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