vxlan: Add vxlan_fdb_replay()
When a VXLAN device becomes relevant to a driver (such as when it is
attached to an offloaded bridge), the driver will generally need to walk
the existing FDB entries and offload them.
Add a function vxlan_fdb_replay() to call a given notifier block for
each FDB entry with a given VNI.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index d3db031..d9cb0d9 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -552,6 +552,53 @@ int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni,
}
EXPORT_SYMBOL_GPL(vxlan_fdb_find_uc);
+static int vxlan_fdb_notify_one(struct notifier_block *nb,
+ const struct vxlan_dev *vxlan,
+ const struct vxlan_fdb *f,
+ const struct vxlan_rdst *rdst)
+{
+ struct switchdev_notifier_vxlan_fdb_info fdb_info;
+ int rc;
+
+ vxlan_fdb_switchdev_notifier_info(vxlan, f, rdst, &fdb_info);
+ rc = nb->notifier_call(nb, SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE,
+ &fdb_info);
+ return notifier_to_errno(rc);
+}
+
+int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
+ struct notifier_block *nb)
+{
+ struct vxlan_dev *vxlan;
+ struct vxlan_rdst *rdst;
+ struct vxlan_fdb *f;
+ unsigned int h;
+ int rc = 0;
+
+ if (!netif_is_vxlan(dev))
+ return -EINVAL;
+ vxlan = netdev_priv(dev);
+
+ spin_lock_bh(&vxlan->hash_lock);
+ for (h = 0; h < FDB_HASH_SIZE; ++h) {
+ hlist_for_each_entry(f, &vxlan->fdb_head[h], hlist) {
+ if (f->vni == vni) {
+ list_for_each_entry(rdst, &f->remotes, list) {
+ rc = vxlan_fdb_notify_one(nb, vxlan,
+ f, rdst);
+ if (rc)
+ goto out;
+ }
+ }
+ }
+ }
+
+out:
+ spin_unlock_bh(&vxlan->hash_lock);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(vxlan_fdb_replay);
+
/* Replace destination of unicast mac */
static int vxlan_fdb_replace(struct vxlan_fdb *f,
union vxlan_addr *ip, __be16 port, __be32 vni,