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 3E99BC433ED for ; Sat, 24 Apr 2021 23:29:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0F5DF613AF for ; Sat, 24 Apr 2021 23:29:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230179AbhDXX3n (ORCPT ); Sat, 24 Apr 2021 19:29:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229687AbhDXX3m (ORCPT ); Sat, 24 Apr 2021 19:29:42 -0400 Received: from mail-qk1-x732.google.com (mail-qk1-x732.google.com [IPv6:2607:f8b0:4864:20::732]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA730C061574 for ; Sat, 24 Apr 2021 16:29:03 -0700 (PDT) Received: by mail-qk1-x732.google.com with SMTP id d19so17511077qkk.12 for ; Sat, 24 Apr 2021 16:29:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=SvBBzZetwYnJPukMdSWf6+VLbaLbQBdVOS3YYmPmRAI=; b=MLvqsQhbPxsq+v8/y4VGBMIjClWYl1dIeJ8MHxcjHmAFg8k0PcKUj98utjlQ/kIxie 8MM7eb5AcQ088TF2TqSpfTYDsKTFd9Ud1vXx4ccUqg3pwHIifFthoBjqVqqI0heqNtaM T7f7Dc7OGGdd6NoYNx0sBA25cuyW+bI8bgbVk= 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=SvBBzZetwYnJPukMdSWf6+VLbaLbQBdVOS3YYmPmRAI=; b=abjK+kbg4157wjguEo985JB61vP2vBoFTlEIMSSTkeYClp0HTCSopwWGJ8LSFv422x RHgjFb7zy2lUiISI1po7JCwL0WgU12rxVj4bilcKa0LIFhyLG4ZFz/UZvOGORmU2Ozdo tGpZPfB6WeEM0fAjcpm2n6zYVzXSZRGx5ZaxonWD4t5zNAX1Mt5OYf6e5xsPgTfH4mm/ cMQIKgPLVcC4TqDSRYz2M50/wpKAvwEhF7AUzQA5q1ay/G44B7dOqQ2R/p3DPW9dwWk5 nCZe0QuTXVZ6Zj4EKmk3qS03N/AJSP/XAs2Bibc7BKF2VFALf1/04L0LMmKN6KQv7tc9 +hhQ== X-Gm-Message-State: AOAM5300l8iBkmOYiVVSkY/psusqw+Ie5vYa26UzAclLmorbnz8NYAJk iyY720jtJWJl8oS+EtZPX8KhljsAym3+Io16gFdvbUK2rJGlDw== X-Google-Smtp-Source: ABdhPJyi8SBPm9ybgbN6Oejc0SQN/RrSGYN8jsRDooeJeRcIl1UH+z3HljQxGH9fY4Z5G58dc9/ClB773iGy1r4lbxM= X-Received: by 2002:ae9:df46:: with SMTP id t67mr10760263qkf.269.1619306942642; Sat, 24 Apr 2021 16:29:02 -0700 (PDT) MIME-Version: 1.0 References: <1619295271-30853-1-git-send-email-michael.chan@broadcom.com> <1619295271-30853-11-git-send-email-michael.chan@broadcom.com> <20210424145205.1bfbdb06@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> In-Reply-To: <20210424145205.1bfbdb06@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> From: Michael Chan Date: Sat, 24 Apr 2021 16:28:51 -0700 Message-ID: Subject: Re: [PATCH net-next 10/10] bnxt_en: Implement .ndo_features_check(). To: Jakub Kicinski Cc: David Miller , Netdev , Andrew Gospodarek Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000001fb32705c0c0473f" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org --0000000000001fb32705c0c0473f Content-Type: text/plain; charset="UTF-8" On Sat, Apr 24, 2021 at 2:52 PM Jakub Kicinski wrote: > > On Sat, 24 Apr 2021 16:14:31 -0400 Michael Chan wrote: > > + features = vlan_features_check(skb, features); > > + if (!skb->encapsulation) > > + return features; > > + > > + switch (vlan_get_protocol(skb)) { > > + case htons(ETH_P_IP): > > + l4_proto = ip_hdr(skb)->protocol; > > + break; > > + case htons(ETH_P_IPV6): > > + l4_proto = ipv6_hdr(skb)->nexthdr; > > + break; > > + default: > > + return features; > > + } > > + > > + /* For UDP, we can only handle 1 Vxlan port and 1 Geneve port. */ > > + if (l4_proto == IPPROTO_UDP) { > > + struct bnxt *bp = netdev_priv(dev); > > + __be16 udp_port = udp_hdr(skb)->dest; > > + > > + if (udp_port != bp->vxlan_port && udp_port != bp->nge_port) > > + return features & ~(NETIF_F_CSUM_MASK | > > + NETIF_F_GSO_MASK); > > + } > > + return features; > > This is still written a little too much like a block list. > > What if, for example it's a UDP tunnel but with extension headers? > Is there any particular case that is served by not writing it as: > > if (l4_proto == UDP && (port == bp->vxl_port || > port == bp->nge_port)) > return features; > return features & ~(CSUM | GSO); > ? Sure, I can change it to check for port == instead of port != to make it more straight forward. --0000000000001fb32705c0c0473f Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQbQYJKoZIhvcNAQcCoIIQXjCCEFoCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3EMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE AxMKR2xvYmFsU2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yODA5MTYwMDAwMDBaMFsxCzAJBgNVBAYT AkJFMRkwFwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTEwLwYDVQQDEyhHbG9iYWxTaWduIEdDQyBS MyBQZXJzb25hbFNpZ24gMiBDQSAyMDIwMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA vbCmXCcsbZ/a0fRIQMBxp4gJnnyeneFYpEtNydrZZ+GeKSMdHiDgXD1UnRSIudKo+moQ6YlCOu4t rVWO/EiXfYnK7zeop26ry1RpKtogB7/O115zultAz64ydQYLe+a1e/czkALg3sgTcOOcFZTXk38e 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