{"id":601,"date":"2011-08-09T12:11:04","date_gmt":"2011-08-09T04:11:04","guid":{"rendered":"http:\/\/blog.dynox.cn\/?p=601"},"modified":"2011-08-10T13:31:53","modified_gmt":"2011-08-10T05:31:53","slug":"vpb%e7%9a%84%e6%9d%a5%e9%be%99%e5%8e%bb%e8%84%89%ef%bc%88%e4%b8%80%ef%bc%89","status":"publish","type":"post","link":"https:\/\/blog.dynox.cn\/?p=601","title":{"rendered":"VPB\u7684\u6765\u9f99\u53bb\u8109\uff08\u4e00\uff09"},"content":{"rendered":"

VPB\u662fWindows I\/O Manager\u5b50\u7cfb\u7edf\u7684\u4e00\u4e2a\u91cd\u8981\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5168\u79f0\u4e3a Volume Parameter Block\u3002\u5b83\u7684\u4efb\u52a1\u662f\u7ed1\u5b9a\u5377\u8bbe\u5907\uff08\u5982\u78c1\u76d8\u5206\u533a\u6216\u865a\u62df\u78c1\u76d8\uff09\u548c\u63a5\u7ba1\u6b64\u5377\u8bbe\u5907\u7684\u6587\u4ef6\u7cfb\u7edf\uff08\u5982FastFat\uff0cNTFS\uff09\u3002Windows\u7cfb\u7edf\u4e0a\u7684\u6302\u8f7d\u70b9\uff08Mount Point\uff0c\u5982\u76d8\u7b26C:\uff09\u53ea\u80fd\u5b9a\u4f4d\u81f3\u5377\u8bbe\u5907\uff08\u5982\\Device\\HarddiskVolume1\uff09\uff0cWindows Object Manager\uff08\u5bf9\u8c61\u7ba1\u7406\u5668\uff09\u5728\u89e3\u6790\u8def\u5f84\u540d\u65f6\uff08\u5373Name Parsing\u8fc7\u7a0b\uff09\u8fd8\u8981\u901a\u8fc7\u5377\u8bbe\u5907\u7684VPB\u4fe1\u606f\u8fdb\u4e00\u6b65\u5b9a\u4f4d\u81f3\u63a5\u7ba1\u6b64\u5377\u8bbe\u5907\u7684\u6587\u4ef6\u7cfb\u7edf\u9a71\u52a8\u4e0a\u3002<\/font><\/p>

\"Relationship<\/a><\/p>

\u56fe\u4e00<\/font><\/p>

VPB\u7ed3\u6784\u8bf4\u660e\uff1a<\/strong><\/font><\/p>

\u5b9a\u4e49\u4e8eWDK\u5934\u6587\u4ef6inc\\ddk\\wdm.h\u4e2d<\/font><\/p>

typedef struct _VPB {
    CSHORT Type;
    CSHORT Size;
    USHORT Flags;
    USHORT VolumeLabelLength; \/\/ in bytes
    struct _DEVICE_OBJECT *DeviceObject;
    struct _DEVICE_OBJECT *RealDevice;
    ULONG SerialNumber;
    ULONG ReferenceCount;
    WCHAR VolumeLabel[MAXIMUM_VOLUME_LABEL_LENGTH \/ sizeof(WCHAR)];
} VPB, *PVPB<\/p>

