[ofa-general] [RFC] upstream IB router support

[Sean Hefty]

A while ago, some support was added to the rdma stack to support IB routers in a
very limited fashion (done as part of PathForward).  The relevant patches are
available at:

	git://git.openfabrics.org/~shefty/rdma-dev.git ib_router

I wanted to gauge interest merging these changes upstream for 2.6.25.  I know
there is growing interest in using IB routers.  Obsidian has a router, and both
Mellanox and QLogic adapters can be used to construct host routers.

The main disadvantage to merging the patches is that it slightly violates the IB
CM protocol by sending invalid data in the CM REQ.  The patches can be
optionally compiled in as experimental if needed.

- Sean