Leaked source code of windows server 2003
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/*++
Copyright (c) 1989-2000 Microsoft Corporation
Module Name:
DevCtrl.c
Abstract:
This module implements the File System Device Control routines for Cdfs
called by the dispatch driver.
// @@BEGIN_DDKSPLIT
Author:
Brian Andrew [BrianAn] 04-Mar-1991
Revision History:
// @@END_DDKSPLIT
--*/
#include "CdProcs.h"
//
// The Bug check file id for this module
//
#define BugCheckFileId (CDFS_BUG_CHECK_DEVCTRL)
//
// Local support routines
//
NTSTATUS
CdDevCtrlCompletionRoutine (
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Contxt
);
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, CdCommonDevControl)
#endif
NTSTATUS
CdCommonDevControl (
IN PIRP_CONTEXT IrpContext,
IN PIRP Irp
)
/*++
Routine Description:
Arguments:
Return Value:
--*/
{
NTSTATUS Status;
TYPE_OF_OPEN TypeOfOpen;
PFCB Fcb;
PCCB Ccb;
PIO_STACK_LOCATION IrpSp;
PIO_STACK_LOCATION NextIrpSp;
PVOID TargetBuffer = NULL;
PAGED_CODE();
//
// Extract and decode the file object.
//
IrpSp = IoGetCurrentIrpStackLocation( Irp );
TypeOfOpen = CdDecodeFileObject( IrpContext,
IrpSp->FileObject,
&Fcb,
&Ccb );
//
// The only type of opens we accept are user volume opens.
//
if (TypeOfOpen != UserVolumeOpen) {
CdCompleteRequest( IrpContext, Irp, STATUS_INVALID_PARAMETER );
return STATUS_INVALID_PARAMETER;
}
if (IrpSp->Parameters.DeviceIoControl.IoControlCode == IOCTL_CDROM_READ_TOC) {
//
// Verify the Vcb in this case to detect if the volume has changed.
//
CdVerifyVcb( IrpContext, Fcb->Vcb );
//
// Handle the case of the disk type ourselves.
//
} else if (IrpSp->Parameters.DeviceIoControl.IoControlCode == IOCTL_CDROM_DISK_TYPE) {
//
// Verify the Vcb in this case to detect if the volume has changed.
//
CdVerifyVcb( IrpContext, Fcb->Vcb );
//
// Check the size of the output buffer.
//
if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength < sizeof( CDROM_DISK_DATA )) {
CdCompleteRequest( IrpContext, Irp, STATUS_BUFFER_TOO_SMALL );
return STATUS_BUFFER_TOO_SMALL;
}
//
// Copy the data from the Vcb.
//
((PCDROM_DISK_DATA) Irp->AssociatedIrp.SystemBuffer)->DiskData = Fcb->Vcb->DiskFlags;
Irp->IoStatus.Information = sizeof( CDROM_DISK_DATA );
CdCompleteRequest( IrpContext, Irp, STATUS_SUCCESS );
return STATUS_SUCCESS;
}
//
// Get the next stack location, and copy over the stack parameter
// information.
//
NextIrpSp = IoGetNextIrpStackLocation( Irp );
*NextIrpSp = *IrpSp;
//
// Set up the completion routine
//
IoSetCompletionRoutine( Irp,
CdDevCtrlCompletionRoutine,
NULL,
TRUE,
TRUE,
TRUE );
//
// Send the request.
//
Status = IoCallDriver( IrpContext->Vcb->TargetDeviceObject, Irp );
//
// Cleanup our Irp Context. The driver has completed the Irp.
//
CdCompleteRequest( IrpContext, NULL, STATUS_SUCCESS );
return Status;
}
//
// Local support routine
//
NTSTATUS
CdDevCtrlCompletionRoutine (
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Contxt
)
{
//
// Add the hack-o-ramma to fix formats.
//
if (Irp->PendingReturned) {
IoMarkIrpPending( Irp );
}
return STATUS_SUCCESS;
UNREFERENCED_PARAMETER( DeviceObject );
UNREFERENCED_PARAMETER( Contxt );
}