+ ret = task_get_notification(t);
+ if (ret < 0)
+ goto out;
+ ret = btr_node_status(btrn, 0, BTR_NT_ROOT);
+ if (ret <= 0)
+ goto out;
+ iovcnt = btr_pool_get_buffers(rn->btrp, iov);
+ ret = -E_UDP_OVERRUN;
+ if (iovcnt == 0)
+ goto out;
+ ret = readv_nonblock(rn->fd, iov, iovcnt, &s->rfds, &num_bytes);
+ if (num_bytes == 0)
+ goto out;
+ readv_ret = ret;
+ ret = udp_check_eof(num_bytes, iov);
+ if (ret < 0)
+ goto out;
+ if (iov[0].iov_len >= num_bytes)
+ btr_add_output_pool(rn->btrp, num_bytes, btrn);
+ else { /* both buffers contain data */
+ btr_add_output_pool(rn->btrp, iov[0].iov_len, btrn);
+ btr_add_output_pool(rn->btrp, num_bytes - iov[0].iov_len,
+ btrn);