1777 lines
50 KiB
C
1777 lines
50 KiB
C
//+----------------------------------------------------------------------------
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//
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// Copyright (C) 1992, Microsoft Corporation
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//
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// File: fastio.c
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//
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// Contents: Routines to implement Fast IO
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//
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// Classes:
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//
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// Functions:
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//
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// History: 8/11/93 Milans created
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//
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//-----------------------------------------------------------------------------
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#include "dfsprocs.h"
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#include "fsctrl.h"
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#include "fastio.h"
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#include "fcbsup.h"
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#define Dbg (DEBUG_TRACE_FASTIO)
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BOOLEAN
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DfsFastIoCheckIfPossible (
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FILE_OBJECT *pFileObject,
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LARGE_INTEGER *pOffset,
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ULONG Length,
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BOOLEAN fWait,
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ULONG LockKey,
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BOOLEAN fCheckForRead,
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IO_STATUS_BLOCK *pIoStatusBlock,
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DEVICE_OBJECT *DeviceObject
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);
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BOOLEAN
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DfsFastIoRead(
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IN struct _FILE_OBJECT *FileObject,
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IN PLARGE_INTEGER FileOffset,
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IN ULONG Length,
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IN BOOLEAN Wait,
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IN ULONG LockKey,
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OUT PVOID Buffer,
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OUT PIO_STATUS_BLOCK IoStatus,
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DEVICE_OBJECT *DeviceObject
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);
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BOOLEAN
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DfsFastIoWrite(
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IN struct _FILE_OBJECT *FileObject,
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IN PLARGE_INTEGER FileOffset,
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IN ULONG Length,
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IN BOOLEAN Wait,
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IN ULONG LockKey,
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IN PVOID Buffer,
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OUT PIO_STATUS_BLOCK IoStatus,
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DEVICE_OBJECT *DeviceObject
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);
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BOOLEAN
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DfsFastIoQueryBasicInfo(
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IN struct _FILE_OBJECT *FileObject,
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IN BOOLEAN Wait,
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OUT PFILE_BASIC_INFORMATION Buffer,
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OUT PIO_STATUS_BLOCK IoStatus,
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DEVICE_OBJECT *DeviceObject
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);
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BOOLEAN
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DfsFastIoQueryStandardInfo(
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IN struct _FILE_OBJECT *FileObject,
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IN BOOLEAN Wait,
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OUT PFILE_STANDARD_INFORMATION Buffer,
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OUT PIO_STATUS_BLOCK IoStatus,
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DEVICE_OBJECT *DeviceObject
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);
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BOOLEAN
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DfsFastIoLock(
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IN struct _FILE_OBJECT *FileObject,
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IN PLARGE_INTEGER FileOffset,
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IN PLARGE_INTEGER Length,
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PEPROCESS ProcessId,
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ULONG Key,
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BOOLEAN FailImmediately,
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BOOLEAN ExclusiveLock,
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OUT PIO_STATUS_BLOCK IoStatus,
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DEVICE_OBJECT *DeviceObject
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);
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BOOLEAN
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DfsFastIoUnlockSingle(
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IN struct _FILE_OBJECT *FileObject,
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IN PLARGE_INTEGER FileOffset,
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IN PLARGE_INTEGER Length,
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PEPROCESS ProcessId,
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ULONG Key,
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OUT PIO_STATUS_BLOCK IoStatus,
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DEVICE_OBJECT *DeviceObject
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);
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BOOLEAN
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DfsFastIoUnlockAll(
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IN struct _FILE_OBJECT *FileObject,
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PEPROCESS ProcessId,
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OUT PIO_STATUS_BLOCK IoStatus,
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DEVICE_OBJECT *DeviceObject
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);
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BOOLEAN
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DfsFastIoUnlockAllByKey(
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IN struct _FILE_OBJECT *FileObject,
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PVOID ProcessId,
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ULONG Key,
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OUT PIO_STATUS_BLOCK IoStatus,
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DEVICE_OBJECT *DeviceObject
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);
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BOOLEAN
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DfsFastIoDeviceControl(
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IN struct _FILE_OBJECT *FileObject,
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IN BOOLEAN Wait,
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IN PVOID InputBuffer OPTIONAL,
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IN ULONG InputBufferLength,
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OUT PVOID OutputBuffer OPTIONAL,
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IN ULONG OutputBufferLength,
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IN ULONG IoControlCode,
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OUT PIO_STATUS_BLOCK IoStatus,
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DEVICE_OBJECT *DeviceObject);
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VOID
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DfsFastIoDetachDevice(
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IN PDEVICE_OBJECT SourceDevice,
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IN PDEVICE_OBJECT TargetDevice);
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BOOLEAN
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DfsFastIoQueryNetworkOpenInfo(
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IN PFILE_OBJECT FileObject,
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IN BOOLEAN Wait,
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OUT PFILE_NETWORK_OPEN_INFORMATION Buffer,
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OUT PIO_STATUS_BLOCK IoStatus,
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IN PDEVICE_OBJECT DeviceObject);
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BOOLEAN
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DfsFastIoMdlRead(
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IN PFILE_OBJECT FileObject,
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IN PLARGE_INTEGER FileOffset,
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IN ULONG Length,
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IN ULONG LockKey,
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OUT PMDL *MdlChain,
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OUT PIO_STATUS_BLOCK IoStatus,
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IN PDEVICE_OBJECT DeviceObject);
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BOOLEAN
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DfsFastIoMdlReadComplete(
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IN PFILE_OBJECT FileObject,
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IN PMDL MdlChain,
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IN PDEVICE_OBJECT DeviceObject
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);
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BOOLEAN
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DfsFastIoPrepareMdlWrite(
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IN PFILE_OBJECT FileObject,
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IN PLARGE_INTEGER FileOffset,
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IN ULONG Length,
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IN ULONG LockKey,
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OUT PMDL *MdlChain,
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OUT PIO_STATUS_BLOCK IoStatus,
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IN PDEVICE_OBJECT DeviceObject
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);
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BOOLEAN
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DfsFastIoMdlWriteComplete(
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IN PFILE_OBJECT FileObject,
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IN PLARGE_INTEGER FileOffset,
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IN PMDL MdlChain,
