297 		if (file->f_op->llseek)  in vfs_llseek()
298 			fn = file->f_op->llseek;  in vfs_llseek()
415 	if (file->f_op->read)  in __vfs_read()
416 		return file->f_op->read(file, buf, count, pos);  in __vfs_read()
417 	else if (file->f_op->read_iter)  in __vfs_read()
484 	if (file->f_op->write)  in __vfs_write()
485 		return file->f_op->write(file, p, count, pos);  in __vfs_write()
486 	else if (file->f_op->write_iter)  in __vfs_write()
700 			nr = filp->f_op->read(filp, iovec.iov_base,  in do_loop_readv_writev()
703 			nr = filp->f_op->write(filp, iovec.iov_base,  in do_loop_readv_writev()
921 	if (file->f_op->read_iter)  in do_iter_read()
934 	if (!file->f_op->read_iter)  in vfs_iter_read()
958 	if (file->f_op->write_iter)  in do_iter_write()
970 	if (!file->f_op->write_iter)  in vfs_iter_write()
1591 	if (file_in->f_op->clone_file_range) {  in vfs_copy_file_range()
1592 		ret = file_in->f_op->clone_file_range(file_in, pos_in,  in vfs_copy_file_range()
1600 	if (file_out->f_op->copy_file_range) {  in vfs_copy_file_range()
1601 		ret = file_out->f_op->copy_file_range(file_in, pos_in, file_out,  in vfs_copy_file_range()
1846 	if (!file_in->f_op->clone_file_range)  in do_clone_file_range()
1860 	ret = file_in->f_op->clone_file_range(file_in, pos_in,  in do_clone_file_range()
2006 	if (!dst_file->f_op->dedupe_file_range)  in vfs_dedupe_file_range_one()
2009 	ret = dst_file->f_op->dedupe_file_range(src_file, src_pos,  in vfs_dedupe_file_range_one()