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Date: Mon, 2 Jan 2012 18:28:28 +1100 From: Herbert Xu <herbert@...dor.apana.org.au> To: David Ward <david.ward@...mit.edu> Cc: netdev@...r.kernel.org Subject: Re: [PATCH net-next] xfrm: Call IP receive handler directly for inbound tunnel-mode packets On Sun, Jan 01, 2012 at 10:32:34PM -0500, David Ward wrote: > For IPsec tunnel mode (or BEET mode), after inbound packets are xfrm'ed, > call the IPv4/IPv6 receive handler directly instead of calling netif_rx. > In addition to avoiding unneeded re-processing of the MAC layer, packets > will not be received a second time on network taps. (Note that outbound > packets are only received on network taps post-xfrm, but inbound packets > were being received both pre- and post-xfrm. So now network taps will > receive packets in either direction only once, in the form that they go > "over the wire".) > > Signed-off-by: David Ward <david.ward@...mit.edu> > Cc: Herbert Xu <herbert@...dor.apana.org.au> You can't do this as this may cause stack overruns if we nest too deeply. Changing the existing tap processing behaviour will also break existing setups. 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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