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NetBSD 6.1.5 - man page for rump_v7fs (netbsd section 8)

RUMP_V7FS(8)			   BSD System Manager's Manual			     RUMP_V7FS(8)

NAME
     rump_v7fs -- mount a v7fs image with a userspace server

SYNOPSIS
     file-system PUFFS
     pseudo-device putter

     rump_v7fs [options] image mountpoint

DESCRIPTION
     NOTE! This manual page describes features specific to the rump(3) file server.  Please see
     mount_v7fs(8) for a full description of the available command line options.

     The rump_v7fs utility can be used to mount v7fs file systems.  It uses rump(3) and p2k(3) to
     facilitate running the file system as a server in userspace.  As opposed to mount_v7fs(8),
     rump_v7fs does not use file system code within the kernel and therefore does not require
     kernel support except puffs(4).  Apart from a minor speed penalty there is no downside with
     respect to in-kernel code.

     rump_v7fs does not require using vnconfig(8) for mounts from regular files and the file path
     can be passed directly as the image parameter.  In fact, the use of vnconfig(8) is discour-
     aged, since it is unable to properly deal with images on sparse files.

     In case the image contains multiple partitions, the desired partition must be indicated by
     appending the token ``%DISKLABEL:p%'' to the image path.  The letter ``p'' specifies the
     partition as obtained via disklabel(8).  For example, to mount partition ``e'' from image
     /tmp/wd0.img, use ``/tmp/wd0.img%DISKLABEL:e%''.

     It is recommended that untrusted file system images be mounted with rump_v7fs instead of
     mount_v7fs(8).  Corrupt file system images commonly cause the file system to crash the
     entire kernel, but with rump_v7fs only the userspace server process will dump core.

     To use rump_v7fs via mount(8), the flags -o rump and -t v7fs should be given.  Similarly,
     rump_v7fs is used instead of mount_v7fs(8) if ``rump'' is added to the options field of
     fstab(5).

SEE ALSO
     p2k(3), puffs(3), rump(3), mount_v7fs(8)

HISTORY
     The rump_v7fs utility first appeared in NetBSD 6.0.

BSD					November 21, 2010				      BSD


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