\u6210\u5458\u8bf4\u660e\uff1a<\/font><\/p>

  • Type:  \u9b54\u6570\u6807\u5fd7 IO_TYPE_VPB <\/li>
  • Size:   sizeof(VPB)
    Flags:  \u6807\u5fd7\u4f4d\uff0c\u76f8\u5173\u6807\u5fd7\u63cf\u8ff0\u5982\u4e0b\uff1a
                VPB_MOUNTED<\/strong> (1<<0):       \u6b64\u5377\u5df2\u88ab\u6587\u4ef6\u7cfb\u7edf\u8bc6\u522b\u5e76\u5df2\u6302\u8f7d
                VPB_LOCKED<\/strong> (1<<1):           \u6b64\u5377\u5df2\u88ab\u6587\u4ef6\u7cfb\u7edf\u9501\u5b9a\uff0c\u9501\u5b9a\u64cd\u4f5c\u7531\u8bf7\u6c42FSCTL_LOCK_VOLUME\u5b8c\u6210
                VPB_PERSISTENT<\/strong> (1<<2):   \u5c06VPB\u4e00\u76f4\u4fdd\u7559\u5728\u5185\u5b58\u4e2d\uff08\u4e0d\u91ca\u653e\uff09\uff0c\u5373\u4f7f\u6b64VPB\u5f15\u7528\u8ba1\u6570\u4e3a0
                VPB_REMOVE_PENDING<\/strong> (1<<3): \u8868\u793a\u6b64\u5b58\u50a8\u8bbe\u5907\u5373\u5c06\u88ab\u5378\u8f7d\/\u5220\u9664\u3002\u6b64\u6807\u5fd7\u7531Pnp Manager(\u5373\u63d2
                                                                  \u5373\u7528\u7ba1\u7406\u5668)\u7ba1\u7406\u548c\u4f7f\u7528\u3002\u6b64\u6807\u5fd7\u5728\u53ef\u5728\u5904\u7406Pnp\u8bf7\u6c42
                                                                   IRP_MN_CANCEL_REMOVE_DEVICE\u65f6\u6e05\u9664
                 VPB_RAW_MOUNT<\/strong> (1<<4): \u6307\u5b9a\u6b64\u5377\u4ec5\u7531\u7cfb\u7edfRAW\u6587\u4ef6\u7cfb\u7edf\u63a5\u7ba1 <\/li>
  • VolumeLabelLength:  \u5377\u6807\u957f\u5ea6\uff08in bytes\uff09 <\/li>
  • DeviceObject:           \u672a\u547d\u540d\u7684\u6587\u4ef6\u7cfb\u7edf\u903b\u8f91\u5377\u5bf9\u8c61\uff08unnamed logical volume\uff09 <\/li>
  • RealDevice:               \u7269\u7406\u5377\u8bbe\u5907\uff08\u5982\\Device\\HarddiskVolume1\uff09 <\/li>
  • SerialNumber:           \u5377\u5e8f\u5217\u53f7 <\/li>
  • ReferenceCount:      VPB\u7684\u5f15\u7528\u8ba1\u6570\uff0c\u7528\u4ee5\u63a7\u5236VPB\u7684\u751f\u547d\u5468\u671f <\/li>
  • VolumeLabel:             \u5377\u6807\uff0c\u6700\u957f32\u4e2a\u53cc\u5b57\u8282
                                      #define MAXIMUM_VOLUME_LABEL_LENGTH (32 * sizeof(WCHAR))

    VPB\u7684\u64cd\u4f5c\uff08\u5305\u62ec\u521d\u59cb\u5316\uff09\u662f\u7531I\/O Manager\u53ca\u6587\u4ef6\u7cfb\u7edf\u4e8c\u8005\u5171\u540c\u5b8c\u6210\u7684\uff0c\u6240\u4ee5\u591a\u5934\u7ba1\u7406\u6b63\u662fVPB\u7684\u590d\u6742\u6027\u6240\u5728\uff0c\u597d\u5728\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0cVPB\u7684\u7533\u8bf7\u548c\u91ca\u653e\u5747\u7531I\/O Manager\u5b9e\u65bd\uff0c\u6b64\u65f6VPB\u4ece\u521b\u5efa\u5230\u91ca\u653e\u7684\u751f\u547d\u5468\u671f\u4e2d\u57fa\u672c\u4e0a\u662f\u5355\u7ebf\u5f0f\u53d1\u5c55\u7684\u3002\u4f46\u5f53\u9047\u5230Force Dismount\u53caRemount\u7279\u6b8a\u60c5\u51b5\u65f6\uff0c\u6587\u4ef6\u7cfb\u7edf\u4f1a\u76f4\u63a5\u5e72\u9884VPB\u7684\u521b\u5efa\u53ca\u91ca\u653e\uff0c\u81f4\u4f7fVPB\u7684\u5355\u7ebf\u5f0f\u7684\u53d1\u5c55\u5468\u671f\u4e00\u5206\u4e3a\u4e8c\uff0c\u81f4\u4f7fVPB\u7684\u7ba1\u7406\u53d8\u5f97\u66f4\u52a0\u590d\u6742\u3002<\/font><\/p>

    \u6211\u4eec\u5148\u4ece\u6b63\u5e38\u60c5\u51b5\u5f00\u59cb\u4ecb\u7ecd\uff0c\u5148\u4ecb\u7ecd\u51e0\u4e2aVPB\u76f8\u5173\u7684\u5185\u90e8\u51fd\u6570\uff1a<\/font><\/p>

