Re: [PATCH nf-next 1/6] netfilter: nf_tables: extend tracing infrastructure

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On Tue, Nov 24, 2015 at 11:28:41AM +0100, Florian Westphal wrote:
> Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> wrote:
> > BTW, do we really want to use the default NFNLGRP_NFTABLES group?
> > 
> > multicast group provide a simple way for filtering out what you don't
> > need from kernelspace. And you can still subscribe both groups
> > NFNLGRP_NFTABLES and NFNLGRP_NFTABLES_TRACE.
> > 
> > I'm telling this when thinking of nft-sync. Why should it be receiving
> > this spamming tracing events when it only cares about ruleset updates?
> 
> I can add a new group but nftables will need to subscribe to both
> in trace mode since we need to see new rules...

I'm talking about applications that may not need to subscribe both,
eg. nft-sync will only need to subscribe to rule updates, he doesn't
care about traces.

I think nft should have the ability to subscribe only rule updates
only as well.

You can subscribe as many groups at the same time in netlink as you want.
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