vxlan: Rename FDB Tx lookup function

vxlan_find_mac() is only expected to be called from the Tx path as it
updates the 'used' timestamp. Rename it to vxlan_find_mac_tx() to
reflect that and to avoid incorrect updates of this timestamp like those
addressed by commit 9722f83 ("vxlan: Avoid unnecessary updates to
FDB 'used' time").

No functional changes intended.

Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20250415121143.345227-12-idosch@nvidia.com
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Author: idosch

drivers/net/vxlan/vxlan_core.c

@@ -429,8 +429,8 @@ static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
 	return NULL;
 }
 
-static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
-					const u8 *mac, __be32 vni)
+static struct vxlan_fdb *vxlan_find_mac_tx(struct vxlan_dev *vxlan,
+					   const u8 *mac, __be32 vni)
 {
 	struct vxlan_fdb *f;
 
@@ -1897,7 +1897,7 @@ static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
 		}
 
 		rcu_read_lock();
-		f = vxlan_find_mac(vxlan, n->ha, vni);
+		f = vxlan_find_mac_tx(vxlan, n->ha, vni);
 		if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
 			/* bridge-local neighbor */
 			neigh_release(n);
@@ -2063,7 +2063,7 @@ static int neigh_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
 			goto out;
 		}
 
-		f = vxlan_find_mac(vxlan, n->ha, vni);
+		f = vxlan_find_mac_tx(vxlan, n->ha, vni);
 		if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
 			/* bridge-local neighbor */
 			neigh_release(n);
@@ -2762,19 +2762,19 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	eth = eth_hdr(skb);
 	rcu_read_lock();
-	f = vxlan_find_mac(vxlan, eth->h_dest, vni);
+	f = vxlan_find_mac_tx(vxlan, eth->h_dest, vni);
 	did_rsc = false;
 
 	if (f && (f->flags & NTF_ROUTER) && (vxlan->cfg.flags & VXLAN_F_RSC) &&
 	    (ntohs(eth->h_proto) == ETH_P_IP ||
 	     ntohs(eth->h_proto) == ETH_P_IPV6)) {
 		did_rsc = route_shortcircuit(dev, skb);
 		if (did_rsc)
-			f = vxlan_find_mac(vxlan, eth->h_dest, vni);
+			f = vxlan_find_mac_tx(vxlan, eth->h_dest, vni);
 	}
 
 	if (f == NULL) {
-		f = vxlan_find_mac(vxlan, all_zeros_mac, vni);
+		f = vxlan_find_mac_tx(vxlan, all_zeros_mac, vni);
 		if (f == NULL) {
 			if ((vxlan->cfg.flags & VXLAN_F_L2MISS) &&
 			    !is_multicast_ether_addr(eth->h_dest))