR_SAME;
|
---|
[21806] | 4732 | uImageFlags |= VD_IMAGE_FLAGS_DIFF;
|
---|
[17970] | 4733 | rc = pImage->Backend->pfnCreate(pImage->pszFilename, pDisk->cbSize,
|
---|
[21806] | 4734 | uImageFlags | VD_IMAGE_FLAGS_DIFF,
|
---|
| 4735 | pszComment, &pDisk->PCHSGeometry,
|
---|
[11353] | 4736 | &pDisk->LCHSGeometry, pUuid,
|
---|
[7900] | 4737 | uOpenFlags & ~VD_OPEN_FLAGS_HONOR_SAME,
|
---|
[11444] | 4738 | 0, 99,
|
---|
| 4739 | pDisk->pVDIfsDisk,
|
---|
| 4740 | pImage->pVDIfsImage,
|
---|
| 4741 | pVDIfsOperation,
|
---|
[32536] | 4742 | &pImage->pBackendData);
|
---|
[7277] | 4743 |
|
---|
[27232] | 4744 | if (RT_SUCCESS(rc))
|
---|
[7900] | 4745 | {
|
---|
[21806] | 4746 | pImage->uImageFlags = uImageFlags;
|
---|
[9560] | 4747 |
|
---|
[27232] | 4748 | /* Lock disk for writing, as we modify pDisk information below. */
|
---|
| 4749 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 4750 | AssertRC(rc2);
|
---|
| 4751 | fLockWrite = true;
|
---|
| 4752 |
|
---|
[7900] | 4753 | /* Switch previous image to read-only mode. */
|
---|
| 4754 | unsigned uOpenFlagsPrevImg;
|
---|
[32536] | 4755 | uOpenFlagsPrevImg = pDisk->pLast->Backend->pfnGetOpenFlags(pDisk->pLast->pBackendData);
|
---|
[7900] | 4756 | if (!(uOpenFlagsPrevImg & VD_OPEN_FLAGS_READONLY))
|
---|
| 4757 | {
|
---|
| 4758 | uOpenFlagsPrevImg |= VD_OPEN_FLAGS_READONLY;
|
---|
[32536] | 4759 | rc = pDisk->pLast->Backend->pfnSetOpenFlags(pDisk->pLast->pBackendData, uOpenFlagsPrevImg);
|
---|
[7900] | 4760 | }
|
---|
[27232] | 4761 |
|
---|
| 4762 | /** @todo optionally check UUIDs */
|
---|
| 4763 |
|
---|
| 4764 | /* Re-check state, as the lock wasn't held and another image
|
---|
| 4765 | * creation call could have been done by another thread. */
|
---|
| 4766 | AssertMsgStmt(pDisk->cImages != 0,
|
---|
| 4767 | ("Create diff image cannot be done without other images open\n"),
|
---|
| 4768 | rc = VERR_VD_INVALID_STATE);
|
---|
[7900] | 4769 | }
|
---|
| 4770 |
|
---|
[11266] | 4771 | if (RT_SUCCESS(rc))
|
---|
[6291] | 4772 | {
|
---|
[7900] | 4773 | RTUUID Uuid;
|
---|
[9734] | 4774 | RTTIMESPEC ts;
|
---|
[7900] | 4775 |
|
---|
[15591] | 4776 | if (pParentUuid && !RTUuidIsNull(pParentUuid))
|
---|
| 4777 | {
|
---|
| 4778 | Uuid = *pParentUuid;
|
---|
[32536] | 4779 | pImage->Backend->pfnSetParentUuid(pImage->pBackendData, &Uuid);
|
---|
[15591] | 4780 | }
|
---|
| 4781 | else
|
---|
| 4782 | {
|
---|
[32536] | 4783 | rc2 = pDisk->pLast->Backend->pfnGetUuid(pDisk->pLast->pBackendData,
|
---|
[15591] | 4784 | &Uuid);
|
---|
| 4785 | if (RT_SUCCESS(rc2))
|
---|
[32536] | 4786 | pImage->Backend->pfnSetParentUuid(pImage->pBackendData, &Uuid);
|
---|
[15591] | 4787 | }
|
---|
[32536] | 4788 | rc2 = pDisk->pLast->Backend->pfnGetModificationUuid(pDisk->pLast->pBackendData,
|
---|
[7900] | 4789 | &Uuid);
|
---|
[11266] | 4790 | if (RT_SUCCESS(rc2))
|
---|
[32536] | 4791 | pImage->Backend->pfnSetParentModificationUuid(pImage->pBackendData,
|
---|
[7900] | 4792 | &Uuid);
|
---|
[32536] | 4793 | if (pDisk->pLast->Backend->pfnGetTimeStamp)
|
---|
| 4794 | rc2 = pDisk->pLast->Backend->pfnGetTimeStamp(pDisk->pLast->pBackendData,
|
---|
| 4795 | &ts);
|
---|
| 4796 | else
|
---|
[32600] | 4797 | rc2 = VERR_NOT_IMPLEMENTED;
|
---|
[32536] | 4798 | if (RT_SUCCESS(rc2) && pImage->Backend->pfnSetParentTimeStamp)
|
---|
| 4799 | pImage->Backend->pfnSetParentTimeStamp(pImage->pBackendData, &ts);
|
---|
[9734] | 4800 |
|
---|
[32536] | 4801 | if (pImage->Backend->pfnSetParentFilename)
|
---|
| 4802 | rc2 = pImage->Backend->pfnSetParentFilename(pImage->pBackendData, pDisk->pLast->pszFilename);
|
---|
[7900] | 4803 | }
|
---|
| 4804 |
|
---|
[11266] | 4805 | if (RT_SUCCESS(rc))
|
---|
[7900] | 4806 | {
|
---|
[6291] | 4807 | /* Image successfully opened, make it the last image. */
|
---|
| 4808 | vdAddImageToList(pDisk, pImage);
|
---|
[7900] | 4809 | if (!(uOpenFlags & VD_OPEN_FLAGS_READONLY))
|
---|
| 4810 | pDisk->uModified = VD_IMAGE_MODIFIED_FIRST;
|
---|
[6291] | 4811 | }
|
---|
| 4812 | else
|
---|
| 4813 | {
|
---|
| 4814 | /* Error detected, but image opened. Close and delete image. */
|
---|
[32536] | 4815 | rc2 = pImage->Backend->pfnClose(pImage->pBackendData, true);
|
---|
[6291] | 4816 | AssertRC(rc2);
|
---|
[32536] | 4817 | pImage->pBackendData = NULL;
|
---|
[6291] | 4818 | }
|
---|
| 4819 | } while (0);
|
---|
| 4820 |
|
---|
[27232] | 4821 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 4822 | {
|
---|
| 4823 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 4824 | AssertRC(rc2);
|
---|
| 4825 | }
|
---|
| 4826 | else if (RT_UNLIKELY(fLockRead))
|
---|
| 4827 | {
|
---|
| 4828 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 4829 | AssertRC(rc2);
|
---|
| 4830 | }
|
---|
| 4831 |
|
---|
[11266] | 4832 | if (RT_FAILURE(rc))
|
---|
[6291] | 4833 | {
|
---|
| 4834 | if (pImage)
|
---|
| 4835 | {
|
---|
| 4836 | if (pImage->pszFilename)
|
---|
| 4837 | RTStrFree(pImage->pszFilename);
|
---|
| 4838 | RTMemFree(pImage);
|
---|
| 4839 | }
|
---|
| 4840 | }
|
---|
| 4841 |
|
---|
[12143] | 4842 | if (RT_SUCCESS(rc) && pCbProgress && pCbProgress->pfnProgress)
|
---|
[27245] | 4843 | pCbProgress->pfnProgress(pIfProgress->pvUser, 100);
|
---|
[6291] | 4844 |
|
---|
[11284] | 4845 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[6291] | 4846 | return rc;
|
---|
[2379] | 4847 | }
|
---|
| 4848 |
|
---|
[27211] | 4849 |
|
---|
[2379] | 4850 | /**
|
---|
[32370] | 4851 | * Creates and opens new cache image file in HDD container.
|
---|
| 4852 | *
|
---|
| 4853 | * @return VBox status code.
|
---|
| 4854 | * @param pDisk Name of the cache file backend to use (case insensitive).
|
---|
| 4855 | * @param pszFilename Name of the differencing cache file to create.
|
---|
| 4856 | * @param cbSize Maximum size of the cache.
|
---|
| 4857 | * @param uImageFlags Flags specifying special cache features.
|
---|
| 4858 | * @param pszComment Pointer to image comment. NULL is ok.
|
---|
| 4859 | * @param pUuid New UUID of the image. If NULL, a new UUID is created.
|
---|
| 4860 | * @param uOpenFlags Image file open mode, see VD_OPEN_FLAGS_* constants.
|
---|
| 4861 | * @param pVDIfsCache Pointer to the per-cache VD interface list.
|
---|
| 4862 | * @param pVDIfsOperation Pointer to the per-operation VD interface list.
|
---|
| 4863 | */
|
---|
| 4864 | VBOXDDU_DECL(int) VDCreateCache(PVBOXHDD pDisk, const char *pszBackend,
|
---|
| 4865 | const char *pszFilename, uint64_t cbSize,
|
---|
| 4866 | unsigned uImageFlags, const char *pszComment,
|
---|
| 4867 | PCRTUUID pUuid, unsigned uOpenFlags,
|
---|
| 4868 | PVDINTERFACE pVDIfsCache, PVDINTERFACE pVDIfsOperation)
|
---|
| 4869 | {
|
---|
| 4870 | int rc = VINF_SUCCESS;
|
---|
| 4871 | int rc2;
|
---|
| 4872 | bool fLockWrite = false, fLockRead = false;
|
---|
| 4873 | PVDCACHE pCache = NULL;
|
---|
| 4874 | RTUUID uuid;
|
---|
| 4875 |
|
---|
| 4876 | LogFlowFunc(("pDisk=%#p pszBackend=\"%s\" pszFilename=\"%s\" cbSIze=%llu uImageFlags=%#x pszComment=\"%s\" Uuid=%RTuuid uOpenFlags=%#x pVDIfsImage=%#p pVDIfsOperation=%#p\n",
|
---|
| 4877 | pDisk, pszBackend, pszFilename, cbSize, uImageFlags, pszComment, pUuid, uOpenFlags, pVDIfsCache, pVDIfsOperation));
|
---|
| 4878 |
|
---|
| 4879 | PVDINTERFACE pIfProgress = VDInterfaceGet(pVDIfsOperation,
|
---|
| 4880 | VDINTERFACETYPE_PROGRESS);
|
---|
| 4881 | PVDINTERFACEPROGRESS pCbProgress = NULL;
|
---|
| 4882 | if (pIfProgress)
|
---|
| 4883 | pCbProgress = VDGetInterfaceProgress(pIfProgress);
|
---|
| 4884 |
|
---|
| 4885 | do
|
---|
| 4886 | {
|
---|
| 4887 | /* sanity check */
|
---|
| 4888 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
| 4889 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 4890 |
|
---|
| 4891 | /* Check arguments. */
|
---|
| 4892 | AssertMsgBreakStmt(VALID_PTR(pszBackend) && *pszBackend,
|
---|
| 4893 | ("pszBackend=%#p \"%s\"\n", pszBackend, pszBackend),
|
---|
| 4894 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4895 | AssertMsgBreakStmt(VALID_PTR(pszFilename) && *pszFilename,
|
---|
| 4896 | ("pszFilename=%#p \"%s\"\n", pszFilename, pszFilename),
|
---|
| 4897 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4898 | AssertMsgBreakStmt(cbSize,
|
---|
| 4899 | ("cbSize=%llu\n", cbSize),
|
---|
| 4900 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4901 | AssertMsgBreakStmt((uImageFlags & ~VD_IMAGE_FLAGS_MASK) == 0,
|
---|
| 4902 | ("uImageFlags=%#x\n", uImageFlags),
|
---|
| 4903 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4904 | /* The UUID may be NULL. */
|
---|
| 4905 | AssertMsgBreakStmt(pUuid == NULL || VALID_PTR(pUuid),
|
---|
| 4906 | ("pUuid=%#p UUID=%RTuuid\n", pUuid, pUuid),
|
---|
| 4907 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4908 | AssertMsgBreakStmt((uOpenFlags & ~VD_OPEN_FLAGS_MASK) == 0,
|
---|
| 4909 | ("uOpenFlags=%#x\n", uOpenFlags),
|
---|
| 4910 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4911 |
|
---|
| 4912 | /* Check state. Needs a temporary read lock. Holding the write lock
|
---|
| 4913 | * all the time would be blocking other activities for too long. */
|
---|
| 4914 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 4915 | AssertRC(rc2);
|
---|
| 4916 | fLockRead = true;
|
---|
| 4917 | AssertMsgBreakStmt(pDisk->cImages != 0,
|
---|
| 4918 | ("Create diff image cannot be done without other images open\n"),
|
---|
| 4919 | rc = VERR_VD_INVALID_STATE);
|
---|
| 4920 | AssertMsgBreakStmt(!pDisk->pCache,
|
---|
| 4921 | ("Create cache image cannot be done with a cache already attached\n"),
|
---|
| 4922 | rc = VERR_VD_CACHE_ALREADY_EXISTS);
|
---|
| 4923 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 4924 | AssertRC(rc2);
|
---|
| 4925 | fLockRead = false;
|
---|
| 4926 |
|
---|
| 4927 | /* Set up image descriptor. */
|
---|
| 4928 | pCache = (PVDCACHE)RTMemAllocZ(sizeof(VDCACHE));
|
---|
| 4929 | if (!pCache)
|
---|
| 4930 | {
|
---|
| 4931 | rc = VERR_NO_MEMORY;
|
---|
| 4932 | break;
|
---|
| 4933 | }
|
---|
| 4934 | pCache->pszFilename = RTStrDup(pszFilename);
|
---|
| 4935 | if (!pCache->pszFilename)
|
---|
| 4936 | {
|
---|
| 4937 | rc = VERR_NO_MEMORY;
|
---|
| 4938 | break;
|
---|
| 4939 | }
|
---|
| 4940 |
|
---|
| 4941 | rc = vdFindCacheBackend(pszBackend, &pCache->Backend);
|
---|
| 4942 | if (RT_FAILURE(rc))
|
---|
| 4943 | break;
|
---|
| 4944 | if (!pCache->Backend)
|
---|
| 4945 | {
|
---|
| 4946 | rc = vdError(pDisk, VERR_INVALID_PARAMETER, RT_SRC_POS,
|
---|
| 4947 | N_("VD: unknown backend name '%s'"), pszBackend);
|
---|
| 4948 | break;
|
---|
| 4949 | }
|
---|
| 4950 |
|
---|
| 4951 | pCache->pDisk = pDisk;
|
---|
| 4952 | pCache->pVDIfsCache = pVDIfsCache;
|
---|
| 4953 |
|
---|
| 4954 | /* Set up the I/O interface. */
|
---|
[32691] | 4955 | pCache->pInterfaceIO = VDInterfaceGet(pVDIfsCache, VDINTERFACETYPE_IO);
|
---|
| 4956 | if (pCache->pInterfaceIO)
|
---|
| 4957 | pCache->pInterfaceIOCallbacks = VDGetInterfaceIO(pCache->pInterfaceIO);
|
---|
| 4958 | else
|
---|
| 4959 | {
|
---|
| 4960 | rc = VDInterfaceAdd(&pCache->VDIIO, "VD_IO", VDINTERFACETYPE_IO,
|
---|
| 4961 | &pDisk->VDIIOCallbacks, pDisk, &pVDIfsCache);
|
---|
| 4962 | pCache->pInterfaceIO = &pCache->VDIIO;
|
---|
| 4963 | pCache->pInterfaceIOCallbacks = &pDisk->VDIIOCallbacks;
|
---|
| 4964 | }
|
---|
| 4965 |
|
---|
| 4966 | /* Set up the internal I/O interface. */
|
---|
| 4967 | AssertBreakStmt(!VDInterfaceGet(pVDIfsCache, VDINTERFACETYPE_IOINT),
|
---|
| 4968 | rc = VERR_INVALID_PARAMETER);
|
---|
| 4969 | rc = VDInterfaceAdd(&pCache->VDIIOInt, "VD_IOINT", VDINTERFACETYPE_IOINT,
|
---|
[32553] | 4970 | &pDisk->VDIIOIntCallbacks, pCache, &pCache->pVDIfsCache);
|
---|
[32370] | 4971 | AssertRC(rc);
|
---|
| 4972 |
|
---|
| 4973 | /* Create UUID if the caller didn't specify one. */
|
---|
| 4974 | if (!pUuid)
|
---|
| 4975 | {
|
---|
| 4976 | rc = RTUuidCreate(&uuid);
|
---|
| 4977 | if (RT_FAILURE(rc))
|
---|
| 4978 | {
|
---|
| 4979 | rc = vdError(pDisk, rc, RT_SRC_POS,
|
---|
| 4980 | N_("VD: cannot generate UUID for image '%s'"),
|
---|
| 4981 | pszFilename);
|
---|
| 4982 | break;
|
---|
| 4983 | }
|
---|
| 4984 | pUuid = &uuid;
|
---|
| 4985 | }
|
---|
| 4986 |
|
---|
| 4987 | pCache->uOpenFlags = uOpenFlags & VD_OPEN_FLAGS_HONOR_SAME;
|
---|
| 4988 | rc = pCache->Backend->pfnCreate(pCache->pszFilename, cbSize,
|
---|
| 4989 | uImageFlags,
|
---|
| 4990 | pszComment, pUuid,
|
---|
| 4991 | uOpenFlags & ~VD_OPEN_FLAGS_HONOR_SAME,
|
---|
| 4992 | 0, 99,
|
---|
| 4993 | pDisk->pVDIfsDisk,
|
---|
| 4994 | pCache->pVDIfsCache,
|
---|
| 4995 | pVDIfsOperation,
|
---|
[32536] | 4996 | &pCache->pBackendData);
|
---|
[32370] | 4997 |
|
---|
| 4998 | if (RT_SUCCESS(rc))
|
---|
| 4999 | {
|
---|
| 5000 | /* Lock disk for writing, as we modify pDisk information below. */
|
---|
| 5001 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 5002 | AssertRC(rc2);
|
---|
| 5003 | fLockWrite = true;
|
---|
| 5004 |
|
---|
| 5005 | /* Re-check state, as the lock wasn't held and another image
|
---|
| 5006 | * creation call could have been done by another thread. */
|
---|
| 5007 | AssertMsgStmt(!pDisk->pCache,
|
---|
| 5008 | ("Create cache image cannot be done with another cache open\n"),
|
---|
| 5009 | rc = VERR_VD_CACHE_ALREADY_EXISTS);
|
---|
| 5010 | }
|
---|
| 5011 |
|
---|
| 5012 | if (RT_SUCCESS(rc))
|
---|
| 5013 | {
|
---|
| 5014 | RTUUID UuidModification;
|
---|
| 5015 |
|
---|
| 5016 | /* Set same modification Uuid as the last image. */
|
---|
[32536] | 5017 | rc = pDisk->pLast->Backend->pfnGetModificationUuid(pDisk->pLast->pBackendData,
|
---|
[32370] | 5018 | &UuidModification);
|
---|
| 5019 | if (RT_SUCCESS(rc))
|
---|
| 5020 | {
|
---|
[32536] | 5021 | rc = pCache->Backend->pfnSetModificationUuid(pCache->pBackendData,
|
---|
[32370] | 5022 | &UuidModification);
|
---|
| 5023 | }
|
---|
| 5024 |
|
---|
| 5025 | if (rc == VERR_NOT_SUPPORTED)
|
---|
| 5026 | rc = VINF_SUCCESS;
|
---|
| 5027 | }
|
---|
| 5028 |
|
---|
| 5029 | if (RT_SUCCESS(rc))
|
---|
| 5030 | {
|
---|
| 5031 | /* Cache successfully created. */
|
---|
| 5032 | pDisk->pCache = pCache;
|
---|
| 5033 | }
|
---|
| 5034 | else
|
---|
| 5035 | {
|
---|
| 5036 | /* Error detected, but image opened. Close and delete image. */
|
---|
[32536] | 5037 | rc2 = pCache->Backend->pfnClose(pCache->pBackendData, true);
|
---|
[32370] | 5038 | AssertRC(rc2);
|
---|
[32536] | 5039 | pCache->pBackendData = NULL;
|
---|
[32370] | 5040 | }
|
---|
| 5041 | } while (0);
|
---|
| 5042 |
|
---|
| 5043 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 5044 | {
|
---|
| 5045 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 5046 | AssertRC(rc2);
|
---|
| 5047 | }
|
---|
| 5048 | else if (RT_UNLIKELY(fLockRead))
|
---|
| 5049 | {
|
---|
| 5050 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 5051 | AssertRC(rc2);
|
---|
| 5052 | }
|
---|
| 5053 |
|
---|
| 5054 | if (RT_FAILURE(rc))
|
---|
| 5055 | {
|
---|
| 5056 | if (pCache)
|
---|
| 5057 | {
|
---|
| 5058 | if (pCache->pszFilename)
|
---|
| 5059 | RTStrFree(pCache->pszFilename);
|
---|
| 5060 | RTMemFree(pCache);
|
---|
| 5061 | }
|
---|
| 5062 | }
|
---|
| 5063 |
|
---|
| 5064 | if (RT_SUCCESS(rc) && pCbProgress && pCbProgress->pfnProgress)
|
---|
| 5065 | pCbProgress->pfnProgress(pIfProgress->pvUser, 100);
|
---|
| 5066 |
|
---|
| 5067 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
| 5068 | return rc;
|
---|
| 5069 | }
|
---|
| 5070 |
|
---|
| 5071 | /**
|
---|
[6291] | 5072 | * Merges two images (not necessarily with direct parent/child relationship).
|
---|
| 5073 | * As a side effect the source image and potentially the other images which
|
---|
| 5074 | * are also merged to the destination are deleted from both the disk and the
|
---|
| 5075 | * images in the HDD container.
|
---|
[2379] | 5076 | *
|
---|
| 5077 | * @returns VBox status code.
|
---|
[15366] | 5078 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[6291] | 5079 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 5080 | * @param nImageFrom Name of the image file to merge from.
|
---|
| 5081 | * @param nImageTo Name of the image file to merge to.
|
---|
[11444] | 5082 | * @param pVDIfsOperation Pointer to the per-operation VD interface list.
