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1161 lines
27 KiB
1161 lines
27 KiB
/*++
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Copyright (c) 2001 Microsoft Corporation
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Module Name:
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scsi.c
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Abstract:
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This file contains RAM disk driver code for processing SCSI commands.
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Author:
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Chuck Lenzmeier (ChuckL) 2001
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Environment:
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Kernel mode only.
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Notes:
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Revision History:
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--*/
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#include "precomp.h"
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#pragma hdrstop
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//
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// Local functions.
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//
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NTSTATUS
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Do6ByteCdbCommand (
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IN PDEVICE_OBJECT DeviceObject,
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IN OUT PSCSI_REQUEST_BLOCK Srb
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);
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NTSTATUS
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Do10ByteCdbCommand (
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IN PDEVICE_OBJECT DeviceObject,
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IN OUT PIRP Irp,
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IN OUT PSCSI_REQUEST_BLOCK Srb
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);
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NTSTATUS
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Do12ByteCdbCommand (
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IN PDEVICE_OBJECT DeviceObject,
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IN OUT PSCSI_REQUEST_BLOCK Srb
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);
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NTSTATUS
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BuildInquiryData (
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IN PDEVICE_OBJECT DeviceObject,
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IN OUT PSCSI_REQUEST_BLOCK Srb
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);
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NTSTATUS
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BuildModeSenseInfo (
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IN PDEVICE_OBJECT DeviceObject,
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IN OUT PSCSI_REQUEST_BLOCK Srb
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);
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//
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// Declare pageable routines.
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//
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text( PAGE, RamdiskScsiExecuteNone )
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#pragma alloc_text( PAGE, RamdiskScsiExecuteIo )
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#pragma alloc_text( PAGE, Do6ByteCdbCommand )
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#pragma alloc_text( PAGE, Do10ByteCdbCommand )
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#pragma alloc_text( PAGE, Do12ByteCdbCommand )
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#pragma alloc_text( PAGE, BuildInquiryData )
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#pragma alloc_text( PAGE, BuildModeSenseInfo )
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#endif // ALLOC_PRAGMA
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NTSTATUS
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RamdiskScsi (
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IN PDEVICE_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 by the I/O system to process a SCSI IRP.
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Arguments:
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DeviceObject - a pointer to the object that represents the device on which
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I/O is to be performed
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Irp - a pointer to the I/O Request Packet for this request
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Return Value:
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NTSTATUS - the status of the operation
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--*/
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{
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NTSTATUS status;
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PDISK_EXTENSION diskExtension;
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diskExtension = DeviceObject->DeviceExtension;
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//
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// ISSUE: Can't be paged because ClassCheckMediaState calls it from timer
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// routine. (For removable disks.) Therefore we can't acquire the device
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// mutex here.
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//
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//
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// Check to see if the device is being removed.
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//
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if ( diskExtension->DeviceState > RamdiskDeviceStatePendingRemove ) {
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status = STATUS_DEVICE_DOES_NOT_EXIST;
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COMPLETE_REQUEST( status, 0, Irp );
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return status;
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}
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//
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// Acquire the remove lock for the device.
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//
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status = IoAcquireRemoveLock( &diskExtension->RemoveLock, Irp );
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if ( !NT_SUCCESS(status) ) {
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DBGPRINT( DBG_PNP, DBG_ERROR, ("%s", "RamdiskScsi: acquire RemoveLock failed\n") );
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COMPLETE_REQUEST( status, 0, Irp );
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return status;
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}
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//
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// This IRP must be processed in thread context.
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//
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status = SendIrpToThread( DeviceObject, Irp );
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if ( status != STATUS_PENDING ) {
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DBGPRINT( DBG_PNP, DBG_ERROR, ("%s", "RamdiskScsi: SendIrpToThread failed\n") );
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COMPLETE_REQUEST( status, 0, Irp );
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return status;
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}
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//
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// Release the remove lock.
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//
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IoReleaseRemoveLock(&diskExtension->RemoveLock, Irp );
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return STATUS_PENDING;
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} // RamdiskScsi
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NTSTATUS
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RamdiskScsiExecuteNone (
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PDEVICE_OBJECT DeviceObject,
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PIRP Irp,
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PSCSI_REQUEST_BLOCK Srb,
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ULONG ControlCode
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)
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/*++
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Routine Description:
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This routine is called by the I/O system to process a SCSI IRP that
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does not involve I/O.
