297 		if (file->f_op->llseek)  in vfs_llseek()
298 			fn = file->f_op->llseek;  in vfs_llseek()
424 	if (file->f_op->read)  in __vfs_read()
425 		return file->f_op->read(file, buf, count, pos);  in __vfs_read()
426 	else if (file->f_op->read_iter)  in __vfs_read()
493 	if (file->f_op->write)  in __vfs_write()
494 		return file->f_op->write(file, p, count, pos);  in __vfs_write()
495 	else if (file->f_op->write_iter)  in __vfs_write()
714 			nr = filp->f_op->read(filp, iovec.iov_base,  in do_loop_readv_writev()
717 			nr = filp->f_op->write(filp, iovec.iov_base,  in do_loop_readv_writev()
932 	if (file->f_op->read_iter)  in do_iter_read()
945 	if (!file->f_op->read_iter)  in vfs_iter_read()
969 	if (file->f_op->write_iter)  in do_iter_write()
981 	if (!file->f_op->write_iter)  in vfs_iter_write()
1610 	if (file_out->f_op->copy_file_range &&  in do_copy_file_range()
1611 	    file_out->f_op->copy_file_range == file_in->f_op->copy_file_range)  in do_copy_file_range()
1612 		return file_out->f_op->copy_file_range(file_in, pos_in,  in do_copy_file_range()
1656 	if (file_in->f_op->remap_file_range &&  in vfs_copy_file_range()
1660 		cloned = file_in->f_op->remap_file_range(file_in, pos_in,  in vfs_copy_file_range()
2049 	if (!file_in->f_op->remap_file_range)  in do_clone_file_range()
2060 	ret = file_in->f_op->remap_file_range(file_in, pos_in,  in do_clone_file_range()
2130 	if (!dst_file->f_op->remap_file_range)  in vfs_dedupe_file_range_one()
2138 	ret = dst_file->f_op->remap_file_range(src_file, src_pos, dst_file,  in vfs_dedupe_file_range_one()
2173 	if (!file->f_op->remap_file_range)  in vfs_dedupe_file_range()