From patchwork Sun May 9 19:45:00 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: 432954 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 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 780BEC433ED for ; Sun, 9 May 2021 19:45:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 44346613AB for ; Sun, 9 May 2021 19:45:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229948AbhEITq3 (ORCPT ); Sun, 9 May 2021 15:46:29 -0400 Received: from mail.aperture-lab.de ([116.203.183.178]:55828 "EHLO mail.aperture-lab.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229683AbhEITq2 (ORCPT ); Sun, 9 May 2021 15:46:28 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 39DBC3EDDD; Sun, 9 May 2021 21:45:23 +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, b.a.t.m.a.n@lists.open-mesh.org, linux-kernel@vger.kernel.org, =?utf-8?q?Linus_L=C3=BCssing?= Subject: [net-next v2 02/11] net: bridge: mcast: add wrappers for router node retrieval Date: Sun, 9 May 2021 21:45:00 +0200 Message-Id: <20210509194509.10849-3-linus.luessing@c0d3.blue> In-Reply-To: <20210509194509.10849-1-linus.luessing@c0d3.blue> References: <20210509194509.10849-1-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 two wrapper functions for router node retrieval in the payload forwarding code. Signed-off-by: Linus Lüssing --- net/bridge/br_forward.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c index 3b67184..b5ec4f9 100644 --- a/net/bridge/br_forward.c +++ b/net/bridge/br_forward.c @@ -264,6 +264,16 @@ static void maybe_deliver_addr(struct net_bridge_port *p, struct sk_buff *skb, __br_forward(p, skb, local_orig); } +static inline struct hlist_node * +br_multicast_get_first_rport_node(struct net_bridge *b, struct sk_buff *skb) { + return rcu_dereference(hlist_first_rcu(&b->ip4_mc_router_list)); +} + +static inline struct net_bridge_port * +br_multicast_rport_from_node(struct hlist_node *rp, struct sk_buff *skb) { + return hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist); +} + /* called with rcu_read_lock */ void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, @@ -276,7 +286,8 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst, bool allow_mode_include = true; struct hlist_node *rp; - rp = rcu_dereference(hlist_first_rcu(&br->router_list)); + rp = br_multicast_get_first_rport_node(br, skb); + if (mdst) { p = rcu_dereference(mdst->ports); if (br_multicast_should_handle_mode(br, mdst->addr.proto) && @@ -290,7 +301,7 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct net_bridge_port *port, *lport, *rport; lport = p ? p->key.port : NULL; - rport = hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist); + rport = br_multicast_rport_from_node(rp, skb); if ((unsigned long)lport > (unsigned long)rport) { port = lport;