[openib-general] Re: port_num

[Tom Tucker]

On Thu, 2006-03-16 at 01:39 +0200, Michael S. Tsirkin wrote:
> Quoting Tom Tucker <tom at opengridcomputing.com>:
> > > I think the CMA needs to manage its port spaces.  I'm just not sure yet how
> > > to do this in a way that works for iWarp yet.  And it hasn't been a high
> > > enough priority for me to go back and create a patch for it.  It sounds like
> > > I need to revisit this soon though...
> > 
> > I agree...and I have an idea of how to do it too (see
> > inet_csk_get_port). If we could only get this core support in the
> > trunk... ;-)
> 
> OK, so if we all agree bind with port 0 will select a free one,
> I'll proceed with this assumption and Sean will code up the IB part,
> iWarp part won't be a problem when its merged.
> 
Actually, iWARP will need to use this service too. The reason is that
most iWARP adapters are also Ethernet interfaces (i.e. "converged
NICs"). So in order to be keep the host TCP and iWARP port spaces from
clobbering each other, the iWARP side needs to allocate a port via
inet_csk_get_port.