From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5F4E62DEA95; Thu, 2 Apr 2026 20:27:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775161665; cv=none; b=pntrjYWW/Hgpk+ZLKtSyPAijfjrWeuKmm18sPh++jBriUXCbW7iXOZq1VbvtsCh0cZDxyenFoLpSGBq2NabmNu9JyvMxexMa2meip6MPjIOG9OOWPGIsm44yZuxQ2Xx06a5cE0DzDahGa7OTLGKdaXjP3OipoVLhI1gRk31Nfj0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775161665; c=relaxed/simple; bh=R2bUXwoiNKI+i8fhmS1mEypi+5XEE/H8JRhMIiJEbro=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=CPMurbJnx3AJzFrZTM9QOy07KG6Vux3i5kC+oqwsIzFUJPQyBwG5M3lvPm5bhgKE1vKOJlpX9UDVV6vO1UOq0m7ryFciUDP7Ogb76+6vjh9VPYEGAw5biaVE31XLfg+rrrUlro4vrK24Qx+K2gqzQVvonwKequAhP/Str6SLiss= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cQ1JVW3k; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="cQ1JVW3k" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 88DD2C116C6; Thu, 2 Apr 2026 20:27:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775161664; bh=R2bUXwoiNKI+i8fhmS1mEypi+5XEE/H8JRhMIiJEbro=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=cQ1JVW3kZ4q6yf/mrMXMcUmXb/SpqVqWgSGhAro2e6sakjWIO86wX+hLGyma+i3sQ zaRhaZLvr17NAdzRwaGEP+PSyz4ljYkGQtNf5OQXtI75Z+nyaA/H8bQkkSlwA2wlrV Wo8PesnE5LHxozZUlED43qosmVFTZmfwEAOSp8TEuCJh5J7ZAJ7Mnz+TsM6P45WLGT M+0j4JWhhRwjW7dRoK6F5CzU7AigiKguXJGZKt3EjrzHWe+rT3ipjNOhBesz9AYRxb H7HyqrsSyhHtW6dKYVG0oNwbTqHNRPuTCJsBK+BKS1oYCezp0qiFYW9uC5yN1he7Sp 0K5mLfjwRIQFg== Date: Thu, 2 Apr 2026 22:27:32 +0200 From: Mauro Carvalho Chehab To: David Woodhouse Cc: Fernando Fernandez Mancera , Saeed Mahameed , Leon Romanovsky , Tariq Toukan , Mark Bloch , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Nikolay Aleksandrov , Ido Schimmel , Martin KaFai Lau , Daniel Borkmann , John Fastabend , Stanislav Fomichev , Alexei Starovoitov , Andrii Nakryiko , Eduard Zingerman , Song Liu , Yonghong Song , KP Singh , Hao Luo , Jiri Olsa , Kuniyuki Iwashima , Willem de Bruijn , David Ahern , Neal Cardwell , Johannes Berg , Pablo Neira Ayuso , Florian Westphal , Phil Sutter , Guillaume Nault , Kees Cook , Alexei Lazar , Gal Pressman , Paul Moore , netdev@vger.kernel.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, oss-drivers@corigine.com, bridge@lists.linux.dev, bpf@vger.kernel.org, linux-wireless@vger.kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, torvalds@linux-foundation.org, jon.maddog.hall@gmail.com Subject: Re: [PATCH 0/6] Deprecate Legacy IP Message-ID: <20260402222558.6fe9bc0d@foz.lan> In-Reply-To: <2cb91533e22ed6cb11205dbc56b8aeedbbce0cca.camel@infradead.org> References: <20260401074509.1897527-1-dwmw2@infradead.org> <42caa438-3854-449c-b0ee-4f40772e5c1b@suse.de> <2cb91533e22ed6cb11205dbc56b8aeedbbce0cca.camel@infradead.org> X-Mailer: Claws Mail 4.3.1 (GTK 3.24.51; x86_64-redhat-linux-gnu) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Wed, 01 Apr 2026 09:25:08 +0100 David Woodhouse wrote: > On Wed, 2026-04-01 at 10:07 +0200, Fernando Fernandez Mancera wrote: > > =C2=A0 > >=20 > > Dammit, you've beaten me to it! This was my next step for 7.2. > >=20 > > Fully-endorsed-by: Fernando Fernandez Mancera =20 >=20 > Yeah. The date notwithstanding,=20 You tricked me on this April fools day... Very funny! > I do actually think we should do most > of this for real. >=20 > Maybe we don't get away with the actual deprecation and the warnings on > use *just* yet, and *maybe* we won't even get away with calling the > config option CONFIG_LEGACY_IP, although I would genuinely like to see > us moving consistently towards saying "Legacy IP" instead of "IPv4" > everywhere. IPv4 is not legacy yet... Lots of configurations, service providers and corporations that requires the usage of VPN are IPv4 only still today. For instance, my paid VPN provider only grants IPv4 addresses (at least for those not using their proprietary software). >=20 > But we *should* clean up the separation of CONFIG_INET and > CONFIG_IPV[64] and make it possible to build with either protocol > alone. That makes sense on my eyes. Thanks, Mauro