[openib-general] RDMA_CM_EVENT_UNREACHABLE(-ETIMEDOUT)

[Sean Hefty]

Or Gerlitz wrote:
> Conceptually, do we agree that it would be better not to expose IB 
> reject code to the CMA consumers? that is in the spirit of the CMA being 
> a framework for doing connection management in RDMA transport 
> independent fashion, etc.

My concern is that I do not want to mask the real reason for the reject in a way 
that prevents the user from understanding what's needed to establish the 
connection.  A different way to view this is that the event provides the generic 
information, and the status detailed.

> The CMA does return **errno** values on the status field for some events 
> (eg with UNREACHABLE event as of REQ/REP timeout, as in the case that 
> started this thread...), so we need to decide a clearer approach here.

We can provide two status values with an event, one that maps to an errno, and 
another that maps to a transport specific reason.

- Sean