    0: kd> x nt!*Vpb*
    fffff800`01d62940 nt!IovpBuildDriverObjectList = <no type information><\/strike>
    fffff800`0189f150 nt!IopDereferenceVpbAndFree = <no type information>
    fffff800`01c54400 nt!IopCreateVpb = <no type information>
    fffff800`01968830 nt!IopReferenceVerifyVpb = <no type information>
    fffff800`01865d0c nt!IopMountInitializeVpb = <no type information>
    fffff800`01865db0 nt!IoAcquireVpbSpinLock = <no type information>
    fffff800`01af7640 nt!IopVpbSpinLock = <no type information>
    fffff800`01903ab0 nt!IopCheckVpbMounted = <no type information>
    fffff800`01865a48 nt!IopQueryVpbFlagsSafe = <no type information>
    fffff800`01c827b0 nt!HvpBuildMapAndCopy = <no type information><\/strike>
    fffff800`01865de0 nt!IoReleaseVpbSpinLock = <no type information>
    fffff800`01c82ca0 nt!HvpBuildMap = <no type information><\/strike><\/p>

    IoAcquireVpbSinLock()\u53caIoReleaseVpbSpinLock()\u4e3a\u7cfb\u7edf\u652f\u6301\u51fd\u6570\uff08kernel support routine\uff09\u3002Windows I\/O Manager\u5728\u5185\u6838\u4e2d\u7ef4\u62a4\u4e00\u4e2a\u5168\u5c40\u7684spinlock\u9501\uff0c\u4ee5\u4fdd\u62a4\u6240\u6709\u5bf9Vpb\u7ed3\u6784\u4f53\u7684\u8bbf\u95ee\u3002\u6587\u4ef6\u7cfb\u7edf\u548cI\/O Manager\u672c\u8eab\u5728\u8bbf\u95eeVpb\u65f6\u90fd\u5fc5\u987b\u8c03\u7528IoAcquireVpbSpinLock()\uff0c\u8bbf\u95ee\u7ed3\u675f\u540e\u518d\u8c03\u7528IoReleaseVpbSpinLock()\u91ca\u653e\u5168\u5c40\u81ea\u9500\u9501\u3002<\/p>

    IopCreateVpb(): \u4eceNonPagedPool\u4e2d\u7533\u8bf7VPB\uff0c\u7136\u540e\u7b80\u5355\u521d\u59cb\u5316VPB\uff08type\uff0csize\uff09\u5e76\u4e0eRealDevice\u4e00\u8d77\u7ed1\u5b9a<\/p>

    IopCheckVpbMounted(): \u68c0\u6d4bDeviceObject\u662f\u4e0d\u662f\u5df2\u7ecf\u6302\u8f7d\uff0c\u82e5\u6ca1\u6709\u5219\u4f1a\u8c03\u7528IopMountVolume\u5c1d\u8bd5\u53bb\u6302\u8f7d<\/p>

    IopMountInitializeVpb(): \u8bbe\u7f6e\u65b0\u6302\u8f7d\u5377\u8bbe\u5907\u7684Vpb\uff08\u8bbe\u7f6eVPB_MOUNTED\u6807\u8bb0\uff0c\u589e\u52a0\u5f15\u7528\u8ba1\u6570\u7b49\uff09\uff0c\u7531
                                            IopMountVolume\u6302\u8f7d\u6210\u529f\u540e\u8c03\u7528<\/p>

    IopQueryVpbFlagsSafe(): \u83b7\u53d6\u8bbe\u5907DeviceObject\u7684VPB\u7684\u6807\u5fd7\u4f4d\u4fe1\u606f\uff0c\u5373DeviceObject->Vpb->Flags\u3002\u5982
                                              \u679cDeviceObject->Vpb\u4e3aNULL\uff0c\u5219\u8fd4\u56de0\u503c\u3002\uff08\u8f83\u65b0Windows\u7248\u672c\u624d\u5f15\u5165\u7684\u51fd\u6570\uff09
    IopReferenceVerifyVpb(): \u5982\u679c\u5377\u8bbe\u5907\u5df2\u88ab\u6302\u8f7d\uff0c\u5219\u8fd4\u56de\u5176VPB\u53ca\u5bf9\u5e94\u7684\u6587\u4ef6\u7cfb\u7edf\u903b\u8f91\u5377\u8bbe\u5907\u5bf9\u8c61\uff0c\u6b64\u51fd\u6570
                                              \u589e\u52a0VPB\u7684\u5f15\u7528\u8ba1\u6570<\/p>

