net: Add extack to ndo_add_slave

Pass extack to do_set_master and down to ndo_add_slave

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index c2c9867..e7d5fbb 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -867,7 +867,8 @@ static int batadv_softif_init_late(struct net_device *dev)
  * Return: 0 if successful or error otherwise.
  */
 static int batadv_softif_slave_add(struct net_device *dev,
-				   struct net_device *slave_dev)
+				   struct net_device *slave_dev,
+				   struct netlink_ext_ack *extack)
 {
 	struct batadv_hard_iface *hard_iface;
 	struct net *net = dev_net(dev);
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index f6b6a92..cb0131d 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -320,7 +320,8 @@ void br_netpoll_disable(struct net_bridge_port *p)
 
 #endif
 
-static int br_add_slave(struct net_device *dev, struct net_device *slave_dev)
+static int br_add_slave(struct net_device *dev, struct net_device *slave_dev,
+			struct netlink_ext_ack *extack)
 
 {
 	struct net_bridge *br = netdev_priv(dev);
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 1ee98b1..c5ee429 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1957,7 +1957,8 @@ static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
 	return err;
 }
 
-static int do_set_master(struct net_device *dev, int ifindex)
+static int do_set_master(struct net_device *dev, int ifindex,
+			 struct netlink_ext_ack *extack)
 {
 	struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
 	const struct net_device_ops *ops;
@@ -1982,7 +1983,7 @@ static int do_set_master(struct net_device *dev, int ifindex)
 			return -EINVAL;
 		ops = upper_dev->netdev_ops;
 		if (ops->ndo_add_slave) {
-			err = ops->ndo_add_slave(upper_dev, dev);
+			err = ops->ndo_add_slave(upper_dev, dev, extack);
 			if (err)
 				return err;
 		} else {
@@ -2115,7 +2116,7 @@ static int do_setlink(const struct sk_buff *skb,
 	}
 
 	if (tb[IFLA_MASTER]) {
-		err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
+		err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
 		if (err)
 			goto errout;
 		status |= DO_SETLINK_MODIFIED;
@@ -2753,7 +2754,8 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
 				goto out_unregister;
 		}
 		if (tb[IFLA_MASTER]) {
-			err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
+			err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]),
+					    extack);
 			if (err)
 				goto out_unregister;
 		}