devctrl.c File Reference

#include "UdfProcs.h"

Go to the source code of this file.

Defines
#define	BugCheckFileId   (UDFS_BUG_CHECK_DEVCTRL)
#define	Dbg   (UDFS_DEBUG_LEVEL_DEVCTRL)
Functions
NTSTATUS	UdfDvdReadStructure (IN PIRP_CONTEXT IrpContext, IN PIRP Irp, IN PFCB Fcb)
NTSTATUS	UdfDvdTransferKey (IN PIRP_CONTEXT IrpContext, IN PIRP Irp, IN PFCB Fcb)
NTSTATUS	UdfDevCtrlCompletionRoutine (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp, IN PVOID Contxt)
NTSTATUS	UdfCommonDevControl (IN PIRP_CONTEXT IrpContext, IN PIRP Irp)

---

Define Documentation

#define BugCheckFileId   (UDFS_BUG_CHECK_DEVCTRL)

Definition at line 28 of file udfs/devctrl.c.

#define Dbg   (UDFS_DEBUG_LEVEL_DEVCTRL)

Definition at line 34 of file udfs/devctrl.c.

---

Function Documentation

NTSTATUS UdfCommonDevControl (  IN PIRP_CONTEXT  IrpContext, IN PIRP  Irp )

Definition at line 69 of file udfs/devctrl.c. References _IRP::AssociatedIrp, _IO_STACK_LOCATION::FileObject, IoCallDriver, IoCopyCurrentIrpStackLocationToNext, IoGetCurrentIrpStackLocation, IoSetCompletionRoutine, _IRP::IoStatus, Irp, NTSTATUS(), NULL, PAGED_CODE, _IO_STACK_LOCATION::Parameters, Status, TRUE, TYPE_OF_OPEN, UdfCompleteRequest(), UdfDecodeFileObject(), UdfDevCtrlCompletionRoutine(), UdfDvdReadStructure(), UdfDvdTransferKey(), UdfVerifyVcb(), UserFileOpen, UserVolumeOpen, and _FCB::Vcb. Referenced by UdfFsdDispatch(), and UdfFspDispatch(). : This is the common routine for doing Device control operations called by both the fsd and fsp threads Arguments: Irp - Supplies the Irp to process Return Value: NTSTATUS - The return status for the operation --*/ { NTSTATUS Status; TYPE_OF_OPEN TypeOfOpen; PFCB Fcb; PCCB Ccb; PIO_STACK_LOCATION IrpSp; PVOID TargetBuffer; PAGED_CODE(); // // Extract and decode the file object. // IrpSp = IoGetCurrentIrpStackLocation( Irp ); TypeOfOpen = UdfDecodeFileObject( IrpSp->FileObject, &Fcb, &Ccb ); // // A few IOCTLs actually require some intervention on our part to // translate some information from file-based to device-based units. // if (TypeOfOpen == UserFileOpen) { switch (IrpSp->Parameters.DeviceIoControl.IoControlCode) { case IOCTL_DVD_READ_KEY: case IOCTL_DVD_SEND_KEY: Status = UdfDvdTransferKey( IrpContext, Irp, Fcb ); break; case IOCTL_DVD_READ_STRUCTURE: Status = UdfDvdReadStructure( IrpContext, Irp, Fcb ); break; case IOCTL_STORAGE_SET_READ_AHEAD: // // We're just going to no-op this for now. // Status = STATUS_SUCCESS; UdfCompleteRequest( IrpContext, Irp, Status ); break; default: Status = STATUS_INVALID_PARAMETER; UdfCompleteRequest( IrpContext, Irp, Status ); break; } return Status; } // // Now the only type of opens we accept are user volume opens. // if (TypeOfOpen != UserVolumeOpen) { UdfCompleteRequest( IrpContext, Irp, STATUS_INVALID_PARAMETER ); return STATUS_INVALID_PARAMETER; } // // Handle the case of the disk type ourselves. We're really just going to // lie about this, but it is a good lie. // if (IrpSp->Parameters.DeviceIoControl.IoControlCode == IOCTL_CDROM_DISK_TYPE) { // // Verify the Vcb in this case to detect if the volume has changed. // UdfVerifyVcb( IrpContext, Fcb->Vcb ); // // Check the size of the output buffer. // if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength < sizeof( CDROM_DISK_DATA )) { UdfCompleteRequest( IrpContext, Irp, STATUS_BUFFER_TOO_SMALL ); return STATUS_BUFFER_TOO_SMALL; } // // Copy the data from the Vcb. // ((PCDROM_DISK_DATA) Irp->AssociatedIrp.SystemBuffer)->DiskData = CDROM_DISK_DATA_TRACK; Irp->IoStatus.Information = sizeof( CDROM_DISK_DATA ); UdfCompleteRequest( IrpContext, Irp, STATUS_SUCCESS ); return STATUS_SUCCESS; } // // Copy the arguments and set up the completion routine // IoCopyCurrentIrpStackLocationToNext( Irp ); IoSetCompletionRoutine( Irp, UdfDevCtrlCompletionRoutine, NULL, TRUE, TRUE, TRUE ); // // Send the request. // Status = IoCallDriver( IrpContext->Vcb->TargetDeviceObject, Irp ); // // Cleanup our Irp Context. The driver has completed the Irp. // UdfCompleteRequest( IrpContext, NULL, STATUS_SUCCESS ); return Status; }

