SYSTEMD-STORAGETM.SERVICE(8)			     systemd-storagetm.service

NAME
       systemd-storagetm.service, systemd-storagetm - Exposes all local block
       devices as NVMe-TCP mass storage devices

SYNOPSIS
       systemd-storagetm.service

       /usr/lib/systemd/systemd-storagetm [OPTIONS...] [DEVICE]

DESCRIPTION
       systemd-storagetm.service is a service that exposes all local block
       devices as NVMe-TCP mass storage devices. Its primary use-case is to be
       invoked by the storage-target-mode.target unit that can be booted into.

	   Warning

	   The NVMe disks are currently exposed without authentication or
	   encryption, in read/write mode. This means network peers may read
	   from and write to the device without any restrictions. This
	   functionality should hence only be used in a local setup.

       Note that to function properly networking must be configured too. The
       recommended mechanism to boot into a storage target mode is by adding
       "rd.systemd.unit=storage-target-mode.target ip=link-local" on the
       kernel command line. Note that "ip=link-local" only configures
       link-local IP, i.e. IPv4LL and IPv6LL, which means non-routable
       addresses. This is done for security reasons, so that only systems on
       the local link can access the devices. Use "ip=dhcp" to assign routable
       addresses too. For further details see systemd-network-
       generator.service(8).

       Unless the --all switch is used expects one or more block devices or
       regular files to expose via NVMe-TCP as argument.

OPTIONS
       The following options are understood:

       --nqn=
	   Takes a string. If specified configures the NVMe Qualified Name to
	   use for the exposed NVMe-TCP mass storage devices. The NQN should
	   follow the syntax described in NVM Express Base Specification
	   2.0c[1], section 4.5 "NVMe Qualified Names". Note that the NQN
	   specified here will be suffixed with a dot and the block device
	   name before it is exposed on the NVMe target. If not specified,
	   defaults to "nqn.2023-10.io.systemd:storagetm.ID", where ID is
	   replaced by a 128bit ID derived from machine-id(5).

	   Added in version 255.

       --all, -a
	   If specified exposes all local block devices via NVMe-TCP, current
	   and future (i.e. it watches block devices come and go and updates
	   the NVMe-TCP list as needed). Note that by default any block
	   devices that originate on the same block device as the block device
	   backing the current root file system are excluded. If the switch is
	   specified twice this safety mechanism is disabled.

	   Added in version 255.

       --list-devices
	   Show a list of candidate block devices this command may operate on.
	   Specifically, this enumerates block devices currently present, and
	   shows their device node paths along with any of their symlinks.

	   Added in version 257.

       -h, --help
	   Print a short help text and exit.

       --version
	   Print a short version string and exit.

SEE ALSO
       systemd(1), systemd.special(7)

NOTES
	1. NVM Express Base Specification 2.0c
	   https://nvmexpress.org/wp-content/uploads/NVM-Express-Base-
	   Specification-2.0c-2022.10.04-Ratified.pdf

systemd 258					  SYSTEMD-STORAGETM.SERVICE(8)