256 lines
5 KiB
C
256 lines
5 KiB
C
/*++
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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fsddisp.c
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Abstract:
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This module implements the FSD dispatching routines for the NT datagram
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browser (the Bowser).
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Author:
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Larry Osterman (larryo) 6-May-1991
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Revision History:
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6-May-1991 larryo
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Created
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--*/
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#include "precomp.h"
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#pragma hdrstop
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//KSPIN_LOCK
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//BowserRefcountInterlock = {0};
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NTSTATUS
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BowserStopBrowser(
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IN PTRANSPORT Transport,
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IN PVOID Context
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);
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NTSTATUS
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BowserCancelRequestsOnTransport(
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IN PTRANSPORT Transport,
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IN PVOID Context
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);
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, BowserFsdCreate)
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#pragma alloc_text(PAGE, BowserFsdClose)
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#pragma alloc_text(PAGE, BowserFsdCleanup)
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#pragma alloc_text(PAGE, BowserCancelRequestsOnTransport)
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#pragma alloc_text(PAGE, BowserStopBrowser)
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#pragma alloc_text(INIT, BowserInitializeFsd)
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#endif
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NTSTATUS
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BowserFsdCreate (
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IN PBOWSER_FS_DEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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)
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/*++
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Routine Description:
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This routine processes an NtCreateFile of the NT Bowser device driver.
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Arguments:
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IN PBOWSER_FS_DEVICE_OBJECT DeviceObject - Supplies a device object for the request.
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IN PIRP Irp - Supplies an IRP for the create request.
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Return Value:
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NTSTATUS - Final Status of operation
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--*/
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{
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NTSTATUS Status = STATUS_SUCCESS;
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PAGED_CODE();
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InterlockedIncrement(&BowserNumberOfOpenFiles);
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BowserCompleteRequest(Irp, Status);
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return Status;
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UNREFERENCED_PARAMETER(DeviceObject);
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}
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NTSTATUS
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BowserFsdClose (
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IN PBOWSER_FS_DEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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)
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/*++
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Routine Description:
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This routine is called when the last reference to a handle to the NT Bowser
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device driver is removed.
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Arguments:
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IN PBOWSER_FS_DEVICE_OBJECT DeviceObject - Supplies a device object for the request.
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IN PIRP Irp - Supplies an IRP for the create request.
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Return Value:
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NTSTATUS - Final Status of operation
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--*/
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{
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NTSTATUS Status = STATUS_SUCCESS;
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PAGED_CODE();
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BowserCompleteRequest(Irp, Status);
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return Status;
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UNREFERENCED_PARAMETER(DeviceObject);
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}
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NTSTATUS
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BowserFsdCleanup (
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IN PBOWSER_FS_DEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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)
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/*++
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Routine Description:
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This routine is called when the last handle to the NT Bowser device
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driver is closed.
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Arguments:
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IN PBOWSER_FS_DEVICE_OBJECT DeviceObject - Supplies a device object for the request.
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IN PIRP Irp - Supplies an IRP for the create request.
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Return Value:
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NTSTATUS - Final Status of operation
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--*/
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{
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NTSTATUS Status = STATUS_SUCCESS;
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PAGED_CODE();
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FsRtlEnterFileSystem();
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BowserForEachTransport(BowserCancelRequestsOnTransport, Irp->Tail.Overlay.OriginalFileObject);
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if (InterlockedDecrement(&BowserNumberOfOpenFiles) == 0) {
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//
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// There are no longer any handles open to the browser.
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//
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// Make sure we aren't a browser on any of our networks now.
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//
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BowserForEachTransport(BowserStopBrowser, NULL);
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}
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FsRtlExitFileSystem();
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BowserCompleteRequest(Irp, Status);
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return Status;
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UNREFERENCED_PARAMETER(DeviceObject);
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}
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NTSTATUS
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BowserCancelRequestsOnTransport(
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IN PTRANSPORT Transport,
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IN PVOID Context
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)
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{
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PFILE_OBJECT FileObject = Context;
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PAGED_CODE();
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BowserCancelQueuedIoForFile(&Transport->BecomeBackupQueue, FileObject);
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BowserCancelQueuedIoForFile(&Transport->BecomeMasterQueue, FileObject);
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BowserCancelQueuedIoForFile(&Transport->FindMasterQueue, FileObject);
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BowserCancelQueuedIoForFile(&Transport->WaitForMasterAnnounceQueue, FileObject);
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BowserCancelQueuedIoForFile(&Transport->ChangeRoleQueue, FileObject);
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BowserCancelQueuedIoForFile(&Transport->WaitForNewMasterNameQueue, FileObject);
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return STATUS_SUCCESS;
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}
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NTSTATUS
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BowserStopBrowser(
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IN PTRANSPORT Transport,
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IN PVOID Context
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)
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{
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PPAGED_TRANSPORT PagedTransport = Transport->PagedTransport;
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PAGED_CODE();
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LOCK_TRANSPORT(Transport);
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//
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// Make sure that we cannot possibly participate in an election.
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//
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PagedTransport->Role = None;
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PagedTransport->ServiceStatus &= ~(SV_TYPE_BACKUP_BROWSER | SV_TYPE_MASTER_BROWSER | SV_TYPE_POTENTIAL_BROWSER);
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BowserForEachTransportName(Transport, BowserStopProcessingAnnouncements, NULL);
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BowserStopTimer(&Transport->ElectionTimer);
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BowserStopTimer(&Transport->FindMasterTimer);
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UNLOCK_TRANSPORT(Transport);
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//
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// Delete the names associated with being a browser.
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//
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BowserDeleteTransportNameByName(Transport,
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NULL,
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MasterBrowser);
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BowserDeleteTransportNameByName(Transport,
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NULL,
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DomainAnnouncement);
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BowserDeleteTransportNameByName(Transport,
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NULL,
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BrowserElection);
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return(STATUS_SUCCESS);
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}
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VOID
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BowserInitializeFsd(
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VOID
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)
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{
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// KeInitializeSpinLock(&BowserRefcountInterlock);
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}
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