    IopDereferenceVpbAndFree():\u987e\u540d\u5373\u77e5\u5176\u4e49\uff0c\u6b64\u51fd\u6570\u4f1a\u51cf\u5c11VPB\u7684\u5f15\u7528\u8ba1\u6570\uff0c\u5982\u679c\u5f15\u7528\u8ba1\u6570\u5f520\u5219\u4f1a\u91ca\u653e
                                                     \u6b64VPB\u81f3NonPagedPool\u3002\uff08\u7279\u4f8bVPB_PERSISTENT\u9664\u5916\uff09<\/p>

    VPB\u7684\u521b\u5efa\u53ca\u521d\u59cb\u5316:<\/strong><\/font><\/p>

    VPB\u771f\u6b63\u662f\u7531IoCreateDevice()\u5728\u521b\u5efa\u65b0\u8bbe\u5907\u5bf9\u8c61\u65f6\u5206\u914d\u7684\uff0c\u5f53\u7136IoCreateDevice()\u662f\u8c03\u7528\u7684 IopCreateVpb()\u6765\u505a\u7684VPB\u7684\u5206\u914d\u53ca\u6700\u521d\u7684\u521d\u59cb\u5316\u3002<\/font><\/p>

    IoCreateDevice()\u4e0d\u662f\u5bf9\u6240\u6709\u7684\u8bbe\u5907\u5bf9\u8c61\u90fd\u5206\u914dVPB\uff0c\u800c\u662f\u53ea\u9488\u5bf94\u79cd\u8bbe\u5907\uff1a<\/font><\/p>

    • FILE_DEVICE_DISK (0x07) <\/li>
    • FILE_DEVICE_TAPE (0x1f) <\/li>
    • FILE_DEVICE_CD_ROM (0x02) <\/li>
    • FILE_DEVICE_VIRTUAL_DISK (0x24) <\/li> <\/ul>

      VPB\u7684\u521d\u59cb\u5316\u5e76\u4e0d\u590d\u6742\uff0c\u56e0\u4e3aVPB\u7684\u7ed3\u6784\u4f53\u5e76\u4e0d\u5e9e\u5927\uff0c\u4f46\u662f\uff0c\u5176\u521d\u59cb\u5316\u64cd\u4f5c\u76f8\u5f53\u5206\u6563\uff0c\u7531\u4e0b\u9762\u76843\u4e2a\u8fc7\u7a0b\u5171\u540c\u5b8c\u6210\uff1a<\/font><\/p>

      • IoCreateDevice()\/IopCreateVpb() <\/li>
      • IopParseDevice()\/IopCheckVpbMounted()\/IopMountVolume()\/File system IPR_MN_MOUNT_VOLUME
        handler(\u4ee5FastFat\u4e3a\u4f8b\uff1aFatMountVolume) <\/li>
      • IopParseDevice()\/IopCheckVpbMounted()\/IopMountVolume()\/IopMountInitializeVpb() <\/li> <\/ul>

        \u5177\u4f53\u6bcf\u4e00\u90e8\u5206\u90fd\u505a\u4e86\u4ec0\u4e48\u5e76\u4e0d\u96be\u53d1\u6398\uff0c\u8bfb\u8005\u4e0d\u59a8\u7528windbg\u4f5c\u4e2a\u7b80\u5355\u5b9e\u9a8c\u3002<\/font><\/p>

        \u4e0b\u9762\u4ee5FastFat (Windows 7 X64)\u4e3a\u4f8b\u4ecb\u7ecd\u4e00\u4e2a\u5df2\u52a0\u8f7d\u5377\u7684VPB\u5185\u5bb9\uff0c\u5b9e\u9a8c\u65f6\u6211\u4eec\u63d2\u5165\u4e00\u4e2aFAT32\u683c\u5f0f\u7684SD\u5361\uff0c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u6302\u8f7d\u3002\u4e0b\u9762<\/font>\u6765\u679a\u4e3eFastFat\u6587\u4ef6\u7cfb\u7edf\u961f\u5217\u4e2d\u6240\u6709\u7684\u903b\u8f91\u5377\uff1a<\/font><\/p>

