[PATCH net-next mlxsw] mlxsw: spectrum_flower: Disallow usage of vlan_id key on egress

[Nir Dotan]

As recent spectrum FW imposes a limitation on using vlan_id key for
egress ACL, disallow the usage of that key accordingly and return a
proper extack message.

Signed-off-by: Nir Dotan <nird at mellanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum.h        |  1 +
 drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c    | 11 +++++++++++
 drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c |  5 +++++
 3 files changed, 17 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index c99fc19..3ae9301 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -505,6 +505,7 @@ int mlxsw_sp_acl_block_unbind(struct mlxsw_sp *mlxsw_sp,
 			      struct mlxsw_sp_acl_block *block,
 			      struct mlxsw_sp_port *mlxsw_sp_port,
 			      bool ingress);
+bool mlxsw_sp_acl_block_is_egress_bound(struct mlxsw_sp_acl_block *block);
 struct mlxsw_sp_acl_ruleset *
 mlxsw_sp_acl_ruleset_lookup(struct mlxsw_sp *mlxsw_sp,
 			    struct mlxsw_sp_acl_block *block, u32 chain_index,
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
index 2658a51..c4f9238 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
@@ -127,6 +127,17 @@ bool mlxsw_sp_acl_block_disabled(struct mlxsw_sp_acl_block *block)
 	return block->disable_count;
 }
 
+bool mlxsw_sp_acl_block_is_egress_bound(struct mlxsw_sp_acl_block *block)
+{
+	struct mlxsw_sp_acl_block_binding *binding;
+
+	list_for_each_entry(binding, &block->binding_list, list) {
+		if (!binding->ingress)
+			return true;
+	}
+	return false;
+}
+
 static bool
 mlxsw_sp_acl_ruleset_is_singular(const struct mlxsw_sp_acl_ruleset *ruleset)
 {
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
index 04f14d4..09b9b91 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
@@ -347,6 +347,11 @@ static int mlxsw_sp_flower_parse(struct mlxsw_sp *mlxsw_sp,
 	}
 
 	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
+		if (mlxsw_sp_acl_block_is_egress_bound(block)) {
+			NL_SET_ERR_MSG_MOD(f->common.extack,
+					   "vlan_id key is not supported on egress");
+			return -EOPNOTSUPP;
+		}
 		struct flow_dissector_key_vlan *key =
 			skb_flow_dissector_target(f->dissector,
 						  FLOW_DISSECTOR_KEY_VLAN,
-- 
2.8.4