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IN PDEVICE_OBJECT DeviceObject
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);
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BOOLEAN
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DfsFastIoReadCompressed(
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IN PFILE_OBJECT FileObject,
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IN PLARGE_INTEGER FileOffset,
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IN ULONG Length,
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IN ULONG LockKey,
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OUT PVOID Buffer,
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OUT PMDL *MdlChain,
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OUT PIO_STATUS_BLOCK IoStatus,
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OUT struct _COMPRESSED_DATA_INFO *CompressedDataInfo,
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IN ULONG CompressedDataInfoLength,
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IN PDEVICE_OBJECT DeviceObject
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);
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BOOLEAN
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DfsFastIoWriteCompressed(
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IN PFILE_OBJECT FileObject,
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IN PLARGE_INTEGER FileOffset,
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IN ULONG Length,
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IN ULONG LockKey,
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IN PVOID Buffer,
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OUT PMDL *MdlChain,
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OUT PIO_STATUS_BLOCK IoStatus,
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IN struct _COMPRESSED_DATA_INFO *CompressedDataInfo,
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IN ULONG CompressedDataInfoLength,
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IN PDEVICE_OBJECT DeviceObject);
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BOOLEAN
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DfsFastIoMdlReadCompleteCompressed(
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IN PFILE_OBJECT FileObject,
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IN PMDL MdlChain,
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IN PDEVICE_OBJECT DeviceObject);
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BOOLEAN
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DfsFastIoMdlWriteCompleteCompressed(
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IN PFILE_OBJECT FileObject,
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IN PLARGE_INTEGER FileOffset,
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IN PMDL MdlChain,
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IN PDEVICE_OBJECT DeviceObject);
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PFAST_IO_DISPATCH
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DfsFastIoLookup(
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IN FILE_OBJECT *pFileObject,
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IN DEVICE_OBJECT *DeviceObject,
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IN PDEVICE_OBJECT *targetVdo);
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NTSTATUS
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DfsPreAcquireForSectionSynchronization(
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IN PFS_FILTER_CALLBACK_DATA Data,
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OUT PVOID *CompletionContext);
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NTSTATUS
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DfsPreReleaseForSectionSynchronization(
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IN PFS_FILTER_CALLBACK_DATA Data,
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OUT PVOID *CompletionContext);
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NTSTATUS
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DfsPreAcquireForModWrite(
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IN PFS_FILTER_CALLBACK_DATA Data,
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OUT PVOID *CompletionContext);
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NTSTATUS
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DfsPreReleaseForModWrite(
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IN PFS_FILTER_CALLBACK_DATA Data,
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OUT PVOID *CompletionContext);
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NTSTATUS
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DfsPreAcquireForCcFlush(
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IN PFS_FILTER_CALLBACK_DATA Data,
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OUT PVOID *CompletionContext);
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NTSTATUS
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DfsPreReleaseForCcFlush(
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IN PFS_FILTER_CALLBACK_DATA Data,
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OUT PVOID *CompletionContext);
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text( PAGE, DfsFastIoCheckIfPossible )
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#pragma alloc_text( PAGE, DfsFastIoRead )
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#pragma alloc_text( PAGE, DfsFastIoWrite )
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#pragma alloc_text( PAGE, DfsFastIoQueryBasicInfo )
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#pragma alloc_text( PAGE, DfsFastIoQueryStandardInfo )
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#pragma alloc_text( PAGE, DfsFastIoLock )
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#pragma alloc_text( PAGE, DfsFastIoUnlockSingle )
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#pragma alloc_text( PAGE, DfsFastIoUnlockAll )
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#pragma alloc_text( PAGE, DfsFastIoUnlockAllByKey )
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#pragma alloc_text( PAGE, DfsFastIoDeviceControl )
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#pragma alloc_text( PAGE, DfsFastIoDetachDevice )
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#pragma alloc_text( PAGE, DfsFastIoQueryNetworkOpenInfo )
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#pragma alloc_text( PAGE, DfsFastIoMdlRead )
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#pragma alloc_text( PAGE, DfsFastIoMdlReadComplete )
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#pragma alloc_text( PAGE, DfsFastIoPrepareMdlWrite )
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#pragma alloc_text( PAGE, DfsFastIoMdlWriteComplete )
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#pragma alloc_text( PAGE, DfsFastIoReadCompressed )
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#pragma alloc_text( PAGE, DfsFastIoWriteCompressed )
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#pragma alloc_text( PAGE, DfsFastIoMdlReadCompleteCompressed )
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#pragma alloc_text( PAGE, DfsFastIoMdlWriteCompleteCompressed )
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#pragma alloc_text( PAGE, DfsFastIoLookup )
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#pragma alloc_text( PAGE, DfsPreAcquireForSectionSynchronization )
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#pragma alloc_text( PAGE, DfsPreReleaseForSectionSynchronization )
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#pragma alloc_text( PAGE, DfsPreAcquireForModWrite )
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#pragma alloc_text( PAGE, DfsPreReleaseForModWrite )
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#pragma alloc_text( PAGE, DfsPreAcquireForCcFlush )
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#pragma alloc_text( PAGE, DfsPreReleaseForCcFlush )
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#endif // ALLOC_PRAGMA
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//
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// Note: We don't register the 6 Acquire/Release FastIo Dispatches here
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// because we filter this operations through the FsFilterCallback interface
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// which allows DFS to interop better with file system filters.
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//
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FAST_IO_DISPATCH FastIoDispatch =
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{
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sizeof(FAST_IO_DISPATCH),
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DfsFastIoCheckIfPossible, // CheckForFastIo
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DfsFastIoRead, // FastIoRead
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DfsFastIoWrite, // FastIoWrite
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DfsFastIoQueryBasicInfo, // FastIoQueryBasicInfo
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DfsFastIoQueryStandardInfo, // FastIoQueryStandardInfo
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DfsFastIoLock, // FastIoLock
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DfsFastIoUnlockSingle, // FastIoUnlockSingle
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DfsFastIoUnlockAll, // FastIoUnlockAll
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DfsFastIoUnlockAllByKey, // FastIoUnlockAllByKey
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NULL, // FastIoDeviceControl
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NULL, // AcquireFileForNtCreateSection
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NULL, // ReleaseFileForNtCreateSection
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DfsFastIoDetachDevice, // FastIoDetachDevice
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DfsFastIoQueryNetworkOpenInfo, // FastIoQueryNetworkOpenInfo
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NULL, // AcquireForModWrite
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DfsFastIoMdlRead, // MdlRead
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DfsFastIoMdlReadComplete, // MdlReadComplete
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DfsFastIoPrepareMdlWrite, // PrepareMdlWrite
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DfsFastIoMdlWriteComplete, // MdlWriteComplete
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DfsFastIoReadCompressed, // FastIoReadCompressed
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DfsFastIoWriteCompressed, // FastIoWriteCompressed
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DfsFastIoMdlReadCompleteCompressed, // MdlReadCompleteCompressed
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DfsFastIoMdlWriteCompleteCompressed,// MdlWriteCompleteCompressed
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NULL, // FastIoQueryOpen
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NULL, // ReleaseForModWrite
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NULL, // AcquireForCcFlush
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NULL, // ReleaseForCcFlush
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};
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//
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// NOTE: Dfs has been changed to use the FsFilter interfaces to intercept the
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// Acquire/Release calls traditionally supported via the FastIo path
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// to provide better file system filter driver support.
