Commit 07c78536 authored by Ido Schimmel's avatar Ido Schimmel Committed by Jakub Kicinski
Browse files

mlxsw: spectrum_router: Create loopback RIF during initialization 



Up until now RIFs (router interfaces) were created on demand (e.g.,
when an IP address was added to a netdev). However, sometimes the device
needs to be provided with a RIF when one might not be available.

For example, adjacency entries that drop packets need to be programmed
with an egress RIF despite the RIF not being used to forward packets.

Create such a RIF during initialization so that it could be used later
on to support blackhole nexthops.

Signed-off-by: default avatarIdo Schimmel <idosch@nvidia.com>
Reviewed-by: default avatarJiri Pirko <jiri@nvidia.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 23c01ed3

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

+31 −0
Original line number Diff line number Diff line
@@ -8918,6 +8918,30 @@ static void mlxsw_sp_router_ll_op_ctx_fini(struct mlxsw_sp_router *router) 
	kfree(router->ll_op_ctx);

}



static int mlxsw_sp_lb_rif_init(struct mlxsw_sp *mlxsw_sp)

{

	u16 lb_rif_index;

	int err;



	/* Create a generic loopback RIF associated with the main table

	 * (default VRF). Any table can be used, but the main table exists

	 * anyway, so we do not waste resources.

	 */

	err = mlxsw_sp_router_ul_rif_get(mlxsw_sp, RT_TABLE_MAIN,

					 &lb_rif_index);

	if (err)

		return err;



	mlxsw_sp->router->lb_rif_index = lb_rif_index;



	return 0;

}



static void mlxsw_sp_lb_rif_fini(struct mlxsw_sp *mlxsw_sp)

{

	mlxsw_sp_router_ul_rif_put(mlxsw_sp, mlxsw_sp->router->lb_rif_index);

}



int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp,

			 struct netlink_ext_ack *extack)

{
@@ -8974,6 +8998,10 @@ int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp, 
	if (err)

		goto err_vrs_init;



	err = mlxsw_sp_lb_rif_init(mlxsw_sp);

	if (err)

		goto err_lb_rif_init;



	err = mlxsw_sp_neigh_init(mlxsw_sp);

	if (err)

		goto err_neigh_init;
@@ -9039,6 +9067,8 @@ int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp, 
err_mp_hash_init:

	mlxsw_sp_neigh_fini(mlxsw_sp);

err_neigh_init:

	mlxsw_sp_lb_rif_fini(mlxsw_sp);

err_lb_rif_init:

	mlxsw_sp_vrs_fini(mlxsw_sp);

err_vrs_init:

	mlxsw_sp_mr_fini(mlxsw_sp);
@@ -9074,6 +9104,7 @@ void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) 
	mlxsw_core_flush_owq();

	WARN_ON(!list_empty(&mlxsw_sp->router->fib_event_queue));

	mlxsw_sp_neigh_fini(mlxsw_sp);

	mlxsw_sp_lb_rif_fini(mlxsw_sp);

	mlxsw_sp_vrs_fini(mlxsw_sp);

	mlxsw_sp_mr_fini(mlxsw_sp);

	mlxsw_sp_lpm_fini(mlxsw_sp);

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

+1 −0
Original line number Diff line number Diff line
@@ -75,6 +75,7 @@ struct mlxsw_sp_router { 
	/* One set of ops for each protocol: IPv4 and IPv6 */

	const struct mlxsw_sp_router_ll_ops *proto_ll_ops[MLXSW_SP_L3_PROTO_MAX];

	struct mlxsw_sp_fib_entry_op_ctx *ll_op_ctx;

	u16 lb_rif_index;

};



struct mlxsw_sp_fib_entry_priv {