path: root/Documentation/nvme-connect-all.1

'\" t
.\"     Title: nvme-connect-all
.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 07/14/2022
.\"    Manual: NVMe Manual
.\"    Source: NVMe
.\"  Language: English
.\"
.TH "NVME\-CONNECT\-ALL" "1" "07/14/2022" "NVMe" "NVMe Manual"
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.SH "NAME"
nvme-connect-all \- Discover and Connect to Fabrics controllers\&.
.SH "SYNOPSIS"
.sp
.nf
\fInvme connect\-all\fR
                [\-\-transport=<trtype>     | \-t <trtype>]
                [\-\-nqn=<subnqn>           | \-n <subnqn>]
                [\-\-traddr=<traddr>        | \-a <traddr>]
                [\-\-trsvcid=<trsvcid>      | \-s <trsvcid>]
                [\-\-host\-traddr=<traddr>   | \-w <traddr>]
                [\-\-host\-iface=<iface>     | \-f <iface>]
                [\-\-hostnqn=<hostnqn>      | \-q <hostnqn>]
                [\-\-hostid=<hostid>        | \-I <hostid>]
                [\-\-raw=<filename>         | \-r <filename>]
                [\-\-cfg\-file=<cfg>         | \-C <cfg>]
                [\-\-keep\-alive\-tmo=<#>     | \-k <#>]
                [\-\-reconnect\-delay=<#>    | \-c <#>]
                [\-\-ctrl\-loss\-tmo=<#>      | \-l <#>]
                [\-\-hdr\-digest             | \-g]
                [\-\-data\-digest            | \-G]
                [\-\-nr\-io\-queues=<#>       | \-i <#>]
                [\-\-nr\-write\-queues=<#>    | \-W <#>]
                [\-\-nr\-poll\-queues=<#>     | \-P <#>]
                [\-\-queue\-size=<#>         | \-Q <#>]
                [\-\-persistent             | \-p]
                [\-\-quiet                  | \-S]
                [\-\-dump\-config            | \-O]
.fi
.SH "DESCRIPTION"
.sp
Send one or more Discovery requests to a NVMe over Fabrics Discovery Controller, and create controllers for the returned discovery records\&.
.sp
If no parameters are given, then \fInvme connect\-all\fR will attempt to find a /etc/nvme/discovery\&.conf file to use to supply a list of connect\-all commands to run\&. If no /etc/nvme/discovery\&.conf file exists, the command will quit with an error\&.
.sp
Otherwise a specific Discovery Controller should be specified using the \-\-transport, \-\-traddr and if necessary the \-\-trsvcid and a Discovery request will be sent to the specified Discovery Controller\&.
.sp
See the documentation for the nvme\-discover(1) command for further background\&.
.SH "OPTIONS"
.PP
\-t <trtype>, \-\-transport=<trtype>
.RS 4
This field specifies the network fabric being used for a NVMe\-over\-Fabrics network\&. Current string values include:
.TS
allbox tab(:);
lt lt
lt lt
lt lt
lt lt
lt lt.
T{
Value
T}:T{
Definition
T}
T{
rdma
T}:T{
The network fabric is an rdma network (RoCE, iWARP, Infiniband, basic rdma, etc)
T}
T{
fc
T}:T{
\fBWIP\fR
The network fabric is a Fibre Channel network\&.
T}
T{
tcp
T}:T{
The network fabric is a TCP/IP network\&.
T}
T{
loop
T}:T{
Connect to a NVMe over Fabrics target on the local host
T}
.TE
.sp 1
.RE
.PP
\-n <subnqn>, \-\-nqn <subnqn>
.RS 4
This field specifies the name for the NVMe subsystem to connect to\&.
.RE
.PP
\-a <traddr>, \-\-traddr=<traddr>
.RS 4
This field specifies the network address of the Discovery Controller\&. For transports using IP addressing (e\&.g\&. rdma) this should be an IP\-based address (ex\&. IPv4)\&.
.RE
.PP
\-s <trsvcid>, \-\-trsvcid=<trsvcid>
.RS 4
This field specifies the transport service id\&. For transports using IP addressing (e\&.g\&. rdma) this field is the port number\&. By default, the IP port number for the RDMA transport is 4420\&.
.RE
.PP
\-w <traddr>, \-\-host\-traddr=<traddr>
.RS 4
This field specifies the network address used on the host to connect to the Controller\&. For TCP, this sets the source address on the socket\&.
.RE
.PP
\-f <iface>, \-\-host\-iface=<iface>
.RS 4
This field specifies the network interface used on the host to connect to the Controller (e\&.g\&. IP eth1, enp2s0, enx78e7d1ea46da)\&. This forces the connection to be made on a specific interface instead of letting the system decide\&.
