linux-kernel - Re: [PATCH] SMACK netfilter smacklabel socket match

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Message-Id: <200902181555.14738.paul.moore@hp.com>
Date:	Wed, 18 Feb 2009 15:55:14 -0500
From:	Paul Moore <paul.moore@...com>
To:	etienne <etienne.basset@...ericable.fr>
Cc:	Casey Schaufler <casey@...aufler-ca.com>,
	"Linux-Kernel" <linux-kernel@...r.kernel.org>,
	linux-security-module@...r.kernel.org
Subject: Re: [PATCH] SMACK netfilter smacklabel socket match

On Wednesday 18 February 2009 02:35:00 pm etienne wrote:
> Casey Schaufler wrote:
> > Yes, it would make it nicer. You'll need to do a better job
> > on the list management than I've been doing. It's probably well
> > past time to introduce the Standard list management scheme to
> > Smack, and you'll need to do so if you want to do insertions
> > and/or deletions.
>
> well, we could maybe do that for smack_netlbladdrs.
> for smk_rules, i don't know, depending to the use case, it could grow
> bigger and thus need a more efficient scheme than linked-list like
> hash-table.

The code is easily changed because it is private to Smack and we don't have to 
worry about backwards compatibility issues.  I would focus on improving the 
linked list approach (masked, sorted, etc.) and when traversing the list 
becomes a bottleneck we can look at alternative approaches.  Others may have a 
better view, but from what I've seen the general approach taken in Linux 
Kernel optimization is to develop something that works then refine and 
optimize it once you have a better understanding of the common use cases.  

-- 
paul moore
linux @ hp

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