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=-1.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 3E06CC169C4 for ; Mon, 11 Feb 2019 06:33:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 056DF2070C for ; Mon, 11 Feb 2019 06:33:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=6wind-com.20150623.gappssmtp.com header.i=@6wind-com.20150623.gappssmtp.com header.b="OCt2lueH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726140AbfBKGdq (ORCPT ); Mon, 11 Feb 2019 01:33:46 -0500 Received: from mail-qt1-f195.google.com ([209.85.160.195]:43647 "EHLO mail-qt1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725931AbfBKGdp (ORCPT ); Mon, 11 Feb 2019 01:33:45 -0500 Received: by mail-qt1-f195.google.com with SMTP id y4so10934608qtc.10 for ; Sun, 10 Feb 2019 22:33:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=6wind-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=zw6A3+3ejI8jHpuOtuzeGpDhMLwY6p25ktKF1JurO+E=; b=OCt2lueHKHFfNCeJsYKkMdPQcnt+w2optyuPnMj3o2m+I1/WSOKdGHeixgJwJv3JMe iJkAcnjitWu8e0NfYVTtxIH1ytcR+Iv7jWUg7IZaDTTNCgriIBgZV+Na0Ch1mXyui+cs /bxebNWOD23xFLd895SGw0CJAG5Kdr2Vb4fRk9cTEOij5YjpbVqSrjXf2hRZwWil+kq4 przl6tR+avxeOF5b93KwxJNWXQxxaXReRP9NZHCcGeXIdbVv2Fzb9Ws8EjayUU/0PlWs aG4BrZP2xV34Flqczlc3IGDwbA6uHxA2/LUTQXjNaARpfDIGfoQ3ZBRYWQAwpFTKtH4J ezlQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=zw6A3+3ejI8jHpuOtuzeGpDhMLwY6p25ktKF1JurO+E=; b=cmD145LOiz8Vq45najOJ1vcZVebSMnamn06W9yNL8MvIGGJTVZrWZlBL/5QSkslHoQ IUdqOnsgdnSqTTLBXZWMlHh7g6YhMji5D7shbTvEs3hM57o/yJOo+1XNUTSLqUQbKukj 4Le5gES2DwfbmPTGjK90100DwD1lOxLpEOjT1D1aJrTW92R2nVJ/0XKs7KH7S0O5o+4T 2JvJEmpoQ9Zxq+US1YXgmrUMO9QZApWbWoM1qzHUqpRRc3c+2n1O+KbhdsUIeXMYjL13 KTcTsrYEI/5/FcJnpqqEnxiwFZ8AwLrkOgvcXqBqkGZCe/SiAUvEg1t8Xz/DRGqXhz+B 3IUQ== X-Gm-Message-State: AHQUAubvX1Zmjtvx0Cza+EAicx+vWLG35MiGY6z6l45oFWAgFG7fm9U6 JR89L5xYQ8c6UJSCpAjc7mHmV+0Z/vUpuNKXRIrNcQ== X-Google-Smtp-Source: AHgI3IbEvLkOYJ0dhNrl7mEHaXYF42tP4V9o18qMZ/Jgxk3IgIrXy2vEgi0DwLMJAheGQTomnPHSJ9QFdR0pINKfsGM= X-Received: by 2002:a0c:fb10:: with SMTP id c16mr6021147qvp.187.1549866825041; Sun, 10 Feb 2019 22:33:45 -0800 (PST) MIME-Version: 1.0 References: <1549631126-29067-1-git-send-email-magnus.karlsson@intel.com> In-Reply-To: <1549631126-29067-1-git-send-email-magnus.karlsson@intel.com> From: Jean-Mickael Guerin Date: Mon, 11 Feb 2019 07:33:33 +0100 Message-ID: Subject: Re: [PATCH bpf-next v4 0/2] libbpf: adding AF_XDP support To: Magnus Karlsson Cc: bjorn.topel@intel.com, ast@kernel.org, daniel@iogearbox.net, netdev@vger.kernel.org, jakub.kicinski@netronome.com, bjorn.topel@gmail.com, qi.z.zhang@intel.com, brouer@redhat.com, xiaolong.ye@intel.com Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hi Magnus, > * In a future release, I am planning on adding a higher level data > plane interface too. This will be based around recvmsg and sendmsg > with the use of struct iovec for batching, without the user having > to know anything about the underlying four rings of an AF_XDP > socket. There will be one semantic difference though from the > standard recvmsg and that is that the kernel will fill in the iovecs > instead of the application. But the rest should be the same as the > libc versions so that application writers feel at home. You might consider recvmmsg() and sendmmsg() (bulk of multi segments packets?) Jean-Mickael