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Arguments:
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DeviceObject - a pointer to the object that represents the device on which
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I/O is to be performed
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Irp - a pointer to the I/O Request Packet for this request
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Srb - the SRB associated with the IRP
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ControlCode - the control code from the SRB
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Return Value:
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NTSTATUS - the status of the operation
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--*/
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{
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NTSTATUS status;
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UCHAR function;
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PDISK_EXTENSION diskExtension;
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PAGED_CODE();
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diskExtension = DeviceObject->DeviceExtension;
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//
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// Dispatch based on the SRB function.
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//
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function = Srb->Function;
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switch( function ) {
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case SRB_FUNCTION_ATTACH_DEVICE:
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case SRB_FUNCTION_CLAIM_DEVICE:
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DBGPRINT( DBG_SRB, DBG_VERBOSE, ("%s", "SRB_FUNCTION_CLAIM_DEVICE\n") );
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//
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// If the device has not already been claimed, mark it so now.
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// Otherwise, indicate to the caller that the device is busy.
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//
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if ( (diskExtension->Status & RAMDISK_STATUS_CLAIMED) == 0 ) {
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diskExtension->DeviceState = RamdiskDeviceStateWorking;
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diskExtension->Status |= RAMDISK_STATUS_CLAIMED;
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Srb->DataBuffer = DeviceObject;
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status = STATUS_SUCCESS;
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Srb->ScsiStatus = SCSISTAT_GOOD;
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Srb->SrbStatus = SRB_STATUS_SUCCESS;
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} else {
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status = STATUS_DEVICE_BUSY;
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Srb->ScsiStatus = SCSISTAT_BUSY;
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Srb->SrbStatus = SRB_STATUS_BUSY;
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}
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break;
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case SRB_FUNCTION_RELEASE_DEVICE:
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case SRB_FUNCTION_REMOVE_DEVICE:
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DBGPRINT( DBG_SRB, DBG_VERBOSE, ("%s", "SRB_FUNCTION_RELEASE_DEVICE\n") );
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//
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// Indicate that the device is no longer claimed.
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//
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diskExtension->Status &= ~RAMDISK_STATUS_CLAIMED;
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status = STATUS_SUCCESS;
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Srb->ScsiStatus = SCSISTAT_GOOD;
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Srb->SrbStatus = SRB_STATUS_SUCCESS;
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break;
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default:
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//
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// Unrecognized non-I/O function. Try the I/O path.
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//
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status = RamdiskScsiExecuteIo( DeviceObject, Irp, Srb, ControlCode );
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break;
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}
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return status;
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} // RamdiskScsiExecuteNone
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NTSTATUS
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RamdiskScsiExecuteIo (
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PDEVICE_OBJECT DeviceObject,
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PIRP Irp,
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PSCSI_REQUEST_BLOCK Srb,
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ULONG ControlCode
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)
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/*++
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Routine Description:
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This routine is called by the I/O system to process a SCSI IRP that
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involves I/O.
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Arguments:
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DeviceObject - a pointer to the object that represents the device on which
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I/O is to be performed
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Irp - a pointer to the I/O Request Packet for this request
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Srb - the SRB associated with the IRP
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ControlCode - the control code from the SRB
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Return Value:
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NTSTATUS - the status of the operation
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--*/
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{
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NTSTATUS status;
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UCHAR function;
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PDISK_EXTENSION diskExtension;
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PAGED_CODE();
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diskExtension = DeviceObject->DeviceExtension;
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//
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// Dispatch based on the SRB function.
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//
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function = Srb->Function;
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switch( function ) {
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case SRB_FUNCTION_EXECUTE_SCSI:
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Srb->SrbStatus = SRB_STATUS_SUCCESS;
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//
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// Dispatch based on the CDB length.
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//
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switch( Srb->CdbLength ) {
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case 6:
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status = Do6ByteCdbCommand( DeviceObject, Srb );
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break;
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case 10:
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status = Do10ByteCdbCommand( DeviceObject, Irp, Srb );
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break;
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case 12:
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status = Do12ByteCdbCommand( DeviceObject, Srb );
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break;
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default:
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DBGPRINT( DBG_SRB, DBG_ERROR,
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("Unknown CDB length 0x%x for function 0x%x, IOCTL 0x%x\n",
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Srb->CdbLength, function, ControlCode) );
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UNRECOGNIZED_IOCTL_BREAK;
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status = STATUS_INVALID_DEVICE_REQUEST;
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Srb->SrbStatus = SRB_STATUS_INVALID_REQUEST;
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break;
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}
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break;
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case SRB_FUNCTION_FLUSH:
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case SRB_FUNCTION_SHUTDOWN:
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//
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// For flush and shutdown on a file-backed RAM disk, we need to flush
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// the mapped data back to the file.
