Currently symlinks are not supported because only inodes having extent trees are supported. According to Ext4 Disk Layout for symlinks, if the symlink contains a path shorter than 60 bytes then inode.i_block (Inode.IBlock in this lib) is used to store the path (which is usually the case). When that happens, the inode is not using extents and hence InodeFlagExtents is not set. Hence, this library refuses to create the symlink's inode. (Reference)