public SCSIStatusCodeName Read(SCSICommandDescriptorBlock command, LUNStructure lun, out byte[] response)
{
Disk disk = m_disks[lun];
int sectorCount = (int)command.TransferLength;
Log(Severity.Verbose, "LUN {0}: Reading {1} blocks starting from LBA {2}", (ushort)lun, sectorCount, (long)command.LogicalBlockAddress64);
try
{
response = disk.ReadSectors((long)command.LogicalBlockAddress64, sectorCount);
return(SCSIStatusCodeName.Good);
}
catch (ArgumentOutOfRangeException)
{
Log(Severity.Error, "Read error: LBA out of range");
response = FormatSenseData(SenseDataParameter.GetIllegalRequestLBAOutOfRangeSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
catch (CyclicRedundancyCheckException)
{
Log(Severity.Error, "Read error: CRC error");
response = FormatSenseData(SenseDataParameter.GetWriteFaultSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
catch (IOException ex)
{
Log(Severity.Error, "Read error: {0}", ex.ToString());
response = FormatSenseData(SenseDataParameter.GetMediumErrorUnrecoverableReadErrorSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
}
public SCSIStatusCodeName Write(SCSICommandDescriptorBlock command, LUNStructure lun, byte[] data, out byte[] response)
{
Disk disk = m_disks[lun];
if (disk.IsReadOnly)
{
Log(Severity.Verbose, "LUN {0}: Refused attempt to write to a read-only disk", lun);
SenseDataParameter senseData = SenseDataParameter.GetDataProtectSenseData();
response = senseData.GetBytes();
return(SCSIStatusCodeName.CheckCondition);
}
Log(Severity.Verbose, "LUN {0}: Writing {1} blocks starting from LBA {2}", (ushort)lun, command.TransferLength, (long)command.LogicalBlockAddress64);
try
{
disk.WriteSectors((long)command.LogicalBlockAddress64, data);
response = new byte[0];
return(SCSIStatusCodeName.Good);
}
catch (ArgumentOutOfRangeException)
{
Log(Severity.Error, "Write error: LBA out of range");
response = FormatSenseData(SenseDataParameter.GetIllegalRequestLBAOutOfRangeSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
catch (IOException ex)
{
Log(Severity.Error, "Write error: {0}", ex.ToString());
response = FormatSenseData(SenseDataParameter.GetMediumErrorWriteFaultSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
}
/// <summary>
/// This implementation is not thread-safe.
/// </summary>
public override SCSIStatusCodeName ExecuteCommand(byte[] commandBytes, LUNStructure lun, byte[] data, out byte[] response)
{
SCSICommandDescriptorBlock command;
try
{
command = SCSICommandDescriptorBlock.FromBytes(commandBytes, 0);
}
catch (UnsupportedSCSICommandException)
{
Log(Severity.Error, "Unsupported SCSI Command (0x{0})", commandBytes[0].ToString("X"));
response = FormatSenseData(SenseDataParameter.GetIllegalRequestUnsupportedCommandCodeSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
return(ExecuteCommand(command, lun, data, out response));
}
/// <summary>
/// This implementation is not thread-safe.
/// </summary>
public SCSIStatusCodeName ExecuteCommand(SCSICommandDescriptorBlock command, LUNStructure lun, byte[] data, out byte[] response)
{
Log(Severity.Verbose, "Executing command: {0}", command.OpCode);
if (command.OpCode == SCSIOpCodeName.ReportLUNs)
{
uint allocationLength = command.TransferLength;
return(ReportLUNs(allocationLength, out response));
}
else if (lun >= m_disks.Count)
{
Log(Severity.Warning, "Initiator error: tried to execute command on LUN {0} which does not exist", lun);
response = FormatSenseData(SenseDataParameter.GetIllegalRequestInvalidLUNSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
else if (command.OpCode == SCSIOpCodeName.TestUnitReady)
{
return(TestUnitReady(lun, out response));
}
else if (command.OpCode == SCSIOpCodeName.RequestSense)
{
uint allocationLength = command.TransferLength;
return(RequestSense(lun, allocationLength, out response));
}
else if (command.OpCode == SCSIOpCodeName.Inquiry)
{
return(Inquiry((InquiryCommand)command, lun, out response));
}
else if (command.OpCode == SCSIOpCodeName.Reserve6)
{
return(Reserve6(lun, out response));
}
else if (command.OpCode == SCSIOpCodeName.Release6)
{
return(Release6(lun, out response));
}
else if (command.OpCode == SCSIOpCodeName.ModeSense6)
{
return(ModeSense6((ModeSense6CommandDescriptorBlock)command, lun, out response));
}
else if (command.OpCode == SCSIOpCodeName.ReadCapacity10)
{
return(ReadCapacity10(lun, out response));
}
else if (command.OpCode == SCSIOpCodeName.Read6 ||
command.OpCode == SCSIOpCodeName.Read10 ||
command.OpCode == SCSIOpCodeName.Read16)
{
return(Read(command, lun, out response));
}
else if (command.OpCode == SCSIOpCodeName.Write6 ||
command.OpCode == SCSIOpCodeName.Write10 ||
command.OpCode == SCSIOpCodeName.Write16)
{
return(Write(command, lun, data, out response));
}
else if (command.OpCode == SCSIOpCodeName.Verify10 ||
command.OpCode == SCSIOpCodeName.Verify16)
{
return(Verify(lun, out response));
}
else if (command.OpCode == SCSIOpCodeName.SynchronizeCache10)
{
return(SynchronizeCache10(lun, out response));
}
else if (command.OpCode == SCSIOpCodeName.ServiceActionIn16 &&
command.ServiceAction == ServiceAction.ReadCapacity16)
{
uint allocationLength = command.TransferLength;
return(ReadCapacity16(lun, allocationLength, out response));
}
else
{
Log(Severity.Error, "Unsupported SCSI Command (0x{0})", command.OpCode.ToString("X"));
response = FormatSenseData(SenseDataParameter.GetIllegalRequestUnsupportedCommandCodeSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
}