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//
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// By hooking these operations via the FsFilter interfaces, Dfs is able
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// to propogate the additional information provided through these
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// interfaces to file system filters as it redirects the operation to
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// a different driver stack (such as the device stack for
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// LanmanRedirector or WebDavRedirector).
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//
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// This also provides a more consistent interface for these
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// Acquire/Release operations for file system filter drivers. With Dfs
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// supporting this interface, filters will only get called through the
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// FsFilter interfaces for these operations on both local and remote
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// file systems.
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//
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FS_FILTER_CALLBACKS FsFilterCallbacks =
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{
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sizeof( FS_FILTER_CALLBACKS ),
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0,
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DfsPreAcquireForSectionSynchronization, // PreAcquireForSectionSynchronization
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NULL, // PostAcquireForSectionSynchronization
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DfsPreReleaseForSectionSynchronization, // PreReleaseForSectionSynchronization
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NULL, // PostReleaseForSectionSynchronization
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DfsPreAcquireForCcFlush, // PreAcquireForCcFlush
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NULL, // PostAcquireForCcFlush
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DfsPreReleaseForCcFlush, // PreReleaseForCcFlush
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NULL, // PostReleaseForCcFlush
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DfsPreAcquireForModWrite, // PreAcquireForModWrite
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NULL, // PostAcquireForModWrite
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DfsPreReleaseForModWrite, // PreReleaseForModWrite
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NULL // PostReleaseForModWrite
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};
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//
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// Macro to see if a PFAST_IO_DISPATCH has a particular field
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//
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#define IS_VALID_INDEX(pfio, e) \
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((pfio != NULL) && \
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(pfio->SizeOfFastIoDispatch >= \
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(offsetof(FAST_IO_DISPATCH, e) + sizeof(PVOID))) && \
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(pfio->e != NULL) \
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)
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//+----------------------------------------------------------------------------
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//
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// Function: DfsFastIoLookup
|
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//
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// Synopsis: Given a file object, this routine will locate the fast IO
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// dispatch table for the underlying provider
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//
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// Arguments:
|
||
//
|
||
// Returns:
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//
|
||
//-----------------------------------------------------------------------------
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PFAST_IO_DISPATCH
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DfsFastIoLookup(
|
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IN FILE_OBJECT *pFileObject,
|
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IN DEVICE_OBJECT *DeviceObject,
|
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OUT PDEVICE_OBJECT *targetVdo)
|
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{
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PFAST_IO_DISPATCH pFastIoTable;
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*targetVdo = NULL;
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DfsDbgTrace(+1, Dbg, "DfsFastIoLookup: Entered\n", 0);
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if (DeviceObject->DeviceType == FILE_DEVICE_DFS) {
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//
|
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// In this case we now need to do an DFS_FCB Lookup to figure out where to
|
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// go from here.
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//
|
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|
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TYPE_OF_OPEN TypeOfOpen;
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PDFS_VCB Vcb;
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PDFS_FCB Fcb;
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TypeOfOpen = DfsDecodeFileObject( pFileObject, &Vcb, &Fcb);
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DfsDbgTrace(0, Dbg, "Fcb = %08lx\n", Fcb);
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|
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if (TypeOfOpen == RedirectedFileOpen) {
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|
||
//
|
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// In this case the target device is in the Fcb itself.
|
||
//
|
||
|
||
*targetVdo = Fcb->TargetDevice;
|
||
|
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pFastIoTable = (*targetVdo)->DriverObject->FastIoDispatch;
|
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|
||
DfsDbgTrace(0,Dbg, "DfsFastIoLookup: DvObj: %08lx",DeviceObject);
|
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DfsDbgTrace(0, Dbg, "TargetVdo %08lx\n", *targetVdo);
