mlxsw: acl: Use PBS type for forward action

Current behaviour of "mirred redirect" action (forward) offload is a bit
odd. For matched packets the action forwards them to the desired
destination, but it also lets the packet duplicates to go the original
way down (bridge, router, etc). That is more like "mirred mirror".
Fix this by using PBS type which behaves exactly like "mirred redirect".
Note that PBS does not support loopback mode.

Fixes: 4cda7d8d ("mlxsw: core: Introduce flexible actions support")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -651,17 +651,16 @@ int mlxsw_afa_block_append_fwd(struct mlxsw_afa_block *block,
 			       u8 local_port, bool in_port)
 {
 	struct mlxsw_afa_fwd_entry_ref *fwd_entry_ref;
-	u32 kvdl_index = 0;
+	u32 kvdl_index;
 	char *act;
 	int err;
 
-	if (!in_port) {
-		fwd_entry_ref = mlxsw_afa_fwd_entry_ref_create(block,
-							       local_port);
-		if (IS_ERR(fwd_entry_ref))
-			return PTR_ERR(fwd_entry_ref);
-		kvdl_index = fwd_entry_ref->fwd_entry->kvdl_index;
-	}
+	if (in_port)
+		return -EOPNOTSUPP;
+	fwd_entry_ref = mlxsw_afa_fwd_entry_ref_create(block, local_port);
+	if (IS_ERR(fwd_entry_ref))
+		return PTR_ERR(fwd_entry_ref);
+	kvdl_index = fwd_entry_ref->fwd_entry->kvdl_index;
 
 	act = mlxsw_afa_block_append_action(block, MLXSW_AFA_FORWARD_CODE,
 					    MLXSW_AFA_FORWARD_SIZE);
@@ -669,13 +668,12 @@ int mlxsw_afa_block_append_fwd(struct mlxsw_afa_block *block,
 		err = -ENOBUFS;
 		goto err_append_action;
 	}
-	mlxsw_afa_forward_pack(act, MLXSW_AFA_FORWARD_TYPE_OUTPUT,
+	mlxsw_afa_forward_pack(act, MLXSW_AFA_FORWARD_TYPE_PBS,
 			       kvdl_index, in_port);
 	return 0;
 
 err_append_action:
-	if (!in_port)
-		mlxsw_afa_fwd_entry_ref_destroy(block, fwd_entry_ref);
+	mlxsw_afa_fwd_entry_ref_destroy(block, fwd_entry_ref);
 	return err;
 }
 EXPORT_SYMBOL(mlxsw_afa_block_append_fwd);