Merge branch 'ovs-notifications'

Nicolas Dichtel says:

====================
ovs: fix rtnl notifications on interface deletion

There was no rtnl notifications for interfaces (gre, vxlan, geneve) created
by ovs. This problem is fixed by adjusting the creation path.

v1 -> v2:
 - add patch #1 and #4
 - rework error handling in patch #2
====================

Acked-by: Pravin B Shelar <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: davem330

drivers/net/geneve.c

@@ -1508,6 +1508,7 @@ struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
 {
 	struct nlattr *tb[IFLA_MAX + 1];
 	struct net_device *dev;
+	LIST_HEAD(list_kill);
 	int err;
 
 	memset(tb, 0, sizeof(tb));
@@ -1519,8 +1520,10 @@ struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
 	err = geneve_configure(net, dev, &geneve_remote_unspec,
 			       0, 0, 0, 0, htons(dst_port), true,
 			       GENEVE_F_UDP_ZERO_CSUM6_RX);
-	if (err)
-		goto err;
+	if (err) {
+		free_netdev(dev);
+		return ERR_PTR(err);
+	}
 
 	/* openvswitch users expect packet sizes to be unrestricted,
 	 * so set the largest MTU we can.
@@ -1529,10 +1532,15 @@ struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
 	if (err)
 		goto err;
 
+	err = rtnl_configure_link(dev, NULL);
+	if (err < 0)
+		goto err;
+
 	return dev;
 
  err:
-	free_netdev(dev);
+	geneve_dellink(dev, &list_kill);
+	unregister_netdevice_many(&list_kill);
 	return ERR_PTR(err);
 }
 EXPORT_SYMBOL_GPL(geneve_dev_create_fb);

drivers/net/vxlan.c

@@ -2952,30 +2952,6 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
 	return 0;
 }
 
-struct net_device *vxlan_dev_create(struct net *net, const char *name,
-				    u8 name_assign_type, struct vxlan_config *conf)
-{
-	struct nlattr *tb[IFLA_MAX+1];
-	struct net_device *dev;
-	int err;
-
-	memset(&tb, 0, sizeof(tb));
-
-	dev = rtnl_create_link(net, name, name_assign_type,
-			       &vxlan_link_ops, tb);
-	if (IS_ERR(dev))
-		return dev;
-
-	err = vxlan_dev_configure(net, dev, conf);
-	if (err < 0) {
-		free_netdev(dev);
-		return ERR_PTR(err);
-	}
-
-	return dev;
-}
-EXPORT_SYMBOL_GPL(vxlan_dev_create);
-
 static int vxlan_newlink(struct net *src_net, struct net_device *dev,
 			 struct nlattr *tb[], struct nlattr *data[])
 {
@@ -3268,6 +3244,40 @@ static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
 	.get_link_net	= vxlan_get_link_net,
 };
 
+struct net_device *vxlan_dev_create(struct net *net, const char *name,
+				    u8 name_assign_type,
+				    struct vxlan_config *conf)
+{
+	struct nlattr *tb[IFLA_MAX + 1];
+	struct net_device *dev;
+	int err;
+
+	memset(&tb, 0, sizeof(tb));
+
+	dev = rtnl_create_link(net, name, name_assign_type,
+			       &vxlan_link_ops, tb);
+	if (IS_ERR(dev))
+		return dev;
+
+	err = vxlan_dev_configure(net, dev, conf);
+	if (err < 0) {
+		free_netdev(dev);
+		return ERR_PTR(err);
+	}
+
+	err = rtnl_configure_link(dev, NULL);
+	if (err < 0) {
+		LIST_HEAD(list_kill);
+
+		vxlan_dellink(dev, &list_kill);
+		unregister_netdevice_many(&list_kill);
+		return ERR_PTR(err);
+	}
+
+	return dev;
+}
+EXPORT_SYMBOL_GPL(vxlan_dev_create);
+
 static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
 					     struct net_device *dev)
 {

net/ipv4/ip_gre.c

@@ -1121,6 +1121,7 @@ struct net_device *gretap_fb_dev_create(struct net *net, const char *name,
 {
 	struct nlattr *tb[IFLA_MAX + 1];
 	struct net_device *dev;
+	LIST_HEAD(list_kill);
 	struct ip_tunnel *t;
 	int err;
 
@@ -1136,8 +1137,10 @@ struct net_device *gretap_fb_dev_create(struct net *net, const char *name,
 	t->collect_md = true;
 
 	err = ipgre_newlink(net, dev, tb, NULL);
-	if (err < 0)
-		goto out;
+	if (err < 0) {
+		free_netdev(dev);
+		return ERR_PTR(err);
+	}
 
 	/* openvswitch users expect packet sizes to be unrestricted,
 	 * so set the largest MTU we can.
@@ -1146,9 +1149,14 @@ struct net_device *gretap_fb_dev_create(struct net *net, const char *name,
 	if (err)
 		goto out;
 
+	err = rtnl_configure_link(dev, NULL);
+	if (err < 0)
+		goto out;
+
 	return dev;
 out:
-	free_netdev(dev);
+	ip_tunnel_dellink(dev, &list_kill);
+	unregister_netdevice_many(&list_kill);
 	return ERR_PTR(err);
 }
 EXPORT_SYMBOL_GPL(gretap_fb_dev_create);