[LARTC] [ANNOUNCE] ESFQ for Linux 2.6.19.2 (with jhash!)

[Andy Furniss]

Corey Hickey wrote:
> ESFQ's original hashing algorithm never worked particularly well for the
> src or dst hash types: close IP addresses, such as 10.0.0.1 and 10.0.0.2
> often hashed to the same number, even with many different perturbation
> values. This prevented the src and dst hash types from working
> adequately with small and medium-sized network ranges.
> 
> A while ago, I added the src_direct and dst_direct hash types in an
> effort to work around the collision problem. The direct hash types were
> collision-free if handled properly. Unfortunately, they only worked
> properly for relatively small ranges of input, and as such required some
> care in usage.
> 
> I have now (finally) converted ESFQ to use jhash, which is far easier to
> use than I had ever thought. Collisions are still possible with jhash,
> but they occur evenly, regardless of input range or distribution--as it
> should be. When perturbation values are used, 10.0.0.1 and 10.0.0.2 are
> just as likely to collide as 1.2.3.4 and 56.78.90.123.
> 
> The src_direct, dst_direct, and fwmark_direct hash type hacks are no
> longer useful, and I intend to deprecate them in the next release. Send
> me an email if you have a reason I should leave the *_direct hash types
> alone.
> 
> Home page:
> http://fatooh.org/esfq-2.6/
> 
> Direct URL:
> http://fatooh.org/esfq-2.6/esfq-2.6.19.2.tar.gz
> 
> README (also available in the tar.gz):
> http://fatooh.org/esfq-2.6/current/README
> 
> Try it out, have fun, and if you find a bug or have a suggestion please
> send me an email.

Cool - I'll try this once I get upto date.

I notice the 2.6.20 version can get unnatted addresses - will/can this 
be made to work for ingress on ifb?

Andy.