On Fri, Sep 23, 2022 at 02:15:01PM +0800, ZiyangZhang wrote:
> With recovery feature enabled, in ublk_queue_rq or task work
> (in exit_task_work or fallback wq), we requeue rqs instead of
> ending(aborting) them. Besides, No matter recovery feature is enabled
> or disabled, we schedule monitor_work immediately.
>
> Signed-off-by: ZiyangZhang <ZiyangZhang@xxxxxxxxxxxxxxxxx>
> ---
> drivers/block/ublk_drv.c | 15 +++++++++++++--
> 1 file changed, 13 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
> index 05bfbaa49696..3ae13e46ece6 100644
> --- a/drivers/block/ublk_drv.c
> +++ b/drivers/block/ublk_drv.c
> @@ -655,6 +655,16 @@ static void ubq_complete_io_cmd(struct ublk_io *io, int res)
>
> #define UBLK_REQUEUE_DELAY_MS 3
>
> +static inline void __ublk_abort_rq(struct ublk_queue *ubq,
> + struct request *rq)
> +{
> + /* We cannot process this rq so just requeue it. */
> + if (ublk_queue_can_use_recovery(ubq))
> + blk_mq_requeue_request(rq, false);
> + else
> + blk_mq_end_request(rq, BLK_STS_IOERR);
> +}
> +
> static inline void __ublk_rq_task_work(struct request *req)
> {
> struct ublk_queue *ubq = req->mq_hctx->driver_data;
> @@ -677,7 +687,7 @@ static inline void __ublk_rq_task_work(struct request *req)
> * (2) current->flags & PF_EXITING.
> */
> if (unlikely(current != ubq->ubq_daemon || current->flags & PF_EXITING)) {
> - blk_mq_end_request(req, BLK_STS_IOERR);
> + __ublk_abort_rq(ubq, req);
> mod_delayed_work(system_wq, &ub->monitor_work, 0);
> return;
> }
> @@ -769,7 +779,8 @@ static blk_status_t ublk_queue_rq(struct blk_mq_hw_ctx *hctx,
> if (unlikely(ubq_daemon_is_dying(ubq))) {
> fail:
> mod_delayed_work(system_wq, &ubq->dev->monitor_work, 0);
> - return BLK_STS_IOERR;
> + __ublk_abort_rq(ubq, rq);
mod_delayed_work() can be put into __ublk_abort_rq() too, otherwise
looks fine:
Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx>
thanks,
Ming
