157 lines
4.9 KiB
Groff
157 lines
4.9 KiB
Groff
.\" Copyright (c) 2000 Christoph Herrmann, Thomas-Henning von Kamptz
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.\" Copyright (c) 1980, 1989, 1993 The Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Christoph Herrmann and Thomas-Henning von Kamptz, Munich and Frankfurt.
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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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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgment:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors, as well as Christoph
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.\" Herrmann and Thomas-Henning von Kamptz.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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.\" $TSHeader: src/sbin/ffsinfo/ffsinfo.8,v 1.3 2000/12/12 19:30:55 tomsoft Exp $
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.\" $FreeBSD$
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.\"
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.Dd September 8, 2000
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.Dt FSINFO 8
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.Os
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.Sh NAME
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.Nm ffsinfo
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.Nd "dump all meta information of an existing ufs file system"
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.Sh SYNOPSIS
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.Nm
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.Op Fl L
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.Op Fl g Ar cylinder_group
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.Op Fl i Ar inode
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.Op Fl l Ar level
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.Op Fl o Ar outfile
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.Ar special | file
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.Sh DESCRIPTION
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The
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.Nm
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utility extends the
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.Xr dumpfs 8
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utility.
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.Pp
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The output is generated into the file
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.Pa outfile .
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Also expect the output file to be rather large.
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Up to 2 percent of the size of the specified file system is not uncommon.
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.Pp
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The following options are available:
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.Bl -tag -width indent
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.It Fl L
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Specifying this option skips the tests of the disklabel.
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This is done automatically, if the specified filename to dump is a plain file.
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.It Fl g Ar cylinder_group
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This restricts the dump to information about this cylinder group only.
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Here
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.Ar 0
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means the first cylinder group and
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.Ar -1
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the last one.
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.It Fl i Ar inode
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This restricts the dump to information about this particular inode only.
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Here the minimum acceptable inode is
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.Ar 2 .
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If this option is omitted but a cylinder group is defined then only inodes
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within that cylinder group are dumped.
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.It Fl l Ar level
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The level of detail which will be dumped.
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This value defaults to
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.Ar 255
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and is the
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.Dq bitwise or
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of the following table:
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.Pp
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.Bl -hang -width indent -compact
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.It Ar 0x001
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initial superblock
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.It Ar 0x002
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superblock copies in each cylinder group
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.It Ar 0x004
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cylinder group summary in initial cylinder group
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.It Ar 0x008
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cylinder group information
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.It Ar 0x010
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inode allocation bitmap
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.It Ar 0x020
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fragment allocation bitmap
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.It Ar 0x040
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cluster maps and summary
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.It Ar 0x080
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rotational layout tables
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.It Ar 0x100
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inode information
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.It Ar 0x200
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indirect block dump
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.El
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.It Fl o Ar outfile
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This allows to change the output filename where the dump is written to.
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The current default is
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.Pa /var/tmp/ffsinfo .
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If
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.Fl
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is provided, output will be sent to stdout.
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.El
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.Sh EXAMPLES
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.Dl ffsinfo -l 1023 /dev/vinum/testvol
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.Pp
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will dump
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.Pa /dev/vinum/testvol
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with all available information.
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.Sh BUGS
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Currently
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.Nm
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can only dump unmounted file systems.
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Do not try dumping a mounted file system, your system may panic and you will
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not be able to use the file system any longer.
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.Pp
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Also snapshots are handled like plain files.
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They should get their own level to provide for independent control of the
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amount of what gets dumped.
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It probably also makes sense to some extend to dump the snapshot as a
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file system.
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.Sh SEE ALSO
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.Xr disklabel 8 ,
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.Xr dumpfs 8 ,
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.Xr fsck 8 ,
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.Xr growfs 8 ,
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.Xr newfs 8 ,
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.Xr tunefs 8 ,
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.Xr vinum 8
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.Sh AUTHORS
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.An Christoph Herrmann Aq chm@FreeBSD.org
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.An Thomas-Henning von Kamptz Aq tomsoft@FreeBSD.org
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.An The GROWFS team Aq growfs@Tomsoft.COM
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.Sh HISTORY
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The
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.Nm
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utility first appeared in
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.Fx 4.4 .
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