On 01/04/2018 11:46 PM, Keith Busch wrote:
> This patch provides a common decoder for block status that may be retried
> so various entities wishing to consult this do not have to duplicate
> this decision.
>
> Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx>
> ---
> include/linux/blk_types.h | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
> index a1e628e032da..b6a8723b493c 100644
> --- a/include/linux/blk_types.h
> +++ b/include/linux/blk_types.h
> @@ -39,6 +39,22 @@ typedef u8 __bitwise blk_status_t;
>
> #define BLK_STS_AGAIN ((__force blk_status_t)12)
>
> +static inline bool blk_retryable(blk_status_t error)
> +{
> + switch (error) {
> + case BLK_STS_NOTSUPP:
> + case BLK_STS_NOSPC:
> + case BLK_STS_TARGET:
> + case BLK_STS_NEXUS:
> + case BLK_STS_MEDIUM:
> + case BLK_STS_PROTECTION:
> + return false;
> + }
> +
> + /* Anything else could be a path failure, so should be retried */
> + return true;
> +}
> +
> struct blk_issue_stat {
> u64 stat;
> };
>
Reviewed-by: Hannes Reinecke <hare@xxxxxxxx>
Cheers,
Hannes
--
Dr. Hannes Reinecke zSeries & Storage
hare@xxxxxxxx +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
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