        0: kd> ?? fastfat!FatData
        struct _FAT_DATA
           +0x000 NodeTypeCode     : 0x500
           +0x002 NodeByteSize     : 304
           +0x008 LazyWriteThread  : (null)
           +0x010 VcbQueue         : _LIST_ENTRY [ 0xfffffa80`047a8b68 - 0xfffffa80`047a8b68 ]<\/strong>
           +0x020 DriverObject     : 0xfffffa80`05809e70 _DRIVER_OBJECT
           +0x028 DiskFileSystemDeviceObject : 0xfffffa80`04842880
           +0x030 CdromFileSystemDeviceObject : 0xfffffa80`05bf6890
           +0x038 Resource         : _ERESOURCE
           +0x0a0 OurProcess       : 0xfffffa80`036edb30 _KPROCESS
           +0x0a8 NumberProcessors : 2
           +0x0ac ChicagoMode      : 0y1
           +0x0ac FujitsuFMR       : 0y0
           +0x0ac AsyncCloseActive : 0y0
           +0x0ac ShutdownStarted  : 0y0
           +0x0ac CodePageInvariant : 0y1
           +0x0ac HighAsync        : 0y0
           +0x0ac HighDelayed      : 0y0
           +0x0b0 AsyncCloseCount  : 0
           +0x0b8 AsyncCloseList   : _LIST_ENTRY [ 0xfffff880`070e3578 - 0xfffff880`070e3578 ]
           +0x0c8 DelayedCloseCount : 1
           +0x0d0 DelayedCloseList : _LIST_ENTRY [ 0xfffff8a0`0b4315b0 - 0xfffff8a0`0b4315b0 ]
           +0x0e0 FatCloseItem     : 0xfffffa80`057e8480 _IO_WORKITEM
           +0x0e8 GeneralSpinLock  : 0
           +0x0f0 CacheManagerCallbacks : _CACHE_MANAGER_CALLBACKS
           +0x110 CacheManagerNoOpCallbacks : _CACHE_MANAGER_CALLBACKS

        0: kd> !list "-t nt!_LIST_ENTRY.Flink -e -x \\"dd @$extret l4;  dt fastfat!_VCB @$extret-0x58\\" 0xfffffa80`047a8b68<\/strong>"
        dd @$extret l4;  dt fastfat!_VCB @$extret-0x58
        fffffa80`047a8b68  070e34d0 fffff880 070e34d0 fffff880
           +0x000 VolumeFileHeader : _FSRTL_ADVANCED_FCB_HEADER
           +0x058 VcbLinks         : _LIST_ENTRY [ 0xfffff880`070e34d0 - 0xfffff880`070e34d0 ]
           +0x068 TargetDeviceObject : 0xfffffa80`053c7040 _DEVICE_OBJECT<\/strong>
           +0x070 Vpb              : 0xfffffa80`047e8830 _VPB<\/strong>
           +0x078 VcbState         : 0x101002
           +0x07c VcbCondition     : 1 ( VcbGood )
           +0x080 RootDcb          : 0xfffffa80`0480b940 _FCB
           +0x088 NumberOfWindows  : 2
           +0x090 Windows          : 0xfffff8a0`0b4b8530 _FAT_WINDOW
           +0x098 CurrentWindow    : 0xfffff8a0`0b4b853c _FAT_WINDOW
           +0x0a0 DirectAccessOpenCount : 0
           +0x0a4 ShareAccess      : _SHARE_ACCESS
           +0x0c0 OpenFileCount    : 1
           +0x0c4 ReadOnlyCount    : 1
           +0x0c8 InternalOpenCount : 2
           +0x0cc ResidualOpenCount : 2
           +0x0d0 Bpb              : BIOS_PARAMETER_BLOCK
           +0x100 First0x24BytesOfBootSector : (null)
           +0x108 AllocationSupport : <unnamed-tag>
           +0x128 DirtyFatMcb      : _LARGE_MCB
           +0x148 BadBlockMcb      : _LARGE_MCB
           +0x168 FreeClusterBitMap : _RTL_BITMAP
           +0x178 FreeClusterBitMapMutex : _FAST_MUTEX
           +0x1b0 Resource         : _ERESOURCE
           +0x218 ChangeBitMapResource : _ERESOURCE
           +0x280 VirtualVolumeFile : 0xfffffa80`0480aa10 _FILE_OBJECT
           +0x288 SectionObjectPointers : _SECTION_OBJECT_POINTERS
           +0x2a0 ClusterHint      : 2
           +0x2a8 CurrentDevice    : 0xfffffa80`047e8cd0 _DEVICE_OBJECT
           +0x2b0 VirtualEaFile    : (null)
           +0x2b8 EaFcb            : (null)
           +0x2c0 FileObjectWithVcbLocked : (null)
           +0x2c8 DirNotifyList    : _LIST_ENTRY [ 0xfffffa80`047a8dd8 - 0xfffffa80`047a8dd8 ]
           +0x2d8 NotifySync       : 0xfffffa80`056fec30
           +0x2e0 DirectoryFileCreationMutex : _FAST_MUTEX
           +0x318 VerifyThread     : (null)
           +0x320 CleanVolumeDpc   : _KDPC
           +0x360 CleanVolumeTimer : _KTIMER
           +0x3a0 LastFatMarkVolumeDirtyCall : _LARGE_INTEGER 0x0
           +0x3a8 Statistics       : 0xfffffa80`05b5ec80 _FILE_SYSTEM_STATISTICS
           +0x3b0 Tunnel           : TUNNEL
           +0x408 ChangeCount      : 0
           +0x410 SwapVpb          : 0xfffffa80`05b5ec10 _VPB
           +0x418 AsyncCloseList   : _LIST_ENTRY [ 0xfffffa80`047a8f28 - 0xfffffa80`047a8f28 ]
           +0x428 DelayedCloseList : _LIST_ENTRY [ 0xfffff8a0`0b4315c0 - 0xfffff8a0`0b4315c0 ]
           +0x438 AdvancedFcbHeaderMutex : _FAST_MUTEX
           +0x470 CloseContext     : 0xfffff8a0`0b553a90 CLOSE_CONTEXT
           +0x478 CloseContextCount : 1<\/p>