|
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DfsDbgTrace(-1,Dbg, "DfsFastIoLookup: Exit-> %08lx\n",pFastIoTable );
|
||
|
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return(pFastIoTable);
|
||
|
||
} else {
|
||
|
||
//
|
||
// This can happen for opens against mup device, so its legal
|
||
// to return NULL here. Dont assert (bug 422334)
|
||
//
|
||
|
||
DfsDbgTrace( 0, Dbg, "DfsFastIoLookup: TypeOfOpen = %s\n",
|
||
( (TypeOfOpen == UnopenedFileObject) ? "UnopenedFileObject":
|
||
(TypeOfOpen == LogicalRootDeviceOpen) ? "LogicalRootDeviceOpen":
|
||
"???") );
|
||
|
||
DfsDbgTrace(-1,Dbg, "DfsFastIoLookup: Exit -> %08lx\n", NULL );
|
||
|
||
return(NULL);
|
||
|
||
}
|
||
|
||
} else if (DeviceObject->DeviceType == FILE_DEVICE_DFS_FILE_SYSTEM) {
|
||
|
||
DfsDbgTrace(0, Dbg, "DfsFastIoLookup: Dfs File System\n", 0);
|
||
|
||
return( NULL );
|
||
|
||
} else {
|
||
|
||
//
|
||
// This is an unknown device object type and we dont know what to do
|
||
//
|
||
|
||
DfsDbgTrace(-1,Dbg, "DfsFastIoLookup: Exit -> %08lx\n", NULL );
|
||
|
||
return(NULL);
|
||
|
||
}
|
||
|
||
}
|
||
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsFastIoCheckIfPossible
|
||
//
|
||
// Synopsis:
|
||
//
|
||
// Arguments:
|
||
//
|
||
// Returns:
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
BOOLEAN
|
||
DfsFastIoCheckIfPossible (
|
||
FILE_OBJECT *pFileObject,
|
||
LARGE_INTEGER *pOffset,
|
||
ULONG Length,
|
||
BOOLEAN fWait,
|
||
ULONG LockKey,
|
||
BOOLEAN fCheckForRead,
|
||
IO_STATUS_BLOCK *pIoStatusBlock,
|
||
PDEVICE_OBJECT DeviceObject)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoCheckIfPossible Enter \n", 0);
|
||
pFastIoTable = DfsFastIoLookup(pFileObject, DeviceObject, &targetVdo);
|
||
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, FastIoCheckIfPossible) ) {
|
||
|
||
fPossible = pFastIoTable->FastIoCheckIfPossible(
|
||
pFileObject,
|
||
pOffset,
|
||
Length,
|
||
fWait,
|
||
LockKey,
|
||
fCheckForRead,
|
||
pIoStatusBlock,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FALSE;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoCheckIfPossible Exit \n", 0);
|
||
|
||
return(fPossible);
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsFastIoRead
|
||
//
|
||
// Synopsis:
|
||
//
|
||
// Arguments:
|
||
//
|
||
// Returns:
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
BOOLEAN
|
||
DfsFastIoRead(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN PLARGE_INTEGER FileOffset,
|
||
IN ULONG Length,
|
||
IN BOOLEAN Wait,
|
||
IN ULONG LockKey,
|
||
OUT PVOID Buffer,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
PDEVICE_OBJECT DeviceObject
|
||
)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoRead Enter \n", 0);
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, FastIoRead) ) {
|
||
|
||
fPossible = pFastIoTable->FastIoRead(
|
||
FileObject,
|
||
FileOffset,
|
||
Length,
|
||
Wait,
|
||
LockKey,
|
||
Buffer,
|
||
IoStatus,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FALSE;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoRead Exit \n", 0);
|
||
|
||
return(fPossible);
|
||
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsFastIoWrite
|
||
//
|
||
// Synopsis:
|
||
//
|
||
// Arguments:
|
||
//
|
||
// Returns:
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
BOOLEAN
|
||
DfsFastIoWrite(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN PLARGE_INTEGER FileOffset,
|
||
IN ULONG Length,
|
||
IN BOOLEAN Wait,
|
||
IN ULONG LockKey,
|
||
IN PVOID Buffer,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
PDEVICE_OBJECT DeviceObject
|
||
)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoWrite Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, FastIoWrite) ) {
|
||
|
||
fPossible = pFastIoTable->FastIoWrite(
|
||
FileObject,
|
||
FileOffset,
|
||
Length,
|
||
Wait,
|
||
LockKey,
|
||
Buffer,
|
||
IoStatus,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FALSE;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoWrite Exit \n", 0);
|
||
|
||
return(fPossible);
|
||
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsFastIoQueryBasicInfo
|
||
//
|
||
// Synopsis:
|
||
//
|
||
// Arguments:
|
||
//
|
||
// Returns:
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
BOOLEAN
|
||
DfsFastIoQueryBasicInfo(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN BOOLEAN Wait,
|
||
OUT PFILE_BASIC_INFORMATION Buffer,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
PDEVICE_OBJECT DeviceObject)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoQueryBasicInfo Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, FastIoQueryBasicInfo) ) {
|
||
|
||
fPossible = pFastIoTable->FastIoQueryBasicInfo(
|
||
FileObject,
|
||
Wait,
|
||
Buffer,
|
||
IoStatus,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FALSE;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoQueryBasicInfo Exit \n", 0);
|
||
|
||
return(fPossible);
|
||
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsFastIoQueryStandardInfo
|
||
//
|
||
// Synopsis:
|
||
//
|
||
// Arguments:
|
||
//
|
||
// Returns:
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
BOOLEAN
|
||
DfsFastIoQueryStandardInfo(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN BOOLEAN Wait,
|
||
OUT PFILE_STANDARD_INFORMATION Buffer,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
PDEVICE_OBJECT DeviceObject)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoQueryStandardInfo Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, FastIoQueryStandardInfo) ) {
|
||
|
||
fPossible = pFastIoTable->FastIoQueryStandardInfo(
|
||
FileObject,
|
||
Wait,
|
||
Buffer,
|
||
IoStatus,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FALSE;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoQueryStandardInfo Exit \n", 0);
|
||
|
||
return(fPossible);
|
||
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsFastIoLock
|
||
//
|
||
// Synopsis:
|
||
//
|
||
// Arguments:
|
||
//
|
||
// Returns:
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
BOOLEAN
|
||
DfsFastIoLock(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN PLARGE_INTEGER FileOffset,
|
||
IN PLARGE_INTEGER Length,
|
||
PEPROCESS ProcessId,
|
||
ULONG Key,
|
||
BOOLEAN FailImmediately,
|
||
BOOLEAN ExclusiveLock,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
PDEVICE_OBJECT DeviceObject
|
||
)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoLock Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, FastIoLock) ) {
|
||
|
||
fPossible = pFastIoTable->FastIoLock(
|
||
FileObject,
|
||
FileOffset,
|
||
Length,
|
||
ProcessId,
|
||
Key,
|
||
FailImmediately,
|
||
ExclusiveLock,
|
||
