linux-kernel - [PATCH 3.13 026/212] bridge: Handle IFLA_ADDRESS correctly when creating bridge device

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Message-Id: <1403041506-13646-27-git-send-email-kamal@canonical.com>
Date:	Tue, 17 Jun 2014 14:42:00 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Toshiaki Makita <makita.toshiaki@....ntt.co.jp>,
	"David S. Miller" <davem@...emloft.net>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13 026/212] bridge: Handle IFLA_ADDRESS correctly when creating bridge device

3.13.11.4 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>

[ Upstream commit 30313a3d5794472c3548d7288e306a5492030370 ]

When bridge device is created with IFLA_ADDRESS, we are not calling
br_stp_change_bridge_id(), which leads to incorrect local fdb
management and bridge id calculation, and prevents us from receiving
frames on the bridge device.

Reported-by: Tom Gundersen <teg@...m.no>
Signed-off-by: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 net/bridge/br_netlink.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index f75d92e..b47b344e 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -446,6 +446,20 @@ static int br_validate(struct nlattr *tb[], struct nlattr *data[])
 	return 0;
 }
 
+static int br_dev_newlink(struct net *src_net, struct net_device *dev,
+			  struct nlattr *tb[], struct nlattr *data[])
+{
+	struct net_bridge *br = netdev_priv(dev);
+
+	if (tb[IFLA_ADDRESS]) {
+		spin_lock_bh(&br->lock);
+		br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
+		spin_unlock_bh(&br->lock);
+	}
+
+	return register_netdevice(dev);
+}
+
 static size_t br_get_link_af_size(const struct net_device *dev)
 {
 	struct net_port_vlans *pv;
@@ -474,6 +488,7 @@ struct rtnl_link_ops br_link_ops __read_mostly = {
 	.priv_size	= sizeof(struct net_bridge),
 	.setup		= br_dev_setup,
 	.validate	= br_validate,
+	.newlink	= br_dev_newlink,
 	.dellink	= br_dev_delete,
 };
 
-- 
1.9.1

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