        \u5f53\u524d\u7cfb\u7edf\u4e2d\u53ea\u6709\u4e00\u4e2aFAT32\u5377\uff0c\u5373\u6211\u4eec\u521a\u63d2\u5165\u7684SD\u5361\u3002\u4e0b\u9762\u6253\u5370\u51faVPB\u7684\u5185\u5bb9\uff1a<\/font><\/p>

        0: kd> dt _VPB 0xfffffa80`047e8830<\/strong>
        nt!_VPB
           +0x000 Type             : 10
           +0x002 Size             : 96
           +0x004 Flags            : 1
           +0x006 VolumeLabelLength : 0x10
           +0x008 DeviceObject     : 0xfffffa80`047a8970<\/strong> _DEVICE_OBJECT
           +0x010 RealDevice       : 0xfffffa80`047e8cd0<\/strong> _DEVICE_OBJECT
           +0x018 SerialNumber     : 0x51e712c6
           +0x01c ReferenceCount   : 2
           +0x020 VolumeLabel      : [32]  "CANON_DC"<\/p>

        Vpb->Flags\u663e\u793a\u5377\u662f\u5df2\u6302\u8f7d\u7684\uff0c\u5373\u6807\u5fd7\u4f4dVBP_MOUNTED\u5df2\u88ab\u8bbe\u7f6e\u3002\u4eceVpb\u5185\u5bb9\u53ef\u77e5\uff0c\u6b64SD\u5361\u7684\u5377\u6807\u4e3a"CANON_DC"\uff0c\u5b9e\u9645\u4e0a\u5b83\u5c31\u662fCANON\u76f8\u673a\u7684\u5b58\u50a8\u5361\u3002DeviceObject\uff0c\u5373\u6587\u4ef6\u7cfb\u7edf\u903b\u8f91\u5377\u8bbe\u5907\u4e3a0xfffffa80`047a8970<\/strong>\uff1bRealDevice\uff0c\u5373\u5b58\u50a8\u6808\u4e0a\u6700\u5e95\u5c42\u7684\u8bbe\u5907\u4e3a0xfffffa80`047e8cd0<\/strong>\u3002<\/font><\/p>

        0: kd> !devobj 0xfffffa80`047e8cd0
        <\/strong>Device object (fffffa80047e8cd0) is for:
        HarddiskVolume17 \\Driver\\volmgr DriverObject fffffa8004086e70
        Current Irp 00000000 RefCount 2 Type 00000007 Flags 00003050
        Vpb fffffa80047e8830<\/strong> Dacl fffff9a109ae12b0 DevExt fffffa80047e8e20 DevObjExt fffffa80047e8f88 Dope fffffa800480c840 DevNode fffffa80047e8a00
        ExtensionFlags (0000000000) 
        AttachedDevice (Upper) fffffa80047e5ac0 \\Driver\\fvevol
        Device queue is not busy.<\/p>

        0: kd> !devobj 0xfffffa80`047a8970
        <\/strong>Device object (fffffa80047a8970) is for:
          \\FileSystem\\fastfat DriverObject fffffa8005809e70
        Current Irp 00000000 RefCount 0 Type 00000008 Flags 00000000
        DevExt fffffa80047a8ac0 DevObjExt fffffa80047a8f90
        ExtensionFlags (0x00000800) 
                                     Unknown flags 0x00000800<\/p>

