'\" t
.\"     Title: proc_scsi_write
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: May 2018
.\"    Manual: SCSI mid layer
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "PROC_SCSI_WRITE" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "SCSI mid layer"
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.SH "NAME"
proc_scsi_write \- handle writes to /proc/scsi/scsi
.SH "SYNOPSIS"
.HP \w'ssize_t\ proc_scsi_write('u
.BI "ssize_t proc_scsi_write(struct\ file\ *\ " "file" ", const\ char\ __user\ *\ " "buf" ", size_t\ " "length" ", loff_t\ *\ " "ppos" ");"
.SH "ARGUMENTS"
.PP
\fIfile\fR
.RS 4
not used
.RE
.PP
\fIbuf\fR
.RS 4
buffer to write
.RE
.PP
\fIlength\fR
.RS 4
length of buf, at most PAGE_SIZE
.RE
.PP
\fIppos\fR
.RS 4
not used
.RE
.SH "DESCRIPTION"
.PP
this provides a legacy mechanism to add or remove devices by Host, Channel, ID, and Lun\&. To use,
\(lqecho \*(Aqscsi add\-single\-device 0 1 2 3\*(Aq > /proc/scsi/scsi\(rq
or
\(lqecho \*(Aqscsi remove\-single\-device 0 1 2 3\*(Aq > /proc/scsi/scsi\(rq
with
\(lq0 1 2 3\(rq
replaced by the Host, Channel, Id, and Lun\&.
.SH "NOTE"
.PP
this seems to be aimed at parallel SCSI\&. Most modern busses (USB, SATA, Firewire, Fibre Channel, etc) dynamically assign these values to provide a unique identifier and nothing more\&.
.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