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//
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status = RamdiskFlushBuffersReal( diskExtension );
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Srb->SrbStatus = SRB_STATUS_SUCCESS;
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break;
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case SRB_FUNCTION_IO_CONTROL:
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//
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// We don't handle this function, but we don't want to complain
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// when we get it.
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//
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status = STATUS_INVALID_DEVICE_REQUEST;
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Srb->SrbStatus = SRB_STATUS_INVALID_REQUEST;
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break;
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default:
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DBGPRINT( DBG_SRB, DBG_ERROR,
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("Unknown SRB Function 0x%x for IOCTL 0x%x\n", function, ControlCode) );
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UNRECOGNIZED_IOCTL_BREAK;
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status = STATUS_INTERNAL_ERROR;
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}
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return status;
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} // RamdiskScsiExecuteIo
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NTSTATUS
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Do6ByteCdbCommand (
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IN PDEVICE_OBJECT DeviceObject,
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IN OUT PSCSI_REQUEST_BLOCK Srb
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)
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/*++
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Routine Description:
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This routine handles 6-byte CDBs.
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Arguments:
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DeviceObject - a pointer to the object that represents the device on which
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I/O is to be performed
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Srb - the SRB associated with the I/O request
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Return Value:
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NTSTATUS - the status of the operation
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--*/
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{
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NTSTATUS status;
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PDISK_EXTENSION diskExtension;
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PCDB cdb;
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PAGED_CODE();
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//
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// Get pointers to the device extension and to the CDB.
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//
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diskExtension = DeviceObject->DeviceExtension;
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cdb = (PCDB)Srb->Cdb;
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//
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// Assume success.
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//
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status = STATUS_SUCCESS;
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Srb->SrbStatus = SRB_STATUS_SUCCESS;
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Srb->ScsiStatus = SCSISTAT_GOOD;
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ASSERT( Srb->CdbLength == 6 );
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ASSERT( cdb != NULL );
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DBGPRINT( DBG_SRB, DBG_VERBOSE,
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("Do6ByteCdbCommand Called OpCode 0x%x\n", cdb->CDB6GENERIC.OperationCode) );
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//
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// Dispatch based on the operation code.
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//
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switch ( cdb->CDB6GENERIC.OperationCode ) {
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case SCSIOP_TEST_UNIT_READY:
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//
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// RAM disks are always ready.
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//
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break;
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case SCSIOP_REQUEST_SENSE:
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//
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// We don't handle request sense.
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//
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Srb->SrbStatus = SRB_STATUS_INVALID_REQUEST;
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status = STATUS_INVALID_DEVICE_REQUEST;
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break;
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case SCSIOP_FORMAT_UNIT:
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// ISSUE: Need to do something here, like zero the image?
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break;
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case SCSIOP_INQUIRY:
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//
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// If the buffer is big enough, build the inquiry data.
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//
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if ( Srb->DataTransferLength >= INQUIRYDATABUFFERSIZE ) {
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status = BuildInquiryData( DeviceObject, Srb );
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} else {
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Srb->SrbStatus = SRB_STATUS_INVALID_REQUEST;
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status = STATUS_INVALID_DEVICE_REQUEST;
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}
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break;
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case SCSIOP_MODE_SENSE:
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//
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// Build the mode sense information.
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//
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status = BuildModeSenseInfo( DeviceObject, Srb );
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break;
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case SCSIOP_MEDIUM_REMOVAL:
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//
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// Remember whether media removal is allowed.
