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=-5.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 877FBC433E0 for ; Mon, 1 Mar 2021 14:42:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4632364DF1 for ; Mon, 1 Mar 2021 14:42:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236119AbhCAOmS (ORCPT ); Mon, 1 Mar 2021 09:42:18 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:58362 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234639AbhCAOmR (ORCPT ); Mon, 1 Mar 2021 09:42:17 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614609651; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=no/KojznK2Kk5EA2hOkhIhJE/pS1Wm+xOY/Q6SZqTgw=; b=ftno1xmxogr4v2zRanJucQQM48jdw4x0+OARSdPNNIQaAFiyH+6Si4tvcepm0ZY7N6L1eM DLFvaBjDiy3UzC7/JCRP05lq1L+S/N71IiN76J4WE+RAETlF5Rw6XkeJKZdVxSayh4w5bz ORdUtfpQSycVfkgYds8XMQ9lfBCVqyg= Received: from mail-ed1-f69.google.com (mail-ed1-f69.google.com [209.85.208.69]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-341-UD4LgFgMN6qBxhOgFIXoBw-1; Mon, 01 Mar 2021 09:40:47 -0500 X-MC-Unique: UD4LgFgMN6qBxhOgFIXoBw-1 Received: by mail-ed1-f69.google.com with SMTP id a2so802328edx.0 for ; Mon, 01 Mar 2021 06:40:47 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:in-reply-to:references:date :message-id:mime-version; bh=no/KojznK2Kk5EA2hOkhIhJE/pS1Wm+xOY/Q6SZqTgw=; b=Zr2utDl6SRg/EhSIfU6O5KgKqcxJ/74cgod8PR6qjBHhmMHTQ+virl/tsr1M1EOWdQ YD+3gzeYDm6xoZ879N5AJESzB1VRXZNtn6ePlFH9EN+HAZ9anRJwy/Wz7ln0U/Ozqcgy dv01Egyh8BUQF4pKoR5XNuUv3+t2bcF9oOqobSA4HZJeHtg3bdEWCueRd4n3EderFG/0 37aqvfXwoTGJICl2OOeGkolts6vMxNa0eUXugPFZKSTRjBIULLw5VPOJIpKU/oclRpNY EXnYoCXXe3CRshTH0b52+OjO7jn3TCrU2a22HM/j1+XxhTyqK9eGgVIB7/MP7yC7TksL 5XBg== X-Gm-Message-State: AOAM533NMZbrixUo9a1E7c4ZX/0meJXD/zKNwp9BYGUV2Qn6pKYt3DxT Oa1ktga++CgrAdJvrrWCCYj63bBNYOAjf5q+kCKH7ryZ8buJtsOijGclpnPYSFuArnEHjpAv6Gu Emrhxlr+wMLFWbxFhYsT4v5E= X-Received: by 2002:a17:906:8614:: with SMTP id o20mr15716343ejx.386.1614609646030; Mon, 01 Mar 2021 06:40:46 -0800 (PST) X-Google-Smtp-Source: ABdhPJy/v4DUfmo2EG/X1I9dp40zuUNEK4R8FDgR1BlS2OD+WDNerm67ichjQAYLB8z+2p/ObsCeMA== X-Received: by 2002:a17:906:8614:: with SMTP id o20mr15716323ejx.386.1614609645778; Mon, 01 Mar 2021 06:40:45 -0800 (PST) Received: from alrua-x1.borgediget.toke.dk ([2a0c:4d80:42:443::2]) by smtp.gmail.com with ESMTPSA id e8sm11135568edq.77.2021.03.01.06.40.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Mar 2021 06:40:45 -0800 (PST) Received: by alrua-x1.borgediget.toke.dk (Postfix, from userid 1000) id BE0951800F1; Mon, 1 Mar 2021 15:40:44 +0100 (CET) From: Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= To: Shwetha Vittal , xdp-newbies@vger.kernel.org Subject: Re: Query on eBPF Map iterator in Kernel space In-Reply-To: References: X-Clacks-Overhead: GNU Terry Pratchett Date: Mon, 01 Mar 2021 15:40:44 +0100 Message-ID: <87pn0jvswj.fsf@toke.dk> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: xdp-newbies@vger.kernel.org Shwetha Vittal writes: > Hi, > > Is there any way to iterate through eBPF Map elements in kernel space. > I know that there is one at user space bpf_map_get_next_key(). But it > doesn't work when tried in kernel space. I have a requirement to find > the record in the eBPF map which has the least value in kernel space > and pick it for further packet processing and therefore need to > iterate through eBF Map . There will be soon: https://lore.kernel.org/bpf/20210226204920.3884074-1-yhs@fb.com/ -Toke