From patchwork Wed Feb 13 22:00:11 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vlad Yasevich X-Patchwork-Id: 220270 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 167762C008C for ; Thu, 14 Feb 2013 09:00:54 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964950Ab3BMWAt (ORCPT ); Wed, 13 Feb 2013 17:00:49 -0500 Received: from mx1.redhat.com ([209.132.183.28]:6749 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934131Ab3BMWAs (ORCPT ); Wed, 13 Feb 2013 17:00:48 -0500 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r1DM0lBI016237 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 13 Feb 2013 17:00:47 -0500 Received: from vyasevic.redhat.com (ovpn-113-148.phx2.redhat.com [10.3.113.148]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id r1DM0LIf021631; Wed, 13 Feb 2013 17:00:45 -0500 From: Vlad Yasevich To: shemminger@vyatta.com Cc: bridge@lists.linux-foundation.org, davem@davemloft.net, netdev@vger.kernel.org Subject: [PATCH v11 net-next 03/12] bridge: Verify that a vlan is allowed to egress on given port Date: Wed, 13 Feb 2013 17:00:11 -0500 Message-Id: <1360792820-14116-4-git-send-email-vyasevic@redhat.com> In-Reply-To: <1360792820-14116-1-git-send-email-vyasevic@redhat.com> References: <1360792820-14116-1-git-send-email-vyasevic@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.11 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org When bridge forwards a frame, make sure that a frame is allowed to egress on that port. Signed-off-by: Vlad Yasevich --- net/bridge/br_forward.c | 1 + net/bridge/br_input.c | 10 ++++++++++ net/bridge/br_private.h | 10 ++++++++++ net/bridge/br_vlan.c | 20 ++++++++++++++++++++ 4 files changed, 41 insertions(+), 0 deletions(-) diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c index 02015a5..35b0671 100644 --- a/net/bridge/br_forward.c +++ b/net/bridge/br_forward.c @@ -31,6 +31,7 @@ static inline int should_deliver(const struct net_bridge_port *p, const struct sk_buff *skb) { return (((p->flags & BR_HAIRPIN_MODE) || skb->dev != p->dev) && + br_allowed_egress(p->br, nbp_get_vlan_info(p), skb) && p->state == BR_STATE_FORWARDING); } diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index 4ef3f6b..787d7da 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -35,6 +35,16 @@ static int br_pass_frame_up(struct sk_buff *skb) brstats->rx_bytes += skb->len; u64_stats_update_end(&brstats->syncp); + /* Bridge is just like any other port. Make sure the + * packet is allowed except in promisc modue when someone + * may be running packet capture. + */ + if (!(brdev->flags & IFF_PROMISC) && + !br_allowed_egress(br, br_get_vlan_info(br), skb)) { + kfree_skb(skb); + return NET_RX_DROP; + } + indev = skb->dev; skb->dev = brdev; diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 12da56e..200d26b 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -554,6 +554,9 @@ static inline void br_mdb_uninit(void) #ifdef CONFIG_BRIDGE_VLAN_FILTERING extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, struct sk_buff *skb); +extern bool br_allowed_egress(struct net_bridge *br, + const struct net_port_vlans *v, + const struct sk_buff *skb); extern int br_vlan_add(struct net_bridge *br, u16 vid); extern int br_vlan_delete(struct net_bridge *br, u16 vid); extern void br_vlan_flush(struct net_bridge *br); @@ -598,6 +601,13 @@ static inline bool br_allowed_ingress(struct net_bridge *br, return true; } +static inline bool br_allowed_egress(struct net_bridge *br, + const struct net_port_vlans *v, + const struct sk_buff *skb) +{ + return true; +} + static inline int br_vlan_add(struct net_bridge *br, u16 vid) { return -EOPNOTSUPP; diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index 8b4bcd8..d8690bf 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -89,6 +89,26 @@ bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, return false; } +/* Called under RCU. */ +bool br_allowed_egress(struct net_bridge *br, + const struct net_port_vlans *v, + const struct sk_buff *skb) +{ + u16 vid; + + if (!br->vlan_enabled) + return true; + + if (!v) + return false; + + br_vlan_get_tag(skb, &vid); + if (test_bit(vid, v->vlan_bitmap)) + return true; + + return false; +} + /* Must be protected by RTNL */ int br_vlan_add(struct net_bridge *br, u16 vid) {