Re: [PATCH 00/22] RFC: Allow configuration of special case NATs

[David Gibson <david@gibson.dropbear.id.au>]

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On Fri, Aug 16, 2024 at 05:03:22PM +0200, Stefano Brivio wrote:
> On Fri, 16 Aug 2024 16:45:14 +0200
> Paul Holzinger <pholzing@redhat.com> wrote:
> 
> > Hi,
> > 
> > On 16/08/2024 07:39, David Gibson wrote:
> > > Based on Stefano's recent patch for faster tests.
> > >
> > > Allow the user to specify which addresses are translated when used by
> > > the guest, rather than always being the gateway address or nothing.
> > > We also allow this remapping to go to the host's global address (more
> > > precisely the address assigned to the guest) rather than just host
> > > loopback.
> > >
> > > Suggestions for better names for the new options in patches 20 & 22
> > > are most welcome.
> > >
> > > Along the way to implementing that make many changes to clarify what
> > > various addresses we track mean, fixing a number of small bugs as
> > > well.
> > >
> > > NOTE: there is a bug in 21/22 which breaks some of the passt_tcp perf
> > > tests.  I haven't managed to figure out why it's causing the problem,
> > > or even what the exact triggering conditions are (running the single
> > > stalling iperf alone doesn't do it).  Have to wrap up for today, so I
> > > thought I'd get this out for review anyway.
> > >
> > > Paul, amongst other things, I think this will allow podman to
> > > (finally) nicely address #19213, picking an address to remap to the
> > > host's external address with --nat-guest-addr, much like it already
> > > uses --dns-forward.  
> > 
> > Thanks this looks promising. I will try to test it out next week.
> > 
> > No strong feelings about the naming but how about s/--nat/--map/ for the 
> > options?
> 
> Exactly the same as I suggested offline a while ago. :) I think it's
> easier to understand what it does, that way.

Ok.  I think I was going to do that originally but changed it for
reasons that I've now forgotten.  --map is more consistent with
--no-map-gw too, so I'll change this.

-- 
David Gibson (he or they)	| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you, not the other way
				| around.
http://www.ozlabs.org/~dgibson

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