|
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//
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if (cdb->MEDIA_REMOVAL.Prevent == TRUE) {
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diskExtension->Status |= RAMDISK_STATUS_PREVENT_REMOVE;
|
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} else {
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diskExtension->Status &= ~RAMDISK_STATUS_PREVENT_REMOVE;
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}
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break;
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//case SCSIOP_READ6:
|
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//case SCSIOP_WRITE6:
|
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//case SCSIOP_REZERO_UNIT:
|
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//case SCSIOP_REQUEST_BLOCK_ADDR:
|
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//case SCSIOP_READ_BLOCK_LIMITS:
|
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//case SCSIOP_REASSIGN_BLOCKS:
|
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//case SCSIOP_SEEK6:
|
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//case SCSIOP_SEEK_BLOCK:
|
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//case SCSIOP_PARTITION:
|
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//case SCSIOP_READ_REVERSE:
|
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//case SCSIOP_WRITE_FILEMARKS:
|
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//case SCSIOP_SPACE:
|
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//case SCSIOP_VERIFY6:
|
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//case SCSIOP_RECOVER_BUF_DATA:
|
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//case SCSIOP_MODE_SELECT:
|
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//case SCSIOP_RESERVE_UNIT:
|
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//case SCSIOP_RELEASE_UNIT:
|
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//case SCSIOP_COPY:
|
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//case SCSIOP_ERASE:
|
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//case SCSIOP_START_STOP_UNIT:
|
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//case SCSIOP_RECEIVE_DIAGNOSTIC:
|
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//case SCSIOP_SEND_DIAGNOSTIC:
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|
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default:
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|
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DBGPRINT( DBG_SRB, DBG_ERROR,
|
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("Unknown CDB Function 0x%x\n", cdb->CDB6GENERIC.OperationCode) );
|
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UNRECOGNIZED_IOCTL_BREAK;
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|
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status = STATUS_INVALID_DEVICE_REQUEST;
|
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Srb->SrbStatus = SRB_STATUS_INVALID_REQUEST;
|
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}
|
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|
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DBGPRINT( DBG_SRB, DBG_VERBOSE, ("Do6ByteCdbCommand Done status 0x%x\n", status) );
|
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|
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return status;
|
|
|
|
} // Do6ByteCdbCommand
|
|
|
|
NTSTATUS
|
|
Do10ByteCdbCommand (
|
|
IN PDEVICE_OBJECT DeviceObject,
|
|
IN OUT PIRP Irp,
|
|
IN OUT PSCSI_REQUEST_BLOCK Srb
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine handles 10-byte CDBs.
|
|
|
|
Arguments:
|
|
|
|
DeviceObject - a pointer to the object that represents the device on which
|
|
I/O is to be performed
|
|
|
|
Irp - a pointer to the I/O Request Packet for this request
|
|
|
|
Srb - the SRB associated with the IRP
|
|
|
|
Return Value:
|
|
|
|
NTSTATUS - the status of the operation
|
|
|
|
--*/
|
|
|
|
{
|
|
NTSTATUS status;
|
|
PDISK_EXTENSION diskExtension;
|
|
PCDB cdb;
|
|
PREAD_CAPACITY_DATA readCapacityData;
|
|
ULONGLONG diskSize;
|
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ULONG lastBlock;
|
|
FOUR_BYTE startingBlockNumber;
|
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TWO_BYTE count;
|
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ULONG_PTR offset;
|
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ULONG dataSize;
|
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PUCHAR diskByteAddress;
|
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PUCHAR dataBuffer;
|
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ULONG mappedLength;
|
|
|
|
PAGED_CODE();
|
|
|
|
//
|
|
// Get pointers to the device extension and to the CDB.
|
|
//
|
|
|
|
diskExtension = DeviceObject->DeviceExtension;
|
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cdb = (PCDB)Srb->Cdb;
|
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|
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//
|
|
// Assume success.
|
|
//
|
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|
|
status = STATUS_SUCCESS;
|
|
Srb->SrbStatus = SRB_STATUS_SUCCESS;
|
|
Srb->ScsiStatus = SCSISTAT_GOOD;
|
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|
|
ASSERT( Srb->CdbLength == 10 );
|
|
ASSERT( cdb != NULL );
|
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|
|
DBGPRINT( DBG_SRB, DBG_VERBOSE,
|
|
("Do10ByteCdbCommand Called OpCode 0x%x\n", cdb->CDB10.OperationCode) );
|
|
|
|
//
|
|
// Dispatch based on the operation code.
|
|
//
|
|
|
|
switch ( cdb->CDB10.OperationCode ) {
|
|
|
|
case SCSIOP_READ_CAPACITY:
|
|
|
|
//
|
|
// Return the disk's block size and last block number (big-endian).
|
|
//
|
|
|
|
readCapacityData = Srb->DataBuffer;
|
|
|
|
diskSize = diskExtension->DiskLength;
|
|
lastBlock = (ULONG)(diskSize / diskExtension->BytesPerSector) - 1;
|
|
|
|
readCapacityData->BytesPerBlock = _byteswap_ulong( diskExtension->BytesPerSector );
|
|
readCapacityData->LogicalBlockAddress = _byteswap_ulong( lastBlock );
|
|
|
|
break;
|
|
|
|
case SCSIOP_READ:
|
|
case SCSIOP_WRITE:
|
|
|
|
//
|
|
// Read from or write to the disk.
|
|
//
|
|
|
|
//
|
|
// Convert the transfer length, in blocks, from big-endian. Convert
|
|
// that to bytes.
|
|
//
|
|
|
|
count.Byte0 = cdb->CDB10.TransferBlocksLsb;
|
|
count.Byte1 = cdb->CDB10.TransferBlocksMsb;
|
|
|
|
dataSize = count.AsUShort * diskExtension->BytesPerSector;
|
|
|
|
//
|
|
// If the CDB length is greater than the SRB length, use the SRB
|
|
// length.
