From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Daniel Borkmann <daniel@iogearbox.net>
Cc: davem@davemloft.net, netdev@vger.kernel.org,
Alexei Starovoitov <ast@kernel.org>
Subject: Re: [PATCH net-next] netfilter: revert introduction of egress hook
Date: Wed, 18 Mar 2020 10:51:49 +0100 [thread overview]
Message-ID: <20200318095149.stvs27fj2whir2x5@salvia> (raw)
In-Reply-To: <97a81974-5063-ed3d-8ad4-9f7ff3aa0908@iogearbox.net>
On Wed, Mar 18, 2020 at 10:41:30AM +0100, Daniel Borkmann wrote:
> On 3/18/20 10:36 AM, Pablo Neira Ayuso wrote:
> > On Wed, Mar 18, 2020 at 10:33:22AM +0100, Daniel Borkmann wrote:
> > > This reverts the following commits:
> > >
> > > 8537f78647c0 ("netfilter: Introduce egress hook")
> > > 5418d3881e1f ("netfilter: Generalize ingress hook")
> > > b030f194aed2 ("netfilter: Rename ingress hook include file")
> > >
> > > From the discussion in [0], the author's main motivation to add a hook
> > > in fast path is for an out of tree kernel module, which is a red flag
> > > to begin with. Other mentioned potential use cases like NAT{64,46}
> > > is on future extensions w/o concrete code in the tree yet. Revert as
> > > suggested [1] given the weak justification to add more hooks to critical
> > > fast-path.
> > >
> > > [0] https://lore.kernel.org/netdev/cover.1583927267.git.lukas@wunner.de/
> > > [1] https://lore.kernel.org/netdev/20200318.011152.72770718915606186.davem@davemloft.net/
> > >
> > > Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
> >
> > Nacked-by: Pablo Neira Ayuso <pablo@netfilter.org>
> >
> > Daniel, you must be really worried about achieving your goals if you
> > have to do politics to block stuff.
>
> Looks like this is your only rationale technical argument you can come
> up with?
I have waited for two days and I got no feedback from you.
Moreover, your concerns on performance has been addressed: Performance
impact is negligible.
Then, you popped up more arguments, like a reference to an email from
17 years ago, where only iptables was available and the only choice to
add ingress/egress filtering was to make another copy and paste of the
iptables code.
I also explained how to use this egress hook in Netfilter.
What's missing on your side?
next prev parent reply other threads:[~2020-03-18 9:51 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-18 9:33 [PATCH net-next] netfilter: revert introduction of egress hook Daniel Borkmann
2020-03-18 9:36 ` Pablo Neira Ayuso
2020-03-18 9:41 ` Daniel Borkmann
2020-03-18 9:51 ` Pablo Neira Ayuso [this message]
2020-03-18 10:02 ` Florian Westphal
2020-03-18 10:50 ` Daniel Borkmann
2020-03-18 12:33 ` Florian Westphal
2020-03-18 14:22 ` Daniel Borkmann
2020-03-19 1:45 ` David Miller
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