option directive and turning on AOE

[Brooks Davis]

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.

-- Brooks

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