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107 lines
3.1 KiB
Groff
107 lines
3.1 KiB
Groff
.\" Copyright (c) 2014 Andriy Gapon <avg@FreeBSD.org>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd September 15, 2014
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.Dt ZFSLOADER 8
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.Os
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.Sh NAME
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.Nm zfsloader
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.Nd kernel bootstrapping final stage
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.Sh DESCRIPTION
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.Nm
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is an extended variant of
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.Xr loader 8
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with added support for booting from ZFS.
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This document describes only differences from
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.Xr loader 8 .
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.Sh ZFS FEATURES
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.Nm
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supports the following format for specifying ZFS filesystems which
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can be used wherever
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.Xr loader 8
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refers to a device specification:
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.Pp
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.Ar zfs:pool/filesystem:
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.Pp
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where
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.Pa pool/filesystem
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is a ZFS filesystem name as described in
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.Xr zfs 8 .
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.Pp
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If
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.Pa /etc/fstab
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does not have an entry for the root filesystem and
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.Va vfs.root.mountfrom
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is not set, but
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.Va currdev
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refers to a ZFS filesystem, then
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.Nm
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will instruct kernel to use that filesystem as the root filesystem.
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.Sh ZFS COMMAND EXTENSIONS
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.Bl -tag -width Ds -compact
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.It Ic lsdev Op Fl v
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Lists ZFS pools in addition to disks and partitions.
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Adding
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.Fl v
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shows more ZFS pool details in a format that resembles
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.Nm zpool Cm status
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output.
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.Pp
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.It Ic lszfs Ar filesystem
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A ZFS extended command that can be used to explore the ZFS filesystem
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hierarchy in a pool.
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Lists the immediate children of the
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.Ar filesystem .
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The filesystem hierarchy is rooted at a filesystem with the same name
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as the pool.
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.El
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.Sh FILES
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.Bl -tag -width /boot/zfsloader -compact
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.It Pa /boot/zfsloader
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.Nm
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itself.
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.El
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.Sh EXAMPLES
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Set the default device used for loading a kernel from a ZFS filesystem:
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.Bd -literal -offset indent
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set currdev=zfs:tank/ROOT/knowngood:
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.Ed
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.Sh SEE ALSO
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.Xr gptzfsboot 8 ,
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.Xr loader 8 ,
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.Xr zfs 8 ,
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.Xr zfsboot 8 ,
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.Xr zfsloader 8 ,
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.Xr zpool 8
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.Sh HISTORY
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The
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.Nm
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first appeared in
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.Fx 7.3 .
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.Sh AUTHORS
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This manual page was written by
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.An Andriy Gapon Aq avg@FreeBSD.org .
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