From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 741A23CFF52; Wed, 1 Apr 2026 09:35:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775036115; cv=none; b=aiLIaR/Fd2WKOyDpp1/1EAgXRzwjG3S9i4oo7TP10vBUFZwQAE+ZmxwGLezgVFby9X3ou4gRSjCAgJJQun37Ibto0T7Kmm5y3Jro7HScguqPpyTNWpR1bbhqVMZiFV1JZ+2J4VEixAPScCK5+1IenXIahywTTyFSetcYcBtd+ow= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775036115; c=relaxed/simple; bh=QzxIflZ+oz/bycGDcLj8Zfr+wikdgppxKnaozJwJvLY=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=iUEi/J3Nb336Tja3dzuCEeDAatq46iZc38g4zPSOGQLOD3qY8O9uNGEXa0l3tLPIRDBzKBgbsF8f84DoNNm2X7UNtjiLRHQty8USfgsm3e58T7iy2GzFcTf1XhlpMBH4DlInPrIhcUlgALzUlQtSKUQBb8nCcThzVdkzvQR4eJk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=desiato.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=db1cfZVi; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=desiato.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="db1cfZVi" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=MIME-Version:Content-Type:References: In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=QzxIflZ+oz/bycGDcLj8Zfr+wikdgppxKnaozJwJvLY=; b=db1cfZVi1rJxhnGpIE2/hJcls5 J6/M+kIAx+ONdQegERNitKepDPRZ7vlH0UoKuFf7wp6IAwp1ezfSJN8r+Ri9RMVkgSEq10ZvLZot3 J+5vMtxjuFB80IHp7pMahQYjRVlboOgXwqoKoPzENySZR/FxUSZJ91Q3CcpU92B4SAjIMNSV3Hf73 DWEzJb057o89Xm66uqOPPK4sybXR1ihmEglcFtXsXTBav3GKldN6JIQrv2MgUCsse92MonLXqaNrN VFJylgSGydIo89kj+DJdNH5L/Vogjt9JHZJyrPuUvFuCQSf54OvmyvBpbqlb/+ELHGDgJlmT1QKE7 keMtrWAQ==; Received: from [172.31.31.148] (helo=u09cd745991455d.ant.amazon.com) by desiato.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7ryR-0000000HYgu-205K; Wed, 01 Apr 2026 09:34:56 +0000 Message-ID: <1482b239f15ca9e27ccd0d533bf4c1a3032e2111.camel@infradead.org> Subject: Re: [PATCH 3/6] net: Guard Legacy IP entry points with CONFIG_LEGACY_IP From: David Woodhouse To: Eric Dumazet Cc: Saeed Mahameed , Leon Romanovsky , Tariq Toukan , Mark Bloch , Andrew Lunn , "David S. Miller" , 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 Date: Wed, 01 Apr 2026 10:34:55 +0100 In-Reply-To: References: <20260401074509.1897527-1-dwmw2@infradead.org> <20260401074509.1897527-4-dwmw2@infradead.org> Content-Type: multipart/signed; micalg="sha-256"; protocol="application/pkcs7-signature"; boundary="=-rXCFSJ5Hxf4X/mjvhH8o" User-Agent: Evolution 3.52.3-0ubuntu1.1 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by desiato.infradead.org. See http://www.infradead.org/rpr.html --=-rXCFSJ5Hxf4X/mjvhH8o Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2026-04-01 at 02:14 -0700, Eric Dumazet wrote: >=20 > >=20 > > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 /* Add UDP-Lite (RFC 3= 828) */ > > -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 udplite4_register(); > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 if (IS_ENABLED(CONFIG_LEGACY_IP)) > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 udplite4_register(); >=20 > udplite has been removed in net-next. >=20 > I would think your patch series is net-next material ? A more conservative variant of the patch series on another day of the year, sure. It also probably wants to land after=20 https://lore.kernel.org/lkml/20260310153506.5181-1-fmancera@suse.de/ turns CONFIG_IPV6 into a boolean. I'll need to take a closer look at CONFIG_INET too; it ends up being possible to configure with INET && !LEGACY_IP && !IPV6 which isn't a combination that makes sense (and I obviously didn't test).=20 As discussed, some of this series *is* realistic for another day, and I'll happily work on whatever direction we think makes sense. --=-rXCFSJ5Hxf4X/mjvhH8o Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCD9Aw ggSOMIIDdqADAgECAhAOmiw0ECVD4cWj5DqVrT9PMA0GCSqGSIb3DQEBCwUAMGUxCzAJBgNVBAYT AlVTMRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5jb20xJDAi BgNVBAMTG0RpZ2lDZXJ0IEFzc3VyZWQgSUQgUm9vdCBDQTAeFw0yNDAxMzAwMDAwMDBaFw0zMTEx MDkyMzU5NTlaMEExCzAJBgNVBAYTAkFVMRAwDgYDVQQKEwdWZXJva2V5MSAwHgYDVQQDExdWZXJv a2V5IFNlY3VyZSBFbWFpbCBHMjCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMjvgLKj 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