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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6AA4C433EF for ; Tue, 12 Apr 2022 12:28:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349694AbiDLMaP (ORCPT ); Tue, 12 Apr 2022 08:30:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43088 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1354326AbiDLM23 (ORCPT ); Tue, 12 Apr 2022 08:28:29 -0400 Received: from mail-pl1-x635.google.com (mail-pl1-x635.google.com [IPv6:2607:f8b0:4864:20::635]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F162B1 for ; Tue, 12 Apr 2022 04:41:03 -0700 (PDT) Received: by mail-pl1-x635.google.com with SMTP id be5so10571646plb.13 for ; Tue, 12 Apr 2022 04:41:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :in-reply-to; bh=Kbbts5bCUtBKKQr1c0nCUtPIzhk6nh9/H8hNLr9at9g=; b=cDVkr5HqmTJnKne5g+wU+aqPfwU/JnCR1dPl10/Jvk70F0FErYNa3SgKAhJsjbypzp XLTp40FUajkgFR89m1B7Iy2LUSom+siRQsH7Oe4U5P8Tl+vhMHU25HVxWhOq7sSO8DqP Awi9MvDaqc0fW/iWQYiWq4yLM8+JyEqoyLJEE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:in-reply-to; bh=Kbbts5bCUtBKKQr1c0nCUtPIzhk6nh9/H8hNLr9at9g=; b=zLAEX4PYeBOmrlwBgQ/2/F2Of3C5WsZzW5MCFcH6YuNwWMEkPAu0C/Pgn04c3j02IX 45jMMd2r2b9C9XFDhDAIfe0gyJO8vkGEPZY5v6AOcaOCDff72s17GbARr3rjpmhXUhRI 16Uy8vxrRs0ee566uEYiNw/rcCaM3KCp9KcNf28zP7RrXz1Ap9BR+k6lQeUpwjJnaVU5 pj1alZxA0BBl+m985TKAUKFN72g7TrmnZf99In2nDfAjjiLJXSx0BDeEpTs5WlVJnqd/ pT3MOUkhVM8FV+BqVfGWuk4ymf6vVxhBaspY22SvG4Nmn2agvPltURLPmjSAdm1AYAr1 /a1A== X-Gm-Message-State: AOAM533kGYNqEPijj7ZoOKrQCjbJhYVvPvQW6K9qb8pZFYTo9U/yAvKg h1zmu0lWhU/zNPSlFuUsB4ZgNw== X-Google-Smtp-Source: ABdhPJwKFSc263HeMGfQwWBBkpjHj8Btigieo6QMOL3e95Z8hCtPYNIhNz4KzWKyvctG+J46vaqj8g== X-Received: by 2002:a17:902:6bc4:b0:154:6b3d:a720 with SMTP id m4-20020a1709026bc400b001546b3da720mr36542980plt.104.1649763662709; Tue, 12 Apr 2022 04:41:02 -0700 (PDT) Received: from noodle ([192.19.250.250]) by smtp.gmail.com with ESMTPSA id l25-20020a635719000000b0039da6cdf82dsm485164pgb.83.2022.04.12.04.40.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Apr 2022 04:41:02 -0700 (PDT) Date: Tue, 12 Apr 2022 14:40:49 +0300 From: Boris Sukholitko To: Jiri Pirko Cc: netdev@vger.kernel.org, "David S . Miller" , Jakub Kicinski , Jamal Hadi Salim , Cong Wang , "Gustavo A . R . Silva" , Vladimir Oltean , Eric Dumazet , zhang kai , Yoshiki Komachi , Ilya Lifshits Subject: Re: [PATCH net-next v2 5/5] net/sched: flower: Consider the number of tags for vlan filters Message-ID: <20220412114049.GA2451@noodle> References: <20220412100236.27244-1-boris.sukholitko@broadcom.com> <20220412100236.27244-6-boris.sukholitko@broadcom.com> MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000018857f05dc73894e" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org --00000000000018857f05dc73894e Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Apr 12, 2022 at 01:09:35PM +0200, Jiri Pirko wrote: > Tue, Apr 12, 2022 at 12:02:36PM CEST, boris.sukholitko@broadcom.com wrote: > >Currently the existence of vlan filters is conditional on the vlan > >protocol being matched in the tc rule. I.e. the following rule: > > > >tc filter add dev eth1 ingress flower vlan_prio 5 > > > >is illegal because we lack protocol 802.1q in the rule. > > > >Having the num_of_vlans filter configured removes this restriction. The > >following rule becomes ok: > > > >tc filter add dev eth1 ingress flower num_of_vlans 1 vlan_prio 5 > > > >because we know that the packet is single tagged. > > > >We achieve the above by having is_vlan_key helper look at the number of > > Sorry to be a nitpicker, but who's "we"? When I read the patch > description, I need to understand clearly what the patch is doing, which > is not this case. You suppose to command the codebase what to do. > I fail to see that :/ > > What do you think of the following description? The description consists of two parts: the first provides motivation for the patch, the second is the way the motivation is implemented. I've judiciously edited out the "we"-word. :) Currently the existence of vlan filters is conditional on the vlan protocol being matched in the tc rule. I.e. the following rule: tc filter add dev eth1 ingress flower vlan_prio 5 is illegal because vlan protocol (e.g. 802.1q) does not appear in the rule. Having the num_of_vlans filter configured removes this restriction. The following rule becomes ok: tc filter add dev eth1 ingress flower num_of_vlans 1 vlan_prio 5 because having num_of_vlans==1 implies that the packet is single tagged. To make the above possible, is_vlan_key helper is changed to look at the number of vlans in addition to the vlan ethertype. Outer tag vlan filters (e.g. vlan_prio) require the number of vlan tags be greater than 0. Inner filters (e.g. cvlan_prio) require the number of vlan tags be greater than 1. Number of vlans filter may cause ethertype to be set to 0. fl_set_key_vlan is changed to accomodate this. Thanks, Boris. > >vlans in addition to the vlan ethertype. Outer tag vlan filters (e.g. > >vlan_prio) require the number of vlan tags be greater than 0. Inner > >filters (e.g. cvlan_prio) require the number of vlan tags be greater > >than 1. > > > >Number of vlans filter may cause ethertype to be set to 0. Check this in > >fl_set_key_vlan. > > --00000000000018857f05dc73894e Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQeQYJKoZIhvcNAQcCoIIQajCCEGYCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3QMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE AxMKR2xvYmFsU2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yODA5MTYwMDAwMDBaMFsxCzAJBgNVBAYT AkJFMRkwFwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTEwLwYDVQQDEyhHbG9iYWxTaWduIEdDQyBS MyBQZXJzb25hbFNpZ24gMiBDQSAyMDIwMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA vbCmXCcsbZ/a0fRIQMBxp4gJnnyeneFYpEtNydrZZ+GeKSMdHiDgXD1UnRSIudKo+moQ6YlCOu4t rVWO/EiXfYnK7zeop26ry1RpKtogB7/O115zultAz64ydQYLe+a1e/czkALg3sgTcOOcFZTXk38e aqsXsipoX1vsNurqPtnC27TWsA7pk4uKXscFjkeUE8JZu9BDKaswZygxBOPBQBwrA5+20Wxlk6k1 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