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mlxsw: spectrum: Centralize VLAN-aware bridge ref counting 

We hold a reference count on the number of ports member in the
VLAN-aware bridge, as we only support one.

Instead of always incrementing / decrementing the reference count after
joining / leaving the bridge, simply do this accounting in the join /
leave functions.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2016-06-20 23:04:06 +02:00 committed by David S. Miller
parent 279438952b
commit 7117a570b9
1 changed files with 30 additions and 28 deletions
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58
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
View File

@ -2651,7 +2651,28 @@ static bool mlxsw_sp_port_dev_check(const struct net_device *dev)
return dev->netdev_ops == &mlxsw_sp_port_netdev_ops;
}
static int mlxsw_sp_port_bridge_join(struct mlxsw_sp_port *mlxsw_sp_port)
static bool mlxsw_sp_master_bridge_check(struct mlxsw_sp *mlxsw_sp,
struct net_device *br_dev)
{
return !mlxsw_sp->master_bridge.dev ||
mlxsw_sp->master_bridge.dev == br_dev;
}
static void mlxsw_sp_master_bridge_inc(struct mlxsw_sp *mlxsw_sp,
struct net_device *br_dev)
{
mlxsw_sp->master_bridge.dev = br_dev;
mlxsw_sp->master_bridge.ref_count++;
}
static void mlxsw_sp_master_bridge_dec(struct mlxsw_sp *mlxsw_sp)
{
if (--mlxsw_sp->master_bridge.ref_count == 0)
mlxsw_sp->master_bridge.dev = NULL;
}
static int mlxsw_sp_port_bridge_join(struct mlxsw_sp_port *mlxsw_sp_port,
struct net_device *br_dev)
{
struct net_device *dev = mlxsw_sp_port->dev;
int err;
@ -2665,6 +2686,8 @@ static int mlxsw_sp_port_bridge_join(struct mlxsw_sp_port *mlxsw_sp_port)
if (err)
return err;
mlxsw_sp_master_bridge_inc(mlxsw_sp_port->mlxsw_sp, br_dev);
mlxsw_sp_port->learning = 1;
mlxsw_sp_port->learning_sync = 1;
mlxsw_sp_port->uc_flood = 1;
@ -2683,6 +2706,8 @@ static void mlxsw_sp_port_bridge_leave(struct mlxsw_sp_port *mlxsw_sp_port,
mlxsw_sp_port_pvid_set(mlxsw_sp_port, 1);
mlxsw_sp_master_bridge_dec(mlxsw_sp_port->mlxsw_sp);
mlxsw_sp_port->learning = 0;
mlxsw_sp_port->learning_sync = 0;
mlxsw_sp_port->uc_flood = 0;
@ -2694,26 +2719,6 @@ static void mlxsw_sp_port_bridge_leave(struct mlxsw_sp_port *mlxsw_sp_port,
mlxsw_sp_port_add_vid(dev, 0, 1);
}
static bool mlxsw_sp_master_bridge_check(struct mlxsw_sp *mlxsw_sp,
struct net_device *br_dev)
{
return !mlxsw_sp->master_bridge.dev ||
mlxsw_sp->master_bridge.dev == br_dev;
}
static void mlxsw_sp_master_bridge_inc(struct mlxsw_sp *mlxsw_sp,
struct net_device *br_dev)
{
mlxsw_sp->master_bridge.dev = br_dev;
mlxsw_sp->master_bridge.ref_count++;
}
static void mlxsw_sp_master_bridge_dec(struct mlxsw_sp *mlxsw_sp)
{
if (--mlxsw_sp->master_bridge.ref_count == 0)
mlxsw_sp->master_bridge.dev = NULL;
}
static int mlxsw_sp_lag_create(struct mlxsw_sp *mlxsw_sp, u16 lag_id)
{
char sldr_pl[MLXSW_REG_SLDR_LEN];
@ -2910,7 +2915,6 @@ static void mlxsw_sp_port_lag_leave(struct mlxsw_sp_port *mlxsw_sp_port,
if (mlxsw_sp_port->bridged) {
mlxsw_sp_port_active_vlans_del(mlxsw_sp_port);
mlxsw_sp_port_bridge_leave(mlxsw_sp_port, false);
mlxsw_sp_master_bridge_dec(mlxsw_sp);
}
if (lag->ref_count == 1) {
@ -3049,13 +3053,11 @@ static int mlxsw_sp_netdevice_port_upper_event(struct net_device *dev,
mlxsw_sp_port_vlan_unlink(mlxsw_sp_port,
upper_dev);
} else if (netif_is_bridge_master(upper_dev)) {
if (info->linking) {
err = mlxsw_sp_port_bridge_join(mlxsw_sp_port);
mlxsw_sp_master_bridge_inc(mlxsw_sp, upper_dev);
} else {
if (info->linking)
err = mlxsw_sp_port_bridge_join(mlxsw_sp_port,
upper_dev);
else
mlxsw_sp_port_bridge_leave(mlxsw_sp_port, true);
mlxsw_sp_master_bridge_dec(mlxsw_sp);
}
} else if (netif_is_lag_master(upper_dev)) {
if (info->linking)
err = mlxsw_sp_port_lag_join(mlxsw_sp_port,