Re: [PATCH net-next v1] netfilter: nfnetlink: convert kfree_skb to consume_skb

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On Mon, Jun 03, 2024 at 10:19:27AM +0100, Donald Hunter wrote:
> Simon Horman <horms@xxxxxxxxxx> writes:
> 
> > On Tue, May 28, 2024 at 11:37:54AM +0100, Donald Hunter wrote:
> >> Use consume_skb in the batch code path to avoid generating spurious
> >> NOT_SPECIFIED skb drop reasons.
> >> 
> >> Signed-off-by: Donald Hunter <donald.hunter@xxxxxxxxx>
> >
> > Hi Donald,
> >
> > I do wonder if this is the correct approach. I'm happy to stand corrected,
> > but my understanding is that consume_skb() is for situations where the skb
> > is no longer needed for reasons other than errors. But some of these
> > call-sites do appear to be error paths of sorts.
> >
> > ...
> 
> Hi Simon,
> 
> They all look to be application layer errors which are either
> communicated back to the client or cause a replay. My understanding is
> that consume_skb() should be used here since kfree_skb() now implies a
> (transport?) drop.

Hi Donald,

Thanks, that makes sense to me.




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