        0: kd> dt _DEVICE_OBJECT 0xfffffa80`047e8cd0<\/strong>
        nt!_DEVICE_OBJECT
           +0x000 Type             : 3
           +0x002 Size             : 0x2b8
           +0x004 ReferenceCount   : 2
           +0x008 DriverObject     : 0xfffffa80`04086e70 _DRIVER_OBJECT
           +0x010 NextDevice       : 0xfffffa80`045ed440 _DEVICE_OBJECT
           +0x018 AttachedDevice   : 0xfffffa80`047e5ac0 _DEVICE_OBJECT
           +0x020 CurrentIrp       : (null)
           +0x028 Timer            : (null)
           +0x030 Flags            : 0x3050
           +0x034 Characteristics  : 1
           +0x038 Vpb              : 0xfffffa80`047e8830 _VPB<\/strong>
           +0x040 DeviceExtension  : 0xfffffa80`047e8e20
           +0x048 DeviceType       : 7
           +0x04c StackSize        : 9 ''
           +0x050 Queue            : <unnamed-tag>
           +0x098 AlignmentRequirement : 0
           +0x0a0 DeviceQueue      : _KDEVICE_QUEUE
           +0x0c8 Dpc              : _KDPC
           +0x108 ActiveThreadCount : 0
           +0x110 SecurityDescriptor : 0xfffff8a0`099c1210
           +0x118 DeviceLock       : _KEVENT
           +0x130 SectorSize       : 0x200
           +0x132 Spare1           : 1
           +0x138 DeviceObjectExtension : 0xfffffa80`047e8f88 _DEVOBJ_EXTENSION
           +0x140 Reserved         : (null) <\/p>

        0: kd> dt _DEVICE_OBJECT 0xfffffa80`047a8970<\/strong>
        nt!_DEVICE_OBJECT
           +0x000 Type             : 3
           +0x002 Size             : 0x620
           +0x004 ReferenceCount   : 0
           +0x008 DriverObject     : 0xfffffa80`05809e70 _DRIVER_OBJECT
           +0x010 NextDevice       : 0xfffffa80`05bf6890 _DEVICE_OBJECT
           +0x018 AttachedDevice   : 0xfffffa80`0480ab50 _DEVICE_OBJECT
           +0x020 CurrentIrp       : (null)
           +0x028 Timer            : (null)
           +0x030 Flags            : 0
           +0x034 Characteristics  : 0
           +0x038 Vpb              : (null)
           +0x040 DeviceExtension  : 0xfffffa80`047a8ac0
           +0x048 DeviceType       : 8
           +0x04c StackSize        : 12 ''
           +0x050 Queue            : <unnamed-tag>
           +0x098 AlignmentRequirement : 0
           +0x0a0 DeviceQueue      : _KDEVICE_QUEUE
           +0x0c8 Dpc              : _KDPC
           +0x108 ActiveThreadCount : 0
           +0x110 SecurityDescriptor : (null)
           +0x118 DeviceLock       : _KEVENT
           +0x130 SectorSize       : 0x200
           +0x132 Spare1           : 1
           +0x138 DeviceObjectExtension : 0xfffffa80`047a8f90 _DEVOBJ_EXTENSION
           +0x140 Reserved         : (null) <\/p>

        Vcb->Vpb \u4e0eVcb->Vbp->RealDevice->Vpb\u662f\u4e00\u81f4\u7684\u3002\u4e0b\u9762\u518d\u6765\u7814\u7a76\u4e00\u4e0b\u5b58\u50a8\u8bbe\u5907\u6808\u7684\u6700\u4e0a\u5c42\u7684DeviceObject\uff0c\u5373Vcb->TargetDeviceObject (0xfffffa80`053c7040):<\/font><\/p>