|
---|
[2379] | 5083 | */
|
---|
[2590] | 5084 | VBOXDDU_DECL(int) VDMerge(PVBOXHDD pDisk, unsigned nImageFrom,
|
---|
[11444] | 5085 | unsigned nImageTo, PVDINTERFACE pVDIfsOperation)
|
---|
[2379] | 5086 | {
|
---|
[6291] | 5087 | int rc = VINF_SUCCESS;
|
---|
[27232] | 5088 | int rc2;
|
---|
| 5089 | bool fLockWrite = false, fLockRead = false;
|
---|
[6291] | 5090 | void *pvBuf = NULL;
|
---|
| 5091 |
|
---|
[11444] | 5092 | LogFlowFunc(("pDisk=%#p nImageFrom=%u nImageTo=%u pVDIfsOperation=%#p\n",
|
---|
| 5093 | pDisk, nImageFrom, nImageTo, pVDIfsOperation));
|
---|
| 5094 |
|
---|
| 5095 | PVDINTERFACE pIfProgress = VDInterfaceGet(pVDIfsOperation,
|
---|
| 5096 | VDINTERFACETYPE_PROGRESS);
|
---|
| 5097 | PVDINTERFACEPROGRESS pCbProgress = NULL;
|
---|
| 5098 | if (pIfProgress)
|
---|
| 5099 | pCbProgress = VDGetInterfaceProgress(pIfProgress);
|
---|
| 5100 |
|
---|
[6291] | 5101 | do
|
---|
| 5102 | {
|
---|
| 5103 | /* sanity check */
|
---|
[8569] | 5104 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 5105 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 5106 |
|
---|
[27806] | 5107 | /* For simplicity reasons lock for writing as the image reopen below
|
---|
| 5108 | * might need it. After all the reopen is usually needed. */
|
---|
| 5109 | rc2 = vdThreadStartWrite(pDisk);
|
---|
[27232] | 5110 | AssertRC(rc2);
|
---|
[32518] | 5111 | fLockWrite = true;
|
---|
[6291] | 5112 | PVDIMAGE pImageFrom = vdGetImageByNumber(pDisk, nImageFrom);
|
---|
| 5113 | PVDIMAGE pImageTo = vdGetImageByNumber(pDisk, nImageTo);
|
---|
| 5114 | if (!pImageFrom || !pImageTo)
|
---|
| 5115 | {
|
---|
[15366] | 5116 | rc = VERR_VD_IMAGE_NOT_FOUND;
|
---|
[6291] | 5117 | break;
|
---|
| 5118 | }
|
---|
[8569] | 5119 | AssertBreakStmt(pImageFrom != pImageTo, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 5120 |
|
---|
[7900] | 5121 | /* Make sure destination image is writable. */
|
---|
[32536] | 5122 | unsigned uOpenFlags = pImageTo->Backend->pfnGetOpenFlags(pImageTo->pBackendData);
|
---|
[6291] | 5123 | if (uOpenFlags & VD_OPEN_FLAGS_READONLY)
|
---|
| 5124 | {
|
---|
[7900] | 5125 | uOpenFlags &= ~VD_OPEN_FLAGS_READONLY;
|
---|
[32536] | 5126 | rc = pImageTo->Backend->pfnSetOpenFlags(pImageTo->pBackendData,
|
---|
[7900] | 5127 | uOpenFlags);
|
---|
[11266] | 5128 | if (RT_FAILURE(rc))
|
---|
[7900] | 5129 | break;
|
---|
[6291] | 5130 | }
|
---|
| 5131 |
|
---|
| 5132 | /* Get size of destination image. */
|
---|
[32536] | 5133 | uint64_t cbSize = pImageTo->Backend->pfnGetSize(pImageTo->pBackendData);
|
---|
[27806] | 5134 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
[27232] | 5135 | AssertRC(rc2);
|
---|
[32518] | 5136 | fLockWrite = false;
|
---|
[6291] | 5137 |
|
---|
| 5138 | /* Allocate tmp buffer. */
|
---|
| 5139 | pvBuf = RTMemTmpAlloc(VD_MERGE_BUFFER_SIZE);
|
---|
| 5140 | if (!pvBuf)
|
---|
| 5141 | {
|
---|
| 5142 | rc = VERR_NO_MEMORY;
|
---|
| 5143 | break;
|
---|
| 5144 | }
|
---|
| 5145 |
|
---|
| 5146 | /* Merging is done directly on the images itself. This potentially
|
---|
| 5147 | * causes trouble if the disk is full in the middle of operation. */
|
---|
| 5148 | if (nImageFrom < nImageTo)
|
---|
| 5149 | {
|
---|
| 5150 | /* Merge parent state into child. This means writing all not
|
---|
| 5151 | * allocated blocks in the destination image which are allocated in
|
---|
| 5152 | * the images to be merged. */
|
---|
| 5153 | uint64_t uOffset = 0;
|
---|
| 5154 | uint64_t cbRemaining = cbSize;
|
---|
| 5155 | do
|
---|
| 5156 | {
|
---|
| 5157 | size_t cbThisRead = RT_MIN(VD_MERGE_BUFFER_SIZE, cbRemaining);
|
---|
[27232] | 5158 |
|
---|
| 5159 | /* Need to hold the write lock during a read-write operation. */
|
---|
| 5160 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 5161 | AssertRC(rc2);
|
---|
| 5162 | fLockWrite = true;
|
---|
| 5163 |
|
---|
[32536] | 5164 | rc = pImageTo->Backend->pfnRead(pImageTo->pBackendData,
|
---|
[7277] | 5165 | uOffset, pvBuf, cbThisRead,
|
---|
| 5166 | &cbThisRead);
|
---|
[15366] | 5167 | if (rc == VERR_VD_BLOCK_FREE)
|
---|
[6291] | 5168 | {
|
---|
| 5169 | /* Search for image with allocated block. Do not attempt to
|
---|
| 5170 | * read more than the previous reads marked as valid.
|
---|
| 5171 | * Otherwise this would return stale data when different
|
---|
| 5172 | * block sizes are used for the images. */
|
---|
| 5173 | for (PVDIMAGE pCurrImage = pImageTo->pPrev;
|
---|
[15366] | 5174 | pCurrImage != NULL && pCurrImage != pImageFrom->pPrev && rc == VERR_VD_BLOCK_FREE;
|
---|
[6291] | 5175 | pCurrImage = pCurrImage->pPrev)
|
---|
| 5176 | {
|
---|
[32536] | 5177 | rc = pCurrImage->Backend->pfnRead(pCurrImage->pBackendData,
|
---|
[7277] | 5178 | uOffset, pvBuf,
|
---|
| 5179 | cbThisRead,
|
---|
| 5180 | &cbThisRead);
|
---|
[6291] | 5181 | }
|
---|
| 5182 |
|
---|
[15366] | 5183 | if (rc != VERR_VD_BLOCK_FREE)
|
---|
[6291] | 5184 | {
|
---|
[11266] | 5185 | if (RT_FAILURE(rc))
|
---|
[7900] | 5186 | break;
|
---|
[32370] | 5187 | /* Updating the cache is required because this might be a live merge. */
|
---|
[27211] | 5188 | rc = vdWriteHelper(pDisk, pImageTo, pImageFrom->pPrev,
|
---|
[32370] | 5189 | uOffset, pvBuf, cbThisRead,
|
---|
| 5190 | true /* fUpdateCache */);
|
---|
[11266] | 5191 | if (RT_FAILURE(rc))
|
---|
[6291] | 5192 | break;
|
---|
| 5193 | }
|
---|
[7900] | 5194 | else
|
---|
| 5195 | rc = VINF_SUCCESS;
|
---|
[6291] | 5196 | }
|
---|
[11266] | 5197 | else if (RT_FAILURE(rc))
|
---|
[7900] | 5198 | break;
|
---|
[6291] | 5199 |
|
---|
[27232] | 5200 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 5201 | AssertRC(rc2);
|
---|
| 5202 | fLockWrite = false;
|
---|
| 5203 |
|
---|
[6291] | 5204 | uOffset += cbThisRead;
|
---|
| 5205 | cbRemaining -= cbThisRead;
|
---|
[11444] | 5206 |
|
---|
[12143] | 5207 | if (pCbProgress && pCbProgress->pfnProgress)
|
---|
[11444] | 5208 | {
|
---|
[27806] | 5209 | /** @todo r=klaus: this can update the progress to the same
|
---|
| 5210 | * percentage over and over again if the image format makes
|
---|
| 5211 | * relatively small increments. */
|
---|
[27232] | 5212 | rc = pCbProgress->pfnProgress(pIfProgress->pvUser,
|
---|
| 5213 | uOffset * 99 / cbSize);
|
---|
[11444] | 5214 | if (RT_FAILURE(rc))
|
---|
| 5215 | break;
|
---|
| 5216 | }
|
---|
[6291] | 5217 | } while (uOffset < cbSize);
|
---|
| 5218 | }
|
---|
| 5219 | else
|
---|
| 5220 | {
|
---|
[27211] | 5221 | /*
|
---|
| 5222 | * We may need to update the parent uuid of the child coming after the
|
---|
| 5223 | * last image to be merged. We have to reopen it read/write.
|
---|
| 5224 | *
|
---|
| 5225 | * This is done before we do the actual merge to prevent an incosistent
|
---|
| 5226 | * chain if the mode change fails for some reason.
|
---|
| 5227 | */
|
---|
| 5228 | if (pImageFrom->pNext)
|
---|
| 5229 | {
|
---|
| 5230 | PVDIMAGE pImageChild = pImageFrom->pNext;
|
---|
| 5231 |
|
---|
[32518] | 5232 | /* Take the write lock. */
|
---|
| 5233 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 5234 | AssertRC(rc2);
|
---|
| 5235 | fLockWrite = true;
|
---|
| 5236 |
|
---|
[27211] | 5237 | /* We need to open the image in read/write mode. */
|
---|
[32536] | 5238 | uOpenFlags = pImageChild->Backend->pfnGetOpenFlags(pImageChild->pBackendData);
|
---|
[27211] | 5239 |
|
---|
| 5240 | if (uOpenFlags & VD_OPEN_FLAGS_READONLY)
|
---|
| 5241 | {
|
---|
| 5242 | uOpenFlags &= ~VD_OPEN_FLAGS_READONLY;
|
---|
[32536] | 5243 | rc = pImageChild->Backend->pfnSetOpenFlags(pImageChild->pBackendData,
|
---|
[27211] | 5244 | uOpenFlags);
|
---|
| 5245 | if (RT_FAILURE(rc))
|
---|
| 5246 | break;
|
---|
| 5247 | }
|
---|
[32518] | 5248 |
|
---|
| 5249 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 5250 | AssertRC(rc2);
|
---|
| 5251 | fLockWrite = false;
|
---|
[27211] | 5252 | }
|
---|
| 5253 |
|
---|
[6291] | 5254 | /* Merge child state into parent. This means writing all blocks
|
---|
| 5255 | * which are allocated in the image up to the source image to the
|
---|
| 5256 | * destination image. */
|
---|
| 5257 | uint64_t uOffset = 0;
|
---|
| 5258 | uint64_t cbRemaining = cbSize;
|
---|
| 5259 | do
|
---|
| 5260 | {
|
---|
| 5261 | size_t cbThisRead = RT_MIN(VD_MERGE_BUFFER_SIZE, cbRemaining);
|
---|
[15366] | 5262 | rc = VERR_VD_BLOCK_FREE;
|
---|
[27232] | 5263 |
|
---|
| 5264 | /* Need to hold the write lock during a read-write operation. */
|
---|
| 5265 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 5266 | AssertRC(rc2);
|
---|
| 5267 | fLockWrite = true;
|
---|
| 5268 |
|
---|
[6291] | 5269 | /* Search for image with allocated block. Do not attempt to
|
---|
| 5270 | * read more than the previous reads marked as valid. Otherwise
|
---|
| 5271 | * this would return stale data when different block sizes are
|
---|
| 5272 | * used for the images. */
|
---|
| 5273 | for (PVDIMAGE pCurrImage = pImageFrom;
|
---|
[15366] | 5274 | pCurrImage != NULL && pCurrImage != pImageTo && rc == VERR_VD_BLOCK_FREE;
|
---|
[6291] | 5275 | pCurrImage = pCurrImage->pPrev)
|
---|
| 5276 | {
|
---|
[32536] | 5277 | rc = pCurrImage->Backend->pfnRead(pCurrImage->pBackendData,
|
---|
[7277] | 5278 | uOffset, pvBuf,
|
---|
| 5279 | cbThisRead, &cbThisRead);
|
---|
[6291] | 5280 | }
|
---|
| 5281 |
|
---|
[15366] | 5282 | if (rc != VERR_VD_BLOCK_FREE)
|
---|
[6291] | 5283 | {
|
---|
[11266] | 5284 | if (RT_FAILURE(rc))
|
---|
[7900] | 5285 | break;
|
---|
[27211] | 5286 | rc = vdWriteHelper(pDisk, pImageTo, NULL, uOffset, pvBuf,
|
---|
[32370] | 5287 | cbThisRead, true /* fUpdateCache */);
|
---|
[11266] | 5288 | if (RT_FAILURE(rc))
|
---|
[6291] | 5289 | break;
|
---|
| 5290 | }
|
---|
[7900] | 5291 | else
|
---|
| 5292 | rc = VINF_SUCCESS;
|
---|
[6291] | 5293 |
|
---|
[27232] | 5294 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 5295 | AssertRC(rc2);
|
---|
[32518] | 5296 | fLockWrite = false;
|
---|
[27232] | 5297 |
|
---|
[6291] | 5298 | uOffset += cbThisRead;
|
---|
| 5299 | cbRemaining -= cbThisRead;
|
---|
[11444] | 5300 |
|
---|
[12143] | 5301 | if (pCbProgress && pCbProgress->pfnProgress)
|
---|
[11444] | 5302 | {
|
---|
[27806] | 5303 | /** @todo r=klaus: this can update the progress to the same
|
---|
| 5304 | * percentage over and over again if the image format makes
|
---|
| 5305 | * relatively small increments. */
|
---|
[27232] | 5306 | rc = pCbProgress->pfnProgress(pIfProgress->pvUser,
|
---|
| 5307 | uOffset * 99 / cbSize);
|
---|
[11444] | 5308 | if (RT_FAILURE(rc))
|
---|
| 5309 | break;
|
---|
| 5310 | }
|
---|
[6291] | 5311 | } while (uOffset < cbSize);
|
---|
| 5312 | }
|
---|
| 5313 |
|
---|
[32518] | 5314 | /*
|
---|
| 5315 | * Leave in case of an error to avoid corrupted data in the image chain
|
---|
| 5316 | * (includes cancelling the operation by the user).
|
---|
| 5317 | */
|
---|
[32519] | 5318 | if (RT_FAILURE(rc))
|
---|
[32518] | 5319 | break;
|
---|
| 5320 |
|
---|
[27232] | 5321 | /* Need to hold the write lock while finishing the merge. */
|
---|
| 5322 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 5323 | AssertRC(rc2);
|
---|
| 5324 | fLockWrite = true;
|
---|
| 5325 |
|
---|
[6291] | 5326 | /* Update parent UUID so that image chain is consistent. */
|
---|
| 5327 | RTUUID Uuid;
|
---|
[27213] | 5328 | PVDIMAGE pImageChild = NULL;
|
---|
[6291] | 5329 | if (nImageFrom < nImageTo)
|
---|
| 5330 | {
|
---|
[27359] | 5331 | if (pImageFrom->pPrev)
|
---|
[6291] | 5332 | {
|
---|
[32536] | 5333 | rc = pImageFrom->pPrev->Backend->pfnGetUuid(pImageFrom->pPrev->pBackendData,
|
---|
[27359] | 5334 | &Uuid);
|
---|
[6291] | 5335 | AssertRC(rc);
|
---|
| 5336 | }
|
---|
| 5337 | else
|
---|
| 5338 | RTUuidClear(&Uuid);
|
---|
[32536] | 5339 | rc = pImageTo->Backend->pfnSetParentUuid(pImageTo->pBackendData,
|
---|
[7277] | 5340 | &Uuid);
|
---|
[6291] | 5341 | AssertRC(rc);
|
---|
| 5342 | }
|
---|
| 5343 | else
|
---|
| 5344 | {
|
---|
[27211] | 5345 | /* Update the parent uuid of the child of the last merged image. */
|
---|
[6291] | 5346 | if (pImageFrom->pNext)
|
---|
| 5347 | {
|
---|
[32536] | 5348 | rc = pImageTo->Backend->pfnGetUuid(pImageTo->pBackendData,
|
---|
[7277] | 5349 | &Uuid);
|
---|
[6291] | 5350 | AssertRC(rc);
|
---|
[27211] | 5351 |
|
---|
[32536] | 5352 | rc = pImageFrom->Backend->pfnSetParentUuid(pImageFrom->pNext->pBackendData,
|
---|
[7277] | 5353 | &Uuid);
|
---|
[6291] | 5354 | AssertRC(rc);
|
---|
[27211] | 5355 |
|
---|
[27213] | 5356 | pImageChild = pImageFrom->pNext;
|
---|
[6291] | 5357 | }
|
---|
| 5358 | }
|
---|
| 5359 |
|
---|
| 5360 | /* Delete the no longer needed images. */
|
---|
| 5361 | PVDIMAGE pImg = pImageFrom, pTmp;
|
---|
| 5362 | while (pImg != pImageTo)
|
---|
| 5363 | {
|
---|
| 5364 | if (nImageFrom < nImageTo)
|
---|
| 5365 | pTmp = pImg->pNext;
|
---|
| 5366 | else
|
---|
| 5367 | pTmp = pImg->pPrev;
|
---|
| 5368 | vdRemoveImageFromList(pDisk, pImg);
|
---|
[32536] | 5369 | pImg->Backend->pfnClose(pImg->pBackendData, true);
|
---|
[13295] | 5370 | RTMemFree(pImg->pszFilename);
|
---|
| 5371 | RTMemFree(pImg);
|
---|
[6291] | 5372 | pImg = pTmp;
|
---|
| 5373 | }
|
---|
[27213] | 5374 |
|
---|
| 5375 | /* Make sure destination image is back to read only if necessary. */
|
---|
| 5376 | if (pImageTo != pDisk->pLast)
|
---|
| 5377 | {
|
---|
[32536] | 5378 | uOpenFlags = pImageTo->Backend->pfnGetOpenFlags(pImageTo->pBackendData);
|
---|
[27213] | 5379 | uOpenFlags |= VD_OPEN_FLAGS_READONLY;
|
---|
[32536] | 5380 | rc = pImageTo->Backend->pfnSetOpenFlags(pImageTo->pBackendData,
|
---|
[27213] | 5381 | uOpenFlags);
|
---|
| 5382 | if (RT_FAILURE(rc))
|
---|
| 5383 | break;
|
---|
| 5384 | }
|
---|
| 5385 |
|
---|
| 5386 | /*
|
---|
| 5387 | * Make sure the child is readonly
|
---|
| 5388 | * for the child -> parent merge direction
|
---|
| 5389 | * if neccessary.
|
---|
| 5390 | */
|
---|
| 5391 | if ( nImageFrom > nImageTo
|
---|
| 5392 | && pImageChild
|
---|
| 5393 | && pImageChild != pDisk->pLast)
|
---|
| 5394 | {
|
---|
[32536] | 5395 | uOpenFlags = pImageChild->Backend->pfnGetOpenFlags(pImageChild->pBackendData);
|
---|
[27213] | 5396 | uOpenFlags |= VD_OPEN_FLAGS_READONLY;
|
---|
[32536] | 5397 | rc = pImageChild->Backend->pfnSetOpenFlags(pImageChild->pBackendData,
|
---|
[27213] | 5398 | uOpenFlags);
|
---|
| 5399 | if (RT_FAILURE(rc))
|
---|
| 5400 | break;
|
---|
| 5401 | }
|
---|
[6291] | 5402 | } while (0);
|
---|
| 5403 |
|
---|
[27232] | 5404 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 5405 | {
|
---|
| 5406 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 5407 | AssertRC(rc2);
|
---|
| 5408 | }
|
---|
| 5409 | else if (RT_UNLIKELY(fLockRead))
|
---|
| 5410 | {
|
---|
| 5411 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 5412 | AssertRC(rc2);
|
---|
| 5413 | }
|
---|
| 5414 |
|
---|
[6291] | 5415 | if (pvBuf)
|
---|
| 5416 | RTMemTmpFree(pvBuf);
|
---|
| 5417 |
|
---|
[12143] | 5418 | if (RT_SUCCESS(rc) && pCbProgress && pCbProgress->pfnProgress)
|
---|
[27232] | 5419 | pCbProgress->pfnProgress(pIfProgress->pvUser, 100);
|
---|
[6291] | 5420 |
|
---|
[11284] | 5421 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[6291] | 5422 | return rc;
|
---|
[2379] | 5423 | }
|
---|
| 5424 |
|
---|
| 5425 | /**
|
---|
[6291] | 5426 | * Copies an image from one HDD container to another.
|
---|
| 5427 | * The copy is opened in the target HDD container.
|
---|
[2379] | 5428 | * It is possible to convert between different image formats, because the
|
---|
[7277] | 5429 | * backend for the destination may be different from the source.
|
---|
[6291] | 5430 | * If both the source and destination reference the same HDD container,
|
---|
| 5431 | * then the image is moved (by copying/deleting or renaming) to the new location.
|
---|
[2379] | 5432 | * The source container is unchanged if the move operation fails, otherwise
|
---|
| 5433 | * the image at the new location is opened in the same way as the old one was.
|
---|
| 5434 | *
|
---|
| 5435 | * @returns VBox status code.
|
---|
[15366] | 5436 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[6291] | 5437 | * @param pDiskFrom Pointer to source HDD container.
|
---|
[2379] | 5438 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
[6291] | 5439 | * @param pDiskTo Pointer to destination HDD container.
|
---|
[7277] | 5440 | * @param pszBackend Name of the image file backend to use.
|
---|
[6291] | 5441 | * @param pszFilename New name of the image (may be NULL if pDiskFrom == pDiskTo).
|
---|
| 5442 | * @param fMoveByRename If true, attempt to perform a move by renaming (if successful the new size is ignored).
|
---|
| 5443 | * @param cbSize New image size (0 means leave unchanged).
|
---|
[17836] | 5444 | * @param uImageFlags Flags specifying special destination image features.
|
---|
[15529] | 5445 | * @param pDstUuid New UUID of the destination image. If NULL, a new UUID is created.
|
---|
| 5446 | * This parameter is used if and only if a true copy is created.
|
---|
| 5447 | * In all rename/move cases the UUIDs are copied over.
|
---|
[11444] | 5448 | * @param pVDIfsOperation Pointer to the per-operation VD interface list.
|
---|
| 5449 | * @param pDstVDIfsImage Pointer to the per-image VD interface list, for the
|
---|
| 5450 | * destination image.
|
---|
| 5451 | * @param pDstVDIfsOperation Pointer to the per-image VD interface list,
|
---|
| 5452 | * for the destination image.
