nvme-cli/Documentation/nvme-connect-all.txt

nvme-connect-all(1)
===================

NAME
----
nvme-connect-all - Discover and Connect to Fabrics controllers.

SYNOPSIS
--------
[verse]
'nvme connect-all'
		[--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]

DESCRIPTION
-----------
Send one or more Discovery requests to a NVMe over Fabrics Discovery
Controller, and create controllers for the returned discovery records.

If no parameters are given, then 'nvme connect-all' will attempt to
find a @SYSCONFDIR@/nvme/discovery.conf file to use to supply a list of
connect-all commands to run. If no @SYSCONFDIR@/nvme/discovery.conf file
exists, the command will quit with an error.

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.

See the documentation for the nvme-discover(1) command for further
background.

OPTIONS
-------
-t <trtype>::
--transport=<trtype>::
	This field specifies the network fabric being used for
	a NVMe-over-Fabrics network.  Current string values include:
+
[]
|=================
|Value|Definition
|rdma|The network fabric is an rdma network (RoCE, iWARP, Infiniband, basic rdma, etc)
|fc  |*WIP* The network fabric is a Fibre Channel network.
|tcp |The network fabric is a TCP/IP network.
|loop|Connect to a NVMe over Fabrics target on the local host
|=================

-n <subnqn>::
--nqn <subnqn>::
	This field specifies the name for the NVMe subsystem to connect to.

-a <traddr>::
--traddr=<traddr>::
	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).

-s <trsvcid>::
--trsvcid=<trsvcid>::
	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.

-w <traddr>::
--host-traddr=<traddr>::
	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.

-f <iface>::
--host-iface=<iface>::
	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.

-q <hostnqn>::
--hostnqn=<hostnqn>::
	Overrides the default Host NQN that identifies the NVMe Host.
	If this option is not specified, the default is read from
	@SYSCONFDIR@/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.

-I <hostid>::
--hostid=<hostid>::
	UUID(Universally Unique Identifier) to be discovered which should be
	formatted.

-r <filename>::
--raw=<filename>::
	This field will take the output of the 'nvme connect-all' command
	and dump it to a raw binary file. By default 'nvme connect-all' will
	dump the output to stdout.

-C <cfg>::
--config-file=<cfg>::
	Use the specified JSON configuration file instead of the
	default @SYSCONFDIR@/nvme/config.json file or 'none' to not read in
	an existing configuration file. The JSON configuration file
	format is documented in
	https://github.com/linux-nvme/libnvme/doc/config-schema.json

-k <#>::
--keep-alive-tmo=<#>::
	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.

-c <#>::
--reconnect-delay=<#>::
	Overrides the default delay (in seconds) before reconnect is attempted
	after a connect loss.

-l <#>::
--ctrl-loss-tmo=<#>::
	Overrides the default controller loss timeout period (in seconds).

-g::
--hdr-digest::
	Generates/verifies header digest (TCP).

-G::
--data-digest::
	Generates/verifies data digest (TCP).

-i <#>::
--nr-io-queues=<#>::
	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.

-W <#>::
--nr-write-queues=<#>::
	Adds additional queues that will be used for write I/O.

-P <#>::
--nr-poll-queues=<#>::
	Adds additional queues that will be used for polling latency sensitive I/O.

-Q <#>::
--queue-size=<#>::
	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.

-p::
--persistent::
	Don't remove the discovery controller after retrieving the discovery
	log page.

-S::
--quiet::
	Suppress error messages.

-O::
--dump-config::
	Print out resulting JSON configuration file to stdout.


EXAMPLES
--------
* 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:
+
------------
# nvme connect-all --transport=rdma --traddr=192.168.1.3 \
--hostnqn=host1-rogue-nqn
------------
+
* Issue a 'nvme connect-all' command using a @SYSCONFDIR@/nvme/discovery.conf file:
+
-----------
# Machine default 'nvme discover' commands.  Query the
# Discovery Controller's 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".

------------

SEE ALSO
--------
nvme-discover(1)
nvme-connect(1)

NVME
----
Part of the nvme-user suite