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/*++
Copyright (c) 1989 Microsoft Corporation
Module Name:
msinit.c
Abstract:
This module implements the DRIVER_INITIALIZATION routine for the
mailslot file system.
Author:
Manny Weiser (mannyw) 7-Jan-91
Revision History:
--*/
#include "mailslot.h"
//#include <zwapi.h>
NTSTATUS
DriverEntry(
IN PDRIVER_OBJECT DriverObject,
IN PUNICODE_STRING RegistryPath
);
#ifdef ALLOC_PRAGMA
#pragma alloc_text( PAGE, DriverEntry )
#endif
NTSTATUS
DriverEntry(
IN PDRIVER_OBJECT DriverObject,
IN PUNICODE_STRING RegistryPath
)
/*++
Routine Description:
This is the initialization routine for the mailslot file system
device driver. This routine creates the device object for the mailslot
device and performs all other driver initialization.
Arguments:
DriverObject - Pointer to driver object created by the system.
Return Value:
NTSTATUS - The function value is the final status from the initialization
operation.
--*/
{
NTSTATUS status = STATUS_SUCCESS;
UNICODE_STRING nameString;
PDEVICE_OBJECT deviceObject;
PMSFS_DEVICE_OBJECT msfsDeviceObject;
BOOLEAN vcbInitialized;
PAGED_CODE();
//
// Initialize MSFS global data.
//
MsInitializeData();
//
// Set driver to be completely paged out.
//
MmPageEntireDriver(DriverEntry);
//
// Create the MSFS device object.
//
RtlInitUnicodeString( &nameString, L"\\Device\\Mailslot" );
status = IoCreateDevice( DriverObject,
sizeof(MSFS_DEVICE_OBJECT)-sizeof(DEVICE_OBJECT),
&nameString,
FILE_DEVICE_MAILSLOT,
0,
FALSE,
&deviceObject );
if (!NT_SUCCESS( status )) {
return status;
}
//
// Now because we use the irp stack for storing a data entry we need
// to bump up the stack size in the device object we just created.
//
deviceObject->StackSize += 1;
//
// Note that because of the way data copying is done, we set neither
// the Direct I/O or Buffered I/O bit in DeviceObject->Flags. If
// data is not buffered we may set up for Direct I/O by hand.
//
//
// Initialize the driver object with this driver's entry points.
//
DriverObject->MajorFunction[IRP_MJ_CREATE] =
(PDRIVER_DISPATCH)MsFsdCreate;
DriverObject->MajorFunction[IRP_MJ_CREATE_MAILSLOT] =
(PDRIVER_DISPATCH)MsFsdCreateMailslot;
DriverObject->MajorFunction[IRP_MJ_CLOSE] =
(PDRIVER_DISPATCH)MsFsdClose;
DriverObject->MajorFunction[IRP_MJ_READ] =
(PDRIVER_DISPATCH)MsFsdRead;
DriverObject->MajorFunction[IRP_MJ_WRITE] =
(PDRIVER_DISPATCH)MsFsdWrite;
DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] =
(PDRIVER_DISPATCH)MsFsdQueryInformation;
DriverObject->MajorFunction[IRP_MJ_SET_INFORMATION] =
(PDRIVER_DISPATCH)MsFsdSetInformation;
DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] =
(PDRIVER_DISPATCH)MsFsdQueryVolumeInformation;
DriverObject->MajorFunction[IRP_MJ_CLEANUP] =
(PDRIVER_DISPATCH)MsFsdCleanup;
DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] =
(PDRIVER_DISPATCH)MsFsdDirectoryControl;
DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] =
(PDRIVER_DISPATCH)MsFsdFsControl;
DriverObject->MajorFunction[IRP_MJ_QUERY_SECURITY] =
(PDRIVER_DISPATCH)MsFsdQuerySecurityInfo;
DriverObject->MajorFunction[IRP_MJ_SET_SECURITY] =
(PDRIVER_DISPATCH)MsFsdSetSecurityInfo;
#ifdef _PNP_POWER_
//
// Mailslots should probably have a SetPower handler to ensure
// that the driver is not powered down while a guarateed
// mailslot delivery is in progress. For now, we'll just
// ignore this and let the machine set power.
//
deviceObject->DeviceObjectExtension->PowerControlNeeded = FALSE;
#endif
vcbInitialized = FALSE;
try {
//
// Initialize stuff
//
msfsDeviceObject = (PMSFS_DEVICE_OBJECT)deviceObject;
//
// Now initialize the Vcb, and create the root dcb
//
MsInitializeVcb( &msfsDeviceObject->Vcb );
(VOID)MsCreateRootDcb( &msfsDeviceObject->Vcb );
vcbInitialized = TRUE;
} finally {
if (AbnormalTermination() ) {
//
// We encountered some unrecoverable error while initializing.
// Cleanup as necessary.
//
if (vcbInitialized) {
MsDeleteVcb( &msfsDeviceObject->Vcb );
}
}
}
//
// Return to the caller.
//
return( status );
}
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