IoStatus,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FALSE;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoLock Exit \n", 0);
|
||
|
||
return(fPossible);
|
||
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsFastIoUnlockSingle
|
||
//
|
||
// Synopsis:
|
||
//
|
||
// Arguments:
|
||
//
|
||
// Returns:
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
BOOLEAN
|
||
DfsFastIoUnlockSingle(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN PLARGE_INTEGER FileOffset,
|
||
IN PLARGE_INTEGER Length,
|
||
PEPROCESS ProcessId,
|
||
ULONG Key,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
PDEVICE_OBJECT DeviceObject)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoUnlockSingle Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, FastIoUnlockSingle) ) {
|
||
|
||
fPossible = pFastIoTable->FastIoUnlockSingle(
|
||
FileObject,
|
||
FileOffset,
|
||
Length,
|
||
ProcessId,
|
||
Key,
|
||
IoStatus,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FALSE;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoUnlockSingle Exit \n", 0);
|
||
|
||
return(fPossible);
|
||
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsFastIoUnlockAll
|
||
//
|
||
// Synopsis:
|
||
//
|
||
// Arguments:
|
||
//
|
||
// Returns:
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
BOOLEAN
|
||
DfsFastIoUnlockAll(
|
||
IN PFILE_OBJECT FileObject,
|
||
PEPROCESS ProcessId,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
PDEVICE_OBJECT DeviceObject
|
||
)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoUnlockAll Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, FastIoUnlockAll) ) {
|
||
|
||
fPossible = pFastIoTable->FastIoUnlockAll(
|
||
FileObject,
|
||
ProcessId,
|
||
IoStatus,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FALSE;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoUnlockAll Exit \n", 0);
|
||
|
||
return(fPossible);
|
||
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: FastIoUnlockAllByKey
|
||
//
|
||
// Synopsis:
|
||
//
|
||
// Arguments:
|
||
//
|
||
// Returns:
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
BOOLEAN
|
||
DfsFastIoUnlockAllByKey(
|
||
IN PFILE_OBJECT FileObject,
|
||
PVOID ProcessId,
|
||
ULONG Key,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
PDEVICE_OBJECT DeviceObject
|
||
)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoUnlockAllByKey Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, FastIoUnlockAllByKey) ) {
|
||
|
||
fPossible = pFastIoTable->FastIoUnlockAllByKey(
|
||
FileObject,
|
||
ProcessId,
|
||
Key,
|
||
IoStatus,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FALSE;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoUnlockAllByKey Exit \n", 0);
|
||
|
||
return(fPossible);
|
||
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsFastIoDeviceControl
|
||
//
|
||
// Synopsis:
|
||
//
|
||
// Arguments:
|
||
//
|
||
// Returns:
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
BOOLEAN
|
||
DfsFastIoDeviceControl(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN BOOLEAN Wait,
|
||
IN PVOID InputBuffer OPTIONAL,
|
||
IN ULONG InputBufferLength,
|
||
OUT PVOID OutputBuffer OPTIONAL,
|
||
IN ULONG OutputBufferLength,
|
||
IN ULONG IoControlCode,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
PDEVICE_OBJECT DeviceObject
|
||
)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
TYPE_OF_OPEN TypeOfOpen;
|
||
PDFS_VCB Vcb;
|
||
PDFS_FCB Fcb;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoDeviceControl Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, FastIoDeviceControl) ) {
|
||
|
||
fPossible = pFastIoTable->FastIoDeviceControl(
|
||
FileObject,
|
||
Wait,
|
||
InputBuffer,
|
||
InputBufferLength,
|
||
OutputBuffer,
|
||
OutputBufferLength,
|
||
IoControlCode,
|
||
IoStatus,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FALSE;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoDeviceControl Exit \n", 0);
|
||
|
||
return(fPossible);
|
||
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsFastIoDetachDevice, public
|
||
//
|
||
// Synopsis: This routine is a different from the rest of the fast io
|
||
// routines. It is called when a device object is being deleted,
|
||
// and that device object has an attached device. The semantics
|
||
// of this routine are "You attached to a device object that now
|
||
// needs to be deleted; please detach from the said device
|
||
// object."
|
||
//
|
||
// Arguments: [SourceDevice] -- Our device, the one that we created to
|
||
// attach ourselves to the target device.
|
||
// [TargetDevice] -- Their device, the one that we are attached
|
||
// to.
|
||
//
|
||
// Returns: Nothing - we must succeed.
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
VOID
|
||
DfsFastIoDetachDevice(
|
||
IN PDEVICE_OBJECT SourceDevice,
|
||
IN PDEVICE_OBJECT TargetDevice)
|
||
{
|
||
NOTHING;
|
||
}
|
||
|
||
BOOLEAN
|
||
DfsFastIoQueryNetworkOpenInfo(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN BOOLEAN Wait,
|
||
OUT PFILE_NETWORK_OPEN_INFORMATION Buffer,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
IN PDEVICE_OBJECT DeviceObject)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoQueryNetworkOpenInfo Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, FastIoQueryNetworkOpenInfo) ) {
|
||
|
||
fPossible = pFastIoTable->FastIoQueryNetworkOpenInfo(
|
||
FileObject,
|
||
Wait,
|
||
Buffer,
|
||
IoStatus,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FALSE;
|
||
|
||
IoStatus->Status = STATUS_NOT_SUPPORTED;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoQueryNetworkOpenInfo Exit \n", 0);
|
||
|
||
return( fPossible );
|
||
|
||
}
|
||
|
||
BOOLEAN
|
||
DfsFastIoMdlRead(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN PLARGE_INTEGER FileOffset,
|
||
IN ULONG Length,
|
||
IN ULONG LockKey,
|
||
OUT PMDL *MdlChain,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
IN PDEVICE_OBJECT DeviceObject)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoMdlRead Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, MdlRead) ) {
|
||
|
||
fPossible = pFastIoTable->MdlRead(
|
||
FileObject,
|
||
FileOffset,
|
||
Length,
|
||
LockKey,
|
||
MdlChain,
|
||
IoStatus,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FsRtlMdlReadDev(
|
||
FileObject,
|
||
FileOffset,
|
||
Length,
|
||
LockKey,
|
||
MdlChain,
|
||
IoStatus,
|
||
targetVdo);
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoMdlRead Exit \n", 0);
|
||
|
||
return( fPossible );
|
||
}
|
||
|
||
BOOLEAN
|
||
DfsFastIoMdlReadComplete(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN PMDL MdlChain,
|
||
IN PDEVICE_OBJECT DeviceObject
|
||
