1.\" $NetBSD: rump_syspuffs.8,v 1.4 2012/11/14 23:11:27 njoly Exp $ 2.\" 3.\" Copyright (c) 2008 Antti Kantee. All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.Dd June 9, 2009 27.Dt RUMP_SYSPUFFS 8 28.Os 29.Sh NAME 30.Nm rump_syspuffs 31.Nd mount a puffs file server with a userspace puffs loop 32.Sh SYNOPSIS 33.Cd "file-system PUFFS" 34.Cd "pseudo-device putter" 35.Pp 36.Nm 37.Ar "file_server" 38.Ar arguments 39.Sh DESCRIPTION 40The 41.Nm 42utility can be used to mount any 43.Xr puffs 3 44file server so that the requests are passed through the kernel 45puffs code in userspace as well. 46Therefore the approximate callgraph looks a little like the following, 47where k and u denote code running in the kernel space and userspace, 48respectively: 49puffs vfs (k) \(-> libpuffs (u) \(-> p2k (u) \(-> puffs vfs (u) \(-> 50libpuffs (u) \(-> file server (u). 51The response path is the same, but in reverse. 52.Pp 53In its current state, 54.Nm 55is most useful as a proof of concept for file system distribution 56and for developing and debugging the kernel portion of puffs. 57.Sh EXAMPLES 58Mount a file system with sshfs: 59.Dl rump_syspuffs mount_psshfs server.address /mnt 60.Pp 61Mount an ntfs file system using ntfs-3g (from pkgsrc/filesystems/fuse-ntfs-3g), 62set the default uid to 1323: 63.Dl rump_syspuffs ntfs-3g -o uid=1323 /path/to/filesystem /mnt 64.Sh SEE ALSO 65.Xr p2k 3 , 66.Xr puffs 3 , 67.Xr rump 3 , 68.Xr puffs 4 69.Sh HISTORY 70The 71.Nm 72debugging utility first appeared in 73.Nx 5.0 . 74