NTSTATUS UdfDevCtrlCompletionRoutine (  IN PDEVICE_OBJECT  DeviceObject, IN PIRP  Irp, IN PVOID  Contxt )

Definition at line 451 of file udfs/devctrl.c. References IoMarkIrpPending, Irp, and _IRP::PendingReturned. Referenced by UdfCommonDevControl(), UdfDvdReadStructure(), and UdfDvdTransferKey(). { // // Add the hack-o-ramma to fix formats. // if (Irp->PendingReturned) { IoMarkIrpPending( Irp ); } return STATUS_SUCCESS; UNREFERENCED_PARAMETER( DeviceObject ); UNREFERENCED_PARAMETER( Contxt ); }

NTSTATUS UdfDvdReadStructure (  IN PIRP_CONTEXT  IrpContext, IN PIRP  Irp, IN PFCB  Fcb )

Definition at line 337 of file udfs/devctrl.c. References _IRP::AssociatedIrp, FsRtlLookupLargeMcbEntry(), IoCallDriver, IoCopyCurrentIrpStackLocationToNext, IoGetCurrentIrpStackLocation, IoSetCompletionRoutine, Irp, LlBytesFromSectors, LlSectorsFromBytes, NTSTATUS(), NULL, Offset, _IO_STACK_LOCATION::Parameters, Status, TRUE, UdfCompleteRequest(), and UdfDevCtrlCompletionRoutine(). Referenced by UdfCommonDevControl(). : This routine handles the special form of the Dvd structure reading IOCTLs performed in the context of a file. For these IOCTLs, the incoming parameter is in file-relative form, which must be translated to a device-relatvie form before it can continue. Arguments: Irp - Supplies the Irp to process Fcb - Supplies the file being operated with Return Value: NTSTATUS - The return status for the operation --*/ { NTSTATUS Status = STATUS_INVALID_PARAMETER; PDVD_READ_STRUCTURE ReadStructure; LARGE_INTEGER Offset; BOOLEAN Result; PIO_STACK_LOCATION IrpSp; // // Grab the input buffer and confirm basic validity. // IrpSp = IoGetCurrentIrpStackLocation( Irp ); ReadStructure = (PDVD_READ_STRUCTURE) Irp->AssociatedIrp.SystemBuffer; if (IrpSp->Parameters.DeviceIoControl.InputBufferLength != sizeof(DVD_READ_STRUCTURE)) { UdfCompleteRequest( IrpContext, Irp, Status ); return Status; } // // Now, convert the file byte offset in the structure to a physical sector. // Result = FsRtlLookupLargeMcbEntry( &Fcb->Mcb, LlSectorsFromBytes( Fcb->Vcb, ReadStructure->BlockByteOffset.QuadPart ), &Offset.QuadPart, NULL, NULL, NULL, NULL ); // // If we failed the lookup, we know that this must be some form of unrecorded // extent on the media. This IOCTL is ill-defined at this point, so we have // to give up. // if (!Result || Offset.QuadPart == -1) { UdfCompleteRequest( IrpContext, Irp, Status ); return Status; } // // The input is buffered from user space, so we know we can just rewrite it. // ReadStructure->BlockByteOffset.QuadPart = LlBytesFromSectors( Fcb->Vcb, Offset.QuadPart ); // // Copy the arguments and set up the completion routine // IoCopyCurrentIrpStackLocationToNext( Irp ); IoSetCompletionRoutine( Irp, UdfDevCtrlCompletionRoutine, NULL, TRUE, TRUE, TRUE ); // // Send the request. // Status = IoCallDriver( IrpContext->Vcb->TargetDeviceObject, Irp ); // // Cleanup our Irp Context. The driver has completed the Irp. // UdfCompleteRequest( IrpContext, NULL, STATUS_SUCCESS ); return Status; }

