scsi_errmsg - man pages section 9: DDI and DKI Kernel Functions

Language:

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

The scsi_errmsg() function 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

The scsi_errmsg() function may be called from user, interrupt, or kernel 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

man pages section 9: DDI and DKI Kernel Functions