windows-server-2003/base/fs/rdr2/rdbss/volinfo.c

/*++

Copyright (c) 1989  Microsoft Corporation

Module Name:

    VolInfo.c

Abstract:

    This module implements the volume information routines for Rx called by
    the dispatch driver.

Author:

    Joe Linn     [JoeLinn]    5-oct-94

Revision History:

--*/

#include "precomp.h"
#pragma hdrstop

//
//  The local debug trace level
//

#define Dbg                              (DEBUG_TRACE_VOLINFO)

#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, RxCommonQueryVolumeInformation)
#pragma alloc_text(PAGE, RxCommonSetVolumeInformation)
#endif

NTSTATUS
RxCommonQueryVolumeInformation ( 
    IN PRX_CONTEXT RxContext,
    IN PIRP Irp
    )
/*++

Routine Description:

    This is the common routine for querying volume information called by both
    the fsd and fsp threads.

Arguments:

    Irp - Supplies the Irp being processed

Return Value:

    NTSTATUS - The return status for the operation

--*/
{
    NTSTATUS Status;

    PFCB Fcb;
    PFOBX Fobx;
    PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation( Irp );

    ULONG OriginalLength = IrpSp->Parameters.QueryVolume.Length;
    FS_INFORMATION_CLASS FsInformationClass = IrpSp->Parameters.QueryVolume.FsInformationClass;
    PVOID OriginalBuffer = Irp->AssociatedIrp.SystemBuffer;

    PAGED_CODE();

    RxDecodeFileObject( IrpSp->FileObject, &Fcb, &Fobx );

    RxDbgTrace( +1, Dbg, ("RxCommonQueryVolumeInformation...IrpC %08lx, Fobx %08lx, Fcb %08lx\n",
                                       RxContext, Fobx, Fcb) );
    RxDbgTrace( 0, Dbg, ("->Length             = %08lx\n", OriginalLength) );
    RxDbgTrace( 0, Dbg, ("->FsInformationClass = %08lx\n", FsInformationClass) );
    RxDbgTrace( 0, Dbg, ("->Buffer             = %08lx\n", OriginalBuffer) );

    RxLog(( "QueryVolInfo %lx %lx %lx\n", RxContext, Fcb, Fobx ));
    RxWmiLog( LOG,
              RxCommonQueryVolumeInformation_1,
              LOGPTR(RxContext )
              LOGPTR(Fcb )
              LOGPTR(Fobx ) );
    RxLog(( "  alsoqvi %lx %lx %lx\n", OriginalLength, FsInformationClass, OriginalBuffer ));
    RxWmiLog( LOG,
              RxCommonQueryVolumeInformation_2,
              LOGULONG( OriginalLength )
              LOGULONG( FsInformationClass )
              LOGPTR( OriginalBuffer ) );

    try {
        
        RxContext->Info.FsInformationClass = FsInformationClass;
        RxContext->Info.Buffer = OriginalBuffer;
        RxContext->Info.LengthRemaining = OriginalLength;

        MINIRDR_CALL( Status,
                      RxContext,
                      Fcb->MRxDispatch,
                      MRxQueryVolumeInfo,
                      (RxContext) );

        if (RxContext->PostRequest) {
            Status = RxFsdPostRequest( RxContext );
        } else {
            Irp->IoStatus.Information = OriginalLength - RxContext->Info.LengthRemaining;
        }

    } finally {
        DebugUnwind( RxCommonQueryVolumeInformation );
    }

    RxDbgTrace( -1, Dbg, ("RxCommonQueryVolumeInformation -> %08lx,%08lx\n", Status, Irp->IoStatus.Information) );

    return Status;
}


NTSTATUS
RxCommonSetVolumeInformation ( 
    IN PRX_CONTEXT RxContext,
    IN PIRP Irp
    )
/*++

Routine Description:

    This is the common routine for setting Volume Information called by both
    the fsd and fsp threads.

Arguments:

    Irp - Supplies the Irp being processed

Return Value:

    RXSTATUS - The return status for the operation

--*/

{
    NTSTATUS Status = STATUS_NOT_IMPLEMENTED;

    PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation( Irp );

    PFCB Fcb;
    PFOBX Fobx;
    TYPE_OF_OPEN TypeOfOpen;

    ULONG Length;

    FS_INFORMATION_CLASS FsInformationClass;
    PVOID Buffer;

    PAGED_CODE();

    TypeOfOpen = RxDecodeFileObject( IrpSp->FileObject, &Fcb, &Fobx );

    RxDbgTrace( +1, Dbg, ("RxCommonSetVolumeInformation...IrpC %08lx, Fobx %08lx, Fcb %08lx\n",
                                       RxContext, Fobx, Fcb) );

    Length = IrpSp->Parameters.SetVolume.Length;
    FsInformationClass = IrpSp->Parameters.SetVolume.FsInformationClass;
    Buffer = Irp->AssociatedIrp.SystemBuffer;

    RxDbgTrace( 0, Dbg, ("->Length             = %08lx\n", Length) );
    RxDbgTrace( 0, Dbg, ("->FsInformationClass = %08lx\n", FsInformationClass) );
    RxDbgTrace( 0, Dbg, ("->Buffer             = %08lx\n", Buffer) );

    RxLog(( "SetVolInfo %lx %lx %lx\n", RxContext, Fcb, Fobx ));
    RxWmiLog( LOG,
              RxCommonSetVolumeInformation_1,
              LOGPTR( RxContext )
              LOGPTR( Fcb )
              LOGPTR( Fobx ) );
    RxLog(( "  alsosvi %lx %lx %lx\n", Length, FsInformationClass, Buffer ));
    RxWmiLog( LOG,
              RxCommonSetVolumeInformation_2,
              LOGULONG( Length )
              LOGULONG( FsInformationClass )
              LOGPTR( Buffer ) );

    try {

        //
        //  Based on the information class we'll do different actions.  Each
        //  of the procedures that we're calling performs the action if
        //  possible and returns true if it successful and false if it couldn't
        //  wait for any I/O to complete.
        //
        
        RxContext->Info.FsInformationClass = FsInformationClass;
        RxContext->Info.Buffer = Buffer;
        RxContext->Info.LengthRemaining = Length;

        MINIRDR_CALL( Status,
                      RxContext,
                      Fcb->MRxDispatch,
                      MRxSetVolumeInfo,
                      (RxContext) );

    } finally {

        DebugUnwind( RxCommonSetVolumeInformation );
        RxDbgTrace( -1, Dbg, ("RxCommonSetVolumeInformation -> %08lx\n", Status) );
    }

    return Status;
}