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

NAME

       scsi_errmsg - display a SCSI request sense message

SYNOPSIS

       #include <sys/scsi/scsi.h>

       void  scsi_errmsg(struct  scsi_device  *devp, struct scsi_pkt *pktp, char *drv_name, int severity, daddr_t blkno, daddr_t err_blkno, struct
       scsi_key_strings *cmdlist, struct scsi_extended_sense *sensep);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI).

PARAMETERS

       devp	       Pointer to the  scsi_device(9S) structure.

       pktp	       Pointer to a scsi_pkt(9S) structure.

       drv_name        String used by  scsi_log(9F).

       severity        Error severity level, maps to severity strings below.

       blkno	       Requested block number.

       err_blkno       Error block number.

       cmdlist	       An array of SCSI command description strings.

       sensep	       A pointer to a  scsi_extended_sense(9S) structure.

DESCRIPTION

       scsi_errmsg() interprets the request sense information in the sensep pointer and generates a  standard  message	that  is  displayed  using
       scsi_log(9F).  The  first line of the message is always a CE_WARN, with the continuation lines being CE_CONT. sensep may be  NULL, in which
       case no sense key or vendor information is displayed.

       The driver should make the determination as to when to call this function based on the severity of the failure and the severity level  that
       the driver wants to report.

       The  scsi_device(9S) structure denoted by devp supplies the identification of the device that requested the display. severity selects which
       string is used in the "Error Level:" reporting, according to the following table:

       Severity Value:		     String:
       SCSI_ERR_ALL		     All
       SCSI_ERR_UNKNOWN 	     Unknown
       SCSI_ERR_INFO		     Informational

       SCSI_ERR_RECOVERE	     Recovered
       SCSI_ERR_RETRYABL	     Retryable
       SCSI_ERR_FATAL		     Fatal

       blkno is the block number of the original request that generated the error. err_blkno is the block number where the error occurred. cmdlist
       is a mapping table for translating the SCSI command code in pktp to the actual command string.

       The cmdlist is described in the structure below:

       struct scsi_key_strings {
	       int key;
	       char *message;
       };

       For a basic SCSI disk, the following list is appropriate:

       static struct scsi_key_strings scsi_cmds[] = {
	       0x00, "test unit ready",
	       0x01, "rezero/rewind",
	       0x03, "request sense",
	       0x04, "format",
	       0x07, "reassign",
	       0x08, "read",
	       0x0a, "write",
	       0x0b, "seek",
	       0x12, "inquiry",
	       0x15, "mode select",
	       0x16, "reserve",
	       0x17, "release",
	       0x18, "copy",
	       0x1a, "mode sense",
	       0x1b, "start/stop",
	       0x1e, "door lock",
	       0x28, "read(10)",
	       0x2a, "write(10)",
	       0x2f, "verify",
	       0x37, "read defect data",
	       0x3b, "write buffer",
	       -1, NULL
       };

CONTEXT

       scsi_errmsg() may be called from user or interrupt context.

EXAMPLES

       Example 1: Generating error information.

       This entry:

	  scsi_errmsg(devp, pkt, "sd", SCSI_ERR_INFO, bp->b_blkno,
		err_blkno, sd_cmds, rqsense);

       Generates:

       WARNING: /sbus@1,f8000000/esp@0,800000/sd@1,0 (sd1):
				  Error for Command: read	Error Level: Informational
				  Requested Block: 23936	Error Block: 23936
				  Vendor: QUANTUM		Serial Number: 123456
				  Sense Key:  Unit Attention
				  ASC: 0x29 (reset), ASCQ: 0x0, FRU: 0x0

SEE ALSO

       cmn_err(9F), scsi_log(9F), scsi_device(9S), scsi_extended_sense(9S), scsi_pkt(9S)

       Writing Device Drivers

SunOS 5.10							    8 Oct 1997							   scsi_errmsg(9F)