batman-adv: refactor batadv_neigh_node_* functions to follow common style

Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>

net/batman-adv/bat_iv_ogm.c

@@ -336,7 +336,8 @@ batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface,
 {
 	struct batadv_neigh_node *neigh_node;
 
-	neigh_node = batadv_neigh_node_new(orig_node, hard_iface, neigh_addr);
+	neigh_node = batadv_neigh_node_get_or_create(orig_node,
+						     hard_iface, neigh_addr);
 	if (!neigh_node)
 		goto out;
 

net/batman-adv/bat_v_elp.c

@@ -443,7 +443,8 @@ static void batadv_v_elp_neigh_update(struct batadv_priv *bat_priv,
 	if (!orig_neigh)
 		return;
 
-	neigh = batadv_neigh_node_new(orig_neigh, if_incoming, neigh_addr);
+	neigh = batadv_neigh_node_get_or_create(orig_neigh,
+						if_incoming, neigh_addr);
 	if (!neigh)
 		goto orig_free;
 

net/batman-adv/bat_v_ogm.c

@@ -683,8 +683,8 @@ static void batadv_v_ogm_process(const struct sk_buff *skb, int ogm_offset,
 	if (!orig_node)
 		return;
 
-	neigh_node = batadv_neigh_node_new(orig_node, if_incoming,
-					   ethhdr->h_source);
+	neigh_node = batadv_neigh_node_get_or_create(orig_node, if_incoming,
+						     ethhdr->h_source);
 	if (!neigh_node)
 		goto out;
 

net/batman-adv/originator.c

@@ -602,19 +602,19 @@ batadv_hardif_neigh_get(const struct batadv_hard_iface *hard_iface,
 }
 
 /**
- * batadv_neigh_node_new - create and init a new neigh_node object
+ * batadv_neigh_node_create - create a neigh node object
  * @orig_node: originator object representing the neighbour
  * @hard_iface: the interface where the neighbour is connected to
  * @neigh_addr: the mac address of the neighbour interface
  *
  * Allocates a new neigh_node object and initialises all the generic fields.
  *
- * Return: neighbor when found. Othwerwise NULL
+ * Return: the neighbour node if found or created or NULL otherwise.
  */
-struct batadv_neigh_node *
-batadv_neigh_node_new(struct batadv_orig_node *orig_node,
-		      struct batadv_hard_iface *hard_iface,
-		      const u8 *neigh_addr)
+static struct batadv_neigh_node *
+batadv_neigh_node_create(struct batadv_orig_node *orig_node,
+			 struct batadv_hard_iface *hard_iface,
+			 const u8 *neigh_addr)
 {
 	struct batadv_neigh_node *neigh_node;
 	struct batadv_hardif_neigh_node *hardif_neigh = NULL;
@@ -666,6 +666,29 @@ out:
 	return neigh_node;
 }
 
+/**
+ * batadv_neigh_node_get_or_create - retrieve or create a neigh node object
+ * @orig_node: originator object representing the neighbour
+ * @hard_iface: the interface where the neighbour is connected to
+ * @neigh_addr: the mac address of the neighbour interface
+ *
+ * Return: the neighbour node if found or created or NULL otherwise.
+ */
+struct batadv_neigh_node *
+batadv_neigh_node_get_or_create(struct batadv_orig_node *orig_node,
+				struct batadv_hard_iface *hard_iface,
+				const u8 *neigh_addr)
+{
+	struct batadv_neigh_node *neigh_node = NULL;
+
+	/* first check without locking to avoid the overhead */
+	neigh_node = batadv_neigh_node_get(orig_node, hard_iface, neigh_addr);
+	if (neigh_node)
+		return neigh_node;
+
+	return batadv_neigh_node_create(orig_node, hard_iface, neigh_addr);
+}
+
 /**
  * batadv_hardif_neigh_seq_print_text - print the single hop neighbour list
  * @seq: neighbour table seq_file struct

net/batman-adv/originator.h

@@ -46,9 +46,9 @@ batadv_hardif_neigh_get(const struct batadv_hard_iface *hard_iface,
 void
 batadv_hardif_neigh_put(struct batadv_hardif_neigh_node *hardif_neigh);
 struct batadv_neigh_node *
-batadv_neigh_node_new(struct batadv_orig_node *orig_node,
-		      struct batadv_hard_iface *hard_iface,
-		      const u8 *neigh_addr);
+batadv_neigh_node_get_or_create(struct batadv_orig_node *orig_node,
+				struct batadv_hard_iface *hard_iface,
+				const u8 *neigh_addr);
 void batadv_neigh_node_put(struct batadv_neigh_node *neigh_node);
 struct batadv_neigh_node *
 batadv_orig_router_get(struct batadv_orig_node *orig_node,