size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset, ram_addr_t offset, size_t size, int *bytes_sent) { if (f->ops->save_page) { int ret = f->ops->save_page(f, f->opaque, block_offset, offset, size, bytes_sent); if (ret != RAM_SAVE_CONTROL_DELAYED) { if (*bytes_sent > 0) { qemu_update_position(f, *bytes_sent); } else if (ret < 0) { qemu_file_set_error(f, ret); } } return ret; } return RAM_SAVE_CONTROL_NOT_SUPP; }