[openib-general] [PATCH][iWARP] Added provider CM verbs andquery provider methods

[Roland Dreier]

    Tom> Yes. I guess it's not obvious that the topics are
    Tom> related. Since our RDMA transport runs on top of TCP and
    Tom> since the RDMAC verbs spec requires that we have an LLP
    Tom> Handle (socket), we are dependent on the resolution of this
    Tom> issue.

Further: the desire to support RDMA could help reach a resolution.

It seems pretty clear that the recent Chelsio patches are not
acceptable (and I agree with that -- they clearly poke into deep parts
of the TCP stack that should not be exported).

Can someone come up with a better interface for handing over a TCP
connection from the kernel to an RDMA device?  Has anyone enumerated
exactly what TCP state is required for the handoff?  Is there a way to
build this interface so that it isn't hard to maintain and doesn't
constrain the evolution of the underlying host TCP stack?

 - R.