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net: dsa: install the primary unicast MAC address as standalone port host FDB

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To be able to safely turn off CPU flooding for standalone ports, we need
to ensure that the dev_addr of each DSA slave interface is installed as
a standalone host FDB entry for compatible switches.

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 2022-03-02 21:14:11 +02:00 committed by David S. Miller
parent 5e8a1e03aa
commit 499aa9e1b3
1 changed files with 33 additions and 2 deletions
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35
net/dsa/slave.c
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@ -175,6 +175,7 @@ static int dsa_slave_open(struct net_device *dev)
{
struct net_device *master = dsa_slave_to_master(dev);
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
int err;
err = dev_open(master, NULL);
@ -183,10 +184,16 @@ static int dsa_slave_open(struct net_device *dev)
goto out;
}
if (dsa_switch_supports_uc_filtering(ds)) {
err = dsa_port_standalone_host_fdb_add(dp, dev->dev_addr, 0);
if (err)
goto out;
}
if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
err = dev_uc_add(master, dev->dev_addr);
if (err < 0)
goto out;
goto del_host_addr;
}
err = dsa_port_enable_rt(dp, dev->phydev);
@ -198,6 +205,9 @@ static int dsa_slave_open(struct net_device *dev)
del_unicast:
if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
dev_uc_del(master, dev->dev_addr);
del_host_addr:
if (dsa_switch_supports_uc_filtering(ds))
dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
out:
return err;
}
@ -206,12 +216,16 @@ static int dsa_slave_close(struct net_device *dev)
{
struct net_device *master = dsa_slave_to_master(dev);
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
dsa_port_disable_rt(dp);
if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
dev_uc_del(master, dev->dev_addr);
if (dsa_switch_supports_uc_filtering(ds))
dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
return 0;
}
@ -244,24 +258,41 @@ static void dsa_slave_set_rx_mode(struct net_device *dev)
static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
{
struct net_device *master = dsa_slave_to_master(dev);
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
struct sockaddr *addr = a;
int err;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
if (dsa_switch_supports_uc_filtering(ds)) {
err = dsa_port_standalone_host_fdb_add(dp, addr->sa_data, 0);
if (err)
return err;
}
if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
err = dev_uc_add(master, addr->sa_data);
if (err < 0)
return err;
goto del_unicast;
}
if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
dev_uc_del(master, dev->dev_addr);
if (dsa_switch_supports_uc_filtering(ds))
dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
eth_hw_addr_set(dev, addr->sa_data);
return 0;
del_unicast:
if (dsa_switch_supports_uc_filtering(ds))
dsa_port_standalone_host_fdb_del(dp, addr->sa_data, 0);
return err;
}
struct dsa_slave_dump_ctx {