private void InterceptReadCapacity16(LogicalUnit logicalUnit, byte[] commandBytes, byte[] response)
{
ReadCapacity16Parameter parameter = new ReadCapacity16Parameter(response);
logicalUnit.BlockSize = parameter.BlockLengthInBytes;
Log(Severity.Verbose, "LUN: {0}, BlockSize updated to {1}", logicalUnit.AssociatedLun, logicalUnit.BlockSize);
}
/// <returns>Capacity in bytes</returns>
public ulong ReadCapacity(ushort LUN, out int bytesPerSector)
{
if (!m_isConnected)
{
throw new InvalidOperationException("iSCSI client is not connected");
}
SCSICommandPDU readCapacity = ClientHelper.GetReadCapacity10Command(m_session, m_connection, LUN);
SendPDU(readCapacity);
// SCSIResponsePDU with CheckCondition could be returned in case of an error
SCSIDataInPDU data = WaitForPDU(readCapacity.InitiatorTaskTag) as SCSIDataInPDU;
if (data != null && data.StatusPresent && data.Status == SCSIStatusCodeName.Good)
{
ReadCapacity10Parameter capacity = new ReadCapacity10Parameter(data.Data);
if (capacity.ReturnedLBA != 0xFFFFFFFF)
{
bytesPerSector = (int)capacity.BlockLengthInBytes;
return((capacity.ReturnedLBA + 1) * capacity.BlockLengthInBytes);
}
readCapacity = ClientHelper.GetReadCapacity16Command(m_session, m_connection, LUN);
m_clientSocket.Send(readCapacity.GetBytes());
data = WaitForPDU(readCapacity.InitiatorTaskTag) as SCSIDataInPDU;
if (data != null && data.StatusPresent && data.Status == SCSIStatusCodeName.Good)
{
ReadCapacity16Parameter capacity16 = new ReadCapacity16Parameter(data.Data);
bytesPerSector = (int)capacity16.BlockLengthInBytes;
return((capacity16.ReturnedLBA + 1) * capacity16.BlockLengthInBytes);
}
}
bytesPerSector = 0;
return(0);
}
public SCSIStatusCodeName ReadCapacity16(LUNStructure lun, uint allocationLength, out byte[] response)
{
if (lun >= m_disks.Count)
{
response = FormatSenseData(SenseDataParameter.GetIllegalRequestInvalidLUNSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
ReadCapacity16Parameter parameter = new ReadCapacity16Parameter(m_disks[lun].Size, (uint)m_disks[lun].BytesPerSector);
response = parameter.GetBytes();
// we must not return more bytes than ReadCapacity16.AllocationLength
if (response.Length > allocationLength)
{
response = ByteReader.ReadBytes(response, 0, (int)allocationLength);
}
return(SCSIStatusCodeName.Good);
}
