vxlan: don't flush static fdb entries on admin down

This patch skips flushing static fdb entries in
ndo_stop, but flushes all fdb entries during vxlan
device delete. This is consistent with the bridge
driver fdb

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 8a79cfcac889..746a819f0a41 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -2354,7 +2354,7 @@ static int vxlan_open(struct net_device *dev)
 }
 
 /* Purge the forwarding table */
-static void vxlan_flush(struct vxlan_dev *vxlan)
+static void vxlan_flush(struct vxlan_dev *vxlan, bool do_all)
 {
         unsigned int h;
 
@@ -2364,6 +2364,8 @@ static void vxlan_flush(struct vxlan_dev *vxlan)
                 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
                         struct vxlan_fdb *f
                                 = container_of(p, struct vxlan_fdb, hlist);
+                        if (!do_all && (f->state & (NUD_PERMANENT | NUD_NOARP)))
+                                continue;
                         /* the all_zeros_mac entry is deleted at vxlan_uninit */
                         if (!is_zero_ether_addr(f->eth_addr))
                                 vxlan_fdb_destroy(vxlan, f);
@@ -2385,7 +2387,7 @@ static int vxlan_stop(struct net_device *dev)
 
         del_timer_sync(&vxlan->age_timer);
 
-        vxlan_flush(vxlan);
+        vxlan_flush(vxlan, false);
         vxlan_sock_release(vxlan);
 
         return ret;
@@ -3058,6 +3060,8 @@ static void vxlan_dellink(struct net_device *dev, struct list_head *head)
         struct vxlan_dev *vxlan = netdev_priv(dev);
         struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
 
+        vxlan_flush(vxlan, true);
+
         spin_lock(&vn->sock_lock);
         if (!hlist_unhashed(&vxlan->hlist))
                 hlist_del_rcu(&vxlan->hlist);