[ofw] port RDS to OFW - request for input...

Tzachi Dar tzachid at mellanox.co.il
Thu Jul 23 15:11:35 PDT 2009


 

> -----Original Message-----
> From: ofw-bounces at lists.openfabrics.org 
> [mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of Smith, Stan
> Sent: Friday, July 24, 2009 12:22 AM
> To: Hefty, Sean; Richard Frank; ofw at lists.openfabrics.org
> Subject: RE: [ofw] port RDS to OFW - request for input...
> 
> Hefty, Sean wrote:
> >> How is it that a kernel interface to IBAT would not solve 
> the address 
> >> resolution problem?
> >
> > IBAT looks like it can do:
> >
> > local IP <-> local port
> > remote MAC <-> remote GID
> > local port, remote MAC -> path record
> >
> > We need to get to:
> >
> > remote IP -> local IP, remote GID
> >
> > It's not clear to me looking at ib_at_ioctl.h that it can 
> do this, but 
> > maybe the interface can be extended to provide this 
> functionality if 
> > it doesn't.
> >
> > - Sean
> 
> PrintIP.c does an ARP 'remote IP', then Gets MAC then remote GID.
> This could be done from kernel mode?

This can be done in kernel mode in a dirty way, that is send the arps
yourself. Theoreticly simple but practicly this is hard, because of
issues like retries, shutdown, reset etc.

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