From patchwork Sat Sep 26 00:56:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jakub Kicinski X-Patchwork-Id: 1371682 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=kernel.org Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=default header.b=aXOyojSB; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Byr3G3mTdz9sRf for ; Sat, 26 Sep 2020 10:57:14 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729900AbgIZA5N (ORCPT ); Fri, 25 Sep 2020 20:57:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:47346 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729868AbgIZA5C (ORCPT ); Fri, 25 Sep 2020 20:57:02 -0400 Received: from kicinski-fedora-PC1C0HJN.thefacebook.com (unknown [163.114.132.6]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A50CC23119; Sat, 26 Sep 2020 00:56:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601081819; bh=uHQBQDw5EqZsbpLq2td11X0FSaVovfEOMhVFJwjuaQo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aXOyojSBaPcYIU02ZuWO3bZsnJOfzAxOPZLXmXIJ2LDYaHKb28YGPuc17RfTFENZZ 0Rd44YBjzcDtPeXvNf1V/iAVHRg12tBM0d0CDvMYAuzOOwlmTk/kdh/fR0Yjg0mPnb yB1EaBrAoVrhJ7CYsWCQmaXfUE0mfgIU79ldq3vA= From: Jakub Kicinski To: davem@davemloft.net Cc: netdev@vger.kernel.org, anthony.l.nguyen@intel.com, Jakub Kicinski Subject: [PATCH net-next v2 10/10] docs: vxlan: add info about device features Date: Fri, 25 Sep 2020 17:56:49 -0700 Message-Id: <20200926005649.3285089-11-kuba@kernel.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200926005649.3285089-1-kuba@kernel.org> References: <20200926005649.3285089-1-kuba@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Add some information about VxLAN-related netdev features and how to dump port table via ethtool. Signed-off-by: Jakub Kicinski --- Documentation/networking/vxlan.rst | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/Documentation/networking/vxlan.rst b/Documentation/networking/vxlan.rst index ce239fa01848..2759dc1cc525 100644 --- a/Documentation/networking/vxlan.rst +++ b/Documentation/networking/vxlan.rst @@ -58,3 +58,31 @@ forwarding table using the new bridge command. 3. Show forwarding table:: # bridge fdb show dev vxlan0 + +The following NIC features may indicate support for UDP tunnel-related +offloads (most commonly VXLAN features, but support for a particular +encapsulation protocol is NIC specific): + + - `tx-udp_tnl-segmentation` + - `tx-udp_tnl-csum-segmentation` + ability to perform TCP segmentation offload of UDP encapsulated frames + + - `rx-udp_tunnel-port-offload` + receive side parsing of UDP encapsulated frames which allows NICs to + perform protocol-aware offloads, like checksum validation offload of + inner frames (only needed by NICs without protocol-agnostic offloads) + +For devices supporting `rx-udp_tunnel-port-offload` the list of currently +offloaded ports can be interrogated with `ethtool`:: + + $ ethtool --show-tunnels eth0 + Tunnel information for eth0: + UDP port table 0: + Size: 4 + Types: vxlan + No entries + UDP port table 1: + Size: 4 + Types: geneve, vxlan-gpe + Entries (1): + port 1230, vxlan-gpe