From patchwork Thu May 13 13:20:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Linus_L=C3=BCssing?= X-Patchwork-Id: 437704 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=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED autolearn=ham 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 99D7EC433ED for ; Thu, 13 May 2021 13:21:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 72A3761435 for ; Thu, 13 May 2021 13:21:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234112AbhEMNW4 (ORCPT ); Thu, 13 May 2021 09:22:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56280 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233994AbhEMNW2 (ORCPT ); Thu, 13 May 2021 09:22:28 -0400 Received: from mail.aperture-lab.de (mail.aperture-lab.de [IPv6:2a01:4f8:c2c:665b::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 34F8FC061574; Thu, 13 May 2021 06:21:04 -0700 (PDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 2EAF341008; Thu, 13 May 2021 15:21:01 +0200 (CEST) From: =?utf-8?q?Linus_L=C3=BCssing?= To: netdev@vger.kernel.org Cc: Roopa Prabhu , Nikolay Aleksandrov , Jakub Kicinski , "David S . Miller" , bridge@lists.linux-foundation.org, linux-kernel@vger.kernel.org, =?utf-8?q?Linus_L=C3=BCssing?= Subject: [net-next v4 03/11] net: bridge: mcast: prepare mdb netlink for mcast router split Date: Thu, 13 May 2021 15:20:45 +0200 Message-Id: <20210513132053.23445-4-linus.luessing@c0d3.blue> In-Reply-To: <20210513132053.23445-1-linus.luessing@c0d3.blue> References: <20210513132053.23445-1-linus.luessing@c0d3.blue> MIME-Version: 1.0 X-Last-TLS-Session-Version: TLSv1.2 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org In preparation for the upcoming split of multicast router state into their IPv4 and IPv6 variants and to avoid IPv6 #ifdef clutter later add some inline functions for the protocol specific parts in the mdb router netlink code. Also the we need iterate over the port instead of router list to be able put one router port entry with both the IPv4 and IPv6 multicast router info later. Signed-off-by: Linus Lüssing --- net/bridge/br_mdb.c | 39 ++++++++++++++++++++++++++++++++++----- 1 file changed, 34 insertions(+), 5 deletions(-) diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c index d61def8..482edb9 100644 --- a/net/bridge/br_mdb.c +++ b/net/bridge/br_mdb.c @@ -16,29 +16,58 @@ #include "br_private.h" +static bool br_rports_have_mc_router(struct net_bridge *br) +{ + return !hlist_empty(&br->ip4_mc_router_list); +} + +static bool +br_ip4_rports_get_timer(struct net_bridge_port *port, unsigned long *timer) +{ + *timer = br_timer_value(&port->ip4_mc_router_timer); + return !hlist_unhashed(&port->ip4_rlist); +} + +static bool +br_ip6_rports_get_timer(struct net_bridge_port *port, unsigned long *timer) +{ + *timer = 0; + return false; +} + static int br_rports_fill_info(struct sk_buff *skb, struct netlink_callback *cb, struct net_device *dev) { struct net_bridge *br = netdev_priv(dev); - struct net_bridge_port *p; + bool have_ip4_mc_rtr, have_ip6_mc_rtr; + unsigned long ip4_timer, ip6_timer; struct nlattr *nest, *port_nest; + struct net_bridge_port *p; - if (!br->multicast_router || hlist_empty(&br->ip4_mc_router_list)) + if (!br->multicast_router) + return 0; + + if (!br_rports_have_mc_router(br)) return 0; nest = nla_nest_start_noflag(skb, MDBA_ROUTER); if (nest == NULL) return -EMSGSIZE; - hlist_for_each_entry_rcu(p, &br->ip4_mc_router_list, ip4_rlist) { - if (!p) + list_for_each_entry_rcu(p, &br->port_list, list) { + have_ip4_mc_rtr = br_ip4_rports_get_timer(p, &ip4_timer); + have_ip6_mc_rtr = br_ip6_rports_get_timer(p, &ip6_timer); + + if (!have_ip4_mc_rtr && !have_ip6_mc_rtr) continue; + port_nest = nla_nest_start_noflag(skb, MDBA_ROUTER_PORT); if (!port_nest) goto fail; + if (nla_put_nohdr(skb, sizeof(u32), &p->dev->ifindex) || nla_put_u32(skb, MDBA_ROUTER_PATTR_TIMER, - br_timer_value(&p->ip4_mc_router_timer)) || + max(ip4_timer, ip6_timer)) || nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE, p->multicast_router)) { nla_nest_cancel(skb, port_nest);