From: Ido Schimmel Date: Fri, 24 Aug 2018 12:41:35 +0000 (+0300) Subject: mlxsw: spectrum_switchdev: Do not leak RIFs when removing bridge X-Git-Tag: v4.14.70~102 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fe0d111fea19e7d43d78e6b49f1d682e7177706d;p=platform%2Fkernel%2Flinux-rpi.git mlxsw: spectrum_switchdev: Do not leak RIFs when removing bridge [ Upstream commit 602b74eda81311dbdb5dbab08c30f789f648ebdc ] When a bridge device is removed, the VLANs are flushed from each configured port. This causes the ports to decrement the reference count on the associated FIDs (filtering identifier). If the reference count of a FID is 1 and it has a RIF (router interface), then this RIF is destroyed. However, if no port is member in the VLAN for which a RIF exists, then the RIF will continue to exist after the removal of the bridge. To reproduce: # ip link add name br0 type bridge vlan_filtering 1 # ip link set dev swp1 master br0 # ip link add link br0 name br0.10 type vlan id 10 # ip address add 192.0.2.0/24 dev br0.10 # ip link del dev br0 The RIF associated with br0.10 continues to exist. Fix this by iterating over all the bridge device uppers when it is destroyed and take care of destroying their RIFs. Fixes: 99f44bb3527b ("mlxsw: spectrum: Enable L3 interfaces on top of bridge devices") Signed-off-by: Ido Schimmel Reviewed-by: Petr Machata Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h index 8c4ce0a0cc82..06eeea6b2f93 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h @@ -395,6 +395,8 @@ int mlxsw_sp_netdevice_vrf_event(struct net_device *l3_dev, unsigned long event, void mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan); void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif); +void mlxsw_sp_rif_destroy_by_dev(struct mlxsw_sp *mlxsw_sp, + struct net_device *dev); /* spectrum_kvdl.c */ int mlxsw_sp_kvdl_alloc(struct mlxsw_sp *mlxsw_sp, unsigned int entry_count, diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c index 516e63244606..3ed4fb346f23 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c @@ -5131,6 +5131,17 @@ void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif) mlxsw_sp_vr_put(vr); } +void mlxsw_sp_rif_destroy_by_dev(struct mlxsw_sp *mlxsw_sp, + struct net_device *dev) +{ + struct mlxsw_sp_rif *rif; + + rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); + if (!rif) + return; + mlxsw_sp_rif_destroy(rif); +} + static void mlxsw_sp_rif_subport_params_init(struct mlxsw_sp_rif_params *params, struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c index 7924f241e3ad..32c25772f755 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c @@ -140,6 +140,24 @@ bool mlxsw_sp_bridge_device_is_offloaded(const struct mlxsw_sp *mlxsw_sp, return !!mlxsw_sp_bridge_device_find(mlxsw_sp->bridge, br_dev); } +static int mlxsw_sp_bridge_device_upper_rif_destroy(struct net_device *dev, + void *data) +{ + struct mlxsw_sp *mlxsw_sp = data; + + mlxsw_sp_rif_destroy_by_dev(mlxsw_sp, dev); + return 0; +} + +static void mlxsw_sp_bridge_device_rifs_destroy(struct mlxsw_sp *mlxsw_sp, + struct net_device *dev) +{ + mlxsw_sp_rif_destroy_by_dev(mlxsw_sp, dev); + netdev_walk_all_upper_dev_rcu(dev, + mlxsw_sp_bridge_device_upper_rif_destroy, + mlxsw_sp); +} + static struct mlxsw_sp_bridge_device * mlxsw_sp_bridge_device_create(struct mlxsw_sp_bridge *bridge, struct net_device *br_dev) @@ -176,6 +194,8 @@ static void mlxsw_sp_bridge_device_destroy(struct mlxsw_sp_bridge *bridge, struct mlxsw_sp_bridge_device *bridge_device) { + mlxsw_sp_bridge_device_rifs_destroy(bridge->mlxsw_sp, + bridge_device->dev); list_del(&bridge_device->list); if (bridge_device->vlan_enabled) bridge->vlan_enabled_exists = false;