- entry = rb_entry(node, struct extent_map, rb_node);
- entry->in_tree = 1;
- rb_link_node(node, parent, p);
- rb_insert_color(node, root);
- return NULL;
+ orig_parent = parent;
+ while (parent && em->start >= extent_map_end(entry)) {
+ parent = rb_next(parent);
+ entry = rb_entry(parent, struct extent_map, rb_node);
+ }
+ if (parent)
+ if (end > entry->start && em->start < extent_map_end(entry))
+ return -EEXIST;
+
+ parent = orig_parent;
+ entry = rb_entry(parent, struct extent_map, rb_node);
+ while (parent && em->start < entry->start) {
+ parent = rb_prev(parent);
+ entry = rb_entry(parent, struct extent_map, rb_node);
+ }
+ if (parent)
+ if (end > entry->start && em->start < extent_map_end(entry))
+ return -EEXIST;
+
+ em->in_tree = 1;
+ rb_link_node(&em->rb_node, orig_parent, p);
+ rb_insert_color(&em->rb_node, root);
+ return 0;