[ofa-general] Re: iWARP peer-to-peer CM proposal

[Steve Wise]

Kanevsky, Arkady wrote:
> Agree with initiator/client sending signalled 0B RDMA Read.
> This will handle client side.
> 
> Still not 100% clear on passive/server side.
> Two issues which bothers me.
> 1. Is "bogus" S-tag allowed for incomming RDMA ops?

The stag/to must not be validated if the incoming read is 0B length.

http://www.ietf.org/rfc/rfc5040.txt:

> *  If the Data Source receives an RDMA Read Request Header with the
>       RDMA Read Message Size set to zero, the Data Source RDMAP:
> 
>       *  MUST NOT validate the Data Source STag and Data Source Tagged
>          Offset contained in the RDMA Read Request Header, and
> 
>       *  MUST respond with a zero-length RDMA Read Response Message.
>