|
---|
[2379] | 5453 | */
|
---|
| 5454 | VBOXDDU_DECL(int) VDCopy(PVBOXHDD pDiskFrom, unsigned nImage, PVBOXHDD pDiskTo,
|
---|
[7277] | 5455 | const char *pszBackend, const char *pszFilename,
|
---|
[17836] | 5456 | bool fMoveByRename, uint64_t cbSize,
|
---|
| 5457 | unsigned uImageFlags, PCRTUUID pDstUuid,
|
---|
[11444] | 5458 | PVDINTERFACE pVDIfsOperation,
|
---|
| 5459 | PVDINTERFACE pDstVDIfsImage,
|
---|
| 5460 | PVDINTERFACE pDstVDIfsOperation)
|
---|
[2379] | 5461 | {
|
---|
[27245] | 5462 | int rc = VINF_SUCCESS;
|
---|
[27232] | 5463 | int rc2;
|
---|
| 5464 | bool fLockReadFrom = false, fLockWriteFrom = false, fLockWriteTo = false;
|
---|
[7690] | 5465 | void *pvBuf = NULL;
|
---|
| 5466 | PVDIMAGE pImageTo = NULL;
|
---|
| 5467 |
|
---|
[11444] | 5468 | LogFlowFunc(("pDiskFrom=%#p nImage=%u pDiskTo=%#p pszBackend=\"%s\" pszFilename=\"%s\" fMoveByRename=%d cbSize=%llu pVDIfsOperation=%#p pDstVDIfsImage=%#p pDstVDIfsOperation=%#p\n",
|
---|
| 5469 | pDiskFrom, nImage, pDiskTo, pszBackend, pszFilename, fMoveByRename, cbSize, pVDIfsOperation, pDstVDIfsImage, pDstVDIfsOperation));
|
---|
[7690] | 5470 |
|
---|
[11444] | 5471 | PVDINTERFACE pIfProgress = VDInterfaceGet(pVDIfsOperation,
|
---|
| 5472 | VDINTERFACETYPE_PROGRESS);
|
---|
| 5473 | PVDINTERFACEPROGRESS pCbProgress = NULL;
|
---|
| 5474 | if (pIfProgress)
|
---|
| 5475 | pCbProgress = VDGetInterfaceProgress(pIfProgress);
|
---|
| 5476 |
|
---|
| 5477 | PVDINTERFACE pDstIfProgress = VDInterfaceGet(pDstVDIfsOperation,
|
---|
| 5478 | VDINTERFACETYPE_PROGRESS);
|
---|
| 5479 | PVDINTERFACEPROGRESS pDstCbProgress = NULL;
|
---|
| 5480 | if (pDstIfProgress)
|
---|
| 5481 | pDstCbProgress = VDGetInterfaceProgress(pDstIfProgress);
|
---|
| 5482 |
|
---|
[7690] | 5483 | do {
|
---|
| 5484 | /* Check arguments. */
|
---|
[8565] | 5485 | AssertMsgBreakStmt(VALID_PTR(pDiskFrom), ("pDiskFrom=%#p\n", pDiskFrom),
|
---|
| 5486 | rc = VERR_INVALID_PARAMETER);
|
---|
[7690] | 5487 | AssertMsg(pDiskFrom->u32Signature == VBOXHDDDISK_SIGNATURE,
|
---|
[7967] | 5488 | ("u32Signature=%08x\n", pDiskFrom->u32Signature));
|
---|
[7690] | 5489 |
|
---|
[27232] | 5490 | rc2 = vdThreadStartRead(pDiskFrom);
|
---|
| 5491 | AssertRC(rc2);
|
---|
| 5492 | fLockReadFrom = true;
|
---|
[7690] | 5493 | PVDIMAGE pImageFrom = vdGetImageByNumber(pDiskFrom, nImage);
|
---|
[15366] | 5494 | AssertPtrBreakStmt(pImageFrom, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[8565] | 5495 | AssertMsgBreakStmt(VALID_PTR(pDiskTo), ("pDiskTo=%#p\n", pDiskTo),
|
---|
| 5496 | rc = VERR_INVALID_PARAMETER);
|
---|
[7690] | 5497 | AssertMsg(pDiskTo->u32Signature == VBOXHDDDISK_SIGNATURE,
|
---|
[7967] | 5498 | ("u32Signature=%08x\n", pDiskTo->u32Signature));
|
---|
[7690] | 5499 |
|
---|
[15529] | 5500 | /* Move the image. */
|
---|
| 5501 | if (pDiskFrom == pDiskTo)
|
---|
[7690] | 5502 | {
|
---|
[32536] | 5503 | /* Rename only works when backends are the same, are file based
|
---|
| 5504 | * and the rename method is implemented. */
|
---|
[15529] | 5505 | if ( fMoveByRename
|
---|
[32536] | 5506 | && !RTStrICmp(pszBackend, pImageFrom->Backend->pszBackendName)
|
---|
| 5507 | && pImageFrom->Backend->uBackendCaps & VD_CAP_FILE
|
---|
| 5508 | && pImageFrom->Backend->pfnRename)
|
---|
[15529] | 5509 | {
|
---|
[27232] | 5510 | rc2 = vdThreadFinishRead(pDiskFrom);
|
---|
| 5511 | AssertRC(rc2);
|
---|
| 5512 | fLockReadFrom = false;
|
---|
| 5513 |
|
---|
| 5514 | rc2 = vdThreadStartWrite(pDiskFrom);
|
---|
| 5515 | AssertRC(rc2);
|
---|
| 5516 | fLockWriteFrom = true;
|
---|
[32536] | 5517 | rc = pImageFrom->Backend->pfnRename(pImageFrom->pBackendData, pszFilename ? pszFilename : pImageFrom->pszFilename);
|
---|
[7690] | 5518 | break;
|
---|
[15529] | 5519 | }
|
---|
[7690] | 5520 |
|
---|
[15529] | 5521 | /** @todo Moving (including shrinking/growing) of the image is
|
---|
| 5522 | * requested, but the rename attempt failed or it wasn't possible.
|
---|
| 5523 | * Must now copy image to temp location. */
|
---|
| 5524 | AssertReleaseMsgFailed(("VDCopy: moving by copy/delete not implemented\n"));
|
---|
[7690] | 5525 | }
|
---|
| 5526 |
|
---|
[21025] | 5527 | /* pszFilename is allowed to be NULL, as this indicates copy to the existing image. */
|
---|
| 5528 | AssertMsgBreakStmt(pszFilename == NULL || (VALID_PTR(pszFilename) && *pszFilename),
|
---|
[8565] | 5529 | ("pszFilename=%#p \"%s\"\n", pszFilename, pszFilename),
|
---|
| 5530 | rc = VERR_INVALID_PARAMETER);
|
---|
[7690] | 5531 |
|
---|
[9560] | 5532 | uint64_t cbSizeFrom;
|
---|
[32536] | 5533 | cbSizeFrom = pImageFrom->Backend->pfnGetSize(pImageFrom->pBackendData);
|
---|
[7690] | 5534 | if (cbSizeFrom == 0)
|
---|
| 5535 | {
|
---|
[15366] | 5536 | rc = VERR_VD_VALUE_NOT_FOUND;
|
---|
[7690] | 5537 | break;
|
---|
| 5538 | }
|
---|
[7967] | 5539 |
|
---|
[32536] | 5540 | VDGEOMETRY PCHSGeometryFrom = {0, 0, 0};
|
---|
| 5541 | VDGEOMETRY LCHSGeometryFrom = {0, 0, 0};
|
---|
| 5542 | pImageFrom->Backend->pfnGetPCHSGeometry(pImageFrom->pBackendData, &PCHSGeometryFrom);
|
---|
| 5543 | pImageFrom->Backend->pfnGetLCHSGeometry(pImageFrom->pBackendData, &LCHSGeometryFrom);
|
---|
[7967] | 5544 |
|
---|
[15529] | 5545 | RTUUID ImageUuid, ImageModificationUuid;
|
---|
| 5546 | if (pDiskFrom != pDiskTo)
|
---|
| 5547 | {
|
---|
| 5548 | if (pDstUuid)
|
---|
| 5549 | ImageUuid = *pDstUuid;
|
---|
| 5550 | else
|
---|
| 5551 | RTUuidCreate(&ImageUuid);
|
---|
| 5552 | }
|
---|
| 5553 | else
|
---|
| 5554 | {
|
---|
[32536] | 5555 | rc = pImageFrom->Backend->pfnGetUuid(pImageFrom->pBackendData, &ImageUuid);
|
---|
[15529] | 5556 | if (RT_FAILURE(rc))
|
---|
[15566] | 5557 | RTUuidCreate(&ImageUuid);
|
---|
[15529] | 5558 | }
|
---|
[32536] | 5559 | rc = pImageFrom->Backend->pfnGetModificationUuid(pImageFrom->pBackendData, &ImageModificationUuid);
|
---|
[15529] | 5560 | if (RT_FAILURE(rc))
|
---|
| 5561 | RTUuidClear(&ImageModificationUuid);
|
---|
| 5562 |
|
---|
| 5563 | char szComment[1024];
|
---|
[32536] | 5564 | rc = pImageFrom->Backend->pfnGetComment(pImageFrom->pBackendData, szComment, sizeof(szComment));
|
---|
[15529] | 5565 | if (RT_FAILURE(rc))
|
---|
| 5566 | szComment[0] = '\0';
|
---|
| 5567 | else
|
---|
| 5568 | szComment[sizeof(szComment) - 1] = '\0';
|
---|
| 5569 |
|
---|
[7690] | 5570 | unsigned uOpenFlagsFrom;
|
---|
[32536] | 5571 | uOpenFlagsFrom = pImageFrom->Backend->pfnGetOpenFlags(pImageFrom->pBackendData);
|
---|
[7690] | 5572 |
|
---|
[27232] | 5573 | rc2 = vdThreadFinishRead(pDiskFrom);
|
---|
| 5574 | AssertRC(rc2);
|
---|
| 5575 | fLockReadFrom = false;
|
---|
| 5576 |
|
---|
[29497] | 5577 | rc2 = vdThreadStartRead(pDiskTo);
|
---|
| 5578 | AssertRC(rc2);
|
---|
| 5579 | unsigned cImagesTo = pDiskTo->cImages;
|
---|
| 5580 | rc2 = vdThreadFinishRead(pDiskTo);
|
---|
| 5581 | AssertRC(rc2);
|
---|
| 5582 |
|
---|
[21025] | 5583 | if (pszFilename)
|
---|
[7690] | 5584 | {
|
---|
[21025] | 5585 | if (cbSize == 0)
|
---|
| 5586 | cbSize = cbSizeFrom;
|
---|
[16963] | 5587 |
|
---|
[29497] | 5588 | /* Create destination image with the properties of source image. */
|
---|
[21025] | 5589 | /** @todo replace the VDCreateDiff/VDCreateBase calls by direct
|
---|
| 5590 | * calls to the backend. Unifies the code and reduces the API
|
---|
[27232] | 5591 | * dependencies. Would also make the synchronization explicit. */
|
---|
[29497] | 5592 | if (cImagesTo > 0)
|
---|
[21025] | 5593 | {
|
---|
[29497] | 5594 | rc = VDCreateDiff(pDiskTo, pszBackend, pszFilename,
|
---|
| 5595 | uImageFlags, szComment, &ImageUuid,
|
---|
| 5596 | NULL /* pParentUuid */,
|
---|
| 5597 | uOpenFlagsFrom & ~VD_OPEN_FLAGS_READONLY,
|
---|
[32858] | 5598 | pDstVDIfsImage, NULL);
|
---|
[27232] | 5599 |
|
---|
| 5600 | rc2 = vdThreadStartWrite(pDiskTo);
|
---|
| 5601 | AssertRC(rc2);
|
---|
| 5602 | fLockWriteTo = true;
|
---|
[21025] | 5603 | } else {
|
---|
[27232] | 5604 | /** @todo hack to force creation of a fixed image for
|
---|
| 5605 | * the RAW backend, which can't handle anything else. */
|
---|
[21025] | 5606 | if (!RTStrICmp(pszBackend, "RAW"))
|
---|
| 5607 | uImageFlags |= VD_IMAGE_FLAGS_FIXED;
|
---|
| 5608 |
|
---|
[24439] | 5609 | /* Fix broken PCHS geometry. Can happen for two reasons: either
|
---|
| 5610 | * the backend mixes up PCHS and LCHS, or the application used
|
---|
| 5611 | * to create the source image has put garbage in it. */
|
---|
| 5612 | /** @todo double-check if the VHD backend correctly handles
|
---|
| 5613 | * PCHS and LCHS geometry. also reconsider our current paranoia
|
---|
| 5614 | * level when it comes to geometry settings here and in the
|
---|
| 5615 | * backends. */
|
---|
| 5616 | if (PCHSGeometryFrom.cHeads > 16 || PCHSGeometryFrom.cSectors > 63)
|
---|
| 5617 | {
|
---|
| 5618 | Assert(RT_MIN(cbSize / 512 / 16 / 63, 16383) - (uint32_t)RT_MIN(cbSize / 512 / 16 / 63, 16383));
|
---|
| 5619 | PCHSGeometryFrom.cCylinders = (uint32_t)RT_MIN(cbSize / 512 / 16 / 63, 16383);
|
---|
| 5620 | PCHSGeometryFrom.cHeads = 16;
|
---|
| 5621 | PCHSGeometryFrom.cSectors = 63;
|
---|
| 5622 | }
|
---|
| 5623 |
|
---|
[21025] | 5624 | rc = VDCreateBase(pDiskTo, pszBackend, pszFilename, cbSize,
|
---|
| 5625 | uImageFlags, szComment,
|
---|
| 5626 | &PCHSGeometryFrom, &LCHSGeometryFrom,
|
---|
[32858] | 5627 | NULL, uOpenFlagsFrom & ~VD_OPEN_FLAGS_READONLY, pDstVDIfsImage, NULL);
|
---|
[27245] | 5628 |
|
---|
[27232] | 5629 | rc2 = vdThreadStartWrite(pDiskTo);
|
---|
| 5630 | AssertRC(rc2);
|
---|
| 5631 | fLockWriteTo = true;
|
---|
| 5632 |
|
---|
[21025] | 5633 | if (RT_SUCCESS(rc) && !RTUuidIsNull(&ImageUuid))
|
---|
[32536] | 5634 | pDiskTo->pLast->Backend->pfnSetUuid(pDiskTo->pLast->pBackendData, &ImageUuid);
|
---|
[21025] | 5635 | }
|
---|
| 5636 | if (RT_FAILURE(rc))
|
---|
| 5637 | break;
|
---|
| 5638 |
|
---|
| 5639 | pImageTo = pDiskTo->pLast;
|
---|
| 5640 | AssertPtrBreakStmt(pImageTo, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[21030] | 5641 |
|
---|
| 5642 | cbSize = RT_MIN(cbSize, cbSizeFrom);
|
---|
[7690] | 5643 | }
|
---|
[21025] | 5644 | else
|
---|
| 5645 | {
|
---|
| 5646 | pImageTo = pDiskTo->pLast;
|
---|
| 5647 | AssertPtrBreakStmt(pImageTo, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[7690] | 5648 |
|
---|
[21025] | 5649 | uint64_t cbSizeTo;
|
---|
[32536] | 5650 | cbSizeTo = pImageTo->Backend->pfnGetSize(pImageTo->pBackendData);
|
---|
[21025] | 5651 | if (cbSizeTo == 0)
|
---|
| 5652 | {
|
---|
| 5653 | rc = VERR_VD_VALUE_NOT_FOUND;
|
---|
| 5654 | break;
|
---|
| 5655 | }
|
---|
[7690] | 5656 |
|
---|
[21025] | 5657 | if (cbSize == 0)
|
---|
| 5658 | cbSize = RT_MIN(cbSizeFrom, cbSizeTo);
|
---|
| 5659 | }
|
---|
| 5660 |
|
---|
[27232] | 5661 | rc2 = vdThreadFinishWrite(pDiskTo);
|
---|
| 5662 | AssertRC(rc2);
|
---|
| 5663 | fLockWriteTo = false;
|
---|
| 5664 |
|
---|
[7690] | 5665 | /* Allocate tmp buffer. */
|
---|
| 5666 | pvBuf = RTMemTmpAlloc(VD_MERGE_BUFFER_SIZE);
|
---|
| 5667 | if (!pvBuf)
|
---|
| 5668 | {
|
---|
| 5669 | rc = VERR_NO_MEMORY;
|
---|
| 5670 | break;
|
---|
| 5671 | }
|
---|
| 5672 |
|
---|
[30313] | 5673 | /* Whether we can take the optimized copy path (false) or not.
|
---|
| 5674 | * Don't optimize if the image existed or if it is a child image. */
|
---|
| 5675 | bool fRegularRead = (pszFilename == NULL) || (cImagesTo > 0);
|
---|
| 5676 |
|
---|
[7690] | 5677 | /* Copy the data. */
|
---|
| 5678 | uint64_t uOffset = 0;
|
---|
| 5679 | uint64_t cbRemaining = cbSize;
|
---|
[7967] | 5680 |
|
---|
[7690] | 5681 | do
|
---|
| 5682 | {
|
---|
| 5683 | size_t cbThisRead = RT_MIN(VD_MERGE_BUFFER_SIZE, cbRemaining);
|
---|
| 5684 |
|
---|
[27232] | 5685 | /* Note that we don't attempt to synchronize cross-disk accesses.
|
---|
| 5686 | * It wouldn't be very difficult to do, just the lock order would
|
---|
| 5687 | * need to be defined somehow to prevent deadlocks. Postpone such
|
---|
| 5688 | * magic as there is no use case for this. */
|
---|
| 5689 |
|
---|
| 5690 | rc2 = vdThreadStartRead(pDiskFrom);
|
---|
| 5691 | AssertRC(rc2);
|
---|
| 5692 | fLockReadFrom = true;
|
---|
| 5693 |
|
---|
[32370] | 5694 | /*
|
---|
| 5695 | * Updating the cache doesn't make any sense
|
---|
| 5696 | * as we are looping once through the image.
|
---|
| 5697 | */
|
---|
[27211] | 5698 | rc = vdReadHelper(pDiskFrom, pImageFrom, NULL, uOffset, pvBuf,
|
---|
[32370] | 5699 | cbThisRead, fRegularRead,
|
---|
| 5700 | false /* fUpdateCache */);
|
---|
[30313] | 5701 | if (RT_FAILURE(rc) && rc != VERR_VD_BLOCK_FREE)
|
---|
[7690] | 5702 | break;
|
---|
| 5703 |
|
---|
[27232] | 5704 | rc2 = vdThreadFinishRead(pDiskFrom);
|
---|
| 5705 | AssertRC(rc2);
|
---|
| 5706 | fLockReadFrom = false;
|
---|
| 5707 |
|
---|
[30313] | 5708 | if (rc != VERR_VD_BLOCK_FREE)
|
---|
| 5709 | {
|
---|
| 5710 | rc2 = vdThreadStartWrite(pDiskTo);
|
---|
| 5711 | AssertRC(rc2);
|
---|
| 5712 | fLockWriteTo = true;
|
---|
[27232] | 5713 |
|
---|
[30313] | 5714 | rc = vdWriteHelper(pDiskTo, pImageTo, NULL, uOffset, pvBuf,
|
---|
[32370] | 5715 | cbThisRead, false /* fUpdateCache */);
|
---|
[30313] | 5716 | if (RT_FAILURE(rc))
|
---|
| 5717 | break;
|
---|
[7690] | 5718 |
|
---|
[30313] | 5719 | rc2 = vdThreadFinishWrite(pDiskTo);
|
---|
| 5720 | AssertRC(rc2);
|
---|
| 5721 | fLockWriteTo = false;
|
---|
| 5722 | }
|
---|
[32381] | 5723 | else /* Don't propagate the error to the outside */
|
---|
| 5724 | rc = VINF_SUCCESS;
|
---|
[27232] | 5725 |
|
---|
[7690] | 5726 | uOffset += cbThisRead;
|
---|
| 5727 | cbRemaining -= cbThisRead;
|
---|
[11444] | 5728 |
|
---|
[12143] | 5729 | if (pCbProgress && pCbProgress->pfnProgress)
|
---|
[7690] | 5730 | {
|
---|
[27806] | 5731 | /** @todo r=klaus: this can update the progress to the same
|
---|
| 5732 | * percentage over and over again if the image format makes
|
---|
| 5733 | * relatively small increments. */
|
---|
[27232] | 5734 | rc = pCbProgress->pfnProgress(pIfProgress->pvUser,
|
---|
| 5735 | uOffset * 99 / cbSize);
|
---|
[11266] | 5736 | if (RT_FAILURE(rc))
|
---|
[7690] | 5737 | break;
|
---|
| 5738 | }
|
---|
[12774] | 5739 | if (pDstCbProgress && pDstCbProgress->pfnProgress)
|
---|
[11444] | 5740 | {
|
---|
[27806] | 5741 | /** @todo r=klaus: this can update the progress to the same
|
---|
| 5742 | * percentage over and over again if the image format makes
|
---|
| 5743 | * relatively small increments. */
|
---|
[27232] | 5744 | rc = pDstCbProgress->pfnProgress(pDstIfProgress->pvUser,
|
---|
| 5745 | uOffset * 99 / cbSize);
|
---|
[11444] | 5746 | if (RT_FAILURE(rc))
|
---|
| 5747 | break;
|
---|
| 5748 | }
|
---|
[7690] | 5749 | } while (uOffset < cbSize);
|
---|
| 5750 |
|
---|
[15529] | 5751 | if (RT_SUCCESS(rc))
|
---|
[7690] | 5752 | {
|
---|
[27232] | 5753 | rc2 = vdThreadStartWrite(pDiskTo);
|
---|
| 5754 | AssertRC(rc2);
|
---|
| 5755 | fLockWriteTo = true;
|
---|
| 5756 |
|
---|
[24439] | 5757 | /* Only set modification UUID if it is non-null, since the source
|
---|
| 5758 | * backend might not provide a valid modification UUID. */
|
---|
| 5759 | if (!RTUuidIsNull(&ImageModificationUuid))
|
---|
[32536] | 5760 | pImageTo->Backend->pfnSetModificationUuid(pImageTo->pBackendData, &ImageModificationUuid);
|
---|
[7690] | 5761 | }
|
---|
| 5762 | } while (0);
|
---|
| 5763 |
|
---|
[21025] | 5764 | if (RT_FAILURE(rc) && pImageTo && pszFilename)
|
---|
[7690] | 5765 | {
|
---|
[27232] | 5766 | /* Take the write lock only if it is not taken. Not worth making the
|
---|
| 5767 | * above code even more complicated. */
|
---|
| 5768 | if (RT_UNLIKELY(!fLockWriteTo))
|
---|
| 5769 | {
|
---|
| 5770 | rc2 = vdThreadStartWrite(pDiskTo);
|
---|
| 5771 | AssertRC(rc2);
|
---|
| 5772 | fLockWriteTo = true;
|
---|
| 5773 | }
|
---|
[7690] | 5774 | /* Error detected, but new image created. Remove image from list. */
|
---|
| 5775 | vdRemoveImageFromList(pDiskTo, pImageTo);
|
---|
| 5776 |
|
---|
| 5777 | /* Close and delete image. */
|
---|
[32536] | 5778 | rc2 = pImageTo->Backend->pfnClose(pImageTo->pBackendData, true);
|
---|
[7690] | 5779 | AssertRC(rc2);
|
---|
[32536] | 5780 | pImageTo->pBackendData = NULL;
|
---|
[7690] | 5781 |
|
---|
| 5782 | /* Free remaining resources. */
|
---|
| 5783 | if (pImageTo->pszFilename)
|
---|
| 5784 | RTStrFree(pImageTo->pszFilename);
|
---|
[7967] | 5785 |
|
---|
[7690] | 5786 | RTMemFree(pImageTo);
|
---|
| 5787 | }
|
---|
| 5788 |
|
---|
[27232] | 5789 | if (RT_UNLIKELY(fLockWriteTo))
|
---|
| 5790 | {
|
---|
| 5791 | rc2 = vdThreadFinishWrite(pDiskTo);
|
---|
| 5792 | AssertRC(rc2);
|
---|
| 5793 | }
|
---|
| 5794 | if (RT_UNLIKELY(fLockWriteFrom))
|
---|
| 5795 | {
|
---|
| 5796 | rc2 = vdThreadFinishWrite(pDiskFrom);
|
---|
| 5797 | AssertRC(rc2);
|
---|
| 5798 | }
|
---|
| 5799 | else if (RT_UNLIKELY(fLockReadFrom))
|
---|
| 5800 | {
|
---|
| 5801 | rc2 = vdThreadFinishRead(pDiskFrom);
|
---|
| 5802 | AssertRC(rc2);
|
---|
| 5803 | }
|
---|
| 5804 |
|
---|
[7690] | 5805 | if (pvBuf)
|
---|
| 5806 | RTMemTmpFree(pvBuf);
|
---|
| 5807 |
|
---|
[11444] | 5808 | if (RT_SUCCESS(rc))
|
---|
| 5809 | {
|
---|
[12143] | 5810 | if (pCbProgress && pCbProgress->pfnProgress)
|
---|
[27232] | 5811 | pCbProgress->pfnProgress(pIfProgress->pvUser, 100);
|
---|
[12774] | 5812 | if (pDstCbProgress && pDstCbProgress->pfnProgress)
|
---|
[27232] | 5813 | pDstCbProgress->pfnProgress(pDstIfProgress->pvUser, 100);
|
---|
[11444] | 5814 | }
|
---|
[7690] | 5815 |
|
---|
[11284] | 5816 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[7690] | 5817 | return rc;
|
---|
[2379] | 5818 | }
|
---|
| 5819 |
|
---|
| 5820 | /**
|
---|
[19034] | 5821 | * Optimizes the storage consumption of an image. Typically the unused blocks
|
---|
| 5822 | * have to be wiped with zeroes to achieve a substantial reduced storage use.
|
---|
| 5823 | * Another optimization done is reordering the image blocks, which can provide
|
---|
| 5824 | * a significant performance boost, as reads and writes tend to use less random
|
---|
| 5825 | * file offsets.
|
---|
| 5826 | *
|
---|
| 5827 | * @return VBox status code.
|
---|
| 5828 | * @return VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
| 5829 | * @return VERR_VD_IMAGE_READ_ONLY if image is not writable.
|
---|
[19176] | 5830 | * @return VERR_NOT_SUPPORTED if this kind of image can be compacted, but
|
---|
| 5831 | * the code for this isn't implemented yet.
|
---|
[19034] | 5832 | * @param pDisk Pointer to HDD container.
|
---|
| 5833 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 5834 | * @param pVDIfsOperation Pointer to the per-operation VD interface list.
