netdev - Re: [Patch iproute2] u32: add terminal parameter

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 15 Apr 2014 09:00:18 -0400
From:	Jamal Hadi Salim <jhs@...atatu.com>
To:	Cong Wang <xiyou.wangcong@...il.com>
CC:	Stephen Hemminger <stephen@...workplumber.org>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [Patch iproute2] u32: add terminal parameter

On 04/14/14 21:57, Cong Wang wrote:

> So essentially why u32 filters can't just do matching without bothering

u32 is a special animal. You can actually have intermediate nodes
which are _not_ terminal. i.e you can build a tree of hashes which
interconnect other hashes eventually leading to terminal nodes.

> classid especially when they are attached to an ingress qdisc? I still
> fail to see a reason why I have to care about classid here.

It is more of a historical artifact with "benefits".
Historical in that egress qdiscs with classes existed before ingress;
so it makes sense to keep the syntax people are already familiar with.
Benefits because infact with the right approach the flowid even at
ingress can be used as input(look at the route classifier for example
and association with route accounting of the source).

cheers,
jamal

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html