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mlxsw: spectrum_router: Create loopback RIF during initialization

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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: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ido Schimmel
2020-11-23 09:12:21 +02:00
committed by Jakub Kicinski
parent 23c01ed3b0
commit 07c78536ef
2 changed files with 32 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
View File

@@ -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 @@ err_dscp_init:
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);

1
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.h
View File

@@ -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 {