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 E89B5C433F5 for ; Mon, 11 Apr 2022 14:57:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235240AbiDKO7P (ORCPT ); Mon, 11 Apr 2022 10:59:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40224 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229604AbiDKO7O (ORCPT ); Mon, 11 Apr 2022 10:59:14 -0400 Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E317717AB6 for ; Mon, 11 Apr 2022 07:56:59 -0700 (PDT) Received: by mail-pl1-x62c.google.com with SMTP id be5so8098041plb.13 for ; Mon, 11 Apr 2022 07:56:59 -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=rpVWTE3/0wxg7mrk4bQZPwGiu2n6Hhtow1iZx6VVQY4=; b=N3rUMgJLJYe2y8bZ8d9afXFISZ/914Jy6E7lfZ48ZH2cSo97NhWl+fSlUoCmD3UZsc hTULsZb+u8ThDdAza8lbGp7uiAOV9spTcSLdcOiXQDyCn0vwE72561j0qrBCgJlImHtA xbdbEszkOpSZ3ZP+DoPNzjNnVEG1ymWqh47Vk= 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=rpVWTE3/0wxg7mrk4bQZPwGiu2n6Hhtow1iZx6VVQY4=; b=Fm1MXdL8CETZQdjZehddiKqzcBSKMZJC8i4tjfx26zdevMhunGIegwIX/DteVKV8Yr o8zsVBVHJQmToONdyJZFiFq6nRTe1e3CHuL5zhLQOO+QREu8tN/QFB0X+yD43EioTiAZ ypo/hj9ONjjSbVLdfbsac4BJZ5dZtD4AND9j7sGf+nQ6E8ANJfw3ewF7qGggyUG3FCKh WAbbaExqj7cBr8SHplzbaMD2mDeuRUrcaCS5juiwGMHb3Qa/suF8o3JBUUkg2Mq0DoJX JQ3LxgqIuYL33FMrctWzrMKm4CKC27x+Vvc6SWMwHIV6Hnk7Cje7ot+q9IBLbRtmHFdO Mjkg== X-Gm-Message-State: AOAM532WBL/cl9+BCPa1p8wgrG8mRIlONC+93sU2U1Y6Z2uH6TKsF9AP z/QGZvLyeP9hDE/gb4q/vr7aZw== X-Google-Smtp-Source: ABdhPJy8vI+MV8BjPnu29NWMVwFTJCjYW26ekBPOsTXCdZbmgEPaddFfryvMB1mcmlEFi1gD7lJABQ== X-Received: by 2002:a17:903:22c6:b0:154:4156:f397 with SMTP id y6-20020a17090322c600b001544156f397mr32681461plg.29.1649689019110; Mon, 11 Apr 2022 07:56:59 -0700 (PDT) Received: from noodle ([192.19.250.250]) by smtp.gmail.com with ESMTPSA id k23-20020a17090a591700b001ca00b46cf9sm20630431pji.18.2022.04.11.07.56.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Apr 2022 07:56:58 -0700 (PDT) Date: Mon, 11 Apr 2022 17:56:47 +0300 From: Boris Sukholitko To: Jamal Hadi Salim Cc: netdev@vger.kernel.org, "David S . Miller" , Jakub Kicinski , Cong Wang , Jiri Pirko , "Gustavo A . R . Silva" , Vladimir Oltean , Eric Dumazet , zhang kai , Yoshiki Komachi , Ilya Lifshits Subject: Re: [PATCH net-next 0/5] flower: match on the number of vlan tags Message-ID: <20220411145647.GA23636@noodle> References: <20220411133100.18126-1-boris.sukholitko@broadcom.com> <1b1b82a9-3e1b-d20a-f62c-f35fe1f155b8@mojatatu.com> MIME-Version: 1.0 In-Reply-To: <1b1b82a9-3e1b-d20a-f62c-f35fe1f155b8@mojatatu.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000001a3e005dc62280a" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org --00000000000001a3e005dc62280a Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, Apr 11, 2022 at 10:07:14AM -0400, Jamal Hadi Salim wrote: > On 2022-04-11 09:30, Boris Sukholitko wrote: > > Hi, > > > > Our customers in the fiber telecom world have network configurations > > where they would like to control their traffic according to the number > > of tags appearing in the packet. > > > > For example, TR247 GPON conformance test suite specification mostly > > talks about untagged, single, double tagged packets and gives lax > > guidelines on the vlan protocol vs. number of vlan tags. > > > > This is different from the common IT networks where 802.1Q and 802.1ad > > protocols are usually describe single and double tagged packet. GPON > > configurations that we work with have arbitrary mix the above protocols > > and number of vlan tags in the packet. > > > > The following patch series implement number of vlans flower filter. They > > add num_of_vlans flower filter as an alternative to vlan ethtype protocol > > matching. The end result is that the following command becomes possible: > > > > tc filter add dev eth1 ingress flower \ > > num_of_vlans 1 vlan_prio 5 action drop > > > > The idea looks sane. I guess flow dissector is now not just involving > headers but metadata as well. I can see this applied to MPLS for example, > etc. > Can you please provide more elaborate example of more than 1 vlan? Perusing our logs, we have redirect rules such as: tc filter add dev $GPON ingress flower num_of_vlans $N \ action mirred egress redirect dev $DEV where N can range from 0 to 3 and $DEV is the function of $N. Also there are rules setting skb mark based on the number of vlans: tc filter add dev $GPON ingress flower num_of_vlans $N vlan_prio \ $P action skbedit mark $M > Where would the line be drawn: > Is it max of two vlans? We have seen the maximum of 3 vlans. > Is there potential of <=X, meaning matching of upto X Vlans? > We've managed to get by without such feature somehow :) Thanks, Boris. > cheers, > jamal --00000000000001a3e005dc62280a 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 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