pnp.c File Reference

#include "fatprocs.h"

Include dependency graph for pnp.c:

Go to the source code of this file.

Macros
#define	BugCheckFileId   (FAT_BUG_CHECK_PNP)
#define	Dbg   (DEBUG_TRACE_PNP)

Functions
	_Requires_lock_held_ (_Global_critical_region_)
VOID	FatPnpAdjustVpbRefCount (IN PVCB Vcb, IN ULONG Delta)
NTSTATUS NTAPI	FatPnpCompletionRoutine (_In_ PDEVICE_OBJECT DeviceObject, _In_ PIRP Irp, _In_reads_opt_(_Inexpressible_("varies")) PVOID Contxt)

Macro Definition Documentation

BugCheckFileId

#define BugCheckFileId   (FAT_BUG_CHECK_PNP)

Definition at line 23 of file pnp.c.

Dbg

#define Dbg   (DEBUG_TRACE_PNP)

Definition at line 25 of file pnp.c.

Function Documentation

_Requires_lock_held_()

_Requires_lock_held_

(

_Global_critical_region_

)

Definition at line 27 of file pnp.c.

{
    NTSTATUS Status;
    PIRP_CONTEXT IrpContext = NULL;

    BOOLEAN TopLevel;
    BOOLEAN Wait;

    PAGED_CODE();

    DebugTrace(+1, Dbg, "FatFsdPnp\n", 0);

    FsRtlEnterFileSystem();

    TopLevel = FatIsIrpTopLevel( Irp );

    _SEH2_TRY {

        //
        //  We expect there to never be a fileobject, in which case we will always
        //  wait.  Since at the moment we don't have any concept of pending Pnp
        //  operations, this is a bit nitpicky.
        //
        
        if (IoGetCurrentIrpStackLocation( Irp )->FileObject == NULL) {

            Wait = TRUE;

        } else {

            Wait = CanFsdWait( Irp );
        }

        IrpContext = FatCreateIrpContext( Irp, Wait );

        Status = FatCommonPnp( IrpContext, Irp );

    } _SEH2_EXCEPT(FatExceptionFilter( IrpContext, _SEH2_GetExceptionInformation() )) {

        //
        //  We had some trouble trying to perform the requested
        //  operation, so we'll abort the I/O request with
        //  the error status that we get back from the
        //  execption code
        //

        Status = FatProcessException( IrpContext, Irp, _SEH2_GetExceptionCode() );
    } _SEH2_END;

    if (TopLevel) { IoSetTopLevelIrp( NULL ); }

    FsRtlExitFileSystem();

    //
    //  And return to our caller
    //

    DebugTrace(-1, Dbg, "FatFsdPnp -> %08lx\n", Status);

    UNREFERENCED_PARAMETER( VolumeDeviceObject );

    return Status;
}

FatPnpAdjustVpbRefCount()

VOID FatPnpAdjustVpbRefCount	(	IN PVCB	Vcb,
		IN ULONG	Delta
	)

Definition at line 318 of file pnp.c.

{
    KIRQL OldIrql;
    
    IoAcquireVpbSpinLock( &OldIrql);
    Vcb->Vpb->ReferenceCount += Delta;
    IoReleaseVpbSpinLock( OldIrql);
}

FatPnpCompletionRoutine()

NTSTATUS NTAPI FatPnpCompletionRoutine	(	_In_ PDEVICE_OBJECT	DeviceObject,
		_In_ PIRP	Irp,
		_In_reads_opt_(_Inexpressible_("varies")) PVOID	Contxt
	)

Definition at line 885 of file pnp.c.

{
    PKEVENT Event = (PKEVENT) Contxt;

    KeSetEvent( Event, 0, FALSE );

    return STATUS_MORE_PROCESSING_REQUIRED;

    UNREFERENCED_PARAMETER( DeviceObject );
    UNREFERENCED_PARAMETER( Contxt );
    UNREFERENCED_PARAMETER( Irp );    
}