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Commit 68c3cd92 authored by Petr Machata's avatar Petr Machata Committed by David S. Miller
Browse files

mlxsw: spectrum_router: Handle MTU change of GRE netdevs 



Update MTU of overlay loopback in accordance with the setting on the
tunnel netdevice.

Fixes: 0063587d ("mlxsw: spectrum: Support decap-only IP-in-IP tunnels")
Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 22b99058

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c

+24 −0
Original line number Diff line number Diff line
@@ -1407,6 +1407,28 @@ mlxsw_sp_rif_ipip_lb_op(struct mlxsw_sp_rif_ipip_lb *lb_rif, 
	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);

}



static int mlxsw_sp_netdevice_ipip_ol_update_mtu(struct mlxsw_sp *mlxsw_sp,

						 struct net_device *ol_dev)

{

	struct mlxsw_sp_ipip_entry *ipip_entry;

	struct mlxsw_sp_rif_ipip_lb *lb_rif;

	struct mlxsw_sp_vr *ul_vr;

	int err = 0;



	ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);

	if (ipip_entry) {

		lb_rif = ipip_entry->ol_lb;

		ul_vr = &mlxsw_sp->router->vrs[lb_rif->ul_vr_id];

		err = mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr, true);

		if (err)

			goto out;

		lb_rif->common.mtu = ol_dev->mtu;

	}



out:

	return err;

}



static void mlxsw_sp_netdevice_ipip_ol_up_event(struct mlxsw_sp *mlxsw_sp,

						struct net_device *ol_dev)

{
@@ -1687,6 +1709,8 @@ int mlxsw_sp_netdevice_ipip_ol_event(struct mlxsw_sp *mlxsw_sp, 
		extack = info->extack;

		return mlxsw_sp_netdevice_ipip_ol_change_event(mlxsw_sp,

							       ol_dev, extack);

	case NETDEV_CHANGEMTU:

		return mlxsw_sp_netdevice_ipip_ol_update_mtu(mlxsw_sp, ol_dev);

	}

	return 0;

}