option directive and turning on AOE

[Andre Oppermann]

Peter Wemm wrote:
> 
> On Tuesday 31 August 2004 03:28 pm, Andre Oppermann wrote:
> > Brooks Davis wrote:
> > > On Tue, Aug 31, 2004 at 02:27:33PM -0600, Scott Long wrote:
> > > > Sam wrote:
> > > > >I've added code to if_ethersubr.c:/ether_demux/
> > > > >to queue up AoE frames as they appear.  I followed
> > > > >suit with other protocols and included my addition
> > > > >inside of an #ifdef AOE.  Where do I turn this on?
> > > > >I thought perhaps just adding an 'option AOE' to
> > > > >the config would do it, but it doesn't -- so clearly
> > > > >I don't understand how the option directive works.
> > > > >The config man page doesn't talk about option/device
> > > > >directives ...
> > > > >
> > > > >I'm still looking, but a clue would be well received.
> > > >
> > > > Did you modify /sys/conf/options to tell it about your
> > > > AOE option?  If so, then you should have specified the name
> > > > of a header file that the option would be #define'd into.
> > > > Include that header file in if_ethersubr.c and you should
> > > > have no problems.
> > > >
> > > > Incidentally, this might be an area when netgraph would be
> > > > useful.  Instead of having an AoE specific hook in the
> > > > stack, you could have an AoE netgraph module that uses the
> > > > existing netgraph hooks.  It's just an idea, though.
> > >
> > > Another option might be a PFIL hook.  There isn't one there now,
> > > but I think I've seen talk of adding one.  Actually, if we did
> > > that, we could get most of the netgraph specific hooks out of the
> > > ethernet code.
> >
> > What is AoE?  And what kind of Frames does it come in?
> 
> ATA-over-Ethernet?
> http://news.gw.com/freebsd.arch/12939
> (Ethernet frame type 0x88a2 apparently)

Ok, I see.  However plugging in using PFIL_HOOKS is not an option here
because at the moment they only work for IP packets and not for ethernet
frames.

-- 
Andre