/// <summary>
/// Read data from memory window
/// </summary>
/// <param name="data"></param>
/// <param name="bufferDescriptor">Buffer Descriptor point to memory windows</param>
public NtStatus ReadMemoryWindow(byte[] data, RdmaBufferDescriptorV1 bufferDescriptor)
{
foreach (SmbdMemoryWindow mw in memoryWindowList)
{
if (mw.BufferDescriptor.Token != bufferDescriptor.Token)
{
continue;
}
// get memory window
if (mw.IsValid)
{
NtStatus status = (NtStatus)RdmaEndpoint.ReadFromMemory(mw.MemoryHandlerId, data);
return(status);
}
return(NtStatus.STATUS_INVALID_PARAMETER_2);
}
return(NtStatus.STATUS_INVALID_PARAMETER_2);
}
/// <summary>
/// Send data over RDMA
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public NtStatus SendData(byte[] data)
{
RdmaSegment sge = new RdmaSegment();
sge.Length = (uint)data.LongLength;
sge.MemoryHandler = 0;
// register memory
rdmaAdapter.RegisterMemory(sge.Length, out sge.MemoryHandler);
// Write data to memory
RdmaEndpoint.WriteToMemory(sge.MemoryHandler, data);
// send
UInt64 resultId;
NtStatus status = (NtStatus)rdmaEndpoint.Send(new RdmaSegment[] { sge }, out resultId);
if (status != NtStatus.STATUS_SUCCESS)
{
return(status);
}
// send request has been submitted
requestCount++;
rdmaNotificationSemaphore.Release();
// get the notification
SmbdRequestResult item = GetRequestResult(new TimeSpan(0, 0, 5), RequestType.Send);
this.LogEvent(string.Format("Send data with result id: 0x{0:X}. And get notification with id: 0x{1:X}, status: {2}",
resultId,
item.ResultId,
item.ResultInfo.Status
));
// deregister memory
rdmaAdapter.DeregisterMemory(sge.MemoryHandler);
return((NtStatus)item.ResultInfo.Status);
}
/// <summary>
/// Receive data over RDMA
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public NtStatus ReceiveData(TimeSpan timeout, out byte[] data)
{
SmbdRequestResult item = GetRequestResult(timeout, RequestType.Receive);
NtStatus status = (NtStatus)item.ResultInfo.Status;
if (status != NtStatus.STATUS_SUCCESS)
{
data = null;
return(status);
}
this.LogEvent(string.Format("Receive {0} bytes from entry 0x{1:X}",
item.ResultInfo.BytesTransferred,
item.EntryIndex));
data = new byte[item.ResultInfo.BytesTransferred];
status = (NtStatus)RdmaEndpoint.ReadFromMemory(
this.receiveEntries[item.EntryIndex].Segment.MemoryHandler,
data);
// reset
this.receiveEntries[receiveIndex].IsOccupied = false;
return(status);
}
