Michael S. Tsirkin wrote:
Fine, but rdma_reject will have to alter the state then, to avoid RTU
after REJ.

It should be able to work just as it does for userspace. The user either calls accept or reject. The IB CM will not send an RTU if a REJ has been sent.

I think that the real issue here is that the CMA determines whether to hand the REP to the user based on if it has a QP. This was done to support userspace. SDP wants the CMA to manage its QP, but still wants to see the REP. What I need to determine is if it's easier/better for SDP to manage the QP itself, or to change the CMA to expose the REP when it manages the QP states.

- Sean
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