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=-2.1 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, USER_AGENT_SANE_1 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 0145DC35249 for ; Sun, 2 Feb 2020 17:48:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C188D2067C for ; Sun, 2 Feb 2020 17:48:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="hfgaD7f+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726916AbgBBRsx (ORCPT ); Sun, 2 Feb 2020 12:48:53 -0500 Received: from mail-io1-f68.google.com ([209.85.166.68]:45495 "EHLO mail-io1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726893AbgBBRsx (ORCPT ); Sun, 2 Feb 2020 12:48:53 -0500 Received: by mail-io1-f68.google.com with SMTP id i11so14057114ioi.12 for ; Sun, 02 Feb 2020 09:48:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=s2EI1ApfBfKbij97H0qgSeC6DTQ7nOZfOCFqPsWL974=; b=hfgaD7f+9WY5q6YG7vJKwugnA70v7Bb1/FY10UW+Py26zz0eDHuEPV9cJOaJX29KEE Rcls/EtZ/JoSjOzkewg9zlpTvAgAMJyxwe/wJMs+whDd9lbnwhPPUdoJQRtm5gIHbnZI eBQKRAu/nMNjPrU+bDp8JWFp41zS8gZH9GclF5rpdL5rK2NM0TBMYpZme/fWD6j7rjX3 X08XG+sPiaumowda8PpiU5Q2PZk8hilgPVzGnS1Z5ikaFa/Ya1WZrSAQiXGiJMhf1bDY F2WJcCVlWpyWUOXATUz1ujFjVM24Lrbz1efxsPmEln5vdBqytBQfxDySRio8dVKQKw8a iHzQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=s2EI1ApfBfKbij97H0qgSeC6DTQ7nOZfOCFqPsWL974=; b=fFVOt17+QRnoyTuFBBPkBQfwKExUUkdlUSoF2BnAOZ77FuU4eZQ/erGhH1EDk4qasL JcAfhJLFwMJcB+0ZRDI1gyh/01/GSBWxf1wCuOm/3Zipf0g+DFi3Cv01qUURB/DV8j1n eBldJQdnr+j4XgeVjbmsZqUdljdGtLdSjgnl7QlrCJO49tWL7Q2mRfA3CjbaXAUH7rHd ziffILBtKoKhDOLpAfPSTtHyB4ubj9IOZM78JaQNLFuS1G7fEreE8uBx+iJ6utClEQQo Dz5KfPeU8AiKWwvlDw2ZdgwfRXxXFXMwWUBTrAw7CWDkiO+S7IjfnI/fNGID5mjWiOP9 2U5g== X-Gm-Message-State: APjAAAWQNjS5HKd6UWqWgIcAkE44czptcJP8FKcmOZZEYLpsTsfhAOgq zd/EoY7v1sKneBO81+rgREy+foCL X-Google-Smtp-Source: APXvYqygydksMUumG6bcGcmhZxKeW6+j4IgpYCAOkpcQgxPylrDjcn4+bSMvDrxHWHJSkeIi3SJ/og== X-Received: by 2002:a05:6602:2188:: with SMTP id b8mr15470199iob.248.1580665732823; Sun, 02 Feb 2020 09:48:52 -0800 (PST) Received: from ?IPv6:2601:282:803:7700:2529:5ed3:9969:3b0e? ([2601:282:803:7700:2529:5ed3:9969:3b0e]) by smtp.googlemail.com with ESMTPSA id z21sm4675690ioj.21.2020.02.02.09.48.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 02 Feb 2020 09:48:52 -0800 (PST) Subject: Re: [PATCH bpf-next 03/12] net: Add IFLA_XDP_EGRESS for XDP programs in the egress path To: =?UTF-8?Q?Toke_H=c3=b8iland-J=c3=b8rgensen?= , Jakub Kicinski , Jesper Dangaard Brouer Cc: David Ahern , netdev@vger.kernel.org, prashantbhole.linux@gmail.com, jasowang@redhat.com, davem@davemloft.net, mst@redhat.com, toshiaki.makita1@gmail.com, daniel@iogearbox.net, john.fastabend@gmail.com, ast@kernel.org, kafai@fb.com, songliubraving@fb.com, yhs@fb.com, andriin@fb.com, David Ahern References: <20200123014210.38412-1-dsahern@kernel.org> <20200123014210.38412-4-dsahern@kernel.org> <87tv4m9zio.fsf@toke.dk> <335b624a-655a-c0c6-ca27-102e6dac790b@gmail.com> <20200124072128.4fcb4bd1@cakuba> <87o8usg92d.fsf@toke.dk> <1d84d8be-6812-d63a-97ca-ebc68cc266b9@gmail.com> <20200126134933.2514b2ab@carbon> <20200126141701.3f27b03c@cakuba> <20200128151343.28c1537d@carbon> <20200130064517.43f2064f@cakuba> <87lfpme1mg.fsf@toke.dk> From: David Ahern Message-ID: <0666c3d2-af39-d44b-2def-c8569634deba@gmail.com> Date: Sun, 2 Feb 2020 10:48:50 -0700 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.4.2 MIME-Version: 1.0 In-Reply-To: <87lfpme1mg.fsf@toke.dk> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 2/1/20 9:03 AM, Toke Høiland-Jørgensen wrote: > I think it would be weird and surprising if it *doesn't* see packets > from the stack. On RX, XDP sees everything; the natural expectation > would be that this was also the case on TX, no? > Yes. XDP_EGRESS should be symmetrical with XDP on the Rx side.