downlvli.c

winddk src目录下的文件系统驱动源码压缩!

/*++

Copyright (c) 1989 - 1999 Microsoft Corporation

Module Name:

    DownLvlI.c

Abstract:

    This module implements downlevel fileinfo, volinfo, and dirctrl.

--*/

#include "precomp.h"
#pragma hdrstop

//
//  The local debug trace level
//

RXDT_DefineCategory(DOWNLVLI);
#define Dbg                 (DEBUG_TRACE_DOWNLVLI)

NTSTATUS
NulMRxTruncateFile(
    IN OUT struct _RX_CONTEXT * RxContext,
    IN OUT PLARGE_INTEGER   pNewFileSize,
    OUT PLARGE_INTEGER   pNewAllocationSize
    )
/*++

Routine Description:

   This routine handles requests to truncate the file

Arguments:

    RxContext - the RDBSS context

Return Value:

    NTSTATUS - The return status for the operation

--*/
{
    NTSTATUS Status = STATUS_SUCCESS;
    RxCaptureFcb;
    NulMRxGetFcbExtension(capFcb,pFcbExtension);
    PMRX_NET_ROOT pNetRoot = capFcb->pNetRoot;
    NulMRxGetNetRootExtension(pNetRoot,pNetRootExtension);

    RxTraceEnter("NulMRxTruncateFile");
    RxDbgTrace(0,  Dbg, ("NewFileSize is %d\n", pNewFileSize->LowPart));

    RxTraceLeave(Status);
    return Status;
}

NTSTATUS
NulMRxExtendFile(
    IN OUT struct _RX_CONTEXT * RxContext,
    IN OUT PLARGE_INTEGER   pNewFileSize,
    OUT PLARGE_INTEGER   pNewAllocationSize
    )
/*++

Routine Description:

   This routine handles requests to extend the file for cached IO.

Arguments:

    RxContext - the RDBSS context

Return Value:

    NTSTATUS - The return status for the operation

--*/
{
    NTSTATUS Status = STATUS_SUCCESS;
    RxCaptureFcb;
    NulMRxGetFcbExtension(capFcb,pFcbExtension);
    PMRX_NET_ROOT pNetRoot = capFcb->pNetRoot;
    NulMRxGetNetRootExtension(pNetRoot,pNetRootExtension);

    RxTraceEnter("NulMRxExtendFile");
    RxDbgTrace(0,  Dbg, ("NewFileSize is %d\n", pNewFileSize->LowPart));

    RxTraceLeave(Status);
    return Status;
}