)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fResult;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoMdlReadComplete Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, MdlReadComplete) ) {
|
||
|
||
fResult = pFastIoTable->MdlReadComplete(
|
||
FileObject,
|
||
MdlChain,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fResult = FsRtlMdlReadCompleteDev(
|
||
FileObject,
|
||
MdlChain,
|
||
targetVdo);
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoMdlReadComplete Exit \n", 0);
|
||
|
||
return( fResult );
|
||
|
||
}
|
||
|
||
BOOLEAN
|
||
DfsFastIoPrepareMdlWrite(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN PLARGE_INTEGER FileOffset,
|
||
IN ULONG Length,
|
||
IN ULONG LockKey,
|
||
OUT PMDL *MdlChain,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
IN PDEVICE_OBJECT DeviceObject)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoPrepareMdlWrite Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, PrepareMdlWrite) ) {
|
||
|
||
fPossible = pFastIoTable->PrepareMdlWrite(
|
||
FileObject,
|
||
FileOffset,
|
||
Length,
|
||
LockKey,
|
||
MdlChain,
|
||
IoStatus,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FsRtlPrepareMdlWriteDev(
|
||
FileObject,
|
||
FileOffset,
|
||
Length,
|
||
LockKey,
|
||
MdlChain,
|
||
IoStatus,
|
||
targetVdo);
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoPrepareMdlWrite Exit \n", 0);
|
||
|
||
return( fPossible );
|
||
}
|
||
|
||
BOOLEAN
|
||
DfsFastIoMdlWriteComplete(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN PLARGE_INTEGER FileOffset,
|
||
IN PMDL MdlChain,
|
||
IN PDEVICE_OBJECT DeviceObject
|
||
)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fResult;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoMdlWriteComplete Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, MdlWriteComplete) ) {
|
||
|
||
fResult = pFastIoTable->MdlWriteComplete(
|
||
FileObject,
|
||
FileOffset,
|
||
MdlChain,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fResult = FsRtlMdlWriteCompleteDev(
|
||
FileObject,
|
||
FileOffset,
|
||
MdlChain,
|
||
targetVdo);
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoMdlWriteComplete Exit \n", 0);
|
||
|
||
return( fResult );
|
||
}
|
||
|
||
BOOLEAN
|
||
DfsFastIoReadCompressed(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN PLARGE_INTEGER FileOffset,
|
||
IN ULONG Length,
|
||
IN ULONG LockKey,
|
||
OUT PVOID Buffer,
|
||
OUT PMDL *MdlChain,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
OUT struct _COMPRESSED_DATA_INFO *CompressedDataInfo,
|
||
IN ULONG CompressedDataInfoLength,
|
||
IN PDEVICE_OBJECT DeviceObject)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoReadCompressed Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, FastIoReadCompressed) ) {
|
||
|
||
fPossible = pFastIoTable->FastIoReadCompressed(
|
||
FileObject,
|
||
FileOffset,
|
||
Length,
|
||
LockKey,
|
||
Buffer,
|
||
MdlChain,
|
||
IoStatus,
|
||
CompressedDataInfo,
|
||
CompressedDataInfoLength,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FALSE;
|
||
|
||
IoStatus->Status = STATUS_NOT_SUPPORTED;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoReadCompressed Exit \n", 0);
|
||
|
||
return( fPossible );
|
||
|
||
}
|
||
|
||
|
||
BOOLEAN
|
||
DfsFastIoWriteCompressed(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN PLARGE_INTEGER FileOffset,
|
||
IN ULONG Length,
|
||
IN ULONG LockKey,
|
||
IN PVOID Buffer,
|
||
OUT PMDL *MdlChain,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
IN struct _COMPRESSED_DATA_INFO *CompressedDataInfo,
|
||
IN ULONG CompressedDataInfoLength,
|
||
IN PDEVICE_OBJECT DeviceObject)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fPossible;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoWriteCompressed Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, FastIoWriteCompressed) ) {
|
||
|
||
fPossible = pFastIoTable->FastIoWriteCompressed(
|
||
FileObject,
|
||
FileOffset,
|
||
Length,
|
||
LockKey,
|
||
Buffer,
|
||
MdlChain,
|
||
IoStatus,
|
||
CompressedDataInfo,
|
||
CompressedDataInfoLength,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fPossible = FALSE;
|
||
|
||
IoStatus->Status = STATUS_NOT_SUPPORTED;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoWriteCompressed Exit \n", 0);
|
||
|
||
return( fPossible );
|
||
|
||
}
|
||
|
||
BOOLEAN
|
||
DfsFastIoMdlReadCompleteCompressed(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN PMDL MdlChain,
|
||
IN PDEVICE_OBJECT DeviceObject)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fResult;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoMdlReadCompleteCompressed Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, MdlReadCompleteCompressed) ) {
|
||
|
||
fResult = pFastIoTable->MdlReadCompleteCompressed(
|
||
FileObject,
|
||
MdlChain,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fResult = FALSE;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoMdlReadCompleteCompressed Exit \n", 0);
|
||
|
||
return( fResult );
|
||
}
|
||
|
||
BOOLEAN
|
||
DfsFastIoMdlWriteCompleteCompressed(
|
||
IN PFILE_OBJECT FileObject,
|
||
IN PLARGE_INTEGER FileOffset,
|
||
IN PMDL MdlChain,
|
||
IN PDEVICE_OBJECT DeviceObject)
|
||
{
|
||
PFAST_IO_DISPATCH pFastIoTable;
|
||
PDEVICE_OBJECT targetVdo;
|
||
BOOLEAN fResult;
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsFastIoMdlWriteCompleteCompressed Enter \n", 0);
|
||
|
||
pFastIoTable = DfsFastIoLookup(FileObject, DeviceObject, &targetVdo);
|
||
|
||
if ( IS_VALID_INDEX(pFastIoTable, MdlWriteCompleteCompressed) ) {
|
||
|
||
fResult = pFastIoTable->MdlWriteCompleteCompressed(
|
||
FileObject,
|
||
FileOffset,
|
||
MdlChain,
|
||
targetVdo);
|
||
|
||
} else {
|
||
|
||
fResult = FALSE;
|
||
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsFastIoMdlWriteCompleteCompressed Exit \n", 0);
|
||
|
||
return( fResult );
|
||
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsPreAcquireForSectionSynchronization
|
||
//
|
||
// Synopsis: This is the equivalent to FastIoAcquireFileForNtCreateSection.
|
||
// Dfs receives this callback through the FsFilter interfaces
|
||
// of the FsRtl package in the kernel.
|
||
//
|
||
// This is the time to do the work necessary to synchronize
|
||
// for memory-mapped section creation. If this operation
|
||
// should be redirected to an underlying FS, the parameters will
|
||
// be changed accordingly so that the operation is redirect when
|
||
// this callback returns.
|
||
//
|
||
// Arguments: [Data] -- The structure that contains the relevent parameters
|
||
// to this operation, like the FileObject and DeviceObject.
|
||
// [CompletionContext] - Provides a pointer for a context to be
|
||
// past from the pre to post operation. Since Dfs
|
||
// does not need a post operation, this parameter is not
|
||
// used.
