From patchwork Thu May 15 16:56:53 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vlad Yasevich X-Patchwork-Id: 349313 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 9628A1400D4 for ; Fri, 16 May 2014 02:58:43 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755219AbaEOQ6L (ORCPT ); Thu, 15 May 2014 12:58:11 -0400 Received: from mx1.redhat.com ([209.132.183.28]:15685 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754605AbaEOQ5M (ORCPT ); Thu, 15 May 2014 12:57:12 -0400 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s4FGv996025815 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 15 May 2014 12:57:09 -0400 Received: from vyasevic.redhat.com (vpn-50-142.rdu2.redhat.com [10.10.50.142]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id s4FGv00H015429; Thu, 15 May 2014 12:57:08 -0400 From: Vlad Yasevich To: netdev@vger.kernel.org Cc: bridge@lists.linux-foundation.org, shemminger@vyatta.com, mst@redhat.com, john.r.fastabend@intel.com, jhs@mojatatu.com, Vlad Yasevich Subject: [PATCH v2 net-next 5/8] bridge: Add addresses from static fdbs to non-promisc ports Date: Thu, 15 May 2014 12:56:53 -0400 Message-Id: <1400173016-8952-6-git-send-email-vyasevic@redhat.com> In-Reply-To: <1400173016-8952-1-git-send-email-vyasevic@redhat.com> References: <1400173016-8952-1-git-send-email-vyasevic@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org When a static fdb entry is created, add the mac address from this fdb entry to any ports that are currently running in non-promiscuous mode. These ports need this data so that they can receive traffic destined to these addresses. By default ports start in promiscuous mode, so this feature is disabled. Signed-off-by: Vlad Yasevich Acked-by: Michael S. Tsirkin --- net/bridge/br_fdb.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 70 insertions(+), 6 deletions(-) diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index fe124e5..834ca8c 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -85,8 +85,58 @@ static void fdb_rcu_free(struct rcu_head *head) kmem_cache_free(br_fdb_cache, ent); } +/* When a static FDB entry is added, the mac address from the entry is + * added to the bridge private HW address list and all required ports + * are then updated with the new information. + * Called under RTNL. + */ +static void fdb_add_hw(struct net_bridge *br, const unsigned char *addr) +{ + int err; + struct net_bridge_port *p, *tmp; + + ASSERT_RTNL(); + + list_for_each_entry(p, &br->port_list, list) { + if (!br_promisc_port(p)) { + err = dev_uc_add(p->dev, addr); + if (err) + goto undo; + } + } + + return; +undo: + list_for_each_entry(tmp, &br->port_list, list) { + if (tmp == p) + break; + if (!br_promisc_port(tmp)) + dev_uc_del(tmp->dev, addr); + } +} + +/* When a static FDB entry is deleted, the HW address from that entry is + * also removed from the bridge private HW address list and updates all + * the ports with needed information. + * Called under RTNL. + */ +static void fdb_del_hw(struct net_bridge *br, const unsigned char *addr) +{ + struct net_bridge_port *p; + + ASSERT_RTNL(); + + list_for_each_entry(p, &br->port_list, list) { + if (!br_promisc_port(p)) + dev_uc_del(p->dev, addr); + } +} + static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f) { + if (f->is_static) + fdb_del_hw(br, f->addr.addr); + hlist_del_rcu(&f->hlist); fdb_notify(br, f, RTM_DELNEIGH); call_rcu(&f->rcu, fdb_rcu_free); @@ -466,6 +516,7 @@ static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, return -ENOMEM; fdb->is_local = fdb->is_static = 1; + fdb_add_hw(br, addr); fdb_notify(br, fdb, RTM_NEWNEIGH); return 0; } @@ -678,16 +729,29 @@ static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr, } if (fdb_to_nud(fdb) != state) { - if (state & NUD_PERMANENT) - fdb->is_local = fdb->is_static = 1; - else if (state & NUD_NOARP) { + if (state & NUD_PERMANENT) { + fdb->is_local = 1; + if (!fdb->is_static) { + fdb->is_static = 1; + fdb_add_hw(br, addr); + } + } else if (state & NUD_NOARP) { + fdb->is_local = 0; + if (!fdb->is_static) { + fdb->is_static = 1; + fdb_add_hw(br, addr); + } + } else { fdb->is_local = 0; - fdb->is_static = 1; - } else - fdb->is_local = fdb->is_static = 0; + if (fdb->is_static) { + fdb->is_static = 0; + fdb_del_hw(br, addr); + } + } modified = true; } + fdb->added_by_user = 1; fdb->used = jiffies;