NT4/private/ntos/npfs/cleanup.c

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2001-01-01 00:00:00 +01:00
/*++
Copyright (c) 1989 Microsoft Corporation
Module Name:
Cleanup.c
Abstract:
This module implements the File Cleanup routine for NPFS called by the
dispatch driver.
Author:
Gary Kimura [GaryKi] 21-Aug-1990
Revision History:
--*/
#include "NpProcs.h"
//
// The debug trace level
//
#define Dbg (DEBUG_TRACE_CLEANUP)
//
// local procedure prototypes
//
NTSTATUS
NpCommonCleanup (
IN PNPFS_DEVICE_OBJECT NpfsDeviceObject,
IN PIRP Irp
);
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, NpCommonCleanup)
#pragma alloc_text(PAGE, NpFsdCleanup)
#endif
NTSTATUS
NpFsdCleanup (
IN PNPFS_DEVICE_OBJECT NpfsDeviceObject,
IN PIRP Irp
)
/*++
Routine Description:
This routine implements the FSD part of the NtCleanupFile API calls.
Arguments:
NpfsDeviceObject - Supplies the device object to use.
Irp - Supplies the Irp being processed
Return Value:
NTSTATUS - The Fsd status for the Irp
--*/
{
NTSTATUS Status;
PAGED_CODE();
DebugTrace(+1, Dbg, "NpFsdCleanup\n", 0);
//
// Call the common Cleanup routine.
//
FsRtlEnterFileSystem();
try {
Status = NpCommonCleanup( NpfsDeviceObject, Irp );
} except(NpExceptionFilter( GetExceptionCode() )) {
//
// 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 = NpProcessException( NpfsDeviceObject, Irp, GetExceptionCode() );
}
FsRtlExitFileSystem();
//
// And return to our caller
//
DebugTrace(-1, Dbg, "NpFsdCleanup -> %08lx\n", Status );
return Status;
}
//
// Internal support routine
//
NTSTATUS
NpCommonCleanup (
IN PNPFS_DEVICE_OBJECT NpfsDeviceObject,
IN PIRP Irp
)
/*++
Routine Description:
This is the common routine for cleanup
Arguments:
Irp - Supplies the Irp to process
Return Value:
NTSTATUS - the return status for the operation
--*/
{
NTSTATUS Status;
PIO_STACK_LOCATION IrpSp;
NODE_TYPE_CODE NodeTypeCode;
PCCB Ccb;
NAMED_PIPE_END NamedPipeEnd;
PAGED_CODE();
//
// Get the current stack location
//
IrpSp = IoGetCurrentIrpStackLocation( Irp );
DebugTrace(+1, Dbg, "NpCommonCleanup...\n", 0);
DebugTrace( 0, Dbg, "Irp = %08lx\n", Irp);
//
// Now acquire exclusive access to the Vcb
//
NpAcquireExclusiveVcb();
try {
//
// Decode the file object to figure out who we are. If the result
// is null then the pipe has been disconnected.
//
if ((NodeTypeCode = NpDecodeFileObject( IrpSp->FileObject,
NULL,
&Ccb,
&NamedPipeEnd )) == NTC_UNDEFINED) {
DebugTrace(0, Dbg, "Pipe is disconnected from us\n", 0);
NpCompleteRequest( Irp, STATUS_PIPE_DISCONNECTED );
try_return( Status = STATUS_PIPE_DISCONNECTED );
}
//
// Now case on the type of file object we're closing
//
switch (NodeTypeCode) {
case NPFS_NTC_VCB:
case NPFS_NTC_ROOT_DCB:
NpCompleteRequest( Irp, STATUS_SUCCESS );
Status = STATUS_SUCCESS;
break;
case NPFS_NTC_CCB:
//
// If this is the server end of a pipe, decrement the count
// of the number of instances the server end has open.
// When this count is 0, attempts to connect to the pipe
// return OBJECT_NAME_NOT_FOUND instead of
// PIPE_NOT_AVAILABLE.
//
if ( NamedPipeEnd == FILE_PIPE_SERVER_END ) {
ASSERT( Ccb->Fcb->ServerOpenCount != 0 );
Ccb->Fcb->ServerOpenCount -= 1;
}
//
// The set closing state routines does everything to transition
// the named pipe to a closing state.
//
Status = NpSetClosingPipeState( Ccb, Irp, NamedPipeEnd );
break;
}
try_exit: NOTHING;
} finally {
NpReleaseVcb( );
}
DebugTrace(-1, Dbg, "NpCommonCleanup -> %08lx\n", Status);
return Status;
}