|
|
//
|
|
|
|
if ( dataSize > Srb->DataTransferLength ) {
|
|
dataSize = Srb->DataTransferLength;
|
|
}
|
|
|
|
//
|
|
// Convert the starting block number from big-endian.
|
|
//
|
|
|
|
startingBlockNumber.Byte0 = cdb->CDB10.LogicalBlockByte3;
|
|
startingBlockNumber.Byte1 = cdb->CDB10.LogicalBlockByte2;
|
|
startingBlockNumber.Byte2 = cdb->CDB10.LogicalBlockByte1;
|
|
startingBlockNumber.Byte3 = cdb->CDB10.LogicalBlockByte0;
|
|
|
|
//
|
|
// We don't handle RelativeAddress requests.
|
|
//
|
|
|
|
if ( cdb->CDB10.RelativeAddress ) {
|
|
|
|
Srb->SrbStatus = SRB_STATUS_INVALID_REQUEST;
|
|
status = STATUS_INVALID_DEVICE_REQUEST;
|
|
|
|
break;
|
|
}
|
|
|
|
//
|
|
// Get the offset within the disk to the start of the operation.
|
|
//
|
|
|
|
offset = (startingBlockNumber.AsULong * diskExtension->BytesPerSector);
|
|
|
|
//
|
|
// If the transfer length causes the offset to wrap, or if the request
|
|
// goes beyond the end of the disk, reject the request.
|
|
//
|
|
|
|
if ( ((offset + dataSize) < offset) ||
|
|
((offset + dataSize) > diskExtension->DiskLength) ) {
|
|
|
|
Srb->SrbStatus = SRB_STATUS_INVALID_REQUEST;
|
|
status = STATUS_INVALID_DEVICE_REQUEST;
|
|
|
|
break;
|
|
}
|
|
|
|
//
|
|
// For a zero-length transfer, we don't have to do anything.
|
|
//
|
|
|
|
DBGPRINT( DBG_READWRITE, DBG_VERBOSE,
|
|
("%s: Starting Block 0x%x, Length 0x%x at Offset 0x%I64x SrbBuffer=0x%p "
|
|
"SrbLength=0x%x, MdlLength=0x%x\n",
|
|
cdb->CDB10.OperationCode == SCSIOP_READ ? "Read" : "Write",
|
|
startingBlockNumber.AsULong, count.AsUShort, offset,
|
|
Srb->DataBuffer,
|
|
Srb->DataTransferLength,
|
|
Irp->MdlAddress->ByteCount) );
|
|
|
|
dataBuffer = Srb->DataBuffer;
|
|
|
|
while ( dataSize != 0 ) {
|
|
|
|
//
|
|
// Map the target section of the disk into memory. Then copy the
|
|
// data in the appropriate direction.
|
|
//
|
|
|
|
diskByteAddress = RamdiskMapPages( diskExtension, offset, dataSize, &mappedLength );
|
|
|
|
if ( diskByteAddress != NULL ) {
|
|
|
|
if ( cdb->CDB10.OperationCode == SCSIOP_READ ) {
|
|
|
|
memcpy( dataBuffer, diskByteAddress, mappedLength );
|
|
|
|
} else {
|
|
|
|
memcpy( diskByteAddress, dataBuffer, mappedLength );
|
|
}
|
|
|
|
RamdiskUnmapPages( diskExtension, diskByteAddress, offset, mappedLength );
|
|
|
|
dataSize -= mappedLength;
|
|
offset += mappedLength;
|
|
dataBuffer += mappedLength;
|
|
|
|
} else {
|
|
|
|
dataSize = 0;
|
|
Srb->SrbStatus = SRB_STATUS_ERROR;
|
|
status = STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case SCSIOP_VERIFY:
|
|
|
|
//
|
|
// Verify always succeeds.
|
|
//
|
|
|
|
break;
|
|
|
|
case SCSIOP_MODE_SENSE10:
|
|
|
|
//
|
|
// Build the mode sense information.
