net: bridge: Extract boilerplate around switchdev_port_obj_*()

A call to switchdev_port_obj_add() or switchdev_port_obj_del() involves
initializing a struct switchdev_obj_port_vlan, a piece of code that
repeats on each call site almost verbatim. While in the current codebase
there is just one duplicated add call, the follow-up patches add more of
both add and del calls.

Thus to remove the duplication, extract the repetition into named
functions and reuse.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_private.h

@@ -1139,6 +1139,8 @@ int br_switchdev_set_port_flag(struct net_bridge_port *p,
 			       unsigned long mask);
 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
 			     int type);
+int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags);
+int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
 
 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
 {
@@ -1168,6 +1170,17 @@ static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
 	return 0;
 }
 
+static inline int br_switchdev_port_vlan_add(struct net_device *dev,
+					     u16 vid, u16 flags)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
+{
+	return -EOPNOTSUPP;
+}
+
 static inline void
 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
 {

net/bridge/br_switchdev.c

@@ -136,3 +136,28 @@ br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
 		break;
 	}
 }
+
+int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags)
+{
+	struct switchdev_obj_port_vlan v = {
+		.obj.orig_dev = dev,
+		.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
+		.flags = flags,
+		.vid_begin = vid,
+		.vid_end = vid,
+	};
+
+	return switchdev_port_obj_add(dev, &v.obj);
+}
+
+int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
+{
+	struct switchdev_obj_port_vlan v = {
+		.obj.orig_dev = dev,
+		.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
+		.vid_begin = vid,
+		.vid_end = vid,
+	};
+
+	return switchdev_port_obj_del(dev, &v.obj);
+}

net/bridge/br_vlan.c

@@ -82,19 +82,12 @@ static bool __vlan_add_flags(struct net_bridge_vlan *v, u16 flags)
 static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br,
 			  u16 vid, u16 flags)
 {
-	struct switchdev_obj_port_vlan v = {
-		.obj.orig_dev = dev,
-		.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
-		.flags = flags,
-		.vid_begin = vid,
-		.vid_end = vid,
-	};
 	int err;
 
 	/* Try switchdev op first. In case it is not supported, fallback to
 	 * 8021q add.
 	 */
-	err = switchdev_port_obj_add(dev, &v.obj);
+	err = br_switchdev_port_vlan_add(dev, vid, flags);
 	if (err == -EOPNOTSUPP)
 		return vlan_vid_add(dev, br->vlan_proto, vid);
 	return err;
@@ -130,18 +123,12 @@ static void __vlan_del_list(struct net_bridge_vlan *v)
 static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br,
 			  u16 vid)
 {
-	struct switchdev_obj_port_vlan v = {
-		.obj.orig_dev = dev,
-		.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
-		.vid_begin = vid,
-		.vid_end = vid,
-	};
 	int err;
 
 	/* Try switchdev op first. In case it is not supported, fallback to
 	 * 8021q del.
 	 */
-	err = switchdev_port_obj_del(dev, &v.obj);
+	err = br_switchdev_port_vlan_del(dev, vid);
 	if (err == -EOPNOTSUPP) {
 		vlan_vid_del(dev, br->vlan_proto, vid);
 		return 0;
@@ -1053,13 +1040,6 @@ err_vlan_enabled:
 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
 		 bool *changed)
 {
-	struct switchdev_obj_port_vlan v = {
-		.obj.orig_dev = port->dev,
-		.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
-		.flags = flags,
-		.vid_begin = vid,
-		.vid_end = vid,
-	};
 	struct net_bridge_vlan *vlan;
 	int ret;
 
@@ -1069,7 +1049,7 @@ int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
 	vlan = br_vlan_find(nbp_vlan_group(port), vid);
 	if (vlan) {
 		/* Pass the flags to the hardware bridge */
-		ret = switchdev_port_obj_add(port->dev, &v.obj);
+		ret = br_switchdev_port_vlan_add(port->dev, vid, flags);
 		if (ret && ret != -EOPNOTSUPP)
 			return ret;
 		*changed = __vlan_add_flags(vlan, flags);