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

[Sean Hefty]

> My take ($0.02) on this is (at most) experimental if it is to be pushed
> upstream.

I agree.  I just didn't want to bother with this change without support 
for merging the changes upstream.

> The issue I see is how prestandard v. standard IB routers can be dealt
> with as cleanly as possible.

IMO, the risk is minimal.  The patches do not introduce any new 
protocols or SA attributes.  Visible changes are limited to setting the 
DLID field in the CM REQ message to an invalid value that the passive 
side keys off of to determine the correct value.  A node which does not 
support this would simply reject the connection with an invalid LID.

- Sean