        1: kd> !devobj 0xfffffa80`053c7040<\/strong>
        Device object (fffffa80053c7040) is for:
          \\Driver\\volsnap DriverObject fffffa80045c79b0
        Current Irp 00000000 RefCount 0 Type 00000007 Flags 00002010
        DevExt fffffa80053c7190 DevObjExt fffffa80053c7d38
        ExtensionFlags (0x00000800) 
                                     Unknown flags 0x00000800
        AttachedTo (Lower) fffffa80047e5ac0 \\Driver\\fvevol
        Device queue is not busy.
        1: kd> dt _DEVICE_OBJECT 0xfffffa80`053c7040<\/strong>
        nt!_DEVICE_OBJECT
           +0x000 Type             : 3
           +0x002 Size             : 0xcf8
           +0x004 ReferenceCount   : 0
           +0x008 DriverObject     : 0xfffffa80`045c79b0 _DRIVER_OBJECT
           +0x010 NextDevice       : 0xfffffa80`04649060 _DEVICE_OBJECT
           +0x018 AttachedDevice   : (null)
           +0x020 CurrentIrp       : (null)
           +0x028 Timer            : (null)
           +0x030 Flags            : 0x2010
           +0x034 Characteristics  : 0x101
           +0x038 Vpb              : (null) <\/strong>
           +0x040 DeviceExtension  : 0xfffffa80`053c7190
           +0x048 DeviceType       : 7<\/strong>
           +0x04c StackSize        : 11 ''
           +0x050 Queue            : <unnamed-tag>
           +0x098 AlignmentRequirement : 0
           +0x0a0 DeviceQueue      : _KDEVICE_QUEUE
           +0x0c8 Dpc              : _KDPC
           +0x108 ActiveThreadCount : 0
           +0x110 SecurityDescriptor : (null)
           +0x118 DeviceLock       : _KEVENT
           +0x130 SectorSize       : 0x200
           +0x132 Spare1           : 0
           +0x138 DeviceObjectExtension : 0xfffffa80`053c7d38 _DEVOBJ_EXTENSION
           +0x140 Reserved         : (null) <\/p>

        \u6709\u6ca1\u6709\u89c9\u5bdf\u51fa\u6709\u4ec0\u4e48\u5f02\u5e38\u72b6\u51b5\uff1fTargetDeviceObject\u7684DeviceType\u4e3aFILE_DEVICE_DISK (0x07)\uff0c\u4f46\u5b83\u7684Vpb\u9879\u5374\u662f\u7a7a\u7684\u3002\u6839\u636e\u4e0a\u9762\u5bf9IoCreateDevice\u7684\u5206\u6790\uff0c\u5bf9\u6240\u67094\u79cd\u8bbe\u5907\u7c7b\u578b\uff0c\u5728\u521b\u5efa\u8bbe\u5907\u65f6\u90fd\u4f1a\u5206\u914dVPB\uff0c\u96be\u9053\u662f\u88ab\u91ca\u653e\u4e86\uff1f<\/font><\/p>

        \u7ecf\u8fc7\u7814\u7a76\u624d\u53d1\u73b0\u5176\u4e2d\u53e6\u6709\u8e4a\u8df7\u3002TargetDeviceObject\u662f\u7531VolSnap\u521b\u5efa\u7684\uff0cVolSnap\u662fWindows Volume Shadow Copy Service\u7684\u6838\u5fc3\u7ec4\u4ef6\uff0cVolSnap\u4e3a\u6bcf\u4e2a\u5377\u8bbe\u5907\u90fd\u521b\u5efaFdo\u8bbe\u5907\u5e76\u5c06\u5176\u52a0\u5165\u8bbe\u5907\u6808\u4e2d\u3002\u4f46\u8e4a\u8df7\u7684\u5730\u65b9\u662f\uff0c\u5728\u521b\u5efa\u8bbe\u5907\u5bf9\u8c61\u65f6\uff0cVolSnap\u4f7f\u7528\u7684DeviceType\u5374\u662fFILE_DEVICE_UNKNOWN (0x22)\uff0c\u5e76\u5728\u5c06\u8bbe\u5907\u52a0\u5165\u5b58\u50a8\u8bbe\u5907\u6808\u540e\uff0c\u518d\u5c06TargetDeviceObject\u7684DeviceType\u4eceFILE_DEVICE_UNKOWN\u6539\u4e3aFILE_DEVICE_DISK\u7684\uff0c\u6240\u4ee5TargetDeviceObject\u7684Vpb\u9879\u4e3a\u7a7a\u3002<\/font><\/p>

        \u6709\u5174\u8da3\u5730\u8bdd\u53ef\u4ee5\u53cd\u6c47\u7f16\u4e00\u4e0bvolsnap!VolSnapAddDevice\u7684\u4ee3\u7801\u3002<\/font><\/p>

        \uff08to be continued\uff09<\/p> <\/li><\/div>","protected":false},"excerpt":{"rendered":"

        VPB\u662fWindows I\/O Manager\u5b50\u7cfb\u7edf\u7684\u4e00\u4e2a\u91cd\u8981\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5168\u79f0\u4e3a Volume Paramet […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[9],"tags":[279,288,287,280],"views":4505,"_links":{"self":[{"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/posts\/601"}],"collection":[{"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=601"}],"version-history":[{"count":1,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/posts\/601\/revisions"}],"predecessor-version":[{"id":602,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/posts\/601\/revisions\/602"}],"wp:attachment":[{"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=601"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=601"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}