net: dsa: sync up switchdev objects and port attributes when joining the bridge

If we join an already-created bridge port, such as a bond master
interface, then we can miss the initial switchdev notifications emitted
by the bridge for this port, while it wasn't offloaded by anybody.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index b8778c5..92282de 100644 (file)
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -262,6 +262,9 @@ static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree *dst,
 
 /* slave.c */
 extern const struct dsa_device_ops notag_netdev_ops;
+extern struct notifier_block dsa_slave_switchdev_notifier;
+extern struct notifier_block dsa_slave_switchdev_blocking_notifier;
+
 void dsa_slave_mii_bus_init(struct dsa_switch *ds);
 int dsa_slave_create(struct dsa_port *dp);
 void dsa_slave_destroy(struct net_device *slave_dev);

diff --git a/net/dsa/port.c b/net/dsa/port.c
index c712bf3..01e3026 100644 (file)
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -170,12 +170,46 @@ static void dsa_port_clear_brport_flags(struct dsa_port *dp)
 static int dsa_port_switchdev_sync(struct dsa_port *dp,
                                   struct netlink_ext_ack *extack)
 {
+       struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
+       struct net_device *br = dp->bridge_dev;
        int err;
 
        err = dsa_port_inherit_brport_flags(dp, extack);
        if (err)
                return err;
 
+       err = dsa_port_set_state(dp, br_port_get_stp_state(brport_dev));
+       if (err && err != -EOPNOTSUPP)
+               return err;
+
+       err = dsa_port_vlan_filtering(dp, br_vlan_enabled(br), extack);
+       if (err && err != -EOPNOTSUPP)
+               return err;
+
+       err = dsa_port_mrouter(dp->cpu_dp, br_multicast_router(br), extack);
+       if (err && err != -EOPNOTSUPP)
+               return err;
+
+       err = dsa_port_ageing_time(dp, br_get_ageing_time(br));
+       if (err && err != -EOPNOTSUPP)
+               return err;
+
+       err = br_mdb_replay(br, brport_dev,
+                           &dsa_slave_switchdev_blocking_notifier,
+                           extack);
+       if (err && err != -EOPNOTSUPP)
+               return err;
+
+       err = br_fdb_replay(br, brport_dev, &dsa_slave_switchdev_notifier);
+       if (err && err != -EOPNOTSUPP)
+               return err;
+
+       err = br_vlan_replay(br, brport_dev,
+                            &dsa_slave_switchdev_blocking_notifier,
+                            extack);
+       if (err && err != -EOPNOTSUPP)
+               return err;
+
        return 0;
 }
 
@@ -198,6 +232,18 @@ static void dsa_port_switchdev_unsync(struct dsa_port *dp)
         * so allow it to be in BR_STATE_FORWARDING to be kept functional
         */
        dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
+
+       /* VLAN filtering is handled by dsa_switch_bridge_leave */
+
+       /* Some drivers treat the notification for having a local multicast
+        * router by allowing multicast to be flooded to the CPU, so we should
+        * allow this in standalone mode too.
+        */
+       dsa_port_mrouter(dp->cpu_dp, true, NULL);
+
+       /* Ageing time may be global to the switch chip, so don't change it
+        * here because we have no good reason (or value) to change it to.
+        */
 }
 
 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 1ff48be..c51e524 100644 (file)
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -2392,11 +2392,11 @@ static struct notifier_block dsa_slave_nb __read_mostly = {
        .notifier_call  = dsa_slave_netdevice_event,
 };
 
-static struct notifier_block dsa_slave_switchdev_notifier = {
+struct notifier_block dsa_slave_switchdev_notifier = {
        .notifier_call = dsa_slave_switchdev_event,
 };
 
-static struct notifier_block dsa_slave_switchdev_blocking_notifier = {
+struct notifier_block dsa_slave_switchdev_blocking_notifier = {
        .notifier_call = dsa_slave_switchdev_blocking_event,
 };