netdev - Re: [IPSEC] flow: Cache negative results

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Message-ID: <20070110204922.GA1652@gondor.apana.org.au>
Date:	Thu, 11 Jan 2007 07:49:22 +1100
From:	Herbert Xu <herbert.xu@...hat.com>
To:	Venkat Yekkirala <vyekkirala@...stedcs.com>
Cc:	'James Morris' <jmorris@...ei.org>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	Paul Moore <paul.moore@...com>
Subject: Re: [IPSEC] flow: Cache negative results

On Wed, Jan 10, 2007 at 11:41:07AM -0600, Venkat Yekkirala wrote:
> 
> Only, on a security policy denial (-ESRCH from the LSM hook), a 0
> is returned by the resolver to signify no applicable policy since
> a negative result is akin to no policy. And I see the "no policy"
> case is already cached.

I'm not talking about an xfrm policy lookup failure, that exists
with or without SELinux.  I'm talking about an error returned from
security_xfrm_policy_lookup(), i.e., whether a policy can be used
or not.  For that case, we only cache positive results currently.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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