|
---|
| 5835 | */
|
---|
| 5836 | VBOXDDU_DECL(int) VDCompact(PVBOXHDD pDisk, unsigned nImage,
|
---|
| 5837 | PVDINTERFACE pVDIfsOperation)
|
---|
| 5838 | {
|
---|
[27232] | 5839 | int rc = VINF_SUCCESS;
|
---|
| 5840 | int rc2;
|
---|
| 5841 | bool fLockRead = false, fLockWrite = false;
|
---|
[19176] | 5842 | void *pvBuf = NULL;
|
---|
| 5843 | void *pvTmp = NULL;
|
---|
| 5844 |
|
---|
| 5845 | LogFlowFunc(("pDisk=%#p nImage=%u pVDIfsOperation=%#p\n",
|
---|
| 5846 | pDisk, nImage, pVDIfsOperation));
|
---|
| 5847 |
|
---|
| 5848 | PVDINTERFACE pIfProgress = VDInterfaceGet(pVDIfsOperation,
|
---|
| 5849 | VDINTERFACETYPE_PROGRESS);
|
---|
| 5850 | PVDINTERFACEPROGRESS pCbProgress = NULL;
|
---|
| 5851 | if (pIfProgress)
|
---|
| 5852 | pCbProgress = VDGetInterfaceProgress(pIfProgress);
|
---|
| 5853 |
|
---|
| 5854 | do {
|
---|
| 5855 | /* Check arguments. */
|
---|
| 5856 | AssertMsgBreakStmt(VALID_PTR(pDisk), ("pDisk=%#p\n", pDisk),
|
---|
| 5857 | rc = VERR_INVALID_PARAMETER);
|
---|
| 5858 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE,
|
---|
| 5859 | ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 5860 |
|
---|
[27232] | 5861 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 5862 | AssertRC(rc2);
|
---|
| 5863 | fLockRead = true;
|
---|
| 5864 |
|
---|
[19176] | 5865 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
| 5866 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
| 5867 |
|
---|
| 5868 | /* If there is no compact callback for not file based backends then
|
---|
| 5869 | * the backend doesn't need compaction. No need to make much fuss about
|
---|
| 5870 | * this. For file based ones signal this as not yet supported. */
|
---|
| 5871 | if (!pImage->Backend->pfnCompact)
|
---|
| 5872 | {
|
---|
| 5873 | if (pImage->Backend->uBackendCaps & VD_CAP_FILE)
|
---|
| 5874 | rc = VERR_NOT_SUPPORTED;
|
---|
| 5875 | else
|
---|
| 5876 | rc = VINF_SUCCESS;
|
---|
| 5877 | break;
|
---|
| 5878 | }
|
---|
| 5879 |
|
---|
| 5880 | /* Insert interface for reading parent state into per-operation list,
|
---|
| 5881 | * if there is a parent image. */
|
---|
| 5882 | VDINTERFACE IfOpParent;
|
---|
| 5883 | VDINTERFACEPARENTSTATE ParentCb;
|
---|
| 5884 | VDPARENTSTATEDESC ParentUser;
|
---|
| 5885 | if (pImage->pPrev)
|
---|
| 5886 | {
|
---|
| 5887 | ParentCb.cbSize = sizeof(ParentCb);
|
---|
| 5888 | ParentCb.enmInterface = VDINTERFACETYPE_PARENTSTATE;
|
---|
| 5889 | ParentCb.pfnParentRead = vdParentRead;
|
---|
| 5890 | ParentUser.pDisk = pDisk;
|
---|
| 5891 | ParentUser.pImage = pImage->pPrev;
|
---|
| 5892 | rc = VDInterfaceAdd(&IfOpParent, "VDCompact_ParentState", VDINTERFACETYPE_PARENTSTATE,
|
---|
| 5893 | &ParentCb, &ParentUser, &pVDIfsOperation);
|
---|
| 5894 | AssertRC(rc);
|
---|
| 5895 | }
|
---|
| 5896 |
|
---|
[27232] | 5897 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 5898 | AssertRC(rc2);
|
---|
| 5899 | fLockRead = false;
|
---|
| 5900 |
|
---|
| 5901 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 5902 | AssertRC(rc2);
|
---|
| 5903 | fLockWrite = true;
|
---|
| 5904 |
|
---|
[32536] | 5905 | rc = pImage->Backend->pfnCompact(pImage->pBackendData,
|
---|
[19176] | 5906 | 0, 99,
|
---|
[27232] | 5907 | pDisk->pVDIfsDisk,
|
---|
| 5908 | pImage->pVDIfsImage,
|
---|
[19176] | 5909 | pVDIfsOperation);
|
---|
| 5910 | } while (0);
|
---|
| 5911 |
|
---|
[27232] | 5912 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 5913 | {
|
---|
| 5914 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 5915 | AssertRC(rc2);
|
---|
| 5916 | }
|
---|
| 5917 | else if (RT_UNLIKELY(fLockRead))
|
---|
| 5918 | {
|
---|
| 5919 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 5920 | AssertRC(rc2);
|
---|
| 5921 | }
|
---|
| 5922 |
|
---|
[19176] | 5923 | if (pvBuf)
|
---|
| 5924 | RTMemTmpFree(pvBuf);
|
---|
| 5925 | if (pvTmp)
|
---|
| 5926 | RTMemTmpFree(pvTmp);
|
---|
| 5927 |
|
---|
| 5928 | if (RT_SUCCESS(rc))
|
---|
| 5929 | {
|
---|
| 5930 | if (pCbProgress && pCbProgress->pfnProgress)
|
---|
[27232] | 5931 | pCbProgress->pfnProgress(pIfProgress->pvUser, 100);
|
---|
[19176] | 5932 | }
|
---|
| 5933 |
|
---|
| 5934 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
| 5935 | return rc;
|
---|
[19034] | 5936 | }
|
---|
| 5937 |
|
---|
| 5938 | /**
|
---|
[31776] | 5939 | * Resizes the the given disk image to the given size.
|
---|
| 5940 | *
|
---|
[32431] | 5941 | * @return VBox status
|
---|
[31776] | 5942 | * @return VERR_VD_IMAGE_READ_ONLY if image is not writable.
|
---|
| 5943 | * @return VERR_NOT_SUPPORTED if this kind of image can be compacted, but
|
---|
| 5944 | *
|
---|
| 5945 | * @param pDisk Pointer to the HDD container.
|
---|
| 5946 | * @param cbSize New size of the image.
|
---|
| 5947 | * @param pPCHSGeometry Pointer to the new physical disk geometry <= (16383,16,63). Not NULL.
|
---|
| 5948 | * @param pLCHSGeometry Pointer to the new logical disk geometry <= (x,255,63). Not NULL.
|
---|
| 5949 | * @param pVDIfsOperation Pointer to the per-operation VD interface list.
|
---|
| 5950 | */
|
---|
| 5951 | VBOXDDU_DECL(int) VDResize(PVBOXHDD pDisk, uint64_t cbSize,
|
---|
[32536] | 5952 | PCVDGEOMETRY pPCHSGeometry,
|
---|
| 5953 | PCVDGEOMETRY pLCHSGeometry,
|
---|
[31776] | 5954 | PVDINTERFACE pVDIfsOperation)
|
---|
| 5955 | {
|
---|
[32536] | 5956 | /** @todo r=klaus resizing was designed to be part of VDCopy, so having a separate function is not desirable. */
|
---|
[31776] | 5957 | int rc = VINF_SUCCESS;
|
---|
| 5958 | int rc2;
|
---|
| 5959 | bool fLockRead = false, fLockWrite = false;
|
---|
| 5960 |
|
---|
| 5961 | LogFlowFunc(("pDisk=%#p cbSize=%llu pVDIfsOperation=%#p\n",
|
---|
| 5962 | pDisk, cbSize, pVDIfsOperation));
|
---|
| 5963 |
|
---|
| 5964 | PVDINTERFACE pIfProgress = VDInterfaceGet(pVDIfsOperation,
|
---|
| 5965 | VDINTERFACETYPE_PROGRESS);
|
---|
| 5966 | PVDINTERFACEPROGRESS pCbProgress = NULL;
|
---|
| 5967 | if (pIfProgress)
|
---|
| 5968 | pCbProgress = VDGetInterfaceProgress(pIfProgress);
|
---|
| 5969 |
|
---|
| 5970 | do {
|
---|
| 5971 | /* Check arguments. */
|
---|
| 5972 | AssertMsgBreakStmt(VALID_PTR(pDisk), ("pDisk=%#p\n", pDisk),
|
---|
| 5973 | rc = VERR_INVALID_PARAMETER);
|
---|
| 5974 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE,
|
---|
| 5975 | ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 5976 |
|
---|
| 5977 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 5978 | AssertRC(rc2);
|
---|
| 5979 | fLockRead = true;
|
---|
| 5980 |
|
---|
| 5981 | /* Not supported if the disk has child images attached. */
|
---|
| 5982 | AssertMsgBreakStmt(pDisk->cImages == 1, ("cImages=%u\n", pDisk->cImages),
|
---|
| 5983 | rc = VERR_NOT_SUPPORTED);
|
---|
| 5984 |
|
---|
| 5985 | PVDIMAGE pImage = pDisk->pBase;
|
---|
| 5986 |
|
---|
| 5987 | /* If there is no compact callback for not file based backends then
|
---|
| 5988 | * the backend doesn't need compaction. No need to make much fuss about
|
---|
| 5989 | * this. For file based ones signal this as not yet supported. */
|
---|
| 5990 | if (!pImage->Backend->pfnResize)
|
---|
| 5991 | {
|
---|
| 5992 | if (pImage->Backend->uBackendCaps & VD_CAP_FILE)
|
---|
| 5993 | rc = VERR_NOT_SUPPORTED;
|
---|
| 5994 | else
|
---|
| 5995 | rc = VINF_SUCCESS;
|
---|
| 5996 | break;
|
---|
| 5997 | }
|
---|
| 5998 |
|
---|
| 5999 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 6000 | AssertRC(rc2);
|
---|
| 6001 | fLockRead = false;
|
---|
| 6002 |
|
---|
| 6003 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 6004 | AssertRC(rc2);
|
---|
| 6005 | fLockWrite = true;
|
---|
| 6006 |
|
---|
[32536] | 6007 | VDGEOMETRY PCHSGeometryOld;
|
---|
| 6008 | VDGEOMETRY LCHSGeometryOld;
|
---|
| 6009 | PCVDGEOMETRY pPCHSGeometryNew;
|
---|
| 6010 | PCVDGEOMETRY pLCHSGeometryNew;
|
---|
[31919] | 6011 |
|
---|
| 6012 | if (pPCHSGeometry->cCylinders == 0)
|
---|
| 6013 | {
|
---|
| 6014 | /* Auto-detect marker, calculate new value ourself. */
|
---|
[32536] | 6015 | rc = pImage->Backend->pfnGetPCHSGeometry(pImage->pBackendData, &PCHSGeometryOld);
|
---|
[31919] | 6016 | if (RT_SUCCESS(rc) && (PCHSGeometryOld.cCylinders != 0))
|
---|
| 6017 | PCHSGeometryOld.cCylinders = RT_MIN(cbSize / 512 / PCHSGeometryOld.cHeads / PCHSGeometryOld.cSectors, 16383);
|
---|
| 6018 | else if (rc == VERR_VD_GEOMETRY_NOT_SET)
|
---|
| 6019 | rc = VINF_SUCCESS;
|
---|
| 6020 |
|
---|
| 6021 | pPCHSGeometryNew = &PCHSGeometryOld;
|
---|
| 6022 | }
|
---|
| 6023 | else
|
---|
| 6024 | pPCHSGeometryNew = pPCHSGeometry;
|
---|
| 6025 |
|
---|
| 6026 | if (pLCHSGeometry->cCylinders == 0)
|
---|
| 6027 | {
|
---|
| 6028 | /* Auto-detect marker, calculate new value ourself. */
|
---|
[32536] | 6029 | rc = pImage->Backend->pfnGetLCHSGeometry(pImage->pBackendData, &LCHSGeometryOld);
|
---|
[31919] | 6030 | if (RT_SUCCESS(rc) && (LCHSGeometryOld.cCylinders != 0))
|
---|
| 6031 | LCHSGeometryOld.cCylinders = cbSize / 512 / LCHSGeometryOld.cHeads / LCHSGeometryOld.cSectors;
|
---|
| 6032 | else if (rc == VERR_VD_GEOMETRY_NOT_SET)
|
---|
| 6033 | rc = VINF_SUCCESS;
|
---|
| 6034 |
|
---|
| 6035 | pLCHSGeometryNew = &LCHSGeometryOld;
|
---|
| 6036 | }
|
---|
| 6037 | else
|
---|
| 6038 | pLCHSGeometryNew = pLCHSGeometry;
|
---|
| 6039 |
|
---|
| 6040 | if (RT_SUCCESS(rc))
|
---|
[32536] | 6041 | rc = pImage->Backend->pfnResize(pImage->pBackendData,
|
---|
| 6042 | cbSize,
|
---|
[31919] | 6043 | pPCHSGeometryNew,
|
---|
| 6044 | pLCHSGeometryNew,
|
---|
| 6045 | 0, 99,
|
---|
| 6046 | pDisk->pVDIfsDisk,
|
---|
| 6047 | pImage->pVDIfsImage,
|
---|
| 6048 | pVDIfsOperation);
|
---|
[31776] | 6049 | } while (0);
|
---|
| 6050 |
|
---|
| 6051 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 6052 | {
|
---|
| 6053 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 6054 | AssertRC(rc2);
|
---|
| 6055 | }
|
---|
| 6056 | else if (RT_UNLIKELY(fLockRead))
|
---|
| 6057 | {
|
---|
| 6058 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 6059 | AssertRC(rc2);
|
---|
| 6060 | }
|
---|
| 6061 |
|
---|
| 6062 | if (RT_SUCCESS(rc))
|
---|
| 6063 | {
|
---|
| 6064 | if (pCbProgress && pCbProgress->pfnProgress)
|
---|
| 6065 | pCbProgress->pfnProgress(pIfProgress->pvUser, 100);
|
---|
| 6066 | }
|
---|
| 6067 |
|
---|
| 6068 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
| 6069 | return rc;
|
---|
| 6070 | }
|
---|
| 6071 |
|
---|
| 6072 | /**
|
---|
[6291] | 6073 | * Closes the last opened image file in HDD container.
|
---|
[27232] | 6074 | * If previous image file was opened in read-only mode (the normal case) and
|
---|
| 6075 | * the last opened image is in read-write mode then the previous image will be
|
---|
| 6076 | * reopened in read/write mode.
|
---|
[2379] | 6077 | *
|
---|
[6291] | 6078 | * @returns VBox status code.
|
---|
[15366] | 6079 | * @returns VERR_VD_NOT_OPENED if no image is opened in HDD container.
|
---|
[6291] | 6080 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 6081 | * @param fDelete If true, delete the image from the host disk.
|
---|
| 6082 | */
|
---|
| 6083 | VBOXDDU_DECL(int) VDClose(PVBOXHDD pDisk, bool fDelete)
|
---|
| 6084 | {
|
---|
[18150] | 6085 | int rc = VINF_SUCCESS;
|
---|
[27232] | 6086 | int rc2;
|
---|
| 6087 | bool fLockWrite = false;
|
---|
[2650] | 6088 |
|
---|
[7277] | 6089 | LogFlowFunc(("pDisk=%#p fDelete=%d\n", pDisk, fDelete));
|
---|
[6291] | 6090 | do
|
---|
[2650] | 6091 | {
|
---|
[6291] | 6092 | /* sanity check */
|
---|
[8569] | 6093 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6094 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
[2650] | 6095 |
|
---|
[27232] | 6096 | /* Not worth splitting this up into a read lock phase and write
|
---|
| 6097 | * lock phase, as closing an image is a relatively fast operation
|
---|
| 6098 | * dominated by the part which needs the write lock. */
|
---|
| 6099 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 6100 | AssertRC(rc2);
|
---|
| 6101 | fLockWrite = true;
|
---|
| 6102 |
|
---|
[6291] | 6103 | PVDIMAGE pImage = pDisk->pLast;
|
---|
[18150] | 6104 | if (!pImage)
|
---|
| 6105 | {
|
---|
| 6106 | rc = VERR_VD_NOT_OPENED;
|
---|
| 6107 | break;
|
---|
| 6108 | }
|
---|
[32536] | 6109 | unsigned uOpenFlags = pImage->Backend->pfnGetOpenFlags(pImage->pBackendData);
|
---|
[6291] | 6110 | /* Remove image from list of opened images. */
|
---|
| 6111 | vdRemoveImageFromList(pDisk, pImage);
|
---|
| 6112 | /* Close (and optionally delete) image. */
|
---|
[32536] | 6113 | rc = pImage->Backend->pfnClose(pImage->pBackendData, fDelete);
|
---|
[6291] | 6114 | /* Free remaining resources related to the image. */
|
---|
| 6115 | RTStrFree(pImage->pszFilename);
|
---|
| 6116 | RTMemFree(pImage);
|
---|
| 6117 |
|
---|
| 6118 | pImage = pDisk->pLast;
|
---|
| 6119 | if (!pImage)
|
---|
| 6120 | break;
|
---|
| 6121 |
|
---|
| 6122 | /* If disk was previously in read/write mode, make sure it will stay
|
---|
| 6123 | * like this (if possible) after closing this image. Set the open flags
|
---|
| 6124 | * accordingly. */
|
---|
| 6125 | if (!(uOpenFlags & VD_OPEN_FLAGS_READONLY))
|
---|
| 6126 | {
|
---|
[32536] | 6127 | uOpenFlags = pImage->Backend->pfnGetOpenFlags(pImage->pBackendData);
|
---|
[6291] | 6128 | uOpenFlags &= ~ VD_OPEN_FLAGS_READONLY;
|
---|
[32536] | 6129 | rc = pImage->Backend->pfnSetOpenFlags(pImage->pBackendData, uOpenFlags);
|
---|
[6291] | 6130 | }
|
---|
| 6131 |
|
---|
| 6132 | /* Cache disk information. */
|
---|
[32536] | 6133 | pDisk->cbSize = pImage->Backend->pfnGetSize(pImage->pBackendData);
|
---|
[6291] | 6134 |
|
---|
| 6135 | /* Cache PCHS geometry. */
|
---|
[32536] | 6136 | rc2 = pImage->Backend->pfnGetPCHSGeometry(pImage->pBackendData,
|
---|
[6291] | 6137 | &pDisk->PCHSGeometry);
|
---|
[11266] | 6138 | if (RT_FAILURE(rc2))
|
---|
[6291] | 6139 | {
|
---|
| 6140 | pDisk->PCHSGeometry.cCylinders = 0;
|
---|
| 6141 | pDisk->PCHSGeometry.cHeads = 0;
|
---|
| 6142 | pDisk->PCHSGeometry.cSectors = 0;
|
---|
| 6143 | }
|
---|
| 6144 | else
|
---|
| 6145 | {
|
---|
| 6146 | /* Make sure the PCHS geometry is properly clipped. */
|
---|
| 6147 | pDisk->PCHSGeometry.cCylinders = RT_MIN(pDisk->PCHSGeometry.cCylinders, 16383);
|
---|
| 6148 | pDisk->PCHSGeometry.cHeads = RT_MIN(pDisk->PCHSGeometry.cHeads, 16);
|
---|
| 6149 | pDisk->PCHSGeometry.cSectors = RT_MIN(pDisk->PCHSGeometry.cSectors, 63);
|
---|
| 6150 | }
|
---|
| 6151 |
|
---|
| 6152 | /* Cache LCHS geometry. */
|
---|
[32536] | 6153 | rc2 = pImage->Backend->pfnGetLCHSGeometry(pImage->pBackendData,
|
---|
[7277] | 6154 | &pDisk->LCHSGeometry);
|
---|
[11266] | 6155 | if (RT_FAILURE(rc2))
|
---|
[6291] | 6156 | {
|
---|
| 6157 | pDisk->LCHSGeometry.cCylinders = 0;
|
---|
| 6158 | pDisk->LCHSGeometry.cHeads = 0;
|
---|
| 6159 | pDisk->LCHSGeometry.cSectors = 0;
|
---|
| 6160 | }
|
---|
| 6161 | else
|
---|
| 6162 | {
|
---|
| 6163 | /* Make sure the LCHS geometry is properly clipped. */
|
---|
| 6164 | pDisk->LCHSGeometry.cHeads = RT_MIN(pDisk->LCHSGeometry.cHeads, 255);
|
---|
| 6165 | pDisk->LCHSGeometry.cSectors = RT_MIN(pDisk->LCHSGeometry.cSectors, 63);
|
---|
| 6166 | }
|
---|
| 6167 | } while (0);
|
---|
| 6168 |
|
---|
[27232] | 6169 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 6170 | {
|
---|
| 6171 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 6172 | AssertRC(rc2);
|
---|
| 6173 | }
|
---|
| 6174 |
|
---|
[11284] | 6175 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[2650] | 6176 | return rc;
|
---|
[2379] | 6177 | }
|
---|
| 6178 |
|
---|
| 6179 | /**
|
---|
[32370] | 6180 | * Closes the currently opened cache image file in HDD container.
|
---|
| 6181 | *
|
---|
| 6182 | * @return VBox status code.
|
---|
| 6183 | * @return VERR_VD_NOT_OPENED if no cache is opened in HDD container.
|
---|
| 6184 | * @param pDisk Pointer to HDD container.
|
---|
| 6185 | * @param fDelete If true, delete the image from the host disk.
|
---|
| 6186 | */
|
---|
| 6187 | VBOXDDU_DECL(int) VDCacheClose(PVBOXHDD pDisk, bool fDelete)
|
---|
| 6188 | {
|
---|
| 6189 | int rc = VINF_SUCCESS;
|
---|
| 6190 | int rc2;
|
---|
| 6191 | bool fLockWrite = false;
|
---|
| 6192 | PVDCACHE pCache = NULL;
|
---|
| 6193 |
|
---|
| 6194 | LogFlowFunc(("pDisk=%#p fDelete=%d\n", pDisk, fDelete));
|
---|
| 6195 |
|
---|
| 6196 | do
|
---|
| 6197 | {
|
---|
| 6198 | /* sanity check */
|
---|
| 6199 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
| 6200 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 6201 |
|
---|
| 6202 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 6203 | AssertRC(rc2);
|
---|
| 6204 | fLockWrite = true;
|
---|
| 6205 |
|
---|
| 6206 | AssertPtrBreakStmt(pDisk->pCache, rc = VERR_VD_CACHE_NOT_FOUND);
|
---|
| 6207 |
|
---|
| 6208 | pCache = pDisk->pCache;
|
---|
| 6209 | pDisk->pCache = NULL;
|
---|
| 6210 |
|
---|
[32536] | 6211 | pCache->Backend->pfnClose(pCache->pBackendData, fDelete);
|
---|
[32370] | 6212 | if (pCache->pszFilename)
|
---|
| 6213 | RTStrFree(pCache->pszFilename);
|
---|
| 6214 | RTMemFree(pCache);
|
---|
| 6215 | } while (0);
|
---|
| 6216 |
|
---|
| 6217 | if (RT_LIKELY(fLockWrite))
|
---|
| 6218 | {
|
---|
| 6219 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 6220 | AssertRC(rc2);
|
---|
| 6221 | }
|
---|
| 6222 |
|
---|
| 6223 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
| 6224 | return rc;
|
---|
| 6225 | }
|
---|
| 6226 |
|
---|
| 6227 | /**
|
---|
[2379] | 6228 | * Closes all opened image files in HDD container.
|
---|
| 6229 | *
|
---|
[6291] | 6230 | * @returns VBox status code.
