[openib-general] [RFC] [PATCH 1/3] RDMA CM: addrdma_get/set_optioncalls to get/set path records

[Sean Hefty]

Caitlin Bestler wrote:
>>* Bind to a device based on IB specific addresses (e.g. GIDs).
>>* Getting usable path records between two nodes.
>>* Setting primary and alternate paths for a connection.
>>* Modify an alternate path for a connection.
>>* Joining a multicast group identified by an IP address.
>>* Leaving a multicast group identified by an IP address.
>>* Joining a multicast group identified by an MCMemberRecord.
>>* Leaving a multicast group identified by an MCMemberRecord.
> 
> But on the latter set, aren't there already UDP interfaces that
> supply that supply the required controls?

There's no easy way to do this from userspace.  I'm suggesting that this 
functionality be exposed through the rdma_cm, rather than exposing the kernel 
APIs through a separate kernel modules and libraries.

- Sean