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.\" $OpenBSD: mount_vnd.8,v 1.2 2007/04/14 13:17:24 jmc Exp $
.\"
.\" Copyright (c) 2007 Alexander von Gernler <grunk@openbsd.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd April 11, 2007
.Dt MOUNT_VND 8
.Os
.Sh NAME
.Nm mount_vnd
.Nd configure a vnd image
.Sh SYNOPSIS
.Nm mount_vnd
.Op Fl k
.Op Fl K Ar rounds
.Op Fl o Ar options
.Op Fl S Ar saltfile
.Ar image
.Ar node
.Sh DESCRIPTION
The
.Nm
command configures an image file named
.Ar image
using
.Xr vnconfig 8 .
.Pp
This command is invoked by
.Xr mount 8
when using the following syntax:
.Bd -ragged -offset 4n
.Nm mount Op options
-t vnd
.Ar image Ar node
.Ed
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl K Ar rounds
Flag is passed on to
.Xr vnconfig 8 .
It is used to associate an encryption key using a salt file
and a specified number of
.Ar rounds
for PKCS #5 PBKDF2 with the vnd device.
.It Fl k
Flag is passed on to
.Xr vnconfig 8 .
It is used to associate an encryption key with the vnd device.
.It Fl o Ar options
Options are specified with a
.Fl o
flag followed by a comma separated string of options.
See the
.Xr mount 8
man page for possible options and their meanings.
.Pp
At the moment,
.Fl o
is only here for compatibility reasons, but no use is made of supplied
options.
.It Fl S Ar saltfile
Flag is passed on to
.Xr vnconfig 8 .
It is used to specify the name of the saltfile used with
.Fl K .
If the salt filename is not specified using
.Fl S ,
it defaults to
.Ar image Ns .slt .
.El
.Sh EXAMPLES
Some possible vnd configurations for
.Pa /etc/fstab
are listed below.
.Pp
For lines with type
.Dq ffs ,
the
.Dq noauto
option must be set to prevent a
.Xr mount 8
of the FFS partitions
before the necessary vnd devices are configured.
Also, the
.Dq fs_passno
field has to be set to 0 to prevent
.Xr fsck 8
from checking the file system for the same reasons.
.Bd -literal -offset indent
/home/img1 /dev/svnd1c vnd rw 0 0
/dev/svnd1a /home/mnt1 ffs rw,noauto,sync 0 0
/home/img2 /dev/svnd2c vnd rw 0 0
/dev/svnd2a /home/mnt2 ffs rw,sync,noauto,nodev,nosuid 0 0
/home/img3 /dev/svnd3c vnd rw,-k 0 0
/dev/svnd3a /home/mnt3 ffs rw,sync,noauto,nodev,nosuid 0 0
/home/img4 /dev/svnd4c vnd rw,-K=20000 0 0
/dev/svnd4a /home/mnt4 ffs rw,sync,noauto,nodev,nosuid 0 0
/home/img5 /dev/svnd5c vnd rw,-K=20000,-S=/home/img5.salt 0 0
/dev/svnd5a /home/mnt5 ffs rw,noauto 0 0
/dev/svnd5d /home/mnt6 ffs rw,noauto 0 0
/dev/svnd5e /home/mnt7 ffs rw,noauto 0 0
.Ed
.Sh SEE ALSO
.Xr vnd 4 ,
.Xr fstab 5 ,
.Xr mount 8 ,
.Xr umount 8
.Sh HISTORY
The
.Nm
command first appeared in
.Ox 4.2 .
.Sh AUTHORS
.An David Krause .
.Sh BUGS
Checking filesystems within svnd images using
.Xr fsck 8
at boot time, as well as mounting them at that point of time is not yet
possible, because the mount option
.Dq noauto
still is necessary at the moment.
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