[ofiwg] definition of a completion in OFI

[Hefty, Sean]

> I'll check the iwarp specs again for similar wording.

And for more fun...

>From rdmap-v1.0:

A Send or RDMA Write Message MUST NOT be considered Complete at
the Local Peer (Data Source) until it has been successfully
completed at the DDP layer.

ddp-v1.0:

At the Data Source, DDP Message transfer is considered completed
when the reliable, in-order transport LLP has indicated that the
transfer will occur reliably. Note that this in no way restricts the
LLP from buffering the data at either the Data Source or Data Sink.
Thus at the Data Source, completion of a DDP Message does not
necessarily mean that the Data Sink has received the message.