|
||
//
|
||
// Returns: STATUS_SUCCESS
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
NTSTATUS
|
||
DfsPreAcquireForSectionSynchronization(
|
||
IN PFS_FILTER_CALLBACK_DATA Data,
|
||
OUT PVOID *CompletionContext)
|
||
{
|
||
PDEVICE_OBJECT targetVdo;
|
||
PFSRTL_COMMON_FCB_HEADER header;
|
||
PDFS_FCB pFcb;
|
||
|
||
UNREFERENCED_PARAMETER( CompletionContext );
|
||
|
||
DfsFastIoLookup( Data->FileObject, Data->DeviceObject, &targetVdo );
|
||
|
||
pFcb = DfsLookupFcb(Data->FileObject);
|
||
|
||
//
|
||
// If we've got a valid pFcb and pFcb->FileObject, we need to switch
|
||
// this operation to the other device stack and file object.
|
||
//
|
||
|
||
if (targetVdo != NULL &&
|
||
pFcb != NULL &&
|
||
pFcb->FileObject != NULL) {
|
||
|
||
IoSetTopLevelIrp( (PIRP) FSRTL_FSP_TOP_LEVEL_IRP );
|
||
|
||
Data->FileObject = pFcb->FileObject;
|
||
Data->DeviceObject = targetVdo;
|
||
|
||
} else if ((header = Data->FileObject->FsContext) && header->Resource) {
|
||
|
||
IoSetTopLevelIrp( (PIRP) FSRTL_FSP_TOP_LEVEL_IRP );
|
||
|
||
ExAcquireResourceExclusiveLite( header->Resource, TRUE );
|
||
|
||
} else {
|
||
|
||
NOTHING;
|
||
}
|
||
|
||
return STATUS_SUCCESS;
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsPreReleaseForSectionSynchronization
|
||
//
|
||
// Synopsis: This is the equivalent to FastIoReleaseFileForNtCreateSection.
|
||
// Dfs receives this callback through the FsFilter interfaces
|
||
// of the FsRtl package in the kernel.
|
||
//
|
||
// This is the time to do the work necessary to end the
|
||
// synchronization operations taken to create a memory-mapped
|
||
// section. If this operation should be redirected to an
|
||
// underlying FS, the parameters will be changed accordingly so
|
||
// that the operation is redirect when this callback returns.
|
||
//
|
||
// Arguments: [Data] -- The structure that contains the relevent parameters
|
||
// to this operation, like the FileObject and DeviceObject.
|
||
// [CompletionContext] - Provides a pointer for a context to be
|
||
// past from the pre to post operation. Since Dfs
|
||
// does not need a post operation, this parameter is not
|
||
// used.
|
||
//
|
||
// Returns: STATUS_SUCCESS
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
NTSTATUS
|
||
DfsPreReleaseForSectionSynchronization(
|
||
IN PFS_FILTER_CALLBACK_DATA Data,
|
||
OUT PVOID *CompletionContext)
|
||
{
|
||
PDEVICE_OBJECT targetVdo;
|
||
PFSRTL_COMMON_FCB_HEADER header;
|
||
PDFS_FCB pFcb;
|
||
|
||
UNREFERENCED_PARAMETER( CompletionContext );
|
||
|
||
DfsFastIoLookup( Data->FileObject, Data->DeviceObject, &targetVdo );
|
||
|
||
pFcb = DfsLookupFcb(Data->FileObject);
|
||
|
||
if (targetVdo != NULL &&
|
||
pFcb != NULL &&
|
||
pFcb->FileObject != NULL) {
|
||
|
||
IoSetTopLevelIrp( (PIRP) NULL );
|
||
Data->DeviceObject = targetVdo;
|
||
|
||
} else if ((header = Data->FileObject->FsContext) && header->Resource) {
|
||
|
||
IoSetTopLevelIrp( (PIRP) NULL );
|
||
|
||
ExReleaseResourceLite( header->Resource );
|
||
|
||
} else {
|
||
|
||
NOTHING;
|
||
}
|
||
|
||
return STATUS_SUCCESS;
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsPreAcquireForModWrite
|
||
//
|
||
// Synopsis: This is the equivalent to FastIoAcquireForModWrite.
|
||
// Dfs receives this callback through the FsFilter interfaces
|
||
// of the FsRtl package in the kernel.
|
||
//
|
||
// This is the time to do the work necessary to synchronize
|
||
// for modified page writer operations. If this operation
|
||
// should be redirected to an underlying FS, the parameters will
|
||
// be changed accordingly so that the operation is redirect when
|
||
// this callback returns.
|
||
//
|
||
// Arguments: [Data] -- The structure that contains the relevent parameters
|
||
// to this operation, like the FileObject and DeviceObject.
|
||
// [CompletionContext] - Provides a pointer for a context to be
|
||
// past from the pre to post operation. Since Dfs
|
||
// does not need a post operation, this parameter is not
|
||
// used.
|
||
//
|
||
// Returns: STATUS_SUCCESS or STATUS_INVALID_DEVICE_REQUEST for default
|
||
// behavior.
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
NTSTATUS
|
||
DfsPreAcquireForModWrite(
|
||
IN PFS_FILTER_CALLBACK_DATA Data,
|
||
OUT PVOID *CompletionContext)
|
||
{
|
||
PDEVICE_OBJECT targetVdo;
|
||
NTSTATUS status;
|
||
|
||
UNREFERENCED_PARAMETER( CompletionContext );
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsPreAcquireForModWrite Enter \n", 0);
|
||
|
||
DfsFastIoLookup(Data->FileObject, Data->DeviceObject, &targetVdo);
|
||
|
||
if (targetVdo != NULL) {
|
||
|
||
Data->DeviceObject = targetVdo;
|
||
status = STATUS_SUCCESS;
|
||
|
||
} else {
|
||
|
||
//
|
||
// The lazy write called us because we had the dispatch routine for
|
||
// AcquireFileForModWrite, but the underlying FS did not. So, we
|
||
// return this particular error so that the lazy write knows exactly
|
||
// what happened, and can take the default action.
|
||
//
|
||
|
||
status = STATUS_INVALID_DEVICE_REQUEST;
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsPreAcquireForModWrite Exit \n", 0);
|
||
|
||
return( status );
|
||
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsPreReleaseForModWrite
|
||
//
|
||
// Synopsis: This is the equivalent to FastIoReleaseForModWrite.
|
||
// Dfs receives this callback through the FsFilter interfaces
|
||
// of the FsRtl package in the kernel.
|
||
//
|
||
// This is the time to do the work necessary to end the
|
||
// synchronization operations taken to prepare for the modified
|
||
// page writer to do its work. If this operation should be
|
||
// redirected to an underlying FS, the parameters will be changed
|
||
// accordingly so that the operation is redirect when this callback
|
||
// returns.
|
||
//
|
||
// Arguments: [Data] -- The structure that contains the relevent parameters
|
||
// to this operation, like the FileObject and DeviceObject.
|
||
// [CompletionContext] - Provides a pointer for a context to be
|
||
// past from the pre to post operation. Since Dfs
|
||
// does not need a post operation, this parameter is not
|
||
// used.
|
||
//
|
||
// Returns: STATUS_SUCCESS or STATUS_INVALID_DEVICE_REQUEST for default
|
||
// actions.
