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mlxsw: spectrum: Relax sanity checks during enslavement

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[ Upstream commit 90045fc9c7 ]

Since commit 25cc72a338 ("mlxsw: spectrum: Forbid linking to devices that
have uppers") the driver forbids enslavement to netdevs that already
have uppers of their own, as this can result in various ordering
problems.

This requirement proved to be too strict for some users who need to be
able to enslave ports to a bridge that already has uppers. In this case,
we can allow the enslavement if the bridge is already known to us, as
any configuration performed on top of the bridge was already reflected
to the device.

Fixes: 25cc72a338 ("mlxsw: spectrum: Forbid linking to devices that have uppers")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reported-by: Alexander Petrovskiy <alexpe@mellanox.com>
Tested-by: Alexander Petrovskiy <alexpe@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ido Schimmel
2017-12-25 09:05:33 +01:00
committed by Greg Kroah-Hartman
parent 0c21439334
commit ce66902de8
3 changed files with 17 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
View File

@@ -4235,7 +4235,10 @@ static int mlxsw_sp_netdevice_port_upper_event(struct net_device *lower_dev,
return -EINVAL;
if (!info->linking)
break;
if (netdev_has_any_upper_dev(upper_dev))
if (netdev_has_any_upper_dev(upper_dev) &&
(!netif_is_bridge_master(upper_dev) ||
!mlxsw_sp_bridge_device_is_offloaded(mlxsw_sp,
upper_dev)))
return -EINVAL;
if (netif_is_lag_master(upper_dev) &&
!mlxsw_sp_master_lag_check(mlxsw_sp, upper_dev,
@@ -4347,6 +4350,7 @@ static int mlxsw_sp_netdevice_port_vlan_event(struct net_device *vlan_dev,
u16 vid)
{
struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct netdev_notifier_changeupper_info *info = ptr;
struct net_device *upper_dev;
int err = 0;
@@ -4358,7 +4362,10 @@ static int mlxsw_sp_netdevice_port_vlan_event(struct net_device *vlan_dev,
return -EINVAL;
if (!info->linking)
break;
if (netdev_has_any_upper_dev(upper_dev))
if (netdev_has_any_upper_dev(upper_dev) &&
(!netif_is_bridge_master(upper_dev) ||
!mlxsw_sp_bridge_device_is_offloaded(mlxsw_sp,
upper_dev)))
return -EINVAL;
break;
case NETDEV_CHANGEUPPER:

2
drivers/net/ethernet/mellanox/mlxsw/spectrum.h
View File

@@ -326,6 +326,8 @@ int mlxsw_sp_port_bridge_join(struct mlxsw_sp_port *mlxsw_sp_port,
void mlxsw_sp_port_bridge_leave(struct mlxsw_sp_port *mlxsw_sp_port,
struct net_device *brport_dev,
struct net_device *br_dev);
bool mlxsw_sp_bridge_device_is_offloaded(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *br_dev);
/* spectrum.c */
int mlxsw_sp_port_ets_set(struct mlxsw_sp_port *mlxsw_sp_port,

6
drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
View File

@@ -134,6 +134,12 @@ mlxsw_sp_bridge_device_find(const struct mlxsw_sp_bridge *bridge,
return NULL;
}
bool mlxsw_sp_bridge_device_is_offloaded(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *br_dev)
{
return !!mlxsw_sp_bridge_device_find(mlxsw_sp->bridge, br_dev);
}
static struct mlxsw_sp_bridge_device *
mlxsw_sp_bridge_device_create(struct mlxsw_sp_bridge *bridge,
struct net_device *br_dev)