PUFFS(4) BSD Kernel Interfaces Manual PUFFS(4)NAME
puffs -- Pass-to-Userspace Framework File System
SYNOPSIS
file-system PUFFS
pseudo-device putter
DESCRIPTION
puffs provides a framework for creating file systems as userspace servers. The in-kernel VFS attachment is controlled through a special
device node, /dev/puffs. People looking to implement file systems should use the system through the convenience library described in
puffs(3).
Termination
A puffs file system can be unmounted regularly using umount(8). The file system will automatically be unmounted in case the userspace server
is killed or the control file descriptor closed.
SEE ALSO puffs(3)HISTORY
An unsupported experimental version of puffs first appeared in NetBSD 4.0. A stable version appeared in NetBSD 5.0.
AUTHORS
Antti Kantee <pooka@iki.fi>
BSD November 22, 2009 BSD
Check Out this Related Man Page
RUMP_CD9660(8) BSD System Manager's Manual RUMP_CD9660(8)NAME
rump_cd9660 -- mount a cd9660 image with a userspace server
SYNOPSIS
file-system PUFFS
pseudo-device putter
rump_cd9660 [options] image mountpoint
DESCRIPTION
NOTE! This manual page describes features specific to the rump(3) file server. Please see mount_cd9660(8) for a full description of the
available command line options.
The rump_cd9660 utility can be used to mount cd9660 file systems. It uses rump(3) and p2k(3) to facilitate running the file system as a
server in userspace. As opposed to mount_cd9660(8), rump_cd9660 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_cd9660 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 discouraged, 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_cd9660 instead of mount_cd9660(8). Corrupt file system images com-
monly cause the file system to crash the entire kernel, but with rump_cd9660 only the userspace server process will dump core.
To use rump_cd9660 via mount(8), the flags -o rump and -t cd9660 should be given. Similarly, rump_cd9660 is used instead of mount_cd9660(8)
if ``rump'' is added to the options field of fstab(5).
SEE ALSO p2k(3), puffs(3), rump(3), mount_cd9660(8)HISTORY
The rump_cd9660 utility first appeared in NetBSD 5.0.
BSD November 21, 2010 BSD