On Tue, Jun 08, 2021 at 11:39:15PM -0400, Martin K. Petersen wrote:
> We are about to remove the request pointer from struct scsi_cmnd and
> that will complicate getting to the ref_tag via t10_pi_ref_tag() in
> the various drivers. Introduce a helper function to retrieve the
> reference tag so drivers will not have to worry about the details.
>
> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
> ---
> include/scsi/scsi_cmnd.h | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
> index 779a59fe8676..301b9cd4ddd0 100644
> --- a/include/scsi/scsi_cmnd.h
> +++ b/include/scsi/scsi_cmnd.h
> @@ -287,6 +287,13 @@ static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd)
> return blk_rq_pos(scmd->request);
> }
>
> +static inline u32 scsi_prot_ref_tag(struct scsi_cmnd *scmd)
> +{
> + struct request *rq = blk_mq_rq_from_pdu(scmd);
> +
> + return t10_pi_ref_tag(rq);
> +}
> +
> static inline unsigned int scsi_prot_interval(struct scsi_cmnd *scmd)
> {
> return scmd->device->sector_size;
Reviewed-by: Benjamin Block <bblock@xxxxxxxxxxxxx>
--
Best Regards, Benjamin Block / Linux on IBM Z Kernel Development / IBM Systems
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