|
|
//
|
|
|
|
status = BuildModeSenseInfo( DeviceObject, Srb );
|
|
|
|
break;
|
|
|
|
//case SCSIOP_SEEK:
|
|
//case SCSIOP_WRITE_VERIFY:
|
|
//case SCSIOP_READ_FORMATTED_CAPACITY:
|
|
//case SCSIOP_SEARCH_DATA_HIGH:
|
|
//case SCSIOP_SEARCH_DATA_EQUAL:
|
|
//case SCSIOP_SEARCH_DATA_LOW:
|
|
//case SCSIOP_SET_LIMITS:
|
|
//case SCSIOP_READ_POSITION:
|
|
//case SCSIOP_SYNCHRONIZE_CACHE:
|
|
//case SCSIOP_COMPARE:
|
|
//case SCSIOP_COPY_COMPARE:
|
|
//case SCSIOP_WRITE_DATA_BUFF:
|
|
//case SCSIOP_READ_DATA_BUFF:
|
|
//case SCSIOP_CHANGE_DEFINITION:
|
|
//case SCSIOP_READ_SUB_CHANNEL:
|
|
//case SCSIOP_READ_TOC:
|
|
//case SCSIOP_READ_HEADER:
|
|
//case SCSIOP_PLAY_AUDIO:
|
|
//case SCSIOP_GET_CONFIGURATION:
|
|
//case SCSIOP_PLAY_AUDIO_MSF:
|
|
//case SCSIOP_PLAY_TRACK_INDEX:
|
|
//case SCSIOP_PLAY_TRACK_RELATIVE:
|
|
//case SCSIOP_GET_EVENT_STATUS:
|
|
//case SCSIOP_PAUSE_RESUME:
|
|
//case SCSIOP_LOG_SELECT:
|
|
//case SCSIOP_LOG_SENSE:
|
|
//case SCSIOP_STOP_PLAY_SCAN:
|
|
//case SCSIOP_READ_DISK_INFORMATION:
|
|
//case SCSIOP_READ_TRACK_INFORMATION:
|
|
//case SCSIOP_RESERVE_TRACK_RZONE:
|
|
//case SCSIOP_SEND_OPC_INFORMATION:
|
|
//case SCSIOP_MODE_SELECT10:
|
|
//case SCSIOP_CLOSE_TRACK_SESSION:
|
|
//case SCSIOP_READ_BUFFER_CAPACITY:
|
|
//case SCSIOP_SEND_CUE_SHEET:
|
|
//case SCSIOP_PERSISTENT_RESERVE_IN:
|
|
//case SCSIOP_PERSISTENT_RESERVE_OUT:
|
|
|
|
default:
|
|
|
|
DBGPRINT( DBG_SRB, DBG_ERROR,
|
|
("Unknown CDB Function 0x%x\n", cdb->CDB10.OperationCode) );
|
|
UNRECOGNIZED_IOCTL_BREAK;
|
|
|
|
status = STATUS_INVALID_DEVICE_REQUEST;
|
|
Srb->SrbStatus = SRB_STATUS_INVALID_REQUEST;
|
|
}
|
|
|
|
DBGPRINT( DBG_SRB, DBG_VERBOSE, ("Do10ByteCdbCommand Done status 0x%x\n", status) );
|
|
|
|
return status;
|
|
|
|
} // Do10ByteCdbCommand
|
|
|
|
NTSTATUS
|
|
Do12ByteCdbCommand (
|
|
IN PDEVICE_OBJECT DeviceObject,
|
|
IN OUT PSCSI_REQUEST_BLOCK Srb
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine handles 12-byte CDBs.
|
|
|
|
Arguments:
|
|
|
|
DeviceObject - a pointer to the object that represents the device on which
|
|
I/O is to be performed
|
|
|
|
Srb - the SRB associated with the IRP
|
|
|
|
Return Value:
|
|
|
|
NTSTATUS - the status of the operation
|
|
|
|
--*/
|
|
|
|
{
|
|
NTSTATUS status;
|
|
PDISK_EXTENSION diskExtension;
|
|
PCDB cdb;
|
|
|
|
PAGED_CODE();
|
|
|
|
//
|
|
// Get pointers to the device extension and to the CDB.
|
|
//
|
|
|
|
diskExtension = DeviceObject->DeviceExtension;
|
|
cdb = (PCDB)Srb->Cdb;
|
|
|
|
//
|
|
// Assume success.
|
|
//
|
|
|
|
status = STATUS_SUCCESS;
|
|
Srb->SrbStatus = SRB_STATUS_SUCCESS;
|
|
Srb->ScsiStatus = SCSISTAT_GOOD;
|
|
|
|
ASSERT( Srb->CdbLength == 12 );
|
|
ASSERT( cdb != NULL );
|
|
|
|
DBGPRINT( DBG_SRB, DBG_VERBOSE,
|
|
("Do12ByteCdbCommand Called OpCode 0x%x\n", cdb->CDB12.OperationCode) );
|
|
|
|
//
|
|
// Dispatch based on the operation code.
