expr: add set_elem_expr as container for set element attributes

Add a new expression type "set_elem_expr" that is used as container for
the key in order to attach different attributes, such as timeout values,
to the key.

The expression hierarchy is as follows:

Sets:

    elem
     |
    key

Maps:

   mapping
   /      \
 elem    data
  |
 key

Signed-off-by: Patrick McHardy <kaber@trash.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/netlink_linearize.c b/src/netlink_linearize.c
index 9bef67b3..d1414c14 100644
--- a/src/netlink_linearize.c
+++ b/src/netlink_linearize.c
@@ -528,6 +528,8 @@ static void netlink_gen_expr(struct netlink_linearize_ctx *ctx,
 		return netlink_gen_meta(ctx, expr, dreg);
 	case EXPR_CT:
 		return netlink_gen_ct(ctx, expr, dreg);
+	case EXPR_SET_ELEM:
+		return netlink_gen_expr(ctx, expr->key, dreg);
 	default:
 		BUG("unknown expression type %s\n", expr->ops->name);
 	}