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scsi_arq_status

scsi_arq_status(9S)					    Data Structures for Drivers 				       scsi_arq_status(9S)

NAME

       scsi_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 sta-
       tus 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 command, the transport  information  pertaining  to  the  request
       sense command, 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 indicates 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 command completed normally.

SEE ALSO

       scsi_ifgetcap(9F), scsi_init_pkt(9F), scsi_extended_sense(9S), scsi_pkt(9S)

       Writing Device Drivers

SunOS 5.10							    30 Sep 1996 					       scsi_arq_status(9S)