scsi: core: Prepare for using combined sense codes

In preparation for handling sense codes and their qualifers as a single
16-bit sense code field, with the values defined as macros in
include/scsi/scsi_sense.h, modify the definition of the structures
scsi_failure and scsi_sense_hdr to introduce a 16-bit sense_code field as a
union with the existing 8-bit asc and ascq fields.

This temporary modification allows accessing either the asc and ascq fields
individually, or their combination as the 16-bit sense_code field.

The helper functions scsi_sense_asc(), scsi_sense_ascq() are defined to
allow accessing the 8-bit ASC and ASCQ values from the sense_code filed of
struct scsi_sense_hdr. The helper functions scsi_failure_asc() and
scsi_failure_ascq() provide the same for the sense code field of struct
scsi_failure.

The helper functions scsi_set_sense_buffer() and scsi_set_sense() are also
added to wrap calls to scsi_build_sense_buffer() and scsi_build_sense()
using a 16-bit sense code argument instead of the 8-bit ASC and ASCQ
arguments.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Link: https://patch.msgid.link/20260908090308.1085097-6-dlemoal@kernel.org
Signed-off-by: Martin K. Petersen (Oracle) <mkp@kernel.org>

0 files changed, 0 insertions, 0 deletions