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

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Message-Id: <200902181005.24952.paul.moore@hp.com>
Date:	Wed, 18 Feb 2009 10:05:24 -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 02:23:24 am etienne wrote:
> ... anyway, I think the cleanest way would be to, well, sort smk_netlbladdr
> by mask on insertion (perf doesn't matter  here) and this way
> smack_host_label can stop the loop on first match. Plus, it would give a
> nicer /smack/netlabel ouptut :)

Agreed.

> so, how should we handle it? apply the patches (with whitespaces damages
> corrected ;) )  now (as it corrects a bug) an elaborate the cleaner way
> later?

Well, since you have some time and willingness to do things "the right way" I 
would recommend dropping these patches (which are really just band-aids) and 
working on the right solution to stored the addresses/masks in a sorted list 
with the mask already applied.

FWIW, the NetLabel code (net/netlabel) has to do very similar things with 
sorted address lists so I built an address list construct which builds on the 
list.h ideas and operates in a similar way.  You may find it helpful.

> I think this should go to stable too?

I would worry about getting the patches developed, tested and in an acceptable 
form first, then we can worry about where they should be applied ;)

-- 
paul moore
linux @ hp

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