[openib-general] [RFC] IB address translation using ARP

[Hal Rosenstock]

On Wed, 2005-09-28 at 21:26, Sean Hefty wrote:
> Here's a first attempt at an API / implementation (that compiles only) for
> an address translation module for IB using ARP.  The code should check the
> ARP cache for information, but is missing the actual ARP processing.

Where would the path record lookup subsequent to the ARP go ? It would
be here as well prior to the connect, right ?

> (We should be able to pull that from ib_at.)

or sdp_link which has the more temporal netdev references currently :-)

> The API is similar to the route
> portion of ib_at, but corrects issues with canceling requests.

What are you referring to here ?

> Only the destination IP address is required for input.
> 
> The intent is that the CMA will use this service to locate the
> proper RDMA device GUID

This is the outgoing device, right ?

>  and port to use in establishing a connection.
> Hopefully, this makes it clearer how I envision address translation wrt
> the CMA.

When/if there are multiple paths, how is the selection performed ?

Also, on the passive side, would a rdma_resolve_route also be done or
something else or wouldn't just a path lookup suffice here ? If it is
the latter, is that hidden under the rdma_accept or handled otherwise ?

-- Hal