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Date: Tue, 12 Jun 2012 08:32:38 -0400 From: Neil Horman <nhorman@...driver.com> To: David Miller <davem@...emloft.net>, netdev@...r.kernel.org Subject: Re: [PATCHv2 net-next] ipv4: Add interface option to enable routing of 127.0.0.0/8 On Tue, Jun 12, 2012 at 07:31:15AM -0400, Thomas Graf wrote: > On Tue, Jun 12, 2012 at 07:14:44AM -0400, Neil Horman wrote: > > Just out of curiosity, would it be more efficient to implement this by > > optionally adding a prohibit route to the local table for 127.0.0.0/8 to every > > interface that was brought up, based on weather or not that interfaces > > route_localnet bool was true or not? It would save the additional checks in the > > routing path I think. Not sure how much a savings that is, but I thought I > > would ask. > > It's not that simple because we also use the local table for source > address selection and local address verification. So we would have to > exclude/include such routes conditionally based on some route lookup > purpose indicator. Such a prohibit route would have to be valid only > in the output context. ah, understood, so that doesn't really save us anything, it just moves the point at which we do the check. Acked-by: Neil Horman <nhorman@...driver.com> > -- > 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 > -- 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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