'\" t
.\"     Title: scsi_vpd_lun_id
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: SCSI mid layer
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "SCSI_VPD_LUN_ID" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "SCSI mid layer"
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.SH "NAME"
scsi_vpd_lun_id \- return a unique device identification
.SH "SYNOPSIS"
.HP \w'int\ scsi_vpd_lun_id('u
.BI "int scsi_vpd_lun_id(struct\ scsi_device\ *\ " "sdev" ", char\ *\ " "id" ", size_t\ " "id_len" ");"
.SH "ARGUMENTS"
.PP
\fIsdev\fR
.RS 4
SCSI device
.RE
.PP
\fIid\fR
.RS 4
buffer for the identification
.RE
.PP
\fIid_len\fR
.RS 4
length of the buffer
.RE
.SH "DESCRIPTION"
.PP
Copies a unique device identification into
\fIid\fR
based on the information in the VPD page 0x83 of the device\&. The string will be formatted as a SCSI name string\&.
.PP
Returns the length of the identification or error on failure\&. If the identifier is longer than the supplied buffer the actual identifier length is returned and the buffer is not zero\-padded\&.
.SH "AUTHORS"
.PP
\fBJames Bottomley\fR <\&James.Bottomley@hansenpartnership.com\&>
.RS 4
Author.
.RE
.PP
\fBRob Landley\fR <\&rob@landley.net\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br