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scsi_status - SCSI status structure

#include <sys/scsi/scsi.h>

illumos DDI specific (illumos DDI) The SCSI-2standard defines a status byte that is normally sent by the target to the initiator during the status phase at the completion of each command.

uchar sts_scsi2 :1; /* SCSI-2 modifier bit */
uchar sts_is :1; /* intermediate status sent */
uchar sts_busy :1; /* device busy or reserved */
uchar sts_cm :1; /* condition met */
ucha sts_chk :1; /* check condition */

sts_chk indicates that a contingent allegiance condition has occurred.

sts_cm is returned whenever the requested operation is satisfied

sts_busy indicates that the target is busy. This status is returned whenever a target is unable to accept a command from an otherwise acceptable initiator (that is, no reservation conflicts). The recommended initiator recovery action is to issue the command again later.

sts_is is returned for every successfully completed command in a series of linked commands (except the last command), unless the command is terminated with a check condition status, reservation conflict, or command terminated status. Note that host bus adapter drivers may not support linked commands (see scsi_ifsetcap(9F)). If sts_is and sts_busy are both set, then a reservation conflict has occurred.

sts_scsi2 is the SCSI-2 modifier bit. If sts_scsi2 and sts_chk are both set, this indicates a command terminated status. If sts_scsi2 and sts_busy are both set, this indicates that the command queue in the target is full.

For accessing the status as a byte, the following values are appropriate: STATUS_GOOD

STATUS_CHECK STATUS_MET STATUS_BUSY STATUS_INTERMEDIATE STATUS_SCSI2 STATUS_INTERMEDIATE_MET STATUS_RESERVATION_CONFLICT STATUS_TERMINATED STATUS_QFULL scsi_ifgetcap (9F), scsi_init_pkt (9F), scsi_extended_sense (9S), scsi_pkt (9S)

Writing Device Drivers