+/* hardlink.c */
+
+struct link_group_table *new_link_group_table(u64 capacity);
+int link_group_table_insert(struct dentry *dentry,
+ struct link_group_table *table);
+void free_link_group_table(struct link_group_table *table);
+u64 assign_link_groups(struct link_group_table *table);
+