add a new vlist flag for avoiding automatic delete of entries

2 files changed, 4 insertions, 2 deletions

diff --git a/utils.c b/utils.c
index cc22290..31a5967 100644
--- a/utils.c
+++ b/utils.c
@@ -21,7 +21,8 @@ __vlist_init(struct vlist_tree *tree, avl_tree_comp cmp,
 void
 vlist_delete(struct vlist_tree *tree, struct vlist_node *node)
 {
-	avl_delete(&tree->avl, &node->avl);
+	if (!tree->no_delete)
+		avl_delete(&tree->avl, &node->avl);
 	tree->update(tree, NULL, node);
 }
 
@@ -37,7 +38,7 @@ vlist_add(struct vlist_tree *tree, struct vlist_node *node)
 
 	anode = avl_find(&tree->avl, key);
 	if (anode) {
-		if (tree->keep_old)
+		if (tree->keep_old || !tree->no_delete)
 			goto update_only;
 
 		old_node = container_of(anode, struct vlist_node, avl);
diff --git a/utils.h b/utils.h
index d71a8f7..8ef968a 100644
--- a/utils.h
+++ b/utils.h
@@ -29,6 +29,7 @@ struct vlist_tree {
 	vlist_update_cb update;
 	int key_offset;
 	bool keep_old;
+	bool no_delete;
 
 	int version;
 };