|
|
//
|
|
|
|
switch ( cdb->CDB12.OperationCode ) {
|
|
|
|
//case SCSIOP_REPORT_LUNS:
|
|
//case SCSIOP_BLANK:
|
|
//case SCSIOP_SEND_KEY:
|
|
//case SCSIOP_REPORT_KEY:
|
|
//case SCSIOP_MOVE_MEDIUM:
|
|
//case SCSIOP_LOAD_UNLOAD_SLOT:
|
|
//case SCSIOP_SET_READ_AHEAD:
|
|
//case SCSIOP_READ_DVD_STRUCTURE:
|
|
//case SCSIOP_REQUEST_VOL_ELEMENT:
|
|
//case SCSIOP_SEND_VOLUME_TAG:
|
|
//case SCSIOP_READ_ELEMENT_STATUS:
|
|
//case SCSIOP_READ_CD_MSF:
|
|
//case SCSIOP_SCAN_CD:
|
|
//case SCSIOP_SET_CD_SPEED:
|
|
//case SCSIOP_PLAY_CD:
|
|
//case SCSIOP_MECHANISM_STATUS:
|
|
//case SCSIOP_READ_CD:
|
|
//case SCSIOP_SEND_DVD_STRUCTURE:
|
|
//case SCSIOP_INIT_ELEMENT_RANGE:
|
|
|
|
default:
|
|
|
|
DBGPRINT( DBG_SRB, DBG_ERROR,
|
|
("Unknown CDB Function 0x%x\n", cdb->CDB12.OperationCode) );
|
|
UNRECOGNIZED_IOCTL_BREAK;
|
|
|
|
status = STATUS_INVALID_DEVICE_REQUEST;
|
|
Srb->SrbStatus = SRB_STATUS_INVALID_REQUEST;
|
|
}
|
|
|
|
DBGPRINT( DBG_SRB, DBG_VERBOSE, ("Do12ByteCdbCommand Done status 0x%x\n", status) );
|
|
|
|
return status;
|
|
|
|
} // Do12ByteCdbCommand
|
|
|
|
NTSTATUS
|
|
BuildInquiryData (
|
|
IN PDEVICE_OBJECT DeviceObject,
|
|
IN OUT PSCSI_REQUEST_BLOCK Srb
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine builds inquiry data.
|
|
|
|
Arguments:
|
|
|
|
DeviceObject - a pointer to the object that represents the device on which
|
|
I/O is to be performed
|
|
|
|
Srb - the SRB associated with the I/O request
|
|
|
|
Return Value:
|
|
|
|
NTSTATUS - the status of the operation
|
|
|
|
--*/
|
|
|
|
{
|
|
PDISK_EXTENSION diskExtension;
|
|
PINQUIRYDATA inquiryData;
|
|
STRING vendor;
|
|
STRING product;
|
|
STRING revLevel;
|
|
|
|
PAGED_CODE();
|
|
|
|
//
|
|
// Get pointers to the device extension and to the inquiry data buffer.
|
|
//
|
|
|
|
diskExtension = DeviceObject->DeviceExtension;
|
|
inquiryData = (PINQUIRYDATA)Srb->DataBuffer;
|
|
|
|
//
|
|
// Build the inquiry data.
|
|
//
|
|
|
|
RtlInitString( &vendor, "Microsoft" );
|
|
RtlInitString( &product, "Ramdisk" );
|
|
RtlInitString( &revLevel, "1.0" );
|
|
|
|
RtlZeroMemory( inquiryData, INQUIRYDATABUFFERSIZE );
|
|
inquiryData->DeviceType = DIRECT_ACCESS_DEVICE;
|
|
inquiryData->RemovableMedia = (diskExtension->Options.Fixed ? FALSE : TRUE);
|
|
inquiryData->ANSIVersion = 2;
|
|
inquiryData->ResponseDataFormat = 2;
|
|
inquiryData->AdditionalLength = INQUIRYDATABUFFERSIZE - 4;
|
|
|
|
RtlCopyMemory(
|
|
inquiryData->VendorId,
|
|
vendor.Buffer,
|
|
min( vendor.Length, sizeof(inquiryData->VendorId) )
|
|
);
|
|
RtlCopyMemory(
|
|
inquiryData->ProductId,
|
|
product.Buffer,
|
|
min( product.Length, sizeof(inquiryData->ProductId) )
|
|
);
|
|
RtlCopyMemory(
|
|
inquiryData->ProductRevisionLevel,
|
|
revLevel.Buffer,
|
|
min( revLevel.Length, sizeof(inquiryData->ProductRevisionLevel) )
|
|
);
|
|
|
|
return STATUS_SUCCESS;
|
|
|
|
} // BuildInquiryData
|
|
|
|
NTSTATUS
|
|
BuildModeSenseInfo (
|
|
IN PDEVICE_OBJECT DeviceObject,
|
|
IN OUT PSCSI_REQUEST_BLOCK Srb
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine builds mode sense information.
