ovl_should_sync
if (!error && ovl_should_sync(ofs) && datasync)
if (!err && ovl_should_sync(ofs) && c->metadata_fsync)
if (!ovl_should_sync(OVL_FS(inode->i_sb)))
if (ovl_should_sync(ofs)) {
if (!ovl_should_sync(ofs)) {
if (ovl_should_sync(ofs))