[PATCH nft 1/2] expression: don't trim off unary expression on delinearization

[Pablo Neira Ayuso <pablo@netfilter.org>]

This transformation introduces an unnecessary asymmetry between the
linearization and delinearization steps that prevent rule deletion from
definition to work fine.

Moreover, do not print htonl and ntonl from unary expression, this
syntax is not allowed by the parser.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 src/expression.c          | 3 ---
 src/netlink_delinearize.c | 5 +----
 2 files changed, 1 insertion(+), 7 deletions(-)

diff --git a/src/expression.c b/src/expression.c
index 5defa63f4a5f..55dd391178c3 100644
--- a/src/expression.c
+++ b/src/expression.c
@@ -460,10 +460,7 @@ const char *expr_op_symbols[] = {
 
 static void unary_expr_print(const struct expr *expr)
 {
-	if (expr_op_symbols[expr->op] != NULL)
-		printf("%s(", expr_op_symbols[expr->op]);
 	expr_print(expr->arg);
-	printf(")");
 }
 
 static void unary_expr_clone(struct expr *new, const struct expr *expr)
diff --git a/src/netlink_delinearize.c b/src/netlink_delinearize.c
index 49dc6a6016ba..b355eff47222 100644
--- a/src/netlink_delinearize.c
+++ b/src/netlink_delinearize.c
@@ -1759,10 +1759,7 @@ static void expr_postprocess(struct rule_pp_ctx *ctx, struct expr **exprp)
 	}
 	case EXPR_UNARY:
 		expr_postprocess(ctx, &expr->arg);
-		expr_set_type(expr->arg, expr->arg->dtype, !expr->arg->byteorder);
-
-		*exprp = expr_get(expr->arg);
-		expr_free(expr);
+		expr_set_type(expr, expr->arg->dtype, !expr->arg->byteorder);
 		break;
 	case EXPR_BINOP:
 		expr_postprocess(ctx, &expr->left);
-- 
2.1.4