SCSI_ARQ_STATUS(9S)SCSI_ARQ_STATUS(9S)NAMEscsi_arq_status - SCSI auto request sense structure
SYNOPSIS
#include <sys/scsi/scsi.h>
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI)
DESCRIPTION
When auto request sense has been enabled using scsi_ifsetcap(9F) and
the "auto-rqsense" capability, the target driver must allocate a status
area in the SCSI packet structure for the auto request sense structure
(see scsi_pkt(9S)). In the event of a check condition, the transport
layer automatically executes a request sense command. This check
ensures that the request sense information does not get lost. The auto
request sense structure supplies the SCSI status of the original com‐
mand, the transport information pertaining to the request sense com‐
mand, and the request sense data.
STRUCTURE MEMBERS
struct scsi_status sts_status; /* SCSI status */
struct scsi_status sts_rqpkt_status; /* SCSI status of
request sense cmd */
uchar_t sts_rqpkt_reason; /* reason completion */
uchar_t sts_rqpkt_resid; /* residue */
uint_t sts_rqpkt_state; /* state of command */
uint_t sts_rqpkt_statistics;/* statistics */
struct scsi_extended_sense sts_sensedata; /* actual sense data */
sts_status is the SCSI status of the original command. If the status
indicates a check condition, the transport layer might have performed
an auto request sense command.
sts_rqpkt_status is the SCSI status of the request sense command.
sts_rqpkt_reason is the completion reason of the request sense command.
If the reason is not CMD_CMPLT, then the request sense command did not
complete normally.
sts_rqpkt_resid is the residual count of the data transfer and indi‐
cates the number of data bytes that have not been transferred. The auto
request sense command requests SENSE_LENGTH bytes.
sts_rqpkt_state has bit positions representing the five most important
statuses that a SCSI command can go obtain.
sts_rqpkt_statistics maintains transport-related statistics of the
request sense command.
sts_sensedata contains the actual sense data if the request sense com‐
mand completed normally.
SEE ALSOscsi_ifgetcap(9F), scsi_init_pkt(9F), scsi_extended_sense(9S),
scsi_pkt(9S)
Writing Device Drivers
Sep 30, 1996 SCSI_ARQ_STATUS(9S)
