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SubjectRe: [PATCH v2 3/3] scsi: blocking IO when host is set blocked
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On 3/28/23 9:34 AM, Ye Bin wrote:
> From: Ye Bin <yebin10@huawei.com>
>
> As previous patch introduce 'blocked' sysfs api to set 'host_blockio'.
> If 'host_blockio' is true will blocking IO.
>
> Signed-off-by: Ye Bin <yebin10@huawei.com>
> ---
> drivers/scsi/scsi_lib.c | 2 ++
> include/scsi/scsi_host.h | 5 +++++
> 2 files changed, 7 insertions(+)
>
> diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
> index b7c569a42aa4..20d618300a46 100644
> --- a/drivers/scsi/scsi_lib.c
> +++ b/drivers/scsi/scsi_lib.c
> @@ -1724,6 +1724,8 @@ static blk_status_t scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
> }
>
> ret = BLK_STS_RESOURCE;
> + if (unlikely(scsi_host_blocked(shost)))
> + goto out_put_budget;

You can just put this check in scsi_host_queue_ready with the
host_self_blocked check.

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