[Cake] cake srchost/dsthost stopped working?

[Pete Heist]

I ended up testing each of the keywords, with two src IPs then two dst
IPs, and I think everything makes sense:

https://www.heistp.net/downloads/cake-hostfair/cake-hostfair-patched.txt

I'm only not sure if we can tell from this test if triple-isolate is
doing what it should...

Pete

On Wed, 2021-08-04 at 22:49 +0200, Pete Heist wrote:
> Great, that seems to fix it. :) For sanity, I confirmed that I can
> apply/unapply the patch to fix/break it, so all seems well.
> 
> Is there anything that you'd want to make sure still works after the
> patch? I don't have any official regression tests to run, but with this
> setup ready I should be able to test something easily if needed...
> 
> Pete
> 
> On Wed, 2021-08-04 at 13:14 +0200, Toke Høiland-Jørgensen wrote:
> > Pete Heist <pete at heistp.net> writes:
> > 
> > > One more tip, reverting this commit seems to fix it:
> > > 
> > > https://github.com/torvalds/linux/commit/b0c19ed6088ab41dd2a727b60594b7297c15d6ce
> > 
> > Ah, I think I see what the problem is; could you please try the patch
> > below?
> > 
> > -Toke
> > 
> > diff --git a/net/sched/sch_cake.c b/net/sched/sch_cake.c
> > index 951542843cab..a83c4d4326da 100644
> > --- a/net/sched/sch_cake.c
> > +++ b/net/sched/sch_cake.c
> > @@ -720,7 +720,7 @@ static u32 cake_hash(struct cake_tin_data *q,
> > const struct sk_buff *skb,
> >  skip_hash:
> >         if (flow_override)
> >                 flow_hash = flow_override - 1;
> > -       else if (use_skbhash)
> > +       else if (use_skbhash && flow_mode & CAKE_FLOW_FLOWS)
> >                 flow_hash = skb->hash;
> >         if (host_override) {
> >                 dsthost_hash = host_override - 1;
> 
>