|
---|
| 6231 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 6232 | */
|
---|
| 6233 | VBOXDDU_DECL(int) VDCloseAll(PVBOXHDD pDisk)
|
---|
| 6234 | {
|
---|
[6291] | 6235 | int rc = VINF_SUCCESS;
|
---|
[27232] | 6236 | int rc2;
|
---|
| 6237 | bool fLockWrite = false;
|
---|
[2379] | 6238 |
|
---|
[6291] | 6239 | LogFlowFunc(("pDisk=%#p\n", pDisk));
|
---|
| 6240 | do
|
---|
[2379] | 6241 | {
|
---|
[6291] | 6242 | /* sanity check */
|
---|
[8569] | 6243 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6244 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
[2379] | 6245 |
|
---|
[27232] | 6246 | /* Lock the entire operation. */
|
---|
| 6247 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 6248 | AssertRC(rc2);
|
---|
| 6249 | fLockWrite = true;
|
---|
| 6250 |
|
---|
[32370] | 6251 | PVDCACHE pCache = pDisk->pCache;
|
---|
| 6252 | if (pCache)
|
---|
| 6253 | {
|
---|
[32536] | 6254 | rc2 = pCache->Backend->pfnClose(pCache->pBackendData, false);
|
---|
[32370] | 6255 | if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
|
---|
| 6256 | rc = rc2;
|
---|
| 6257 |
|
---|
| 6258 | if (pCache->pszFilename)
|
---|
| 6259 | RTStrFree(pCache->pszFilename);
|
---|
| 6260 | RTMemFree(pCache);
|
---|
| 6261 | }
|
---|
| 6262 |
|
---|
[6291] | 6263 | PVDIMAGE pImage = pDisk->pLast;
|
---|
[7199] | 6264 | while (VALID_PTR(pImage))
|
---|
[6291] | 6265 | {
|
---|
| 6266 | PVDIMAGE pPrev = pImage->pPrev;
|
---|
| 6267 | /* Remove image from list of opened images. */
|
---|
| 6268 | vdRemoveImageFromList(pDisk, pImage);
|
---|
| 6269 | /* Close image. */
|
---|
[32536] | 6270 | rc2 = pImage->Backend->pfnClose(pImage->pBackendData, false);
|
---|
[11266] | 6271 | if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
|
---|
[6291] | 6272 | rc = rc2;
|
---|
| 6273 | /* Free remaining resources related to the image. */
|
---|
| 6274 | RTStrFree(pImage->pszFilename);
|
---|
| 6275 | RTMemFree(pImage);
|
---|
| 6276 | pImage = pPrev;
|
---|
| 6277 | }
|
---|
[7199] | 6278 | Assert(!VALID_PTR(pDisk->pLast));
|
---|
[6291] | 6279 | } while (0);
|
---|
| 6280 |
|
---|
[27232] | 6281 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 6282 | {
|
---|
| 6283 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 6284 | AssertRC(rc2);
|
---|
| 6285 | }
|
---|
| 6286 |
|
---|
[11284] | 6287 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[2379] | 6288 | return rc;
|
---|
| 6289 | }
|
---|
| 6290 |
|
---|
| 6291 | /**
|
---|
| 6292 | * Read data from virtual HDD.
|
---|
| 6293 | *
|
---|
| 6294 | * @returns VBox status code.
|
---|
[15366] | 6295 | * @returns VERR_VD_NOT_OPENED if no image is opened in HDD container.
|
---|
[6291] | 6296 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 6297 | * @param uOffset Offset of first reading byte from start of disk.
|
---|
| 6298 | * @param pvBuf Pointer to buffer for reading data.
|
---|
| 6299 | * @param cbRead Number of bytes to read.
|
---|
| 6300 | */
|
---|
[6291] | 6301 | VBOXDDU_DECL(int) VDRead(PVBOXHDD pDisk, uint64_t uOffset, void *pvBuf,
|
---|
| 6302 | size_t cbRead)
|
---|
[2379] | 6303 | {
|
---|
[27232] | 6304 | int rc = VINF_SUCCESS;
|
---|
| 6305 | int rc2;
|
---|
| 6306 | bool fLockRead = false;
|
---|
[2379] | 6307 |
|
---|
[6326] | 6308 | LogFlowFunc(("pDisk=%#p uOffset=%llu pvBuf=%p cbRead=%zu\n",
|
---|
| 6309 | pDisk, uOffset, pvBuf, cbRead));
|
---|
[6291] | 6310 | do
|
---|
[2379] | 6311 | {
|
---|
[6291] | 6312 | /* sanity check */
|
---|
[8569] | 6313 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6314 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
[2379] | 6315 |
|
---|
[6291] | 6316 | /* Check arguments. */
|
---|
[8565] | 6317 | AssertMsgBreakStmt(VALID_PTR(pvBuf),
|
---|
| 6318 | ("pvBuf=%#p\n", pvBuf),
|
---|
| 6319 | rc = VERR_INVALID_PARAMETER);
|
---|
| 6320 | AssertMsgBreakStmt(cbRead,
|
---|
| 6321 | ("cbRead=%zu\n", cbRead),
|
---|
| 6322 | rc = VERR_INVALID_PARAMETER);
|
---|
[27232] | 6323 |
|
---|
| 6324 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 6325 | AssertRC(rc2);
|
---|
| 6326 | fLockRead = true;
|
---|
| 6327 |
|
---|
[8565] | 6328 | AssertMsgBreakStmt(uOffset + cbRead <= pDisk->cbSize,
|
---|
| 6329 | ("uOffset=%llu cbRead=%zu pDisk->cbSize=%llu\n",
|
---|
| 6330 | uOffset, cbRead, pDisk->cbSize),
|
---|
| 6331 | rc = VERR_INVALID_PARAMETER);
|
---|
[2379] | 6332 |
|
---|
[6291] | 6333 | PVDIMAGE pImage = pDisk->pLast;
|
---|
[15366] | 6334 | AssertPtrBreakStmt(pImage, rc = VERR_VD_NOT_OPENED);
|
---|
[6291] | 6335 |
|
---|
[32370] | 6336 | rc = vdReadHelper(pDisk, pImage, NULL, uOffset, pvBuf, cbRead,
|
---|
| 6337 | true /* fZeroFreeBlocks */,
|
---|
| 6338 | true /* fUpdateCache */);
|
---|
[6291] | 6339 | } while (0);
|
---|
| 6340 |
|
---|
[27232] | 6341 | if (RT_UNLIKELY(fLockRead))
|
---|
| 6342 | {
|
---|
| 6343 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 6344 | AssertRC(rc2);
|
---|
| 6345 | }
|
---|
| 6346 |
|
---|
[11284] | 6347 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[2379] | 6348 | return rc;
|
---|
| 6349 | }
|
---|
| 6350 |
|
---|
| 6351 | /**
|
---|
| 6352 | * Write data to virtual HDD.
|
---|
| 6353 | *
|
---|
| 6354 | * @returns VBox status code.
|
---|
[15366] | 6355 | * @returns VERR_VD_NOT_OPENED if no image is opened in HDD container.
|
---|
[6291] | 6356 | * @param pDisk Pointer to HDD container.
|
---|
[11266] | 6357 | * @param uOffset Offset of the first byte being
|
---|
[9262] | 6358 | * written from start of disk.
|
---|
[2379] | 6359 | * @param pvBuf Pointer to buffer for writing data.
|
---|
| 6360 | * @param cbWrite Number of bytes to write.
|
---|
| 6361 | */
|
---|
[6325] | 6362 | VBOXDDU_DECL(int) VDWrite(PVBOXHDD pDisk, uint64_t uOffset, const void *pvBuf,
|
---|
| 6363 | size_t cbWrite)
|
---|
[2379] | 6364 | {
|
---|
| 6365 | int rc = VINF_SUCCESS;
|
---|
[27232] | 6366 | int rc2;
|
---|
| 6367 | bool fLockWrite = false;
|
---|
[2379] | 6368 |
|
---|
[6326] | 6369 | LogFlowFunc(("pDisk=%#p uOffset=%llu pvBuf=%p cbWrite=%zu\n",
|
---|
| 6370 | pDisk, uOffset, pvBuf, cbWrite));
|
---|
[6291] | 6371 | do
|
---|
[2379] | 6372 | {
|
---|
[6291] | 6373 | /* sanity check */
|
---|
[8569] | 6374 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6375 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
[2379] | 6376 |
|
---|
[6291] | 6377 | /* Check arguments. */
|
---|
[8565] | 6378 | AssertMsgBreakStmt(VALID_PTR(pvBuf),
|
---|
| 6379 | ("pvBuf=%#p\n", pvBuf),
|
---|
| 6380 | rc = VERR_INVALID_PARAMETER);
|
---|
| 6381 | AssertMsgBreakStmt(cbWrite,
|
---|
| 6382 | ("cbWrite=%zu\n", cbWrite),
|
---|
| 6383 | rc = VERR_INVALID_PARAMETER);
|
---|
[27232] | 6384 |
|
---|
| 6385 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 6386 | AssertRC(rc2);
|
---|
| 6387 | fLockWrite = true;
|
---|
| 6388 |
|
---|
[8565] | 6389 | AssertMsgBreakStmt(uOffset + cbWrite <= pDisk->cbSize,
|
---|
| 6390 | ("uOffset=%llu cbWrite=%zu pDisk->cbSize=%llu\n",
|
---|
| 6391 | uOffset, cbWrite, pDisk->cbSize),
|
---|
| 6392 | rc = VERR_INVALID_PARAMETER);
|
---|
[2379] | 6393 |
|
---|
[6291] | 6394 | PVDIMAGE pImage = pDisk->pLast;
|
---|
[15366] | 6395 | AssertPtrBreakStmt(pImage, rc = VERR_VD_NOT_OPENED);
|
---|
[2379] | 6396 |
|
---|
[6291] | 6397 | vdSetModifiedFlag(pDisk);
|
---|
[32370] | 6398 | rc = vdWriteHelper(pDisk, pImage, NULL, uOffset, pvBuf, cbWrite,
|
---|
| 6399 | true /* fUpdateCache */);
|
---|
[6291] | 6400 | } while (0);
|
---|
[2379] | 6401 |
|
---|
[27232] | 6402 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 6403 | {
|
---|
| 6404 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 6405 | AssertRC(rc2);
|
---|
| 6406 | }
|
---|
| 6407 |
|
---|
[11284] | 6408 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[2379] | 6409 | return rc;
|
---|
| 6410 | }
|
---|
| 6411 |
|
---|
| 6412 | /**
|
---|
| 6413 | * Make sure the on disk representation of a virtual HDD is up to date.
|
---|
| 6414 | *
|
---|
| 6415 | * @returns VBox status code.
|
---|
[15366] | 6416 | * @returns VERR_VD_NOT_OPENED if no image is opened in HDD container.
|
---|
[6291] | 6417 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 6418 | */
|
---|
| 6419 | VBOXDDU_DECL(int) VDFlush(PVBOXHDD pDisk)
|
---|
| 6420 | {
|
---|
[6291] | 6421 | int rc = VINF_SUCCESS;
|
---|
[27232] | 6422 | int rc2;
|
---|
| 6423 | bool fLockWrite = false;
|
---|
[2379] | 6424 |
|
---|
[6291] | 6425 | LogFlowFunc(("pDisk=%#p\n", pDisk));
|
---|
| 6426 | do
|
---|
[2379] | 6427 | {
|
---|
[6291] | 6428 | /* sanity check */
|
---|
[8569] | 6429 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6430 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 6431 |
|
---|
[27232] | 6432 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 6433 | AssertRC(rc2);
|
---|
| 6434 | fLockWrite = true;
|
---|
| 6435 |
|
---|
[6291] | 6436 | PVDIMAGE pImage = pDisk->pLast;
|
---|
[15366] | 6437 | AssertPtrBreakStmt(pImage, rc = VERR_VD_NOT_OPENED);
|
---|
[6291] | 6438 |
|
---|
[2379] | 6439 | vdResetModifiedFlag(pDisk);
|
---|
[32536] | 6440 | rc = pImage->Backend->pfnFlush(pImage->pBackendData);
|
---|
[32370] | 6441 |
|
---|
| 6442 | if ( RT_SUCCESS(rc)
|
---|
| 6443 | && pDisk->pCache)
|
---|
[32536] | 6444 | rc = pDisk->pCache->Backend->pfnFlush(pDisk->pCache->pBackendData);
|
---|
[6291] | 6445 | } while (0);
|
---|
[2379] | 6446 |
|
---|
[27232] | 6447 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 6448 | {
|
---|
| 6449 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 6450 | AssertRC(rc2);
|
---|
| 6451 | }
|
---|
| 6452 |
|
---|
[11284] | 6453 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[2379] | 6454 | return rc;
|
---|
| 6455 | }
|
---|
| 6456 |
|
---|
| 6457 | /**
|
---|
| 6458 | * Get number of opened images in HDD container.
|
---|
| 6459 | *
|
---|
| 6460 | * @returns Number of opened images for HDD container. 0 if no images have been opened.
|
---|
[6291] | 6461 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 6462 | */
|
---|
| 6463 | VBOXDDU_DECL(unsigned) VDGetCount(PVBOXHDD pDisk)
|
---|
| 6464 | {
|
---|
[6291] | 6465 | unsigned cImages;
|
---|
[27232] | 6466 | int rc2;
|
---|
| 6467 | bool fLockRead = false;
|
---|
[2379] | 6468 |
|
---|
[6291] | 6469 | LogFlowFunc(("pDisk=%#p\n", pDisk));
|
---|
| 6470 | do
|
---|
| 6471 | {
|
---|
| 6472 | /* sanity check */
|
---|
[8569] | 6473 | AssertPtrBreakStmt(pDisk, cImages = 0);
|
---|
[6291] | 6474 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 6475 |
|
---|
[27232] | 6476 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 6477 | AssertRC(rc2);
|
---|
| 6478 | fLockRead = true;
|
---|
| 6479 |
|
---|
[6291] | 6480 | cImages = pDisk->cImages;
|
---|
| 6481 | } while (0);
|
---|
| 6482 |
|
---|
[27232] | 6483 | if (RT_UNLIKELY(fLockRead))
|
---|
| 6484 | {
|
---|
| 6485 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 6486 | AssertRC(rc2);
|
---|
| 6487 | }
|
---|
| 6488 |
|
---|
[6291] | 6489 | LogFlowFunc(("returns %u\n", cImages));
|
---|
| 6490 | return cImages;
|
---|
[2379] | 6491 | }
|
---|
| 6492 |
|
---|
| 6493 | /**
|
---|
[6291] | 6494 | * Get read/write mode of HDD container.
|
---|
[2379] | 6495 | *
|
---|
| 6496 | * @returns Virtual disk ReadOnly status.
|
---|
| 6497 | * @returns true if no image is opened in HDD container.
|
---|
[6291] | 6498 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 6499 | */
|
---|
| 6500 | VBOXDDU_DECL(bool) VDIsReadOnly(PVBOXHDD pDisk)
|
---|
| 6501 | {
|
---|
[6291] | 6502 | bool fReadOnly;
|
---|
[27232] | 6503 | int rc2;
|
---|
| 6504 | bool fLockRead = false;
|
---|
[2379] | 6505 |
|
---|
[6291] | 6506 | LogFlowFunc(("pDisk=%#p\n", pDisk));
|
---|
| 6507 | do
|
---|
[2379] | 6508 | {
|
---|
[6291] | 6509 | /* sanity check */
|
---|
[8569] | 6510 | AssertPtrBreakStmt(pDisk, fReadOnly = false);
|
---|
[6291] | 6511 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 6512 |
|
---|
[27232] | 6513 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 6514 | AssertRC(rc2);
|
---|
| 6515 | fLockRead = true;
|
---|
| 6516 |
|
---|
[6291] | 6517 | PVDIMAGE pImage = pDisk->pLast;
|
---|
[8569] | 6518 | AssertPtrBreakStmt(pImage, fReadOnly = true);
|
---|
[6291] | 6519 |
|
---|
[2379] | 6520 | unsigned uOpenFlags;
|
---|
[32536] | 6521 | uOpenFlags = pDisk->pLast->Backend->pfnGetOpenFlags(pDisk->pLast->pBackendData);
|
---|
[6291] | 6522 | fReadOnly = !!(uOpenFlags & VD_OPEN_FLAGS_READONLY);
|
---|
| 6523 | } while (0);
|
---|
| 6524 |
|
---|
[27232] | 6525 | if (RT_UNLIKELY(fLockRead))
|
---|
| 6526 | {
|
---|
| 6527 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 6528 | AssertRC(rc2);
|
---|
| 6529 | }
|
---|
| 6530 |
|
---|
[6291] | 6531 | LogFlowFunc(("returns %d\n", fReadOnly));
|
---|
| 6532 | return fReadOnly;
|
---|
| 6533 | }
|
---|
| 6534 |
|
---|
| 6535 | /**
|
---|
| 6536 | * Get total capacity of an image in HDD container.
|
---|
| 6537 | *
|
---|
| 6538 | * @returns Virtual disk size in bytes.
|
---|
| 6539 | * @returns 0 if no image with specified number was not opened.
|
---|
| 6540 | * @param pDisk Pointer to HDD container.
|
---|
| 6541 | * @param nImage Image number, counds from 0. 0 is always base image of container.
|
---|
| 6542 | */
|
---|
| 6543 | VBOXDDU_DECL(uint64_t) VDGetSize(PVBOXHDD pDisk, unsigned nImage)
|
---|
| 6544 | {
|
---|
| 6545 | uint64_t cbSize;
|
---|
[27232] | 6546 | int rc2;
|
---|
| 6547 | bool fLockRead = false;
|
---|
[6291] | 6548 |
|
---|
| 6549 | LogFlowFunc(("pDisk=%#p nImage=%u\n", pDisk, nImage));
|
---|
| 6550 | do
|
---|
[2379] | 6551 | {
|
---|
[6291] | 6552 | /* sanity check */
|
---|
[8569] | 6553 | AssertPtrBreakStmt(pDisk, cbSize = 0);
|
---|
[6291] | 6554 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
[2379] | 6555 |
|
---|
[27232] | 6556 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 6557 | AssertRC(rc2);
|
---|
| 6558 | fLockRead = true;
|
---|
| 6559 |
|
---|
[6291] | 6560 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[8569] | 6561 | AssertPtrBreakStmt(pImage, cbSize = 0);
|
---|
[32536] | 6562 | cbSize = pImage->Backend->pfnGetSize(pImage->pBackendData);
|
---|
[6291] | 6563 | } while (0);
|
---|
| 6564 |
|
---|
[27232] | 6565 | if (RT_UNLIKELY(fLockRead))
|
---|
| 6566 | {
|
---|
| 6567 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 6568 | AssertRC(rc2);
|
---|
| 6569 | }
|
---|
| 6570 |
|
---|
[6291] | 6571 | LogFlowFunc(("returns %llu\n", cbSize));
|
---|
| 6572 | return cbSize;
|
---|
[2379] | 6573 | }
|
---|
| 6574 |
|
---|
| 6575 | /**
|
---|
[6291] | 6576 | * Get total file size of an image in HDD container.
|
---|
[2379] | 6577 | *
|
---|
| 6578 | * @returns Virtual disk size in bytes.
|
---|
| 6579 | * @returns 0 if no image is opened in HDD container.
|
---|
[6291] | 6580 | * @param pDisk Pointer to HDD container.
|
---|
| 6581 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
[2379] | 6582 | */
|
---|
[6291] | 6583 | VBOXDDU_DECL(uint64_t) VDGetFileSize(PVBOXHDD pDisk, unsigned nImage)
|
---|
[2379] | 6584 | {
|
---|
[6291] | 6585 | uint64_t cbSize;
|
---|
[27232] | 6586 | int rc2;
|
---|
| 6587 | bool fLockRead = false;
|
---|
[2379] | 6588 |
|
---|
[6291] | 6589 | LogFlowFunc(("pDisk=%#p nImage=%u\n", pDisk, nImage));
|
---|
| 6590 | do
|
---|
| 6591 | {
|
---|
| 6592 | /* sanity check */
|
---|
[8569] | 6593 | AssertPtrBreakStmt(pDisk, cbSize = 0);
|
---|
[6291] | 6594 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 6595 |
|
---|
[27232] | 6596 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 6597 | AssertRC(rc2);
|
---|
| 6598 | fLockRead = true;
|
---|
| 6599 |
|
---|
[6291] | 6600 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[8569] | 6601 | AssertPtrBreakStmt(pImage, cbSize = 0);
|
---|
[32536] | 6602 | cbSize = pImage->Backend->pfnGetFileSize(pImage->pBackendData);
|
---|
[6291] | 6603 | } while (0);
|
---|
| 6604 |
|
---|
[27232] | 6605 | if (RT_UNLIKELY(fLockRead))
|
---|
| 6606 | {
|
---|
| 6607 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 6608 | AssertRC(rc2);
|
---|
| 6609 | }
|
---|
| 6610 |
|
---|
[6291] | 6611 | LogFlowFunc(("returns %llu\n", cbSize));
|
---|
| 6612 | return cbSize;
|
---|
[2379] | 6613 | }
|
---|
| 6614 |
|
---|
| 6615 | /**
|
---|
[6291] | 6616 | * Get virtual disk PCHS geometry stored in HDD container.
|
---|
[2379] | 6617 | *
|
---|
| 6618 | * @returns VBox status code.
|
---|
[15366] | 6619 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
| 6620 | * @returns VERR_VD_GEOMETRY_NOT_SET if no geometry present in the HDD container.
|
---|
[6291] | 6621 | * @param pDisk Pointer to HDD container.
|
---|
| 6622 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 6623 | * @param pPCHSGeometry Where to store PCHS geometry. Not NULL.
|
---|
[2379] | 6624 | */
|
---|
[6291] | 6625 | VBOXDDU_DECL(int) VDGetPCHSGeometry(PVBOXHDD pDisk, unsigned nImage,
|
---|
[32536] | 6626 | PVDGEOMETRY pPCHSGeometry)
|
---|
[2379] | 6627 | {
|
---|
[6291] | 6628 | int rc = VINF_SUCCESS;
|
---|
[27232] | 6629 | int rc2;
|
---|
| 6630 | bool fLockRead = false;
|
---|
[2379] | 6631 |
|
---|
[6291] | 6632 | LogFlowFunc(("pDisk=%#p nImage=%u pPCHSGeometry=%#p\n",
|
---|
| 6633 | pDisk, nImage, pPCHSGeometry));
|
---|
| 6634 | do
|
---|
[2379] | 6635 | {
|
---|
[6291] | 6636 | /* sanity check */
|
---|
[8569] | 6637 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6638 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 6639 |
|
---|
| 6640 | /* Check arguments. */
|
---|
[8565] | 6641 | AssertMsgBreakStmt(VALID_PTR(pPCHSGeometry),
|
---|
| 6642 | ("pPCHSGeometry=%#p\n", pPCHSGeometry),
|
---|
| 6643 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6644 |
|
---|
[27232] | 6645 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 6646 | AssertRC(rc2);
|
---|
| 6647 | fLockRead = true;
|
---|
| 6648 |
|
---|
[6291] | 6649 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 6650 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 6651 |
|
---|
| 6652 | if (pImage == pDisk->pLast)
|
---|
[2379] | 6653 | {
|
---|
[6291] | 6654 | /* Use cached information if possible. */
|
---|
| 6655 | if (pDisk->PCHSGeometry.cCylinders != 0)
|
---|
| 6656 | *pPCHSGeometry = pDisk->PCHSGeometry;
|
---|
| 6657 | else
|
---|
[15366] | 6658 | rc = VERR_VD_GEOMETRY_NOT_SET;
|
---|
[2379] | 6659 | }
|
---|
| 6660 | else
|
---|
[32536] | 6661 | rc = pImage->Backend->pfnGetPCHSGeometry(pImage->pBackendData,
|
---|
[7277] | 6662 | pPCHSGeometry);
|
---|
[6291] | 6663 | } while (0);
|
---|
| 6664 |
|
---|
[27232] | 6665 | if (RT_UNLIKELY(fLockRead))
|
---|
| 6666 | {
|
---|
| 6667 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 6668 | AssertRC(rc2);
|
---|
| 6669 | }
|
---|
| 6670 |
|
---|
[32536] | 6671 | LogFlowFunc(("%Rrc (PCHS=%u/%u/%u)\n", rc,
|
---|
[6291] | 6672 | pDisk->PCHSGeometry.cCylinders, pDisk->PCHSGeometry.cHeads,
|
---|
| 6673 | pDisk->PCHSGeometry.cSectors));
|
---|
[2379] | 6674 | return rc;
|
---|
| 6675 | }
|
---|
| 6676 |
|
---|
| 6677 | /**
|
---|
[6291] | 6678 | * Store virtual disk PCHS geometry in HDD container.
