From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5E9F6C2D0E5 for ; Wed, 25 Mar 2020 17:57:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3591F206F6 for ; Wed, 25 Mar 2020 17:57:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="PJPXcwrs" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727358AbgCYR5D (ORCPT ); Wed, 25 Mar 2020 13:57:03 -0400 Received: from mail-pl1-f193.google.com ([209.85.214.193]:35681 "EHLO mail-pl1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727357AbgCYR5D (ORCPT ); Wed, 25 Mar 2020 13:57:03 -0400 Received: by mail-pl1-f193.google.com with SMTP id g6so1106557plt.2; Wed, 25 Mar 2020 10:57:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to; bh=LcnFLGNBmm0IVLGhfPKr1/VuZRnu6FpgzCF+UvqP0dg=; b=PJPXcwrs1iBQ1K6mKKHgQyRGiROzE6kyMNZhGg2cDVCU7kiEafl+1O7Qhv3DPSIz8p Xmai1C2uEmOPLBPJ+I4SsZ2xDYM+eWewEDVUKZCwlEPAv7SSIqYfscn/sW7/d+5i+4IX xNWNWVrZDm8dPLm+J1sWqdMqP7rSiY5Ci53HJcwjUuaYX1nFaEYKWa2XV7CeQBCfzykv eMS4GRn0MKb1EyoprRgCk+X+I3bjO9LcJPKMrDrQN7wjKa8SoH6n3atjxeX2bFvI4BlV wE8xR/RnpU5HAncKphVv2vXTj10fzofC96NWpniNRWImw5agEv9jJz/exrhKNNEH3Qkq 1GVQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to; bh=LcnFLGNBmm0IVLGhfPKr1/VuZRnu6FpgzCF+UvqP0dg=; b=JQzSFx5BC9u8yUPDmf814EP9ps0Fq41b2fS1BLrvK3Xww4utvoGG2txRCaxm4yRyDx XOb/TwLuzUf7TUwQjN/IgNZRGuMaCYKc88EN1X9eT+VIMO83souc9N8HRqUfJxSdYjRa NGItdrCaJ3/zVBSWsMYULbxRHO26+k/v9KDIOeQaMifSqZJXnyWc9j+qym3QlCZZEq/K Pv+0rWewURrricWWbeSAtrh5f61BWfE/dDJgrXYRb56siTzeg1a6oC9ys8ZgFjJNgnzQ sNJThgbumdpKrjsYr/U8taerhh4PSH6LcX3HXgnPAjnfPm4IhGscYsyyw4C80DobprqI poag== X-Gm-Message-State: ANhLgQ2bvpvlEkXPsPZAY+ONPRlh6XIDof+GRoQsH9KZN3LwgTaTN5Mf W9BrU/yHLMNhnkSZeeaz4Zk= X-Google-Smtp-Source: ADFU+vvAbOxqcKt5RF7xOVnMxNSR4YmyrH64+IGiP1Bw17oAl7edlNDS7MO9MmbmG8Iwy66ff8TsXg== X-Received: by 2002:a17:90a:14f:: with SMTP id z15mr4888654pje.137.1585159019204; Wed, 25 Mar 2020 10:56:59 -0700 (PDT) Received: from ast-mbp ([2620:10d:c090:400::5:b339]) by smtp.gmail.com with ESMTPSA id g30sm630952pgn.40.2020.03.25.10.56.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Mar 2020 10:56:57 -0700 (PDT) Date: Wed, 25 Mar 2020 10:56:54 -0700 From: Alexei Starovoitov To: Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= Cc: John Fastabend , Andrii Nakryiko , Jakub Kicinski , Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , Andrii Nakryiko , "David S. Miller" , Jesper Dangaard Brouer , Lorenz Bauer , Andrey Ignatov , Networking , bpf Subject: Re: [PATCH bpf-next 1/4] xdp: Support specifying expected existing program when attaching XDP Message-ID: <20200325175654.i4cyhtauyogvzvgf@ast-mbp> References: <20200320103530.2853c573@kicinski-fedora-PC1C0HJN> <5e750bd4ebf8d_233f2ab4c81425c4ce@john-XPS-13-9370.notmuch> <87tv2f48lp.fsf@toke.dk> <87h7ye3mf3.fsf@toke.dk> <87tv2e10ly.fsf@toke.dk> <5e7a5e07d85e8_74a82ad21f7a65b88d@john-XPS-13-9370.notmuch> <87zhc4pw08.fsf@toke.dk> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <87zhc4pw08.fsf@toke.dk> Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On Wed, Mar 25, 2020 at 11:30:15AM +0100, Toke Høiland-Jørgensen wrote: > > From a BPF application developer PoV I can totally understand the desire > for unified APIs. But that unification can still be achieved at the > libbpf level, while keeping network interface configuration done through > netlink. it cannot be done at libbpf level. The kernel is missing the ownership concept. netlink vs other is irrelevant.