|
|
|
|
Arguments:
|
|
|
|
DeviceObject - a pointer to the object that represents the device on which
|
|
I/O is to be performed
|
|
|
|
Srb - the SRB associated with the I/O request
|
|
|
|
Return Value:
|
|
|
|
NTSTATUS - the status of the operation
|
|
|
|
--*/
|
|
|
|
{
|
|
PDISK_EXTENSION diskExtension;
|
|
MODE_PARAMETER_HEADER modeHeader = {0};
|
|
MODE_PARAMETER_HEADER10 modeHeader10 = {0};
|
|
PVOID header = NULL;
|
|
PVOID data = NULL;
|
|
unsigned char headerSize;
|
|
unsigned dataSize = 0;
|
|
PCDB cdb;
|
|
unsigned cdbLength;
|
|
unsigned dataBufferLength;
|
|
unsigned char valueType;
|
|
unsigned dataLength;
|
|
|
|
PAGED_CODE();
|
|
|
|
//
|
|
// Get pointers to the device extension and to the inquiry data buffer.
|
|
//
|
|
|
|
diskExtension = DeviceObject->DeviceExtension;
|
|
cdb = (PCDB)Srb->Cdb;
|
|
cdbLength = Srb->CdbLength;
|
|
|
|
//
|
|
// Dispatch based on the CDB length.
|
|
//
|
|
|
|
switch ( cdbLength ) {
|
|
|
|
case 6:
|
|
|
|
dataBufferLength = cdb->MODE_SENSE.AllocationLength;
|
|
valueType = cdb->MODE_SENSE.Pc;
|
|
headerSize = sizeof(MODE_PARAMETER_HEADER);
|
|
|
|
if ( valueType != 0 ) {
|
|
|
|
//
|
|
// We only support current value retrieval.
|
|
//
|
|
|
|
Srb->SrbStatus = SRB_STATUS_INVALID_REQUEST;
|
|
return STATUS_INVALID_DEVICE_REQUEST;
|
|
}
|
|
|
|
if ( dataBufferLength > headerSize ) {
|
|
|
|
header = &modeHeader;
|
|
data = (char*)header + headerSize;
|
|
dataLength = headerSize - FIELD_OFFSET( MODE_PARAMETER_HEADER, MediumType );
|
|
modeHeader.ModeDataLength = (UCHAR)dataLength;
|
|
modeHeader.MediumType = 0x00;
|
|
modeHeader.DeviceSpecificParameter = 0x00;
|
|
modeHeader.BlockDescriptorLength = 0x00;
|
|
}
|
|
|
|
break;
|
|
|
|
case 10:
|
|
|
|
dataBufferLength = *(USHORT *)cdb->MODE_SENSE10.AllocationLength;
|
|
valueType = cdb->MODE_SENSE10.Pc;
|
|
headerSize = sizeof(MODE_PARAMETER_HEADER10);
|
|
|
|
if ( dataBufferLength > headerSize ) {
|
|
|
|
header = &modeHeader10;
|
|
data = (char*)header + headerSize;
|
|
dataLength = headerSize - FIELD_OFFSET( MODE_PARAMETER_HEADER10, MediumType );
|
|
RtlCopyMemory(
|
|
modeHeader10.ModeDataLength,
|
|
&dataLength,
|
|
sizeof(modeHeader10.ModeDataLength)
|
|
);
|
|
modeHeader10.MediumType = 0x00;
|
|
modeHeader10.DeviceSpecificParameter = 0x00;
|
|
modeHeader10.BlockDescriptorLength[0] = 0;
|
|
modeHeader10.BlockDescriptorLength[1] = 0;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
//
|
|
// Can't get here.
|
|
//
|
|
|
|
ASSERT( FALSE );
|
|
|
|
Srb->SrbStatus = SRB_STATUS_INVALID_REQUEST;
|
|
return STATUS_INVALID_DEVICE_REQUEST;
|
|
}
|
|
|
|
if ( header != NULL ) {
|
|
|
|
RtlCopyMemory( Srb->DataBuffer, header, headerSize );
|
|
dataBufferLength -= headerSize;
|
|
}
|
|
|
|
if ( (data != NULL) && (dataBufferLength != 0) ) {
|
|
|
|
RtlCopyMemory(
|
|
(PUCHAR)Srb->DataBuffer + headerSize,
|
|
data,
|
|
min( dataBufferLength, dataSize )
|
|
);
|
|
}
|
|
|
|
return STATUS_SUCCESS;
|
|
|
|
} // BuildModeSenseInfo
|
|
|