linux-kernel - [PATCH 4.9 25/51] bridge: netlink: call br_changelink() during br_dev

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Date:   Thu,  2 Feb 2017 19:37:44 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ivan Vecera <cera@...a.cz>,
        Jiri Pirko <jiri@...lanox.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.9 25/51] bridge: netlink: call br_changelink() during br_dev_newlink()

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

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

From: Ivan Vecera <cera@...a.cz>


[ Upstream commit b6677449dff674cf5b81429b11d5c7f358852ef9 ]

Any bridge options specified during link creation (e.g. ip link add)
are ignored as br_dev_newlink() does not process them.
Use br_changelink() to do it.

Fixes: 133235161721 ("bridge: implement rtnl_link_ops->changelink")
Signed-off-by: Ivan Vecera <cera@...a.cz>
Reviewed-by: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/bridge/br_netlink.c |   33 +++++++++++++++++++--------------
 1 file changed, 19 insertions(+), 14 deletions(-)

--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -781,20 +781,6 @@ static int br_validate(struct nlattr *tb
 	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 int br_port_slave_changelink(struct net_device *brdev,
 				    struct net_device *dev,
 				    struct nlattr *tb[],
@@ -1093,6 +1079,25 @@ static int br_changelink(struct net_devi
 	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);
+	int err;
+
+	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);
+	}
+
+	err = br_changelink(dev, tb, data);
+	if (err)
+		return err;
+
+	return register_netdevice(dev);
+}
+
 static size_t br_get_size(const struct net_device *brdev)
 {
 	return nla_total_size(sizeof(u32)) +	/* IFLA_BR_FORWARD_DELAY  */