bridge: Add br_fdb_clear_offload()
When a driver unoffloads all FDB entries en bloc, it's inefficient to
send the switchdev notification one by one. Add a helper that unsets the
offload flag on FDB entries on a given bridge port and VLAN.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/if_bridge.h b/include/linux/if_bridge.h
index ef7c3d3..627b788 100644
--- a/include/linux/if_bridge.h
+++ b/include/linux/if_bridge.h
@@ -119,6 +119,7 @@
struct net_device *br_fdb_find_port(const struct net_device *br_dev,
const unsigned char *addr,
__u16 vid);
+void br_fdb_clear_offload(const struct net_device *dev, u16 vid);
bool br_port_flag_is_set(const struct net_device *dev, unsigned long flag);
#else
static inline struct net_device *
@@ -128,6 +129,11 @@
{
return NULL;
}
+
+static inline void br_fdb_clear_offload(const struct net_device *dev, u16 vid)
+{
+}
+
static inline bool
br_port_flag_is_set(const struct net_device *dev, unsigned long flag)
{
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index e56ba39..38b1d0d 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -1164,3 +1164,23 @@
spin_unlock_bh(&br->hash_lock);
}
+
+void br_fdb_clear_offload(const struct net_device *dev, u16 vid)
+{
+ struct net_bridge_fdb_entry *f;
+ struct net_bridge_port *p;
+
+ ASSERT_RTNL();
+
+ p = br_port_get_rtnl(dev);
+ if (!p)
+ return;
+
+ spin_lock_bh(&p->br->hash_lock);
+ hlist_for_each_entry(f, &p->br->fdb_list, fdb_node) {
+ if (f->dst == p && f->key.vlan_id == vid)
+ f->offloaded = 0;
+ }
+ spin_unlock_bh(&p->br->hash_lock);
+}
+EXPORT_SYMBOL_GPL(br_fdb_clear_offload);
