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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>
This commit is contained in:
Vladimir Oltean 2021-03-23 01:51:50 +02:00 committed by David S. Miller
parent 5961d6a12c
commit 010e269f91
3 changed files with 51 additions and 2 deletions
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3
net/dsa/dsa_priv.h
View File

@ -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);

46
net/dsa/port.c
View File

@ -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,

4
net/dsa/slave.c
View File

@ -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,
};