1.\" 2.\" Copyright (c) 2006 Craig Rodrigues 3.\" 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.\" 3. The name of the author may not be used to endorse or promote products 14.\" derived from this software without specific prior written permission 15.\" 16.\" THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26.\" 27.Dd December 30, 2018 28.Dt EXT2FS 4 29.Os 30.Sh NAME 31.Nm ext2fs 32.Nd "ext2/ext3/ext4 file system" 33.Sh SYNOPSIS 34To link into the kernel: 35.Bd -ragged -offset indent 36.Cd "options EXT2FS" 37.Ed 38.Pp 39To load as a kernel loadable module: 40.Pp 41.Dl "kldload ext2fs" 42.Sh DESCRIPTION 43The 44.Nm 45driver will permit the 46.Fx 47kernel to access 48ext2 49file systems and its derivatives. 50It currently implements most of the features required by 51.Em ext3 52and 53.Em ext4 54file systems. 55Support for Extended Attributes in 56.Em ext4 57is experimental. 58Journalling and encryption are currently not supported. 59.Sh EXAMPLES 60To mount a 61.Nm 62volume located on 63.Pa /dev/ada1s1 : 64.Pp 65.Dl "mount -t ext2fs /dev/ada1s1 /mnt" 66.Sh SEE ALSO 67.Xr nmount 2 , 68.Xr unmount 2 , 69.Xr fstab 5 , 70.Xr mount 8 71.Sh HISTORY 72The 73.Nm 74driver first appeared in 75.Fx 2.2 . 76.Sh AUTHORS 77.An -nosplit 78The 79.Nm 80kernel implementation is derived from code written, 81or modified, 82by 83.An Godmar Back 84using the UFS CSRG sources for CMU Mach. 85.Pp 86.An John Dyson 87did the initial port to 88.Fx . 89.An Aditya Sarawgi 90merged important parts of the allocation code from a clean-room 91.Nx 92implementation. 93.An Zheng Liu 94and 95.An Fedor Uporov 96implemented the read and write support respectively for 97.Em ext4 98filesystems. 99The 100.Fx 101community has contributed a huge amount of modifications. 102.Pp 103The initial version of this manual page was written by 104.An Craig Rodrigues Aq Mt rodrigc@FreeBSD.org . 105