'\" t
.\"     Title: nvme-dir-send
.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 08/02/2024
.\"    Manual: NVMe Manual
.\"    Source: NVMe
.\"  Language: English
.\"
.TH "NVME\-DIR\-SEND" "1" "08/02/2024" "NVMe" "NVMe Manual"
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.SH "NAME"
nvme-dir-send \- Issue a directive send command, returns applicable results
.SH "SYNOPSIS"
.sp
.nf
\fInvme dir\-send\fR <device> [\-\-namespace\-id=<nsid> | \-n <nsid>]
                        [\-\-data\-len=<data\-len> | \-l <data\-len>]
                        [\-\-dir\-type=<dtype> | \-D <dtype>]
                        [\-\-dir\-spec=<dspec> | \-S <dspec>]
                        [\-\-dir\-oper=<doper> | \-O <doper>]
                        [\-\-endir=<endir> | \-e <endir>]
                        [\-\-target\-dir=<tdir> | \-T <tdir>]
                        [\-\-human\-readable | \-H] [\-\-raw\-binary | \-b]
                        [\-\-output\-format=<fmt> | \-o <fmt>] [\-\-verbose | \-v]
                        [\-\-timeout=<timeout> | \-t <timeout>]
.fi
.SH "DESCRIPTION"
.sp
Submits an NVMe Directive Send admin command and returns the applicable results\&. This may be the combination of directive type, and operation, as well as target directive and its enable/disable status of the operation, if specific operation needs it\&.
.sp
The <device> parameter is mandatory and may be either the NVMe character device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1)\&.
.sp
On success, the returned directive\(cqs parameter structure (if applicable) is returned in one of several ways depending on the option flags; the structure may parsed by the program and printed in a readable format if it is a known structure, displayed in hex, or the raw buffer may be printed to stdout for another program to parse\&.
.SH "OPTIONS"
.PP
\-n <nsid>, \-\-namespace\-id=<nsid>
.RS 4
Retrieve the feature for the given nsid\&. This is optional and most features do not use this value\&.
.RE
.PP
\-D <dtype>, \-\-dir\-type=<dtype>
.RS 4
Directive type
.RE
.PP
\-S <dspec>, \-\-dir\-spec=<dspec>
.RS 4
Directive specific
.RE
.PP
\-O <doper>, \-\-dir\-oper=<doper>
.RS 4
Directive operation
.RE
.PP
\-T <tdir>, \-\-target\-dir=<nsr>
.RS 4
Target directive of the operation
.RE
.PP
\-e <endir>, \-\-endir=<endir>
.RS 4
Target directive enable(1) or disable (0) operation
.TS
allbox tab(:);
lt lt
lt lt
lt lt
lt lt
lt lt
lt lt.
T{
Select
T}:T{
Description
T}
T{
0
T}:T{
Current
T}
T{
1
T}:T{
Default
T}
T{
2
T}:T{
Saved
T}
T{
3
T}:T{
Supported capabilities
T}
T{
4\(en7
T}:T{
Reserved
T}
.TE
.sp 1
.RE
.PP
\-l <data\-len>, \-\-data\-len=<data\-len>
.RS 4
The data length for the buffer returned for this feature\&. Most known features do not use this value\&. The exception is LBA Range Type
.RE
.PP
\-b, \-\-raw\-binary
.RS 4
Print the raw receive buffer to stdout if the command returns a structure\&.
.RE
.PP
\-H, \-\-human\-readable
.RS 4
Print the decoded receive buffer to stdout if the command returns a structure\&.
.RE
.PP
\-o <fmt>, \-\-output\-format=<fmt>
.RS 4
Set the reporting format to
\fInormal\fR,
\fIjson\fR
or
\fIbinary\fR\&. Only one output format can be used at a time\&.
.RE
.PP
\-v, \-\-verbose
.RS 4
Increase the information detail in the output\&.
.RE
.PP
\-t <timeout>, \-\-timeout=<timeout>
.RS 4
Override default timeout value\&. In milliseconds\&.
.RE
.SH "EXAMPLES"
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Enable streams directive :
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme dir\-send /dev/nvme0n1 \-\-dir\-type 0 \-\-dir\-oper 1 \-\-target\-dir 1 \-\-endir 1
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Disable streams directive :
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme dir\-send /dev/nvme0n1 \-\-dir\-type 0 \-\-dir\-oper 1 \-\-target\-dir 1 \-\-endir 0
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Release all allocated streams resource :
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme dir\-send /dev/nvme0n1 \-\-dir\-type 1 \-\-dir\-oper 2
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Release stream ID 3 :
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme dir\-send /dev/nvme0 \-\-dir\-type 1 \-\-dir\-oper 1 \-\-dir\-spec 3
.fi
.if n \{\
.RE
.\}
.sp
It is probably a bad idea to not redirect stdout when using this mode\&.
.RE
.SH "NVME"
.sp
Part of the nvme\-user suite