[openib-general] RDMA_CM_EVENT_UNREACHABLE(-ETIMEDOUT)

[Or Gerlitz]

Sean Hefty wrote:
> 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.

So you are fine with the CMA consumer being aware to the RDMA transport 
up to the extent of having a per transport reject codes handler?

>> 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.

This sounds much better.

Or.