Differential D25512 Diff 77280 head/sbin/zfsbootcfg/zfsbootcfg.8

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	.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY			.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF			.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	.\" SUCH DAMAGE.			.\" SUCH DAMAGE.
	.\"			.\"
	.\" $FreeBSD$			.\" $FreeBSD$
	.\"			.\"
	.Dd May 24, 2017			.Dd July 22, 2020
	.Dt ZFSBOOTCFG 8			.Dt ZFSBOOTCFG 8
	.Os			.Os
	.Sh NAME			.Sh NAME
	.Nm zfsbootcfg			.Nm zfsbootcfg
	.Nd "specify zfsboot options for the next boot"			.Nd "specify zfsboot options for the next boot"
	.Sh SYNOPSIS			.Sh SYNOPSIS
	.Nm			.Nm
	.Ao Ar options Ac			.Ao Ar options Ac
				.Nm
				.Op Fl n Ar name
				.Op Fl k Ar key
				.Op Fl p
				.Op Fl t Ar type
				.Op Fl v Ar value
				.Op Fl z Ar pool
				.Nm
	.Sh DESCRIPTION			.Sh DESCRIPTION
	.Nm			.Nm
	is used to set			is used to set
	.Xr boot.config 5 Ns -style			.Xr boot.config 5 Ns -style
	options to be used by			options to be used by
	.Xr zfsboot 8			.Xr zfsboot 8 ,
	or
	.Xr gptzfsboot 8			.Xr gptzfsboot 8
				or
				.Xr loader 8
	the next time the machine is booted.			the next time the machine is booted.
	Once			Once
	.Xr zfsboot 8			.Xr zfsboot 8
	or			or
	.Xr gptzfsboot 8			.Xr gptzfsboot 8
				or
				.Xr loader 8
	reads the information, it is deleted.			reads the information, it is deleted.
	If booting fails, the machine automatically reverts to the previous			If booting fails, the machine automatically reverts to the previous
	boot configuration.			boot configuration.
	The information is stored in a special reserved area of a ZFS pool.			The information is stored in a special boot environment area of a ZFS pool.
	.Xr zfsboot 8			.Pp
	or			If used without arguments,
	.Xr gptzfsboot 8			.Nm
	read the boot option information from the first disk found in the first			will output the current boot configuration, if set.
	ZFS pool found.			.Pp
				The following options are supported by
				.Nm :
				.Bl -tag -width indent
				.It Fl k Ar key
				Define key for
				.Ao key , value Ac
				pair.
				.It Fl n Ar name
				Update nvlist
				.Ar name .
				.It Fl p
				Print all information stored in ZFS pool bootenv area.
				.It Fl t Ar type
				Set type of
				.Ar value
				used in
				.Ao key , value Ac
				pair.
				Currently supported types are:
				.Bl -tag -width indent -compact
				.It Ar DATA_TYPE_BYTE
				.It Ar DATA_TYPE_INT8
				.It Ar DATA_TYPE_UINT8
				.It Ar DATA_TYPE_INT16
				.It Ar DATA_TYPE_UINT16
				.It Ar DATA_TYPE_INT32
				.It Ar DATA_TYPE_UINT32
				.It Ar DATA_TYPE_INT64
				.It Ar DATA_TYPE_UINT64
				.It Ar DATA_TYPE_BOOLEAN_VALUE
				.It Ar DATA_TYPE_STRING
				.El
				.Pp
				If not specified, the default is
				.Ar DATA_TYPE_STRING .
				.It Fl v Ar value
				Define value for
				.Ao key , value Ac
				pair.
				.It Fl z Ar pool
				Operate on
				.Ar pool .
				.El
	.Sh ENVIRONMENT			.Sh ENVIRONMENT
	.Bl -tag -width vfs.zfs.boot.primary_pool -compact			.Bl -tag -width vfs.root.mountfrom -compact
	.It Ev vfs.zfs.boot.primary_pool			.It Ev vfs.root.mountfrom
	The			The
	.Xr kenv 1			.Xr kenv 1
	variable that identifies a pool for which the options are written.			variable that identifies a pool for which the options are written.
	.It Ev vfs.zfs.boot.primary_vdev
	The
	.Xr kenv 1
	variable that identifies a disk within the pool where the options
	are written.
	.El			.El
	.Sh EXAMPLES			.Sh EXAMPLES
	Try to boot to a new			Try to boot to a new
	.Em boot environment			.Em boot environment
	without changing the			without changing the
	.Cm bootfs			.Cm bootfs
	property of a pool:			property of a pool:
	.Pp			.Pp
	.Dl "zfsbootcfg ""zfs:tank/ROOT/newbe:""			.Dl "zfsbootcfg ""zfs:tank/ROOT/newbe:""
	.Pp			.Pp
	To clear the boot options:			To clear the boot options:
	.Pp			.Pp
	.Dl "zfsbootcfg """"			.Dl "zfsbootcfg """"
	.Sh SEE ALSO			.Sh SEE ALSO
	.Xr boot.config 5 ,			.Xr boot.config 5 ,
				.Xr bectl 8 ,
	.Xr gptzfsboot 8 ,			.Xr gptzfsboot 8 ,
				.Xr loader 8 ,
	.Xr zfsboot 8			.Xr zfsboot 8
	.Sh HISTORY			.Sh HISTORY
	.Nm			.Nm
	appeared in			appeared in
	.Fx 11.1 .			.Fx 11.1 .
	.Sh AUTHORS			.Sh AUTHORS
	This manual page was written by			This manual page was written by
	.An Andriy Gapon Aq Mt avg@FreeBSD.org .			.An Andriy Gapon Aq Mt avg@FreeBSD.org .
	.Sh CAVEATS
	At the moment,
	.Nm
	uses the
	.Ev vfs.zfs.boot.primary_pool
	and
	.Ev vfs.zfs.boot.primary_vdev
	.Xr kenv 1
	variables to determine a ZFS pool and a disk in it where the options
	are to be stored.
	The variables are set by the ZFS boot chain, so there is an assumption
	that the same boot disk is going to be used for the next reboot.
	There is no
	.Nm
	option to specify a different pool or a different disk.
	.Pp
	.Nm
	should be extended to install new
	.Xr zfsboot 8
	blocks in a ZFS pool.