74 lines
2.7 KiB
Groff
74 lines
2.7 KiB
Groff
.\" $NetBSD: rump_syspuffs.8,v 1.3 2009/06/09 14:27:17 pooka Exp $
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.\"
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.\" Copyright (c) 2008 Antti Kantee. 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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.Dd June 9, 2009
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.Dt RUMP_SYSPUFFS 8
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.Os
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.Sh NAME
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.Nm rump_syspuffs
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.Nd mount a puffs file server with a userspace puffs loop
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.Sh SYNOPSIS
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.Cd "file-system PUFFS"
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.Cd "pseudo-device putter"
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.Pp
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.Nm
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.Ar "file_server"
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.Ar arguments
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.Sh DESCRIPTION
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The
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.Nm
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utility can be used to mount any
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.Xr puffs 3
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file server so that the requests are passed through the kernel
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puffs code in userspace as well.
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Therefore the approximate callgraph looks a little like the following,
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where k and u denote code running in the kernel space and userspace,
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respectively:
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puffs vfs (k) \(-\*[Gt] libpuffs (u) \(-\*[Gt] p2k (u) \(-\*[Gt] puffs vfs (u) \(-\*[Gt]
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libpuffs (u) \(-\*[Gt] file server (u).
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The response path is the same, but in reverse.
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.Pp
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In its current state,
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.Nm
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is most useful as a proof of concept for file system distribution
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and for developing and debugging the kernel portion of puffs.
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.Sh EXAMPLES
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Mount a file system with sshfs:
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.Dl rump_syspuffs mount_psshfs server.address /mnt
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.Pp
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Mount an ntfs file system using ntfs-3g (from pkgsrc/filesystems/fuse-ntfs-3g),
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set the default uid to 1323:
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.Dl rump_syspuffs ntfs-3g -o uid=1323 /path/to/filesystem /mnt
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.Sh SEE ALSO
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.Xr p2k 3 ,
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.Xr puffs 3 ,
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.Xr rump 3 ,
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.Xr puffs 4
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.Sh HISTORY
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The
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.Nm
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debugging utility first appeared in
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.Nx 5.0 .
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