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
NTSTATUS
|
||
DfsPreReleaseForModWrite(
|
||
IN PFS_FILTER_CALLBACK_DATA Data,
|
||
OUT PVOID *CompletionContext)
|
||
{
|
||
PDEVICE_OBJECT targetVdo;
|
||
NTSTATUS status;
|
||
|
||
UNREFERENCED_PARAMETER( CompletionContext );
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsPreReleaseForModWrite Enter \n", 0);
|
||
|
||
DfsFastIoLookup(Data->FileObject, Data->DeviceObject, &targetVdo);
|
||
|
||
if (targetVdo != NULL) {
|
||
|
||
Data->DeviceObject = targetVdo;
|
||
status = STATUS_SUCCESS;
|
||
|
||
} else {
|
||
|
||
|
||
//
|
||
// The lazy write called us because we had the dispatch routine for
|
||
// AcquireFileForModWrite, but the underlying FS did not. So, we
|
||
// return this particular error so that the lazy write knows exactly
|
||
// what happened, and can take the default action.
|
||
//
|
||
|
||
status = STATUS_INVALID_DEVICE_REQUEST;
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsPreReleaseForModWrite Exit \n", 0);
|
||
|
||
return( status );
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsPreAcquireForCcFlush
|
||
//
|
||
// Synopsis: This is the equivalent to FastIoAcquireForCcFlush.
|
||
// Dfs receives this callback through the FsFilter interfaces
|
||
// of the FsRtl package in the kernel.
|
||
//
|
||
// This is the time to do the work necessary to synchronize
|
||
// for a CC flush of the given file. If this operation
|
||
// should be redirected to an underlying FS, the parameters will
|
||
// be changed accordingly so that the operation is redirect when
|
||
// this callback returns.
|
||
//
|
||
// Arguments: [Data] -- The structure that contains the relevent parameters
|
||
// to this operation, like the FileObject and DeviceObject.
|
||
// [CompletionContext] - Provides a pointer for a context to be
|
||
// past from the pre to post operation. Since Dfs
|
||
// does not need a post operation, this parameter is not
|
||
// used.
|
||
//
|
||
// Returns: STATUS_SUCCESS or STATUS_INVALID_DEVICE_REQUEST for default
|
||
// actions.
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
NTSTATUS
|
||
DfsPreAcquireForCcFlush(
|
||
IN PFS_FILTER_CALLBACK_DATA Data,
|
||
OUT PVOID *CompletionContext)
|
||
{
|
||
PDEVICE_OBJECT targetVdo;
|
||
NTSTATUS status;
|
||
|
||
UNREFERENCED_PARAMETER( CompletionContext );
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsPreAcquireForCcFlush Enter \n", 0);
|
||
|
||
DfsFastIoLookup(Data->FileObject, Data->DeviceObject, &targetVdo);
|
||
|
||
if (targetVdo != NULL) {
|
||
|
||
Data->DeviceObject = targetVdo;
|
||
status = STATUS_SUCCESS;
|
||
|
||
} else {
|
||
|
||
status = STATUS_INVALID_DEVICE_REQUEST;
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsPreAcquireForCcFlush Exit \n", 0);
|
||
|
||
return( status );
|
||
}
|
||
|
||
//+----------------------------------------------------------------------------
|
||
//
|
||
// Function: DfsPreReleaseForCcFlush
|
||
//
|
||
// Synopsis: This is the equivalent to FastIoReleaseForCcFlush.
|
||
// Dfs receives this callback through the FsFilter interfaces
|
||
// of the FsRtl package in the kernel.
|
||
//
|
||
// This is the time to do the work necessary to end the
|
||
// synchronization operations taken to prepare for a CC flush
|
||
// of this file. If this operation should be redirected to an
|
||
// underlying FS, the parameters will be changed accordingly so
|
||
// that the operation is redirect when this callback returns.
|
||
//
|
||
// Arguments: [Data] -- The structure that contains the relevent parameters
|
||
// to this operation, like the FileObject and DeviceObject.
|
||
// [CompletionContext] - Provides a pointer for a context to be
|
||
// past from the pre to post operation. Since Dfs
|
||
// does not need a post operation, this parameter is not
|
||
// used.
|
||
//
|
||
// Returns: STATUS_SUCCESS or STATUS_INVALID_DEVICE_REQUEST for default
|
||
// actions.
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
|
||
NTSTATUS
|
||
DfsPreReleaseForCcFlush(
|
||
IN PFS_FILTER_CALLBACK_DATA Data,
|
||
OUT PVOID *CompletionContext)
|
||
{
|
||
PDEVICE_OBJECT targetVdo;
|
||
NTSTATUS status;
|
||
|
||
UNREFERENCED_PARAMETER( CompletionContext );
|
||
|
||
DfsDbgTrace(+1, Dbg, "DfsPreReleaseForCcFlush Enter \n", 0);
|
||
|
||
DfsFastIoLookup(Data->FileObject, Data->DeviceObject, &targetVdo);
|
||
|
||
if (targetVdo != NULL) {
|
||
|
||
Data->DeviceObject = targetVdo;
|
||
status = STATUS_SUCCESS;
|
||
|
||
} else {
|
||
|
||
status = STATUS_INVALID_DEVICE_REQUEST;
|
||
}
|
||
|
||
DfsDbgTrace(-1, Dbg, "DfsPreReleaseForCcFlush Exit \n", 0);
|
||
|
||
return( status );
|
||
}
|