+ if (td->io_ops->flags & FIO_SYNCIO)
+ return FIO_Q_COMPLETED;
+
+ nd->io_us[nd->queued++] = io_u;
+ return FIO_Q_QUEUED;
+}
+
+static int fio_null_setup(struct thread_data *td)
+{
+ struct fio_file *f;
+ unsigned int i;
+
+ if (!td->o.size) {
+ log_err("fio: need size= set\n");
+ return 1;
+ }
+
+ td->io_size = td->o.size;
+ td->total_io_size = td->io_size;
+
+ for_each_file(td, f, i) {
+ f->real_file_size = td->total_io_size / td->o.nr_files;
+ f->file_size = f->real_file_size;
+ }
+
+ return 0;
+}
+
+static int fio_null_open(struct thread_data fio_unused *td,
+ struct fio_file fio_unused *f)
+{
+ f->fd = 0;