From 4fd003125f66a6c8ef6add934fac7cacdbbe509c Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Mon, 22 Jan 2018 09:17:40 +0100 Subject: [PATCH] mlxsw: spectrum_router: Use the nodes list as indication for empty FIB Currently, each FIB (IPv4 / IPv6) in a virtual router holds a prefix usage that is used to choose a matching LPM tree, but also to check if the FIB is empty, so that the LPM tree could be unbound. Next patches will remove the reliance on the per-FIB prefix usage for LPM tree matching. Keeping it only to check if the FIB is empty is a waste, since we can use the nodes ({Prefix, Length}) list instead. Signed-off-by: Ido Schimmel Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller --- .../net/ethernet/mellanox/mlxsw/spectrum_router.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c index 31891ae11c9b..634e427fb80e 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c @@ -349,14 +349,6 @@ mlxsw_sp_prefix_usage_eq(struct mlxsw_sp_prefix_usage *prefix_usage1, return !memcmp(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1)); } -static bool -mlxsw_sp_prefix_usage_none(struct mlxsw_sp_prefix_usage *prefix_usage) -{ - struct mlxsw_sp_prefix_usage prefix_usage_none = {{ 0 } }; - - return mlxsw_sp_prefix_usage_eq(prefix_usage, &prefix_usage_none); -} - static void mlxsw_sp_prefix_usage_cpy(struct mlxsw_sp_prefix_usage *prefix_usage1, struct mlxsw_sp_prefix_usage *prefix_usage2) @@ -4240,8 +4232,11 @@ static int mlxsw_sp_fib_lpm_tree_link(struct mlxsw_sp *mlxsw_sp, static void mlxsw_sp_fib_lpm_tree_unlink(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib *fib) { - if (!mlxsw_sp_prefix_usage_none(&fib->prefix_usage)) + if (!list_is_singular(&fib->node_list)) return; + /* Last node is being unlinked from the FIB. Unbind the + * tree and drop the reference. + */ mlxsw_sp_vr_lpm_tree_unbind(mlxsw_sp, fib); mlxsw_sp_lpm_tree_put(mlxsw_sp, fib->lpm_tree); fib->lpm_tree = NULL; -- 2.30.2