1.\" $NetBSD: rump_ext2fs.8,v 1.12 2010/11/22 07:56:55 pooka Exp $ 2.\" 3.\" WARNING: GENERATED FILE, DO NOT EDIT 4.\" INSTEAD, EDIT makerumpmanpages.sh AND REGEN 5.\" from: NetBSD: makerumpmanpages.sh,v 1.12 2010/11/22 07:56:31 pooka Exp 6.\" 7.\" Copyright (c) 2008-2010 Antti Kantee. All rights reserved. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.Dd November 21, 2010 31.Dt RUMP_EXT2FS 8 32.Os 33.Sh NAME 34.Nm rump_ext2fs 35.Nd mount a ext2fs image with a userspace server 36.Sh SYNOPSIS 37.Cd "file-system PUFFS" 38.Cd "pseudo-device putter" 39.Pp 40.Nm 41.Op options 42.Ar image 43.Ar mountpoint 44.Sh DESCRIPTION 45.Em NOTE! 46This manual page describes features specific to the 47.Xr rump 3 48file server. 49Please see 50.Xr mount_ext2fs 8 51for a full description of the available command line options. 52.Pp 53The 54.Nm 55utility can be used to mount ext2fs file systems. 56It uses 57.Xr rump 3 58and 59.Xr p2k 3 60to facilitate running the file system as a server in userspace. 61As opposed to 62.Xr mount_ext2fs 8 , 63.Nm 64does not use file system code within the kernel and therefore does 65not require kernel support except 66.Xr puffs 4 . 67Apart from a minor speed penalty there is no downside with respect to 68in-kernel code. 69.Pp 70.Nm 71does not require using 72.Xr vnconfig 8 73for mounts from regular files and the file path can be passed 74directly as the 75.Ar image 76parameter. 77In fact, the use of 78.Xr vnconfig 8 79is discouraged, since it is unable to properly deal with images on 80sparse files. 81.Pp 82In case the image contains multiple partitions, the desired partition 83must be indicated by appending the token 84.Dq %DISKLABEL:p% 85to the 86.Ar image 87path. 88The letter 89.Dq p 90specifies the partition as obtained via 91.Xr disklabel 8 . 92For example, to mount partition 93.Dq e 94from image 95.Pa /tmp/wd0.img , 96use 97.Dq /tmp/wd0.img%DISKLABEL:e% . 98.Pp 99It is recommended that untrusted file system images be mounted with 100.Nm 101instead of 102.Xr mount_ext2fs 8 . 103Corrupt file system images commonly cause the file system 104to crash the entire kernel, but with 105.Nm 106only the userspace server process will dump core. 107.Pp 108To use 109.Nm 110via 111.Xr mount 8 , 112the flags 113.Fl o Ar rump 114and 115.Fl t Ar ext2fs 116should be given. 117Similarly, 118.Nm 119is used instead of 120.Xr mount_ext2fs 8 121if 122.Dq rump 123is added to the options field of 124.Xr fstab 5 . 125.Sh SEE ALSO 126.Xr p2k 3 , 127.Xr puffs 3 , 128.Xr rump 3 , 129.Xr mount_ext2fs 8 130.Sh HISTORY 131The 132.Nm 133utility first appeared in 134.Nx 5.0 . 135