[rds-devel] Has anyone tried running RDS over 10GE / IWARP NICs ?

[Or Gerlitz]

On Thu, Apr 3, 2008 at 1:17 AM, Olaf Kirch <olaf.kirch at oracle.com> wrote:
> On Wednesday 02 April 2008 22:40:15 Richard Frank wrote:

>  Possibly the problem is in the bind() code. When you bind
>  to an address, you also bind to a transport at the same time.
>  The RDS/IB code checks for dev->type == ARPHRD_INFINIBAND
>  and I guess that's simply not true for iWARP NICs.
>  What's the proper procedure to identify those?

If the user calls bind(IP=ANY, some-port) you can't really bind to a transport
since you should be able to get connection requests from all transports! this
is implemented for example in stgt (ie it can get conn reqs from iscsi/tcp
and iser).

If the user calls bind(some-ip, some-port) you should call rdma_bind which is
synchronous (so the code is simple...) and if it returns success use the "IB"
(RDMA) transport if not use the TCP transport.

>  Also, we attach some RDS specific data to each IB interface we find
>  (via ib_client add/remove). Do these callbacks get invoked for iWARP
>  NICs, too?

yes, the callback are provided by the core layer and all the HW
drivers (both IB and iWARP)
register with the core (ib_core module, and don't get confused by the
name it supports all RDMA drivers)
so the ULP should get the callback no matter what the RDMA transport is.

Or