.RE
.PP
\-q <hostnqn>, \-\-hostnqn=<hostnqn>
.RS 4
Overrides the default Host NQN that identifies the NVMe Host\&. If this option is not specified, the default is read from /etc/nvme/hostnqn first\&. If that does not exist, the autogenerated NQN value from the NVMe Host kernel module is used next\&. The Host NQN uniquely identifies the NVMe Host, and may be used by the the Discovery Controller to control what NVMe Target resources are allocated to the NVMe Host for a connection\&.
.RE
.PP
\-I <hostid>, \-\-hostid=<hostid>
.RS 4
UUID(Universally Unique Identifier) to be discovered which should be formatted\&.
.RE
.PP
\-r <filename>, \-\-raw=<filename>
.RS 4
This field will take the output of the
\fInvme connect\-all\fR
command and dump it to a raw binary file\&. By default
\fInvme connect\-all\fR
will dump the output to stdout\&.
.RE
.PP
\-C <cfg>, \-\-config\-file=<cfg>
.RS 4
Use the specified JSON configuration file instead of the default /etc/nvme/config\&.json file or
\fInone\fR
to not read in an existing configuration file\&. The JSON configuration file format is documented in
\m[blue]\fBhttps://github\&.com/linux\-nvme/libnvme/doc/config\-schema\&.json\fR\m[]
.RE
.PP
\-k <#>, \-\-keep\-alive\-tmo=<#>
.RS 4
Overrides the default keep alive timeout (in seconds)\&. This option will be ignored for discovery, but will be passed on to the subsequent connect call\&.
.RE
.PP
\-c <#>, \-\-reconnect\-delay=<#>
.RS 4
Overrides the default delay (in seconds) before reconnect is attempted after a connect loss\&.
.RE
.PP
\-l <#>, \-\-ctrl\-loss\-tmo=<#>
.RS 4
Overrides the default controller loss timeout period (in seconds)\&.
.RE
.PP
\-g, \-\-hdr\-digest
.RS 4
Generates/verifies header digest (TCP)\&.
.RE
.PP
\-G, \-\-data\-digest
.RS 4
Generates/verifies data digest (TCP)\&.
.RE
.PP
\-i <#>, \-\-nr\-io\-queues=<#>
.RS 4
Overrides the default number of I/O queues create by the driver\&. This option will be ignored for discovery, but will be passed on to the subsequent connect call\&.
.RE
.PP
\-W <#>, \-\-nr\-write\-queues=<#>
.RS 4
Adds additional queues that will be used for write I/O\&.
.RE
.PP
\-P <#>, \-\-nr\-poll\-queues=<#>
.RS 4
Adds additional queues that will be used for polling latency sensitive I/O\&.
.RE
.PP
\-Q <#>, \-\-queue\-size=<#>
.RS 4
Overrides the default number of elements in the I/O queues created by the driver\&. This option will be ignored for discovery, but will be passed on to the subsequent connect call\&.
.RE
.PP
\-p, \-\-persistent
.RS 4
Don\(cqt remove the discovery controller after retrieving the discovery log page\&.
.RE
.PP
\-S, \-\-quiet
.RS 4
Suppress error messages\&.
.RE
.PP
\-O, \-\-dump\-config
.RS 4
Print out resulting JSON configuration file to stdout\&.
.RE
.SH "EXAMPLES"
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Connect to all records returned by the Discover Controller with IP4 address 192\&.168\&.1\&.3 for all resources allocated for NVMe Host name host1\-rogue\-nqn on the RDMA network\&. Port 4420 is used by default:
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme connect\-all \-\-transport=rdma \-\-traddr=192\&.168\&.1\&.3 \e
\-\-hostnqn=host1\-rogue\-nqn
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Issue a
\fInvme connect\-all\fR
command using a /etc/nvme/discovery\&.conf file:
.sp
.if n \{\
.RS 4
.\}
.nf
# Machine default \*(Aqnvme discover\*(Aq commands\&.  Query the
# Discovery Controller\*(Aqs two ports (some resources may only
# be accessible on a single port)\&.  Note an official
# nqn (Host) name defined in the NVMe specification is being used
# in this example\&.
\-t rdma \-a 192\&.168\&.69\&.33 \-s 4420 \-q nqn\&.2014\-08\&.com\&.example:nvme:nvm\-subsystem\-sn\-d78432
\-t rdma \-a 192\&.168\&.1\&.4   \-s 4420 \-q nqn\&.2014\-08\&.com\&.example:nvme:nvm\-subsystem\-sn\-d78432

At the prompt type "nvme connect\-all"\&.
.fi
.if n \{\
.RE
.\}
.RE
.SH "SEE ALSO"
.sp
nvme\-discover(1) nvme\-connect(1)
.SH "NVME"
.sp
Part of the nvme\-user suite