[patch net-next 12/16] mlxsw: spectrum_switchdev: Flush the mdb when a port is being removed

[Jiri Pirko]

From: Nogah Frankel <nog...@mellanox.com>

When a port is being removed from a bridge, flush the bridge mdb to remove
the mids of that port.

Signed-off-by: Nogah Frankel <nog...@mellanox.com>
Signed-off-by: Jiri Pirko <j...@mellanox.com>
---
 .../ethernet/mellanox/mlxsw/spectrum_switchdev.c   | 39 ++++++++++++++++------
 1 file changed, 29 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c 
b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
index 50c4d7c..bc07873 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
@@ -122,6 +122,10 @@ mlxsw_sp_bridge_port_fdb_flush(struct mlxsw_sp *mlxsw_sp,
                               u16 fid_index);
 
 static void
+mlxsw_sp_bridge_port_mdb_flush(struct mlxsw_sp_port *mlxsw_sp_port,
+                              struct mlxsw_sp_bridge_port *bridge_port);
+
+static void
 mlxsw_sp_bridge_mdb_mc_enable_sync(struct mlxsw_sp_port *mlxsw_sp_port,
                                   struct mlxsw_sp_bridge_device
                                   *bridge_device);
@@ -176,17 +180,11 @@ static void
 mlxsw_sp_bridge_device_destroy(struct mlxsw_sp_bridge *bridge,
                               struct mlxsw_sp_bridge_device *bridge_device)
 {
-       struct mlxsw_sp_mid *mid, *tmp;
-
        list_del(&bridge_device->list);
        if (bridge_device->vlan_enabled)
                bridge->vlan_enabled_exists = false;
        WARN_ON(!list_empty(&bridge_device->ports_list));
-       list_for_each_entry_safe(mid, tmp, &bridge_device->mids_list, list) {
-               list_del(&mid->list);
-               clear_bit(mid->mid, bridge->mids_bitmap);
-               kfree(mid);
-       }
+       WARN_ON(!list_empty(&bridge_device->mids_list));
        kfree(bridge_device);
 }
 
@@ -987,24 +985,28 @@ mlxsw_sp_port_vlan_bridge_leave(struct mlxsw_sp_port_vlan 
*mlxsw_sp_port_vlan)
        struct mlxsw_sp_bridge_vlan *bridge_vlan;
        struct mlxsw_sp_bridge_port *bridge_port;
        u16 vid = mlxsw_sp_port_vlan->vid;
-       bool last;
+       bool last_port, last_vlan;
 
        if (WARN_ON(mlxsw_sp_fid_type(fid) != MLXSW_SP_FID_TYPE_8021Q &&
                    mlxsw_sp_fid_type(fid) != MLXSW_SP_FID_TYPE_8021D))
                return;
 
        bridge_port = mlxsw_sp_port_vlan->bridge_port;
+       last_vlan = list_is_singular(&bridge_port->vlans_list);
        bridge_vlan = mlxsw_sp_bridge_vlan_find(bridge_port, vid);
-       last = list_is_singular(&bridge_vlan->port_vlan_list);
+       last_port = list_is_singular(&bridge_vlan->port_vlan_list);
 
        list_del(&mlxsw_sp_port_vlan->bridge_vlan_node);
        mlxsw_sp_bridge_vlan_put(bridge_vlan);
        mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, BR_STATE_DISABLED);
        mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, false);
-       if (last)
+       if (last_port)
                mlxsw_sp_bridge_port_fdb_flush(mlxsw_sp_port->mlxsw_sp,
                                               bridge_port,
                                               mlxsw_sp_fid_index(fid));
+       if (last_vlan)
+               mlxsw_sp_bridge_port_mdb_flush(mlxsw_sp_port, bridge_port);
+
        mlxsw_sp_port_vlan_fid_leave(mlxsw_sp_port_vlan);
 
        mlxsw_sp_bridge_port_put(mlxsw_sp_port->mlxsw_sp->bridge, bridge_port);
@@ -1580,6 +1582,23 @@ static int mlxsw_sp_port_mdb_del(struct mlxsw_sp_port 
*mlxsw_sp_port,
        return __mlxsw_sp_port_mdb_del(mlxsw_sp_port, bridge_port, mid);
 }
 
+static void
+mlxsw_sp_bridge_port_mdb_flush(struct mlxsw_sp_port *mlxsw_sp_port,
+                              struct mlxsw_sp_bridge_port *bridge_port)
+{
+       struct mlxsw_sp_bridge_device *bridge_device;
+       struct mlxsw_sp_mid *mid, *tmp;
+
+       bridge_device = bridge_port->bridge_device;
+
+       list_for_each_entry_safe(mid, tmp, &bridge_device->mids_list, list) {
+               if (test_bit(mlxsw_sp_port->local_port, mid->ports_in_mid)) {
+                       __mlxsw_sp_port_mdb_del(mlxsw_sp_port, bridge_port,
+                                               mid);
+               }
+       }
+}
+
 static int mlxsw_sp_port_obj_del(struct net_device *dev,
                                 const struct switchdev_obj *obj)
 {
-- 
2.9.5