From patchwork Sat Aug 24 02:42:47 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marek_Beh=C3=BAn?= X-Patchwork-Id: 1152557 Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=nic.cz Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; secure) header.d=nic.cz header.i=@nic.cz header.b="Bsh0Tdo6"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46FjHY05Lqz9s3Z for ; Sat, 24 Aug 2019 12:43:04 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726142AbfHXCnB (ORCPT ); Fri, 23 Aug 2019 22:43:01 -0400 Received: from mail.nic.cz ([217.31.204.67]:37266 "EHLO mail.nic.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725283AbfHXCnB (ORCPT ); Fri, 23 Aug 2019 22:43:01 -0400 Received: from dellmb.labs.office.nic.cz (unknown [IPv6:2001:1488:fffe:6:cac7:3539:7f1f:463]) by mail.nic.cz (Postfix) with ESMTP id 7341D140D0D; Sat, 24 Aug 2019 04:42:59 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1566614579; bh=8cktA2t0gNbPrKbO1811mv89l+iDHa3zL9IZwEnwwBk=; h=From:To:Date; b=Bsh0Tdo6R5I8s8LwX+KI8nC8GqOH1UsoBc0/QaGFa+BAAQR2hzbWeJE6TlxWcPAhZ R2R4F85FEaifcOVb9LFLhB16Qg0vuh8AZ9PHPGerLhOJmFNfcxzPsN4F4zW0my9gkz CaStjeGpF47Pw0HzouzZOcb/2In2/ICU0+IOSer0= From: =?utf-8?q?Marek_Beh=C3=BAn?= To: netdev@vger.kernel.org Cc: Andrew Lunn , Vivien Didelot , Florian Fainelli , David Ahern , Stephen Hemminger , =?utf-8?q?Marek_Beh=C3=BAn?= Subject: [PATCH RFC net-next 0/3] Multi-CPU DSA support Date: Sat, 24 Aug 2019 04:42:47 +0200 Message-Id: <20190824024251.4542-1-marek.behun@nic.cz> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.100.3 at mail.nic.cz X-Virus-Status: Clean X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT shortcircuit=ham autolearn=disabled version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on mail.nic.cz Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hi, this is my attempt to solve the multi-CPU port issue for DSA. Patch 1 adds code for handling multiple CPU ports in a DSA switch tree. If more than one CPU port is found in a tree, the code assigns CPU ports to user/DSA ports in a round robin way. So for the simplest case where we have one switch with N ports, 2 of them of type CPU connected to eth0 and eth1, and the other ports labels being lan1, lan2, ..., the code assigns them to CPU ports this way: lan1 <-> eth0 lan2 <-> eth1 lan3 <-> eth0 lan4 <-> eth1 lan5 <-> eth0 ... Patch 2 adds a new operation to the net device operations structure. Currently we use the iflink property of a net device to report to which CPU port a given switch port si connected to. The ip link utility from iproute2 reports this as "lan1@eth0". We add a new net device operation, ndo_set_iflink, which can be used to set this property. We call this function from the netlink handlers. Patch 3 implements this new ndo_set_iflink operation for DSA slave device. Thus the userspace can request a change of CPU port of a given port. I am also sending patch for iproute2-next, to add support for setting this iflink value. Marek Marek Behún (3): net: dsa: allow for multiple CPU ports net: add ndo for setting the iflink property net: dsa: implement ndo_set_netlink for chaning port's CPU port include/linux/netdevice.h | 5 +++ include/net/dsa.h | 11 ++++- net/core/dev.c | 15 +++++++ net/core/rtnetlink.c | 7 ++++ net/dsa/dsa2.c | 84 +++++++++++++++++++++++++-------------- net/dsa/slave.c | 35 ++++++++++++++++ 6 files changed, 126 insertions(+), 31 deletions(-)