scsi_validate_sense(9f) [opensolaris man page]

scsi_validate_sense(9F) 				   Kernel Functions for Drivers 				   scsi_validate_sense(9F)

NAME

       scsi_validate_sense - find descriptor in SCSI sense data

SYNOPSIS

       #include <sys/scsi/scsi.h>

       int scsi_validate_sense(uint8_t *sense_buffer, int sense_buf_len,
	    int *flags);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI).

PARAMETERS

       sense_buffer	Pointer to a buffer containing SCSI sense data. The sense data is expected in wire format starting at the response code.

       sense_buf_len	Length of sense buffer in bytes.

       flags		Returns additional properties of the sense data.

DESCRIPTION

       The  scsi_validate_sense() function returns the format of the sense data contained in the provided sense buffer. If the response code field
       in the sense data is not recognized or if there is not enough sense data to include sense key, asc,  and  ascq  then  scsi_validate_sense()
       returns	SENSE_UNUSABLE.  If  the buffer contains usable sense data in fixed format, the function returns SENSE_FIXED_FORMAT. If the buffer
       contains usable sense data in descriptor format, the function returns SENSE_DESCR_FORMAT.

       The following flags may be set as appropriate depending on the sense data:

       SNS_BUF_OVERFLOW    The sense data buffer provided for the request is too small to hold all the sense data.

       SNS_BUF_DEFERRED    The sense data contained in the buffer relates to an error that has occurred during the processing  of  a  successfully
			   completed command, such as a cached write that could not be commited to the media.

RETURN VALUES

       SENSE_UNUSABLE	     The response code from the sense data is unrecognized or not enough sense data present to provide the sense key, asc,
			     and ascq.

       SENSE_FIXED_FORMAT    The sense data in the buffer is in "fixed format".

       SENSE_DESCR_FORMAT    The sense data in the buffer is in "descriptor format".

CONTEXT

       The scsi_validate_sense() function can be called from user or interrupt context.

SEE ALSO

       scsi_ext_sense_fields(9F),   scsi_find_sense_descr(9F),	 scsi_sense_asc(9F),	scsi_sense_ascq(9F),	scsi_sense_cmdspecific_uint64(9F),
       scsi_sense_info_uint64(9F), scsi_sense_key(9F)

SunOS 5.11							    29 Jun 2006 					   scsi_validate_sense(9F)

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 5.11							    30 Sep 1996 					       scsi_arq_status(9S)