|
---|
[2379] | 6679 | *
|
---|
| 6680 | * Note that in case of unrecoverable error all images in HDD container will be closed.
|
---|
| 6681 | *
|
---|
| 6682 | * @returns VBox status code.
|
---|
[15366] | 6683 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
| 6684 | * @returns VERR_VD_GEOMETRY_NOT_SET if no geometry present in the HDD container.
|
---|
[6291] | 6685 | * @param pDisk Pointer to HDD container.
|
---|
| 6686 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 6687 | * @param pPCHSGeometry Where to load PCHS geometry from. Not NULL.
|
---|
[2379] | 6688 | */
|
---|
[6291] | 6689 | VBOXDDU_DECL(int) VDSetPCHSGeometry(PVBOXHDD pDisk, unsigned nImage,
|
---|
[32536] | 6690 | PCVDGEOMETRY pPCHSGeometry)
|
---|
[2379] | 6691 | {
|
---|
[6291] | 6692 | int rc = VINF_SUCCESS;
|
---|
[27232] | 6693 | int rc2;
|
---|
| 6694 | bool fLockWrite = false;
|
---|
[2379] | 6695 |
|
---|
[6291] | 6696 | LogFlowFunc(("pDisk=%#p nImage=%u pPCHSGeometry=%#p PCHS=%u/%u/%u\n",
|
---|
| 6697 | pDisk, nImage, pPCHSGeometry, pPCHSGeometry->cCylinders,
|
---|
| 6698 | pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
|
---|
| 6699 | do
|
---|
[2379] | 6700 | {
|
---|
[6291] | 6701 | /* sanity check */
|
---|
[8569] | 6702 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6703 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 6704 |
|
---|
| 6705 | /* Check arguments. */
|
---|
[8565] | 6706 | AssertMsgBreakStmt( VALID_PTR(pPCHSGeometry)
|
---|
| 6707 | && pPCHSGeometry->cHeads <= 16
|
---|
| 6708 | && pPCHSGeometry->cSectors <= 63,
|
---|
| 6709 | ("pPCHSGeometry=%#p PCHS=%u/%u/%u\n", pPCHSGeometry,
|
---|
| 6710 | pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads,
|
---|
| 6711 | pPCHSGeometry->cSectors),
|
---|
| 6712 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6713 |
|
---|
[27232] | 6714 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 6715 | AssertRC(rc2);
|
---|
| 6716 | fLockWrite = true;
|
---|
| 6717 |
|
---|
[6291] | 6718 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 6719 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 6720 |
|
---|
| 6721 | if (pImage == pDisk->pLast)
|
---|
[2379] | 6722 | {
|
---|
[6291] | 6723 | if ( pPCHSGeometry->cCylinders != pDisk->PCHSGeometry.cCylinders
|
---|
| 6724 | || pPCHSGeometry->cHeads != pDisk->PCHSGeometry.cHeads
|
---|
| 6725 | || pPCHSGeometry->cSectors != pDisk->PCHSGeometry.cSectors)
|
---|
| 6726 | {
|
---|
| 6727 | /* Only update geometry if it is changed. Avoids similar checks
|
---|
| 6728 | * in every backend. Most of the time the new geometry is set
|
---|
| 6729 | * to the previous values, so no need to go through the hassle
|
---|
| 6730 | * of updating an image which could be opened in read-only mode
|
---|
| 6731 | * right now. */
|
---|
[32536] | 6732 | rc = pImage->Backend->pfnSetPCHSGeometry(pImage->pBackendData,
|
---|
[7277] | 6733 | pPCHSGeometry);
|
---|
[2379] | 6734 |
|
---|
[6291] | 6735 | /* Cache new geometry values in any case. */
|
---|
[32536] | 6736 | rc2 = pImage->Backend->pfnGetPCHSGeometry(pImage->pBackendData,
|
---|
[27367] | 6737 | &pDisk->PCHSGeometry);
|
---|
[11266] | 6738 | if (RT_FAILURE(rc2))
|
---|
[6291] | 6739 | {
|
---|
| 6740 | pDisk->PCHSGeometry.cCylinders = 0;
|
---|
| 6741 | pDisk->PCHSGeometry.cHeads = 0;
|
---|
| 6742 | pDisk->PCHSGeometry.cSectors = 0;
|
---|
| 6743 | }
|
---|
| 6744 | else
|
---|
| 6745 | {
|
---|
| 6746 | /* Make sure the CHS geometry is properly clipped. */
|
---|
| 6747 | pDisk->PCHSGeometry.cHeads = RT_MIN(pDisk->PCHSGeometry.cHeads, 255);
|
---|
| 6748 | pDisk->PCHSGeometry.cSectors = RT_MIN(pDisk->PCHSGeometry.cSectors, 63);
|
---|
| 6749 | }
|
---|
[2379] | 6750 | }
|
---|
[6291] | 6751 | }
|
---|
| 6752 | else
|
---|
| 6753 | {
|
---|
[32536] | 6754 | VDGEOMETRY PCHS;
|
---|
| 6755 | rc = pImage->Backend->pfnGetPCHSGeometry(pImage->pBackendData,
|
---|
[7277] | 6756 | &PCHS);
|
---|
[11266] | 6757 | if ( RT_FAILURE(rc)
|
---|
[6291] | 6758 | || pPCHSGeometry->cCylinders != PCHS.cCylinders
|
---|
| 6759 | || pPCHSGeometry->cHeads != PCHS.cHeads
|
---|
| 6760 | || pPCHSGeometry->cSectors != PCHS.cSectors)
|
---|
[2379] | 6761 | {
|
---|
[6291] | 6762 | /* Only update geometry if it is changed. Avoids similar checks
|
---|
| 6763 | * in every backend. Most of the time the new geometry is set
|
---|
| 6764 | * to the previous values, so no need to go through the hassle
|
---|
| 6765 | * of updating an image which could be opened in read-only mode
|
---|
| 6766 | * right now. */
|
---|
[32536] | 6767 | rc = pImage->Backend->pfnSetPCHSGeometry(pImage->pBackendData,
|
---|
[7277] | 6768 | pPCHSGeometry);
|
---|
[2379] | 6769 | }
|
---|
| 6770 | }
|
---|
[6291] | 6771 | } while (0);
|
---|
[2379] | 6772 |
|
---|
[27232] | 6773 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 6774 | {
|
---|
| 6775 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 6776 | AssertRC(rc2);
|
---|
| 6777 | }
|
---|
| 6778 |
|
---|
[11284] | 6779 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[2379] | 6780 | return rc;
|
---|
| 6781 | }
|
---|
| 6782 |
|
---|
| 6783 | /**
|
---|
[6291] | 6784 | * Get virtual disk LCHS geometry stored in HDD container.
|
---|
[2379] | 6785 | *
|
---|
| 6786 | * @returns VBox status code.
|
---|
[15366] | 6787 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
| 6788 | * @returns VERR_VD_GEOMETRY_NOT_SET if no geometry present in the HDD container.
|
---|
[6291] | 6789 | * @param pDisk Pointer to HDD container.
|
---|
| 6790 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 6791 | * @param pLCHSGeometry Where to store LCHS geometry. Not NULL.
|
---|
[2379] | 6792 | */
|
---|
[6291] | 6793 | VBOXDDU_DECL(int) VDGetLCHSGeometry(PVBOXHDD pDisk, unsigned nImage,
|
---|
[32536] | 6794 | PVDGEOMETRY pLCHSGeometry)
|
---|
[2379] | 6795 | {
|
---|
[6291] | 6796 | int rc = VINF_SUCCESS;
|
---|
[27232] | 6797 | int rc2;
|
---|
| 6798 | bool fLockRead = false;
|
---|
[2379] | 6799 |
|
---|
[6291] | 6800 | LogFlowFunc(("pDisk=%#p nImage=%u pLCHSGeometry=%#p\n",
|
---|
| 6801 | pDisk, nImage, pLCHSGeometry));
|
---|
| 6802 | do
|
---|
[2379] | 6803 | {
|
---|
[6291] | 6804 | /* sanity check */
|
---|
[8569] | 6805 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6806 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 6807 |
|
---|
| 6808 | /* Check arguments. */
|
---|
[8565] | 6809 | AssertMsgBreakStmt(VALID_PTR(pLCHSGeometry),
|
---|
| 6810 | ("pLCHSGeometry=%#p\n", pLCHSGeometry),
|
---|
| 6811 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6812 |
|
---|
[27232] | 6813 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 6814 | AssertRC(rc2);
|
---|
| 6815 | fLockRead = true;
|
---|
| 6816 |
|
---|
[6291] | 6817 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 6818 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 6819 |
|
---|
| 6820 | if (pImage == pDisk->pLast)
|
---|
| 6821 | {
|
---|
| 6822 | /* Use cached information if possible. */
|
---|
| 6823 | if (pDisk->LCHSGeometry.cCylinders != 0)
|
---|
| 6824 | *pLCHSGeometry = pDisk->LCHSGeometry;
|
---|
| 6825 | else
|
---|
[15366] | 6826 | rc = VERR_VD_GEOMETRY_NOT_SET;
|
---|
[6291] | 6827 | }
|
---|
[2379] | 6828 | else
|
---|
[32536] | 6829 | rc = pImage->Backend->pfnGetLCHSGeometry(pImage->pBackendData,
|
---|
[7277] | 6830 | pLCHSGeometry);
|
---|
[6291] | 6831 | } while (0);
|
---|
| 6832 |
|
---|
[27232] | 6833 | if (RT_UNLIKELY(fLockRead))
|
---|
| 6834 | {
|
---|
| 6835 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 6836 | AssertRC(rc2);
|
---|
| 6837 | }
|
---|
| 6838 |
|
---|
[11284] | 6839 | LogFlowFunc((": %Rrc (LCHS=%u/%u/%u)\n", rc,
|
---|
[6291] | 6840 | pDisk->LCHSGeometry.cCylinders, pDisk->LCHSGeometry.cHeads,
|
---|
| 6841 | pDisk->LCHSGeometry.cSectors));
|
---|
[2379] | 6842 | return rc;
|
---|
| 6843 | }
|
---|
| 6844 |
|
---|
| 6845 | /**
|
---|
[6291] | 6846 | * Store virtual disk LCHS geometry in HDD container.
|
---|
[2379] | 6847 | *
|
---|
| 6848 | * Note that in case of unrecoverable error all images in HDD container will be closed.
|
---|
| 6849 | *
|
---|
| 6850 | * @returns VBox status code.
|
---|
[15366] | 6851 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
| 6852 | * @returns VERR_VD_GEOMETRY_NOT_SET if no geometry present in the HDD container.
|
---|
[6291] | 6853 | * @param pDisk Pointer to HDD container.
|
---|
| 6854 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 6855 | * @param pLCHSGeometry Where to load LCHS geometry from. Not NULL.
|
---|
[2379] | 6856 | */
|
---|
[6291] | 6857 | VBOXDDU_DECL(int) VDSetLCHSGeometry(PVBOXHDD pDisk, unsigned nImage,
|
---|
[32536] | 6858 | PCVDGEOMETRY pLCHSGeometry)
|
---|
[2379] | 6859 | {
|
---|
[6291] | 6860 | int rc = VINF_SUCCESS;
|
---|
[27232] | 6861 | int rc2;
|
---|
| 6862 | bool fLockWrite = false;
|
---|
[2379] | 6863 |
|
---|
[6291] | 6864 | LogFlowFunc(("pDisk=%#p nImage=%u pLCHSGeometry=%#p LCHS=%u/%u/%u\n",
|
---|
| 6865 | pDisk, nImage, pLCHSGeometry, pLCHSGeometry->cCylinders,
|
---|
| 6866 | pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
|
---|
| 6867 | do
|
---|
[2379] | 6868 | {
|
---|
[6291] | 6869 | /* sanity check */
|
---|
[8569] | 6870 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6871 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 6872 |
|
---|
| 6873 | /* Check arguments. */
|
---|
[8565] | 6874 | AssertMsgBreakStmt( VALID_PTR(pLCHSGeometry)
|
---|
| 6875 | && pLCHSGeometry->cHeads <= 255
|
---|
| 6876 | && pLCHSGeometry->cSectors <= 63,
|
---|
| 6877 | ("pLCHSGeometry=%#p LCHS=%u/%u/%u\n", pLCHSGeometry,
|
---|
| 6878 | pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads,
|
---|
| 6879 | pLCHSGeometry->cSectors),
|
---|
| 6880 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6881 |
|
---|
[27232] | 6882 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 6883 | AssertRC(rc2);
|
---|
| 6884 | fLockWrite = true;
|
---|
| 6885 |
|
---|
[6291] | 6886 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 6887 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 6888 |
|
---|
| 6889 | if (pImage == pDisk->pLast)
|
---|
[2379] | 6890 | {
|
---|
[6291] | 6891 | if ( pLCHSGeometry->cCylinders != pDisk->LCHSGeometry.cCylinders
|
---|
| 6892 | || pLCHSGeometry->cHeads != pDisk->LCHSGeometry.cHeads
|
---|
| 6893 | || pLCHSGeometry->cSectors != pDisk->LCHSGeometry.cSectors)
|
---|
| 6894 | {
|
---|
| 6895 | /* Only update geometry if it is changed. Avoids similar checks
|
---|
| 6896 | * in every backend. Most of the time the new geometry is set
|
---|
| 6897 | * to the previous values, so no need to go through the hassle
|
---|
| 6898 | * of updating an image which could be opened in read-only mode
|
---|
| 6899 | * right now. */
|
---|
[32536] | 6900 | rc = pImage->Backend->pfnSetLCHSGeometry(pImage->pBackendData,
|
---|
[7277] | 6901 | pLCHSGeometry);
|
---|
[2379] | 6902 |
|
---|
[6291] | 6903 | /* Cache new geometry values in any case. */
|
---|
[32536] | 6904 | rc2 = pImage->Backend->pfnGetLCHSGeometry(pImage->pBackendData,
|
---|
[27367] | 6905 | &pDisk->LCHSGeometry);
|
---|
[11266] | 6906 | if (RT_FAILURE(rc2))
|
---|
[6291] | 6907 | {
|
---|
| 6908 | pDisk->LCHSGeometry.cCylinders = 0;
|
---|
| 6909 | pDisk->LCHSGeometry.cHeads = 0;
|
---|
| 6910 | pDisk->LCHSGeometry.cSectors = 0;
|
---|
| 6911 | }
|
---|
| 6912 | else
|
---|
| 6913 | {
|
---|
| 6914 | /* Make sure the CHS geometry is properly clipped. */
|
---|
| 6915 | pDisk->LCHSGeometry.cHeads = RT_MIN(pDisk->LCHSGeometry.cHeads, 255);
|
---|
| 6916 | pDisk->LCHSGeometry.cSectors = RT_MIN(pDisk->LCHSGeometry.cSectors, 63);
|
---|
| 6917 | }
|
---|
| 6918 | }
|
---|
[2379] | 6919 | }
|
---|
[6291] | 6920 | else
|
---|
| 6921 | {
|
---|
[32536] | 6922 | VDGEOMETRY LCHS;
|
---|
| 6923 | rc = pImage->Backend->pfnGetLCHSGeometry(pImage->pBackendData,
|
---|
[7277] | 6924 | &LCHS);
|
---|
[11266] | 6925 | if ( RT_FAILURE(rc)
|
---|
[6291] | 6926 | || pLCHSGeometry->cCylinders != LCHS.cCylinders
|
---|
| 6927 | || pLCHSGeometry->cHeads != LCHS.cHeads
|
---|
| 6928 | || pLCHSGeometry->cSectors != LCHS.cSectors)
|
---|
| 6929 | {
|
---|
| 6930 | /* Only update geometry if it is changed. Avoids similar checks
|
---|
| 6931 | * in every backend. Most of the time the new geometry is set
|
---|
| 6932 | * to the previous values, so no need to go through the hassle
|
---|
| 6933 | * of updating an image which could be opened in read-only mode
|
---|
| 6934 | * right now. */
|
---|
[32536] | 6935 | rc = pImage->Backend->pfnSetLCHSGeometry(pImage->pBackendData,
|
---|
[7277] | 6936 | pLCHSGeometry);
|
---|
[6291] | 6937 | }
|
---|
| 6938 | }
|
---|
| 6939 | } while (0);
|
---|
[2379] | 6940 |
|
---|
[27232] | 6941 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 6942 | {
|
---|
| 6943 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 6944 | AssertRC(rc2);
|
---|
| 6945 | }
|
---|
| 6946 |
|
---|
[11284] | 6947 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[2379] | 6948 | return rc;
|
---|
| 6949 | }
|
---|
| 6950 |
|
---|
| 6951 | /**
|
---|
| 6952 | * Get version of image in HDD container.
|
---|
| 6953 | *
|
---|
| 6954 | * @returns VBox status code.
|
---|
[15366] | 6955 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[6291] | 6956 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 6957 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 6958 | * @param puVersion Where to store the image version.
|
---|
| 6959 | */
|
---|
[2590] | 6960 | VBOXDDU_DECL(int) VDGetVersion(PVBOXHDD pDisk, unsigned nImage,
|
---|
| 6961 | unsigned *puVersion)
|
---|
[2379] | 6962 | {
|
---|
[6291] | 6963 | int rc = VINF_SUCCESS;
|
---|
[27232] | 6964 | int rc2;
|
---|
| 6965 | bool fLockRead = false;
|
---|
[6291] | 6966 |
|
---|
| 6967 | LogFlowFunc(("pDisk=%#p nImage=%u puVersion=%#p\n",
|
---|
| 6968 | pDisk, nImage, puVersion));
|
---|
| 6969 | do
|
---|
| 6970 | {
|
---|
| 6971 | /* sanity check */
|
---|
[8569] | 6972 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6973 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 6974 |
|
---|
| 6975 | /* Check arguments. */
|
---|
[8565] | 6976 | AssertMsgBreakStmt(VALID_PTR(puVersion),
|
---|
| 6977 | ("puVersion=%#p\n", puVersion),
|
---|
| 6978 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 6979 |
|
---|
[27232] | 6980 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 6981 | AssertRC(rc2);
|
---|
| 6982 | fLockRead = true;
|
---|
| 6983 |
|
---|
[6291] | 6984 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 6985 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 6986 |
|
---|
[32536] | 6987 | *puVersion = pImage->Backend->pfnGetVersion(pImage->pBackendData);
|
---|
[6291] | 6988 | } while (0);
|
---|
| 6989 |
|
---|
[27232] | 6990 | if (RT_UNLIKELY(fLockRead))
|
---|
| 6991 | {
|
---|
| 6992 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 6993 | AssertRC(rc2);
|
---|
| 6994 | }
|
---|
| 6995 |
|
---|
[11284] | 6996 | LogFlowFunc(("returns %Rrc uVersion=%#x\n", rc, *puVersion));
|
---|
[6291] | 6997 | return rc;
|
---|
[2379] | 6998 | }
|
---|
| 6999 |
|
---|
| 7000 | /**
|
---|
[10715] | 7001 | * List the capabilities of image backend in HDD container.
|
---|
| 7002 | *
|
---|
| 7003 | * @returns VBox status code.
|
---|
[15366] | 7004 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[10715] | 7005 | * @param pDisk Pointer to the HDD container.
|
---|
| 7006 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 7007 | * @param pbackendInfo Where to store the backend information.
|
---|
| 7008 | */
|
---|
| 7009 | VBOXDDU_DECL(int) VDBackendInfoSingle(PVBOXHDD pDisk, unsigned nImage,
|
---|
| 7010 | PVDBACKENDINFO pBackendInfo)
|
---|
| 7011 | {
|
---|
| 7012 | int rc = VINF_SUCCESS;
|
---|
[27232] | 7013 | int rc2;
|
---|
| 7014 | bool fLockRead = false;
|
---|
[10715] | 7015 |
|
---|
[17970] | 7016 | LogFlowFunc(("pDisk=%#p nImage=%u pBackendInfo=%#p\n",
|
---|
[10715] | 7017 | pDisk, nImage, pBackendInfo));
|
---|
| 7018 | do
|
---|
| 7019 | {
|
---|
| 7020 | /* sanity check */
|
---|
| 7021 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
| 7022 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7023 |
|
---|
| 7024 | /* Check arguments. */
|
---|
| 7025 | AssertMsgBreakStmt(VALID_PTR(pBackendInfo),
|
---|
| 7026 | ("pBackendInfo=%#p\n", pBackendInfo),
|
---|
| 7027 | rc = VERR_INVALID_PARAMETER);
|
---|
| 7028 |
|
---|
[27232] | 7029 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 7030 | AssertRC(rc2);
|
---|
| 7031 | fLockRead = true;
|
---|
| 7032 |
|
---|
[10715] | 7033 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 7034 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[10715] | 7035 |
|
---|
[27232] | 7036 | pBackendInfo->pszBackend = pImage->Backend->pszBackendName;
|
---|
[17970] | 7037 | pBackendInfo->uBackendCaps = pImage->Backend->uBackendCaps;
|
---|
| 7038 | pBackendInfo->papszFileExtensions = pImage->Backend->papszFileExtensions;
|
---|
| 7039 | pBackendInfo->paConfigInfo = pImage->Backend->paConfigInfo;
|
---|
[10715] | 7040 | } while (0);
|
---|
| 7041 |
|
---|
[27232] | 7042 | if (RT_UNLIKELY(fLockRead))
|
---|
| 7043 | {
|
---|
| 7044 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 7045 | AssertRC(rc2);
|
---|
| 7046 | }
|
---|
| 7047 |
|
---|
[11284] | 7048 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[10715] | 7049 | return rc;
|
---|
| 7050 | }
|
---|
| 7051 |
|
---|
| 7052 | /**
|
---|
[2379] | 7053 | * Get flags of image in HDD container.
|
---|
| 7054 | *
|
---|
| 7055 | * @returns VBox status code.
|
---|
[15366] | 7056 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[6291] | 7057 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 7058 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 7059 | * @param puImageFlags Where to store the image flags.
|
---|
| 7060 | */
|
---|
[2590] | 7061 | VBOXDDU_DECL(int) VDGetImageFlags(PVBOXHDD pDisk, unsigned nImage,
|
---|
| 7062 | unsigned *puImageFlags)
|
---|
[2379] | 7063 | {
|
---|
[6291] | 7064 | int rc = VINF_SUCCESS;
|
---|
[27232] | 7065 | int rc2;
|
---|
| 7066 | bool fLockRead = false;
|
---|
[6291] | 7067 |
|
---|
| 7068 | LogFlowFunc(("pDisk=%#p nImage=%u puImageFlags=%#p\n",
|
---|
| 7069 | pDisk, nImage, puImageFlags));
|
---|
| 7070 | do
|
---|
| 7071 | {
|
---|
| 7072 | /* sanity check */
|
---|
[8569] | 7073 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7074 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7075 |
|
---|
| 7076 | /* Check arguments. */
|
---|
[8565] | 7077 | AssertMsgBreakStmt(VALID_PTR(puImageFlags),
|
---|
| 7078 | ("puImageFlags=%#p\n", puImageFlags),
|
---|
| 7079 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7080 |
|
---|
[27232] | 7081 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 7082 | AssertRC(rc2);
|
---|
| 7083 | fLockRead = true;
|
---|
| 7084 |
|
---|
[6291] | 7085 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 7086 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 7087 |
|
---|
[31258] | 7088 | *puImageFlags = pImage->uImageFlags;
|
---|
[6291] | 7089 | } while (0);
|
---|
| 7090 |
|
---|
[27232] | 7091 | if (RT_UNLIKELY(fLockRead))
|
---|
| 7092 | {
|
---|
| 7093 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 7094 | AssertRC(rc2);
|
---|
| 7095 | }
|
---|
| 7096 |
|
---|
[11284] | 7097 | LogFlowFunc(("returns %Rrc uImageFlags=%#x\n", rc, *puImageFlags));
|
---|
[6291] | 7098 | return rc;
|
---|
[2379] | 7099 | }
|
---|
| 7100 |
|
---|
| 7101 | /**
|
---|
[6291] | 7102 | * Get open flags of image in HDD container.
|
---|
[2379] | 7103 | *
|
---|
| 7104 | * @returns VBox status code.