NTSTATUS UdfDvdTransferKey (  IN PIRP_CONTEXT  IrpContext, IN PIRP  Irp, IN PFCB  Fcb )

Definition at line 227 of file udfs/devctrl.c. References _IRP::AssociatedIrp, FsRtlLookupLargeMcbEntry(), IoCallDriver, IoCopyCurrentIrpStackLocationToNext, IoGetCurrentIrpStackLocation, IoSetCompletionRoutine, Irp, LlBytesFromSectors, LlSectorsFromBytes, NTSTATUS(), NULL, Offset, _IO_STACK_LOCATION::Parameters, Status, TRUE, UdfCompleteRequest(), and UdfDevCtrlCompletionRoutine(). Referenced by UdfCommonDevControl(). : This routine handles the special form of the Dvd key negotiation IOCTLs performed in the context of a file. For these IOCTLs, the incoming parameter is in file-relative form, which must be translated to a device-relatvie form before it can continue. Arguments: Irp - Supplies the Irp to process Fcb - Supplies the file being operated with Return Value: NTSTATUS - The return status for the operation --*/ { NTSTATUS Status = STATUS_INVALID_PARAMETER; PDVD_COPY_PROTECT_KEY TransferKey; LARGE_INTEGER Offset; BOOLEAN Result; PIO_STACK_LOCATION IrpSp; // // Grab the input buffer and confirm basic validity. // IrpSp = IoGetCurrentIrpStackLocation( Irp ); TransferKey = (PDVD_COPY_PROTECT_KEY) Irp->AssociatedIrp.SystemBuffer; if (IrpSp->Parameters.DeviceIoControl.InputBufferLength < sizeof(DVD_COPY_PROTECT_KEY) || TransferKey->Parameters.TitleOffset.QuadPart > Fcb->FileSize.QuadPart) { UdfCompleteRequest( IrpContext, Irp, Status ); return Status; } // // Now, convert the file byte offset in the structure to a physical sector. // Result = FsRtlLookupLargeMcbEntry( &Fcb->Mcb, LlSectorsFromBytes( Fcb->Vcb, TransferKey->Parameters.TitleOffset.QuadPart ), &Offset.QuadPart, NULL, NULL, NULL, NULL ); // // If we failed the lookup, we know that this must be some form of unrecorded // extent on the media. This IOCTL is ill-defined at this point, so we have // to give up. // if (!Result || Offset.QuadPart == -1) { UdfCompleteRequest( IrpContext, Irp, Status ); return Status; } // // The input is buffered from user space, so we know we can just rewrite it. // TransferKey->Parameters.TitleOffset.QuadPart = LlBytesFromSectors( Fcb->Vcb, Offset.QuadPart ); // // Copy the arguments and set up the completion routine // IoCopyCurrentIrpStackLocationToNext( Irp ); IoSetCompletionRoutine( Irp, UdfDevCtrlCompletionRoutine, NULL, TRUE, TRUE, TRUE ); // // Send the request. // Status = IoCallDriver( IrpContext->Vcb->TargetDeviceObject, Irp ); // // Cleanup our Irp Context. The driver has completed the Irp. // UdfCompleteRequest( IrpContext, NULL, STATUS_SUCCESS ); return Status; }

---