On 2022/5/17 13:53, Ming Lei wrote:
> +
> +static void ubd_cancel_queue(struct ubd_queue *ubq)
> +{
> + int i;
> +
> + for (i = 0; i < ubq->q_depth; i++) {
> + struct ubd_io *io = &ubq->ios[i];
> +
> + if (io->flags & UBD_IO_FLAG_ACTIVE) {
> + io->flags &= ~UBD_IO_FLAG_ACTIVE;
> + io_uring_cmd_done(io->cmd, UBD_IO_RES_ABORT, 0);
> + }
> + }
> +}
Hi Ming,
When ubdsrv sends STOP_DEV and all active IOs in ubd_drv are done(UBD_IO_RES_ABORT),
there may be still some IOs handled by ubdsrv(UBD_IO_FLAG_ACTIVE not set).
When these IOs complete and return to ubd_drv, how to handle them?
I find that UBD_IO_FETCH_REQ are still set,
so will these IOs be issued to ubdsrv again or canceled?
(I see ubd_drv fails IOs when the daemon is dying
but maybe here the daemon is still alive)
> +
> +/* Cancel all pending commands, must be called after del_gendisk() returns */
> +static void ubd_cancel_dev(struct ubd_device *ub)
> +{
> + int i;
> +
> + for (i = 0; i < ub->dev_info.nr_hw_queues; i++)
> + ubd_cancel_queue(ubd_get_queue(ub, i));
> +}
> +
> +static void ubd_stop_dev(struct ubd_device *ub)
> +{
> + mutex_lock(&ub->mutex);
> + if (!disk_live(ub->ub_disk))
> + goto unlock;
> +
> + del_gendisk(ub->ub_disk);
> + ub->dev_info.state = UBD_S_DEV_DEAD;
> + ub->dev_info.ubdsrv_pid = -1;
> + ubd_cancel_dev(ub);
> + unlock:
> + mutex_unlock(&ub->mutex);
> + cancel_delayed_work_sync(&ub->monitor_work);
> +}
> +
> +static int ubd_ctrl_stop_dev(struct ubd_device *ub)
> +{
> + ubd_stop_dev(ub);
> + return 0;
> +}
> +