|
---|
[15366] | 7105 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[6291] | 7106 | * @param pDisk Pointer to HDD container.
|
---|
| 7107 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
[2379] | 7108 | * @param puOpenFlags Where to store the image open flags.
|
---|
| 7109 | */
|
---|
[6291] | 7110 | VBOXDDU_DECL(int) VDGetOpenFlags(PVBOXHDD pDisk, unsigned nImage,
|
---|
| 7111 | unsigned *puOpenFlags)
|
---|
[2379] | 7112 | {
|
---|
[6291] | 7113 | int rc = VINF_SUCCESS;
|
---|
[27232] | 7114 | int rc2;
|
---|
| 7115 | bool fLockRead = false;
|
---|
[2379] | 7116 |
|
---|
[6291] | 7117 | LogFlowFunc(("pDisk=%#p nImage=%u puOpenFlags=%#p\n",
|
---|
| 7118 | pDisk, nImage, puOpenFlags));
|
---|
| 7119 | do
|
---|
[2379] | 7120 | {
|
---|
[6291] | 7121 | /* sanity check */
|
---|
[8569] | 7122 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7123 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7124 |
|
---|
| 7125 | /* Check arguments. */
|
---|
[8565] | 7126 | AssertMsgBreakStmt(VALID_PTR(puOpenFlags),
|
---|
| 7127 | ("puOpenFlags=%#p\n", puOpenFlags),
|
---|
| 7128 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7129 |
|
---|
[27232] | 7130 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 7131 | AssertRC(rc2);
|
---|
| 7132 | fLockRead = true;
|
---|
| 7133 |
|
---|
[6291] | 7134 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 7135 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 7136 |
|
---|
[32536] | 7137 | *puOpenFlags = pImage->Backend->pfnGetOpenFlags(pImage->pBackendData);
|
---|
[6291] | 7138 | } while (0);
|
---|
| 7139 |
|
---|
[27232] | 7140 | if (RT_UNLIKELY(fLockRead))
|
---|
| 7141 | {
|
---|
| 7142 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 7143 | AssertRC(rc2);
|
---|
| 7144 | }
|
---|
| 7145 |
|
---|
[11284] | 7146 | LogFlowFunc(("returns %Rrc uOpenFlags=%#x\n", rc, *puOpenFlags));
|
---|
[6291] | 7147 | return rc;
|
---|
[2379] | 7148 | }
|
---|
| 7149 |
|
---|
| 7150 | /**
|
---|
[6291] | 7151 | * Set open flags of image in HDD container.
|
---|
[2379] | 7152 | * This operation may cause file locking changes and/or files being reopened.
|
---|
| 7153 | * Note that in case of unrecoverable error all images in HDD container will be closed.
|
---|
| 7154 | *
|
---|
[6291] | 7155 | * @returns VBox status code.
|
---|
[15366] | 7156 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[6291] | 7157 | * @param pDisk Pointer to HDD container.
|
---|
| 7158 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
[2379] | 7159 | * @param uOpenFlags Image file open mode, see VD_OPEN_FLAGS_* constants.
|
---|
| 7160 | */
|
---|
[6291] | 7161 | VBOXDDU_DECL(int) VDSetOpenFlags(PVBOXHDD pDisk, unsigned nImage,
|
---|
| 7162 | unsigned uOpenFlags)
|
---|
[2379] | 7163 | {
|
---|
[6291] | 7164 | int rc;
|
---|
[27232] | 7165 | int rc2;
|
---|
| 7166 | bool fLockWrite = false;
|
---|
[2379] | 7167 |
|
---|
[6291] | 7168 | LogFlowFunc(("pDisk=%#p uOpenFlags=%#u\n", pDisk, uOpenFlags));
|
---|
| 7169 | do
|
---|
[2379] | 7170 | {
|
---|
[6291] | 7171 | /* sanity check */
|
---|
[8569] | 7172 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7173 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7174 |
|
---|
| 7175 | /* Check arguments. */
|
---|
[8565] | 7176 | AssertMsgBreakStmt((uOpenFlags & ~VD_OPEN_FLAGS_MASK) == 0,
|
---|
| 7177 | ("uOpenFlags=%#x\n", uOpenFlags),
|
---|
| 7178 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7179 |
|
---|
[27232] | 7180 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 7181 | AssertRC(rc2);
|
---|
| 7182 | fLockWrite = true;
|
---|
| 7183 |
|
---|
[6291] | 7184 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 7185 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 7186 |
|
---|
[32536] | 7187 | rc = pImage->Backend->pfnSetOpenFlags(pImage->pBackendData,
|
---|
[7277] | 7188 | uOpenFlags);
|
---|
[6291] | 7189 | } while (0);
|
---|
| 7190 |
|
---|
[27232] | 7191 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 7192 | {
|
---|
| 7193 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 7194 | AssertRC(rc2);
|
---|
| 7195 | }
|
---|
| 7196 |
|
---|
[11284] | 7197 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[2379] | 7198 | return rc;
|
---|
| 7199 | }
|
---|
| 7200 |
|
---|
| 7201 | /**
|
---|
| 7202 | * Get base filename of image in HDD container. Some image formats use
|
---|
[6291] | 7203 | * other filenames as well, so don't use this for anything but informational
|
---|
[2379] | 7204 | * purposes.
|
---|
| 7205 | *
|
---|
| 7206 | * @returns VBox status code.
|
---|
[15366] | 7207 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[2379] | 7208 | * @returns VERR_BUFFER_OVERFLOW if pszFilename buffer too small to hold filename.
|
---|
[6291] | 7209 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 7210 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 7211 | * @param pszFilename Where to store the image file name.
|
---|
| 7212 | * @param cbFilename Size of buffer pszFilename points to.
|
---|
| 7213 | */
|
---|
[2590] | 7214 | VBOXDDU_DECL(int) VDGetFilename(PVBOXHDD pDisk, unsigned nImage,
|
---|
| 7215 | char *pszFilename, unsigned cbFilename)
|
---|
[2379] | 7216 | {
|
---|
[6291] | 7217 | int rc;
|
---|
[27232] | 7218 | int rc2;
|
---|
| 7219 | bool fLockRead = false;
|
---|
[6291] | 7220 |
|
---|
| 7221 | LogFlowFunc(("pDisk=%#p nImage=%u pszFilename=%#p cbFilename=%u\n",
|
---|
| 7222 | pDisk, nImage, pszFilename, cbFilename));
|
---|
| 7223 | do
|
---|
| 7224 | {
|
---|
| 7225 | /* sanity check */
|
---|
[8569] | 7226 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7227 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7228 |
|
---|
| 7229 | /* Check arguments. */
|
---|
[8565] | 7230 | AssertMsgBreakStmt(VALID_PTR(pszFilename) && *pszFilename,
|
---|
| 7231 | ("pszFilename=%#p \"%s\"\n", pszFilename, pszFilename),
|
---|
| 7232 | rc = VERR_INVALID_PARAMETER);
|
---|
| 7233 | AssertMsgBreakStmt(cbFilename,
|
---|
| 7234 | ("cbFilename=%u\n", cbFilename),
|
---|
| 7235 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7236 |
|
---|
[27232] | 7237 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 7238 | AssertRC(rc2);
|
---|
| 7239 | fLockRead = true;
|
---|
| 7240 |
|
---|
[6291] | 7241 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 7242 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 7243 |
|
---|
| 7244 | size_t cb = strlen(pImage->pszFilename);
|
---|
| 7245 | if (cb <= cbFilename)
|
---|
| 7246 | {
|
---|
| 7247 | strcpy(pszFilename, pImage->pszFilename);
|
---|
| 7248 | rc = VINF_SUCCESS;
|
---|
| 7249 | }
|
---|
| 7250 | else
|
---|
| 7251 | {
|
---|
| 7252 | strncpy(pszFilename, pImage->pszFilename, cbFilename - 1);
|
---|
| 7253 | pszFilename[cbFilename - 1] = '\0';
|
---|
| 7254 | rc = VERR_BUFFER_OVERFLOW;
|
---|
| 7255 | }
|
---|
| 7256 | } while (0);
|
---|
| 7257 |
|
---|
[27232] | 7258 | if (RT_UNLIKELY(fLockRead))
|
---|
| 7259 | {
|
---|
| 7260 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 7261 | AssertRC(rc2);
|
---|
| 7262 | }
|
---|
| 7263 |
|
---|
[11284] | 7264 | LogFlowFunc(("returns %Rrc, pszFilename=\"%s\"\n", rc, pszFilename));
|
---|
[6291] | 7265 | return rc;
|
---|
[2379] | 7266 | }
|
---|
| 7267 |
|
---|
| 7268 | /**
|
---|
| 7269 | * Get the comment line of image in HDD container.
|
---|
| 7270 | *
|
---|
| 7271 | * @returns VBox status code.
|
---|
[15366] | 7272 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[2379] | 7273 | * @returns VERR_BUFFER_OVERFLOW if pszComment buffer too small to hold comment text.
|
---|
[6291] | 7274 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 7275 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 7276 | * @param pszComment Where to store the comment string of image. NULL is ok.
|
---|
| 7277 | * @param cbComment The size of pszComment buffer. 0 is ok.
|
---|
| 7278 | */
|
---|
[2590] | 7279 | VBOXDDU_DECL(int) VDGetComment(PVBOXHDD pDisk, unsigned nImage,
|
---|
| 7280 | char *pszComment, unsigned cbComment)
|
---|
[2379] | 7281 | {
|
---|
[6291] | 7282 | int rc;
|
---|
[27232] | 7283 | int rc2;
|
---|
| 7284 | bool fLockRead = false;
|
---|
[2742] | 7285 |
|
---|
[6291] | 7286 | LogFlowFunc(("pDisk=%#p nImage=%u pszComment=%#p cbComment=%u\n",
|
---|
| 7287 | pDisk, nImage, pszComment, cbComment));
|
---|
| 7288 | do
|
---|
| 7289 | {
|
---|
| 7290 | /* sanity check */
|
---|
[8569] | 7291 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7292 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7293 |
|
---|
| 7294 | /* Check arguments. */
|
---|
[8565] | 7295 | AssertMsgBreakStmt(VALID_PTR(pszComment),
|
---|
| 7296 | ("pszComment=%#p \"%s\"\n", pszComment, pszComment),
|
---|
| 7297 | rc = VERR_INVALID_PARAMETER);
|
---|
| 7298 | AssertMsgBreakStmt(cbComment,
|
---|
| 7299 | ("cbComment=%u\n", cbComment),
|
---|
| 7300 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7301 |
|
---|
[27232] | 7302 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 7303 | AssertRC(rc2);
|
---|
| 7304 | fLockRead = true;
|
---|
| 7305 |
|
---|
[6291] | 7306 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 7307 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 7308 |
|
---|
[32536] | 7309 | rc = pImage->Backend->pfnGetComment(pImage->pBackendData, pszComment,
|
---|
[7277] | 7310 | cbComment);
|
---|
[6291] | 7311 | } while (0);
|
---|
[2742] | 7312 |
|
---|
[27232] | 7313 | if (RT_UNLIKELY(fLockRead))
|
---|
| 7314 | {
|
---|
| 7315 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 7316 | AssertRC(rc2);
|
---|
| 7317 | }
|
---|
| 7318 |
|
---|
[11284] | 7319 | LogFlowFunc(("returns %Rrc, pszComment=\"%s\"\n", rc, pszComment));
|
---|
[2742] | 7320 | return rc;
|
---|
[2379] | 7321 | }
|
---|
| 7322 |
|
---|
| 7323 | /**
|
---|
[2590] | 7324 | * Changes the comment line of image in HDD container.
|
---|
| 7325 | *
|
---|
| 7326 | * @returns VBox status code.
|
---|
[15366] | 7327 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[6291] | 7328 | * @param pDisk Pointer to HDD container.
|
---|
[2590] | 7329 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 7330 | * @param pszComment New comment string (UTF-8). NULL is allowed to reset the comment.
|
---|
| 7331 | */
|
---|
| 7332 | VBOXDDU_DECL(int) VDSetComment(PVBOXHDD pDisk, unsigned nImage,
|
---|
| 7333 | const char *pszComment)
|
---|
[2379] | 7334 | {
|
---|
[6291] | 7335 | int rc;
|
---|
[27232] | 7336 | int rc2;
|
---|
| 7337 | bool fLockWrite = false;
|
---|
[2742] | 7338 |
|
---|
[6291] | 7339 | LogFlowFunc(("pDisk=%#p nImage=%u pszComment=%#p \"%s\"\n",
|
---|
| 7340 | pDisk, nImage, pszComment, pszComment));
|
---|
| 7341 | do
|
---|
| 7342 | {
|
---|
| 7343 | /* sanity check */
|
---|
[8569] | 7344 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7345 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7346 |
|
---|
| 7347 | /* Check arguments. */
|
---|
[8565] | 7348 | AssertMsgBreakStmt(VALID_PTR(pszComment) || pszComment == NULL,
|
---|
| 7349 | ("pszComment=%#p \"%s\"\n", pszComment, pszComment),
|
---|
| 7350 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7351 |
|
---|
[27232] | 7352 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 7353 | AssertRC(rc2);
|
---|
| 7354 | fLockWrite = true;
|
---|
| 7355 |
|
---|
[6291] | 7356 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 7357 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 7358 |
|
---|
[32536] | 7359 | rc = pImage->Backend->pfnSetComment(pImage->pBackendData, pszComment);
|
---|
[6291] | 7360 | } while (0);
|
---|
[2742] | 7361 |
|
---|
[27232] | 7362 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 7363 | {
|
---|
| 7364 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 7365 | AssertRC(rc2);
|
---|
| 7366 | }
|
---|
| 7367 |
|
---|
[11284] | 7368 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[2742] | 7369 | return rc;
|
---|
[2379] | 7370 | }
|
---|
| 7371 |
|
---|
| 7372 |
|
---|
| 7373 | /**
|
---|
| 7374 | * Get UUID of image in HDD container.
|
---|
| 7375 | *
|
---|
| 7376 | * @returns VBox status code.
|
---|
[15366] | 7377 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[6291] | 7378 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 7379 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 7380 | * @param pUuid Where to store the image creation UUID.
|
---|
| 7381 | */
|
---|
| 7382 | VBOXDDU_DECL(int) VDGetUuid(PVBOXHDD pDisk, unsigned nImage, PRTUUID pUuid)
|
---|
| 7383 | {
|
---|
[6291] | 7384 | int rc;
|
---|
[27232] | 7385 | int rc2;
|
---|
| 7386 | bool fLockRead = false;
|
---|
[2379] | 7387 |
|
---|
[6291] | 7388 | LogFlowFunc(("pDisk=%#p nImage=%u pUuid=%#p\n", pDisk, nImage, pUuid));
|
---|
| 7389 | do
|
---|
| 7390 | {
|
---|
| 7391 | /* sanity check */
|
---|
[8569] | 7392 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7393 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7394 |
|
---|
| 7395 | /* Check arguments. */
|
---|
[8565] | 7396 | AssertMsgBreakStmt(VALID_PTR(pUuid),
|
---|
| 7397 | ("pUuid=%#p\n", pUuid),
|
---|
| 7398 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7399 |
|
---|
[27232] | 7400 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 7401 | AssertRC(rc2);
|
---|
| 7402 | fLockRead = true;
|
---|
| 7403 |
|
---|
[6291] | 7404 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 7405 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 7406 |
|
---|
[32536] | 7407 | rc = pImage->Backend->pfnGetUuid(pImage->pBackendData, pUuid);
|
---|
[6291] | 7408 | } while (0);
|
---|
[2379] | 7409 |
|
---|
[27232] | 7410 | if (RT_UNLIKELY(fLockRead))
|
---|
| 7411 | {
|
---|
| 7412 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 7413 | AssertRC(rc2);
|
---|
| 7414 | }
|
---|
| 7415 |
|
---|
[11287] | 7416 | LogFlowFunc(("returns %Rrc, Uuid={%RTuuid}\n", rc, pUuid));
|
---|
[2379] | 7417 | return rc;
|
---|
| 7418 | }
|
---|
| 7419 |
|
---|
| 7420 | /**
|
---|
| 7421 | * Set the image's UUID. Should not be used by normal applications.
|
---|
| 7422 | *
|
---|
| 7423 | * @returns VBox status code.
|
---|
[15366] | 7424 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[6291] | 7425 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 7426 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
[6291] | 7427 | * @param pUuid New UUID of the image. If NULL, a new UUID is created.
|
---|
[2379] | 7428 | */
|
---|
| 7429 | VBOXDDU_DECL(int) VDSetUuid(PVBOXHDD pDisk, unsigned nImage, PCRTUUID pUuid)
|
---|
| 7430 | {
|
---|
[6291] | 7431 | int rc;
|
---|
[27232] | 7432 | int rc2;
|
---|
| 7433 | bool fLockWrite = false;
|
---|
[2379] | 7434 |
|
---|
[11287] | 7435 | LogFlowFunc(("pDisk=%#p nImage=%u pUuid=%#p {%RTuuid}\n",
|
---|
[6291] | 7436 | pDisk, nImage, pUuid, pUuid));
|
---|
| 7437 | do
|
---|
| 7438 | {
|
---|
| 7439 | /* sanity check */
|
---|
[8569] | 7440 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7441 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7442 |
|
---|
[8565] | 7443 | AssertMsgBreakStmt(VALID_PTR(pUuid) || pUuid == NULL,
|
---|
| 7444 | ("pUuid=%#p\n", pUuid),
|
---|
| 7445 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7446 |
|
---|
[27232] | 7447 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 7448 | AssertRC(rc2);
|
---|
| 7449 | fLockWrite = true;
|
---|
| 7450 |
|
---|
[6291] | 7451 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 7452 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 7453 |
|
---|
| 7454 | RTUUID Uuid;
|
---|
| 7455 | if (!pUuid)
|
---|
| 7456 | {
|
---|
| 7457 | RTUuidCreate(&Uuid);
|
---|
| 7458 | pUuid = &Uuid;
|
---|
| 7459 | }
|
---|
[32536] | 7460 | rc = pImage->Backend->pfnSetUuid(pImage->pBackendData, pUuid);
|
---|
[6291] | 7461 | } while (0);
|
---|
[2379] | 7462 |
|
---|
[27232] | 7463 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 7464 | {
|
---|
| 7465 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 7466 | AssertRC(rc2);
|
---|
| 7467 | }
|
---|
| 7468 |
|
---|
[11284] | 7469 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[2379] | 7470 | return rc;
|
---|
| 7471 | }
|
---|
| 7472 |
|
---|
| 7473 | /**
|
---|
| 7474 | * Get last modification UUID of image in HDD container.
|
---|
| 7475 | *
|
---|
| 7476 | * @returns VBox status code.
|
---|
[15366] | 7477 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[6291] | 7478 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 7479 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 7480 | * @param pUuid Where to store the image modification UUID.
|
---|
| 7481 | */
|
---|
| 7482 | VBOXDDU_DECL(int) VDGetModificationUuid(PVBOXHDD pDisk, unsigned nImage, PRTUUID pUuid)
|
---|
| 7483 | {
|
---|
[6291] | 7484 | int rc = VINF_SUCCESS;
|
---|
[27232] | 7485 | int rc2;
|
---|
| 7486 | bool fLockRead = false;
|
---|
[2379] | 7487 |
|
---|
[6291] | 7488 | LogFlowFunc(("pDisk=%#p nImage=%u pUuid=%#p\n", pDisk, nImage, pUuid));
|
---|
| 7489 | do
|
---|
| 7490 | {
|
---|
| 7491 | /* sanity check */
|
---|
[8569] | 7492 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7493 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
[2379] | 7494 |
|
---|
[6291] | 7495 | /* Check arguments. */
|
---|
[8565] | 7496 | AssertMsgBreakStmt(VALID_PTR(pUuid),
|
---|
| 7497 | ("pUuid=%#p\n", pUuid),
|
---|
| 7498 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7499 |
|
---|
[27232] | 7500 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 7501 | AssertRC(rc2);
|
---|
| 7502 | fLockRead = true;
|
---|
| 7503 |
|
---|
[6291] | 7504 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 7505 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 7506 |
|
---|
[32536] | 7507 | rc = pImage->Backend->pfnGetModificationUuid(pImage->pBackendData,
|
---|
[7277] | 7508 | pUuid);
|
---|
[6291] | 7509 | } while (0);
|
---|
| 7510 |
|
---|
[27232] | 7511 | if (RT_UNLIKELY(fLockRead))
|
---|
| 7512 | {
|
---|
| 7513 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 7514 | AssertRC(rc2);
|
---|
| 7515 | }
|
---|
| 7516 |
|
---|
[11287] | 7517 | LogFlowFunc(("returns %Rrc, Uuid={%RTuuid}\n", rc, pUuid));
|
---|
[2379] | 7518 | return rc;
|
---|
| 7519 | }
|
---|
| 7520 |
|
---|
| 7521 | /**
|
---|
| 7522 | * Set the image's last modification UUID. Should not be used by normal applications.
|
---|
| 7523 | *
|
---|
| 7524 | * @returns VBox status code.
|
---|
[15366] | 7525 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[6291] | 7526 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 7527 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
[6291] | 7528 | * @param pUuid New modification UUID of the image. If NULL, a new UUID is created.
|
---|
[2379] | 7529 | */
|
---|
| 7530 | VBOXDDU_DECL(int) VDSetModificationUuid(PVBOXHDD pDisk, unsigned nImage, PCRTUUID pUuid)
|
---|
| 7531 | {
|
---|
| 7532 | int rc;
|
---|
[27232] | 7533 | int rc2;
|
---|
| 7534 | bool fLockWrite = false;
|
---|
[2379] | 7535 |
|
---|
[11287] | 7536 | LogFlowFunc(("pDisk=%#p nImage=%u pUuid=%#p {%RTuuid}\n",
|
---|
[6291] | 7537 | pDisk, nImage, pUuid, pUuid));
|
---|
| 7538 | do
|
---|
| 7539 | {
|
---|
| 7540 | /* sanity check */
|
---|
[8569] | 7541 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7542 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7543 |
|
---|
| 7544 | /* Check arguments. */
|
---|
[8565] | 7545 | AssertMsgBreakStmt(VALID_PTR(pUuid) || pUuid == NULL,
|
---|
| 7546 | ("pUuid=%#p\n", pUuid),
|
---|
| 7547 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7548 |
|
---|
[27232] | 7549 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 7550 | AssertRC(rc2);
|
---|
| 7551 | fLockWrite = true;
|
---|
| 7552 |
|
---|
[6291] | 7553 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 7554 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 7555 |
|
---|
| 7556 | RTUUID Uuid;
|
---|
| 7557 | if (!pUuid)
|
---|
| 7558 | {
|
---|
| 7559 | RTUuidCreate(&Uuid);
|
---|
| 7560 | pUuid = &Uuid;
|
---|
| 7561 | }
|
---|
[32536] | 7562 | rc = pImage->Backend->pfnSetModificationUuid(pImage->pBackendData,
|
---|
[7277] | 7563 | pUuid);
|
---|
[6291] | 7564 | } while (0);
|
---|
| 7565 |
|
---|
[27232] | 7566 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 7567 | {
|
---|
| 7568 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 7569 | AssertRC(rc2);
|
---|
| 7570 | }
|
---|
| 7571 |
|
---|
[11284] | 7572 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[2379] | 7573 | return rc;
|
---|
| 7574 | }
|
---|
| 7575 |
|
---|
| 7576 | /**
|
---|
| 7577 | * Get parent UUID of image in HDD container.
|
---|
| 7578 | *
|
---|
| 7579 | * @returns VBox status code.
|
---|
[15366] | 7580 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
[6291] | 7581 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 7582 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 7583 | * @param pUuid Where to store the parent image UUID.
