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net: team: Unsync device addresses on ndo_stop

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[ Upstream commit bd60234222b2fd5573526da7bcd422801f271f5f ]

Netdev drivers are expected to call dev_{uc,mc}_sync() in their
ndo_set_rx_mode method and dev_{uc,mc}_unsync() in their ndo_stop method.
This is mentioned in the kerneldoc for those dev_* functions.

The team driver calls dev_{uc,mc}_unsync() during ndo_uninit instead of
ndo_stop. This is ineffective because address lists (dev->{uc,mc}) have
already been emptied in unregister_netdevice_many() before ndo_uninit is
called. This mistake can result in addresses being leftover on former team
ports after a team device has been deleted; see test_LAG_cleanup() in the
last patch in this series.

Add unsync calls at their expected location, team_close().

v3:
* When adding or deleting a port, only sync/unsync addresses if the team
  device is up. In other cases, it is taken care of at the right time by
  ndo_open/ndo_set_rx_mode/ndo_stop.

Fixes: 3d249d4ca7 ("net: introduce ethernet teaming device")
Signed-off-by: Benjamin Poirier <bpoirier@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Benjamin Poirier 2022-09-07 16:56:41 +09:00 committed by Greg Kroah-Hartman
parent bffcdade25
commit edda7614d3
1 changed files with 18 additions and 6 deletions
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24
drivers/net/team/team.c
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@ -1280,10 +1280,12 @@ static int team_port_add(struct team *team, struct net_device *port_dev,
}
}
netif_addr_lock_bh(dev);
dev_uc_sync_multiple(port_dev, dev);
dev_mc_sync_multiple(port_dev, dev);
netif_addr_unlock_bh(dev);
if (dev->flags & IFF_UP) {
netif_addr_lock_bh(dev);
dev_uc_sync_multiple(port_dev, dev);
dev_mc_sync_multiple(port_dev, dev);
netif_addr_unlock_bh(dev);
}
port->index = -1;
list_add_tail_rcu(&port->list, &team->port_list);
@ -1354,8 +1356,10 @@ static int team_port_del(struct team *team, struct net_device *port_dev)
netdev_rx_handler_unregister(port_dev);
team_port_disable_netpoll(port);
vlan_vids_del_by_dev(port_dev, dev);
dev_uc_unsync(port_dev, dev);
dev_mc_unsync(port_dev, dev);
if (dev->flags & IFF_UP) {
dev_uc_unsync(port_dev, dev);
dev_mc_unsync(port_dev, dev);
}
dev_close(port_dev);
team_port_leave(team, port);
@ -1703,6 +1707,14 @@ static int team_open(struct net_device *dev)
static int team_close(struct net_device *dev)
{
struct team *team = netdev_priv(dev);
struct team_port *port;
list_for_each_entry(port, &team->port_list, list) {
dev_uc_unsync(port->dev, dev);
dev_mc_unsync(port->dev, dev);
}
return 0;
}