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Message-ID: <20101006012509.GA3540@gondor.apana.org.au> Date: Wed, 6 Oct 2010 09:25:09 +0800 From: Herbert Xu <herbert@...dor.apana.org.au> To: Arnaud Ebalard <arno@...isbad.org> Cc: "David S. Miller" <davem@...emloft.net>, Eric Dumazet <eric.dumazet@...il.com>, Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>, netdev@...r.kernel.org Subject: Re: [PATCHv4 net-next-2.6 4/5] XFRM,IPv6: Add IRO remapping hook in xfrm_input() On Wed, Oct 06, 2010 at 01:28:42AM +0200, Arnaud Ebalard wrote: > > 1) First, current net-next-2.6 (no patches applied) > 2) then, with my patches applied and CONFIG_XFRM_SUB_POLICY enabled > 3) then, with my patches applied and CONFIG_XFRM_SUB_POLICY disabled To measure the effect of this properly you should use null encryption/hashing and look at the CPU utilisation with minimum packet sizes. > > With your remapping, would it be possible to add dummy xfrm_state > > objects with the remapped destination address that could then call > > xfrm6_input_addr? > > > > That way normal IPsec users would not be affected at all while > > preserving your new functionality. > > I don't think I can do that easily (at all?) with what XFRM provides, > can I? Or at least I don't see how it is possible because I would need > some kind of policy for the state to be applied and the only trigger I > see is the src/dst address mismatch when processing the IPsec packet. So do you know the remapped destination addresses a priori? If not then then other possibility would be to add the code hook in case of xfrm_state_lookup failure. But more importantly you need to solve the hash collission issue that I mentioned earlier. Without that it won't work at all. Cheers, -- Email: Herbert Xu <herbert@...dor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- 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
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