|
---|
| 7584 | */
|
---|
[2590] | 7585 | VBOXDDU_DECL(int) VDGetParentUuid(PVBOXHDD pDisk, unsigned nImage,
|
---|
| 7586 | PRTUUID pUuid)
|
---|
[2379] | 7587 | {
|
---|
[6291] | 7588 | int rc = VINF_SUCCESS;
|
---|
[27232] | 7589 | int rc2;
|
---|
| 7590 | bool fLockRead = false;
|
---|
[2379] | 7591 |
|
---|
[6291] | 7592 | LogFlowFunc(("pDisk=%#p nImage=%u pUuid=%#p\n", pDisk, nImage, pUuid));
|
---|
| 7593 | do
|
---|
| 7594 | {
|
---|
| 7595 | /* sanity check */
|
---|
[8569] | 7596 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7597 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7598 |
|
---|
| 7599 | /* Check arguments. */
|
---|
[8565] | 7600 | AssertMsgBreakStmt(VALID_PTR(pUuid),
|
---|
| 7601 | ("pUuid=%#p\n", pUuid),
|
---|
| 7602 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7603 |
|
---|
[27232] | 7604 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 7605 | AssertRC(rc2);
|
---|
| 7606 | fLockRead = true;
|
---|
| 7607 |
|
---|
[6291] | 7608 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 7609 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 7610 |
|
---|
[32536] | 7611 | rc = pImage->Backend->pfnGetParentUuid(pImage->pBackendData, pUuid);
|
---|
[6291] | 7612 | } while (0);
|
---|
[2379] | 7613 |
|
---|
[27232] | 7614 | if (RT_UNLIKELY(fLockRead))
|
---|
| 7615 | {
|
---|
| 7616 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 7617 | AssertRC(rc2);
|
---|
| 7618 | }
|
---|
| 7619 |
|
---|
[11287] | 7620 | LogFlowFunc(("returns %Rrc, Uuid={%RTuuid}\n", rc, pUuid));
|
---|
[2379] | 7621 | return rc;
|
---|
| 7622 | }
|
---|
| 7623 |
|
---|
| 7624 | /**
|
---|
| 7625 | * Set the image's parent UUID. Should not be used by normal applications.
|
---|
| 7626 | *
|
---|
| 7627 | * @returns VBox status code.
|
---|
[6291] | 7628 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 7629 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
[6291] | 7630 | * @param pUuid New parent UUID of the image. If NULL, a new UUID is created.
|
---|
[2379] | 7631 | */
|
---|
[2590] | 7632 | VBOXDDU_DECL(int) VDSetParentUuid(PVBOXHDD pDisk, unsigned nImage,
|
---|
| 7633 | PCRTUUID pUuid)
|
---|
[2379] | 7634 | {
|
---|
[6291] | 7635 | int rc;
|
---|
[27232] | 7636 | int rc2;
|
---|
| 7637 | bool fLockWrite = false;
|
---|
[2379] | 7638 |
|
---|
[11287] | 7639 | LogFlowFunc(("pDisk=%#p nImage=%u pUuid=%#p {%RTuuid}\n",
|
---|
[6291] | 7640 | pDisk, nImage, pUuid, pUuid));
|
---|
| 7641 | do
|
---|
| 7642 | {
|
---|
| 7643 | /* sanity check */
|
---|
[8569] | 7644 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7645 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7646 |
|
---|
| 7647 | /* Check arguments. */
|
---|
[8565] | 7648 | AssertMsgBreakStmt(VALID_PTR(pUuid) || pUuid == NULL,
|
---|
| 7649 | ("pUuid=%#p\n", pUuid),
|
---|
| 7650 | rc = VERR_INVALID_PARAMETER);
|
---|
[6291] | 7651 |
|
---|
[27232] | 7652 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 7653 | AssertRC(rc2);
|
---|
| 7654 | fLockWrite = true;
|
---|
| 7655 |
|
---|
[6291] | 7656 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
[15366] | 7657 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
[6291] | 7658 |
|
---|
| 7659 | RTUUID Uuid;
|
---|
| 7660 | if (!pUuid)
|
---|
| 7661 | {
|
---|
| 7662 | RTUuidCreate(&Uuid);
|
---|
| 7663 | pUuid = &Uuid;
|
---|
| 7664 | }
|
---|
[32536] | 7665 | rc = pImage->Backend->pfnSetParentUuid(pImage->pBackendData, pUuid);
|
---|
[6291] | 7666 | } while (0);
|
---|
[2379] | 7667 |
|
---|
[27232] | 7668 | if (RT_UNLIKELY(fLockWrite))
|
---|
| 7669 | {
|
---|
| 7670 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 7671 | AssertRC(rc2);
|
---|
| 7672 | }
|
---|
| 7673 |
|
---|
[11284] | 7674 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
[2379] | 7675 | return rc;
|
---|
| 7676 | }
|
---|
| 7677 |
|
---|
| 7678 |
|
---|
| 7679 | /**
|
---|
| 7680 | * Debug helper - dumps all opened images in HDD container into the log file.
|
---|
| 7681 | *
|
---|
[6291] | 7682 | * @param pDisk Pointer to HDD container.
|
---|
[2379] | 7683 | */
|
---|
| 7684 | VBOXDDU_DECL(void) VDDumpImages(PVBOXHDD pDisk)
|
---|
| 7685 | {
|
---|
[27232] | 7686 | int rc2;
|
---|
| 7687 | bool fLockRead = false;
|
---|
| 7688 |
|
---|
[6291] | 7689 | do
|
---|
| 7690 | {
|
---|
| 7691 | /* sanity check */
|
---|
[8594] | 7692 | AssertPtrBreak(pDisk);
|
---|
[6291] | 7693 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
[2379] | 7694 |
|
---|
[32536] | 7695 | if (!pDisk->pInterfaceErrorCallbacks || !VALID_PTR(pDisk->pInterfaceErrorCallbacks->pfnMessage))
|
---|
[21806] | 7696 | pDisk->pInterfaceErrorCallbacks->pfnMessage = vdLogMessage;
|
---|
| 7697 |
|
---|
[27232] | 7698 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 7699 | AssertRC(rc2);
|
---|
| 7700 | fLockRead = true;
|
---|
| 7701 |
|
---|
[32536] | 7702 | vdMessageWrapper(pDisk, "--- Dumping VD Disk, Images=%u\n", pDisk->cImages);
|
---|
[6291] | 7703 | for (PVDIMAGE pImage = pDisk->pBase; pImage; pImage = pImage->pNext)
|
---|
| 7704 | {
|
---|
[32536] | 7705 | vdMessageWrapper(pDisk, "Dumping VD image \"%s\" (Backend=%s)\n",
|
---|
| 7706 | pImage->pszFilename, pImage->Backend->pszBackendName);
|
---|
| 7707 | pImage->Backend->pfnDump(pImage->pBackendData);
|
---|
[6291] | 7708 | }
|
---|
| 7709 | } while (0);
|
---|
[27232] | 7710 |
|
---|
| 7711 | if (RT_UNLIKELY(fLockRead))
|
---|
| 7712 | {
|
---|
| 7713 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 7714 | AssertRC(rc2);
|
---|
| 7715 | }
|
---|
[2379] | 7716 | }
|
---|
| 7717 |
|
---|
[26987] | 7718 | /**
|
---|
| 7719 | * Query if asynchronous operations are supported for this disk.
|
---|
| 7720 | *
|
---|
| 7721 | * @returns VBox status code.
|
---|
| 7722 | * @returns VERR_VD_IMAGE_NOT_FOUND if image with specified number was not opened.
|
---|
| 7723 | * @param pDisk Pointer to the HDD container.
|
---|
| 7724 | * @param nImage Image number, counts from 0. 0 is always base image of container.
|
---|
| 7725 | * @param pfAIOSupported Where to store if async IO is supported.
|
---|
| 7726 | */
|
---|
| 7727 | VBOXDDU_DECL(int) VDImageIsAsyncIOSupported(PVBOXHDD pDisk, unsigned nImage, bool *pfAIOSupported)
|
---|
| 7728 | {
|
---|
| 7729 | int rc = VINF_SUCCESS;
|
---|
[27232] | 7730 | int rc2;
|
---|
| 7731 | bool fLockRead = false;
|
---|
[26987] | 7732 |
|
---|
| 7733 | LogFlowFunc(("pDisk=%#p nImage=%u pfAIOSupported=%#p\n", pDisk, nImage, pfAIOSupported));
|
---|
| 7734 | do
|
---|
| 7735 | {
|
---|
| 7736 | /* sanity check */
|
---|
| 7737 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
| 7738 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7739 |
|
---|
| 7740 | /* Check arguments. */
|
---|
| 7741 | AssertMsgBreakStmt(VALID_PTR(pfAIOSupported),
|
---|
| 7742 | ("pfAIOSupported=%#p\n", pfAIOSupported),
|
---|
| 7743 | rc = VERR_INVALID_PARAMETER);
|
---|
| 7744 |
|
---|
[27232] | 7745 | rc2 = vdThreadStartRead(pDisk);
|
---|
| 7746 | AssertRC(rc2);
|
---|
| 7747 | fLockRead = true;
|
---|
| 7748 |
|
---|
[26987] | 7749 | PVDIMAGE pImage = vdGetImageByNumber(pDisk, nImage);
|
---|
| 7750 | AssertPtrBreakStmt(pImage, rc = VERR_VD_IMAGE_NOT_FOUND);
|
---|
| 7751 |
|
---|
| 7752 | if (pImage->Backend->uBackendCaps & VD_CAP_ASYNC)
|
---|
[32536] | 7753 | *pfAIOSupported = pImage->Backend->pfnIsAsyncIOSupported(pImage->pBackendData);
|
---|
[26987] | 7754 | else
|
---|
| 7755 | *pfAIOSupported = false;
|
---|
| 7756 | } while (0);
|
---|
| 7757 |
|
---|
[27232] | 7758 | if (RT_UNLIKELY(fLockRead))
|
---|
| 7759 | {
|
---|
| 7760 | rc2 = vdThreadFinishRead(pDisk);
|
---|
| 7761 | AssertRC(rc2);
|
---|
| 7762 | }
|
---|
| 7763 |
|
---|
[26987] | 7764 | LogFlowFunc(("returns %Rrc, fAIOSupported=%u\n", rc, *pfAIOSupported));
|
---|
| 7765 | return rc;
|
---|
| 7766 | }
|
---|
| 7767 |
|
---|
[27808] | 7768 |
|
---|
[26987] | 7769 | VBOXDDU_DECL(int) VDAsyncRead(PVBOXHDD pDisk, uint64_t uOffset, size_t cbRead,
|
---|
[28065] | 7770 | PCRTSGSEG paSeg, unsigned cSeg,
|
---|
[27808] | 7771 | PFNVDASYNCTRANSFERCOMPLETE pfnComplete,
|
---|
| 7772 | void *pvUser1, void *pvUser2)
|
---|
[26987] | 7773 | {
|
---|
| 7774 | int rc = VERR_VD_BLOCK_FREE;
|
---|
[27232] | 7775 | int rc2;
|
---|
[27808] | 7776 | bool fLockRead = false;
|
---|
[28066] | 7777 | PVDIOCTX pIoCtx = NULL;
|
---|
[26987] | 7778 |
|
---|
[28704] | 7779 | LogFlowFunc(("pDisk=%#p uOffset=%llu paSeg=%p cSeg=%u cbRead=%zu pvUser1=%#p pvUser2=%#p\n",
|
---|
| 7780 | pDisk, uOffset, paSeg, cSeg, cbRead, pvUser1, pvUser2));
|
---|
| 7781 |
|
---|
[26987] | 7782 | do
|
---|
| 7783 | {
|
---|
| 7784 | /* sanity check */
|
---|
| 7785 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
| 7786 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7787 |
|
---|
| 7788 | /* Check arguments. */
|
---|
| 7789 | AssertMsgBreakStmt(cbRead,
|
---|
| 7790 | ("cbRead=%zu\n", cbRead),
|
---|
| 7791 | rc = VERR_INVALID_PARAMETER);
|
---|
| 7792 | AssertMsgBreakStmt(VALID_PTR(paSeg),
|
---|
| 7793 | ("paSeg=%#p\n", paSeg),
|
---|
| 7794 | rc = VERR_INVALID_PARAMETER);
|
---|
| 7795 | AssertMsgBreakStmt(cSeg,
|
---|
| 7796 | ("cSeg=%zu\n", cSeg),
|
---|
| 7797 | rc = VERR_INVALID_PARAMETER);
|
---|
| 7798 |
|
---|
[27808] | 7799 | rc2 = vdThreadStartRead(pDisk);
|
---|
[27232] | 7800 | AssertRC(rc2);
|
---|
[27808] | 7801 | fLockRead = true;
|
---|
[26987] | 7802 |
|
---|
[27232] | 7803 | AssertMsgBreakStmt(uOffset + cbRead <= pDisk->cbSize,
|
---|
| 7804 | ("uOffset=%llu cbRead=%zu pDisk->cbSize=%llu\n",
|
---|
| 7805 | uOffset, cbRead, pDisk->cbSize),
|
---|
| 7806 | rc = VERR_INVALID_PARAMETER);
|
---|
| 7807 |
|
---|
[28065] | 7808 | pIoCtx = vdIoCtxRootAlloc(pDisk, VDIOCTXTXDIR_READ, uOffset,
|
---|
| 7809 | cbRead, paSeg, cSeg,
|
---|
[28154] | 7810 | pfnComplete, pvUser1, pvUser2,
|
---|
[28620] | 7811 | NULL, vdReadHelperAsync);
|
---|
[27808] | 7812 | if (!pIoCtx)
|
---|
[26987] | 7813 | {
|
---|
[27808] | 7814 | rc = VERR_NO_MEMORY;
|
---|
| 7815 | break;
|
---|
[26987] | 7816 | }
|
---|
| 7817 |
|
---|
[28620] | 7818 | pIoCtx->pImage = pDisk->pLast;
|
---|
| 7819 | AssertPtrBreakStmt(pIoCtx->pImage, rc = VERR_VD_NOT_OPENED);
|
---|
[27232] | 7820 |
|
---|
[28620] | 7821 | rc = vdIoCtxProcess(pIoCtx);
|
---|
| 7822 | if (rc == VINF_VD_ASYNC_IO_FINISHED)
|
---|
| 7823 | {
|
---|
| 7824 | if (ASMAtomicCmpXchgBool(&pIoCtx->fComplete, true, false))
|
---|
| 7825 | vdIoCtxFree(pDisk, pIoCtx);
|
---|
| 7826 | else
|
---|
| 7827 | rc = VERR_VD_ASYNC_IO_IN_PROGRESS; /* Let the other handler complete the request. */
|
---|
| 7828 | }
|
---|
| 7829 | else if (rc != VERR_VD_ASYNC_IO_IN_PROGRESS) /* Another error */
|
---|
| 7830 | vdIoCtxFree(pDisk, pIoCtx);
|
---|
| 7831 |
|
---|
[26987] | 7832 | } while (0);
|
---|
| 7833 |
|
---|
[29006] | 7834 | if (RT_UNLIKELY(fLockRead) && ( rc == VINF_VD_ASYNC_IO_FINISHED
|
---|
| 7835 | || rc != VERR_VD_ASYNC_IO_IN_PROGRESS))
|
---|
[27232] | 7836 | {
|
---|
[27808] | 7837 | rc2 = vdThreadFinishRead(pDisk);
|
---|
[27232] | 7838 | AssertRC(rc2);
|
---|
| 7839 | }
|
---|
| 7840 |
|
---|
[26987] | 7841 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
| 7842 | return rc;
|
---|
| 7843 | }
|
---|
| 7844 |
|
---|
| 7845 |
|
---|
| 7846 | VBOXDDU_DECL(int) VDAsyncWrite(PVBOXHDD pDisk, uint64_t uOffset, size_t cbWrite,
|
---|
[28065] | 7847 | PCRTSGSEG paSeg, unsigned cSeg,
|
---|
[27808] | 7848 | PFNVDASYNCTRANSFERCOMPLETE pfnComplete,
|
---|
| 7849 | void *pvUser1, void *pvUser2)
|
---|
[26987] | 7850 | {
|
---|
| 7851 | int rc;
|
---|
[27232] | 7852 | int rc2;
|
---|
| 7853 | bool fLockWrite = false;
|
---|
[28066] | 7854 | PVDIOCTX pIoCtx = NULL;
|
---|
[26987] | 7855 |
|
---|
[28704] | 7856 | LogFlowFunc(("pDisk=%#p uOffset=%llu paSeg=%p cSeg=%u cbWrite=%zu pvUser1=%#p pvUser2=%#p\n",
|
---|
| 7857 | pDisk, uOffset, paSeg, cSeg, cbWrite, pvUser1, pvUser2));
|
---|
[26987] | 7858 | do
|
---|
| 7859 | {
|
---|
| 7860 | /* sanity check */
|
---|
| 7861 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
| 7862 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7863 |
|
---|
| 7864 | /* Check arguments. */
|
---|
| 7865 | AssertMsgBreakStmt(cbWrite,
|
---|
| 7866 | ("cbWrite=%zu\n", cbWrite),
|
---|
| 7867 | rc = VERR_INVALID_PARAMETER);
|
---|
| 7868 | AssertMsgBreakStmt(VALID_PTR(paSeg),
|
---|
| 7869 | ("paSeg=%#p\n", paSeg),
|
---|
| 7870 | rc = VERR_INVALID_PARAMETER);
|
---|
| 7871 | AssertMsgBreakStmt(cSeg,
|
---|
| 7872 | ("cSeg=%zu\n", cSeg),
|
---|
| 7873 | rc = VERR_INVALID_PARAMETER);
|
---|
[27977] | 7874 |
|
---|
[27232] | 7875 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 7876 | AssertRC(rc2);
|
---|
| 7877 | fLockWrite = true;
|
---|
[26987] | 7878 |
|
---|
[27232] | 7879 | AssertMsgBreakStmt(uOffset + cbWrite <= pDisk->cbSize,
|
---|
| 7880 | ("uOffset=%llu cbWrite=%zu pDisk->cbSize=%llu\n",
|
---|
| 7881 | uOffset, cbWrite, pDisk->cbSize),
|
---|
| 7882 | rc = VERR_INVALID_PARAMETER);
|
---|
| 7883 |
|
---|
[28154] | 7884 | pIoCtx = vdIoCtxRootAlloc(pDisk, VDIOCTXTXDIR_WRITE, uOffset,
|
---|
[28065] | 7885 | cbWrite, paSeg, cSeg,
|
---|
[28154] | 7886 | pfnComplete, pvUser1, pvUser2,
|
---|
[28620] | 7887 | NULL, vdWriteHelperAsync);
|
---|
[27977] | 7888 | if (!pIoCtx)
|
---|
| 7889 | {
|
---|
| 7890 | rc = VERR_NO_MEMORY;
|
---|
| 7891 | break;
|
---|
| 7892 | }
|
---|
| 7893 |
|
---|
[26987] | 7894 | PVDIMAGE pImage = pDisk->pLast;
|
---|
| 7895 | AssertPtrBreakStmt(pImage, rc = VERR_VD_NOT_OPENED);
|
---|
[28620] | 7896 | pIoCtx->pImage = pImage;
|
---|
[26987] | 7897 |
|
---|
[28620] | 7898 | rc = vdIoCtxProcess(pIoCtx);
|
---|
| 7899 | if (rc == VINF_VD_ASYNC_IO_FINISHED)
|
---|
| 7900 | {
|
---|
| 7901 | if (ASMAtomicCmpXchgBool(&pIoCtx->fComplete, true, false))
|
---|
| 7902 | vdIoCtxFree(pDisk, pIoCtx);
|
---|
| 7903 | else
|
---|
| 7904 | rc = VERR_VD_ASYNC_IO_IN_PROGRESS; /* Let the other handler complete the request. */
|
---|
| 7905 | }
|
---|
| 7906 | else if (rc != VERR_VD_ASYNC_IO_IN_PROGRESS) /* Another error */
|
---|
| 7907 | vdIoCtxFree(pDisk, pIoCtx);
|
---|
[26987] | 7908 | } while (0);
|
---|
| 7909 |
|
---|
[29006] | 7910 | if (RT_UNLIKELY(fLockWrite) && ( rc == VINF_VD_ASYNC_IO_FINISHED
|
---|
| 7911 | || rc != VERR_VD_ASYNC_IO_IN_PROGRESS))
|
---|
[27232] | 7912 | {
|
---|
| 7913 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 7914 | AssertRC(rc2);
|
---|
| 7915 | }
|
---|
[27736] | 7916 |
|
---|
[26987] | 7917 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
| 7918 | return rc;
|
---|
[28383] | 7919 | }
|
---|
[26987] | 7920 |
|
---|
[28383] | 7921 |
|
---|
| 7922 | VBOXDDU_DECL(int) VDAsyncFlush(PVBOXHDD pDisk, PFNVDASYNCTRANSFERCOMPLETE pfnComplete,
|
---|
| 7923 | void *pvUser1, void *pvUser2)
|
---|
| 7924 | {
|
---|
| 7925 | int rc;
|
---|
| 7926 | int rc2;
|
---|
| 7927 | bool fLockWrite = false;
|
---|
| 7928 | PVDIOCTX pIoCtx = NULL;
|
---|
| 7929 |
|
---|
| 7930 | LogFlowFunc(("pDisk=%#p\n", pDisk));
|
---|
| 7931 |
|
---|
| 7932 | do
|
---|
| 7933 | {
|
---|
| 7934 | /* sanity check */
|
---|
| 7935 | AssertPtrBreakStmt(pDisk, rc = VERR_INVALID_PARAMETER);
|
---|
| 7936 | AssertMsg(pDisk->u32Signature == VBOXHDDDISK_SIGNATURE, ("u32Signature=%08x\n", pDisk->u32Signature));
|
---|
| 7937 |
|
---|
| 7938 | rc2 = vdThreadStartWrite(pDisk);
|
---|
| 7939 | AssertRC(rc2);
|
---|
| 7940 | fLockWrite = true;
|
---|
| 7941 |
|
---|
| 7942 | pIoCtx = vdIoCtxRootAlloc(pDisk, VDIOCTXTXDIR_FLUSH, 0,
|
---|
| 7943 | 0, NULL, 0,
|
---|
| 7944 | pfnComplete, pvUser1, pvUser2,
|
---|
[28620] | 7945 | NULL, vdFlushHelperAsync);
|
---|
[28383] | 7946 | if (!pIoCtx)
|
---|
| 7947 | {
|
---|
| 7948 | rc = VERR_NO_MEMORY;
|
---|
| 7949 | break;
|
---|
| 7950 | }
|
---|
| 7951 |
|
---|
| 7952 | PVDIMAGE pImage = pDisk->pLast;
|
---|
| 7953 | AssertPtrBreakStmt(pImage, rc = VERR_VD_NOT_OPENED);
|
---|
[28620] | 7954 | pIoCtx->pImage = pImage;
|
---|
[28383] | 7955 |
|
---|
[28620] | 7956 | rc = vdIoCtxProcess(pIoCtx);
|
---|
[29006] | 7957 | if (rc == VINF_VD_ASYNC_IO_FINISHED)
|
---|
| 7958 | {
|
---|
| 7959 | if (ASMAtomicCmpXchgBool(&pIoCtx->fComplete, true, false))
|
---|
| 7960 | vdIoCtxFree(pDisk, pIoCtx);
|
---|
| 7961 | else
|
---|
| 7962 | rc = VERR_VD_ASYNC_IO_IN_PROGRESS; /* Let the other handler complete the request. */
|
---|
| 7963 | }
|
---|
| 7964 | else if (rc != VERR_VD_ASYNC_IO_IN_PROGRESS) /* Another error */
|
---|
| 7965 | vdIoCtxFree(pDisk, pIoCtx);
|
---|
[28383] | 7966 | } while (0);
|
---|
| 7967 |
|
---|
[29006] | 7968 | if (RT_UNLIKELY(fLockWrite) && ( rc == VINF_VD_ASYNC_IO_FINISHED
|
---|
| 7969 | || rc != VERR_VD_ASYNC_IO_IN_PROGRESS))
|
---|
[28383] | 7970 | {
|
---|
| 7971 | rc2 = vdThreadFinishWrite(pDisk);
|
---|
| 7972 | AssertRC(rc2);
|
---|
| 7973 | }
|
---|
| 7974 |
|
---|
| 7975 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
| 7976 | return rc;
|
---|
[26987] | 7977 | }
|
---|
| 7978 |
|
---|