Bug#484370: lvm2: please consider adding pvinfo to the Debian package
Carsten Hey
c.hey at web.de
Tue Jun 3 22:01:25 UTC 2008
Package: lvm2
Severity: wishlist
Hi,
please consider adding pvinfo, a small perl tool to display the physical
allocation layout of lvm physical volumes to the Debian package lvm2.
Maybe upstream is interested too.
pvinfo is written by Uli Martens and released under the the GNU General
Public Version 2, its Homepage is http://youam.net/devel/pvinfo/
The manpage has not been added to the homepage, since it has just been
written by Uli and me, but it is attached to this mail, as is pvinfo
itself.
Example:
$ /home/carsten/bin/pvinfo | head -n 10
first/last PE #PE device first/last LE
vg: vg_foghorn
pv: /dev/hda3
( 0 .. 124 ( 125 )) -- /dev/vg_foghorn/usr ( 0 .. 124 )
( 125 .. 249 ( 125 )) -- /dev/vg_foghorn/var ( 0 .. 124 )
( 250 .. 499 ( 250 )) -- /dev/vg_foghorn/vserver ( 0 .. 249 )
( 500 .. 624 ( 125 )) -- /dev/vg_foghorn/srv ( 0 .. 124 )
( 625 .. 874 ( 250 )) -- /dev/vg_foghorn/home ( 0 .. 249 )
( 875 .. 999 ( 125 )) -- /dev/vg_foghorn/usr ( 125 .. 249 )
( 1000 .. 1024 ( 25 )) -- /dev/vg_foghorn/srv ( 125 .. 149 )
Thanks,
Carsten
-------------- next part --------------
#!/usr/bin/perl
# show the distribution of LVs/LEs in the systems PVs
#
# Copyright 2005, 2008 Uli Martens <uli at youam.net>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# version 2 as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
# ChangeLog:
# 2008-01-20 Uli Martens <uli at youam.net>
# * fix off-by-two error for lv slice sizes
# 2005-04-11 Uli Martens <uli at youam.net>
# * written
# Example Output:
# $ ~/bin/pvinfo
# first/last PE #PE device first/last LE
# vg: vg
# pv: /dev/md5
# ( 0 .. 295 ( 296 )) -- /dev/vg/backup ( 0 .. 295 )
# ( 296 .. 807 ( 512 )) -- /dev/vg/kyra ( 0 .. 511 )
# [...]
use strict;
use warnings;
# ---- vv config ----
my $pvdisplay_file = "pvdisplay |";
my $lvdisplay_file = "lvdisplay -m |";
my $lvname_width = 25;
# -------------------
my $all;
my $pv;
my $lv;
my $vg;
open PVD, $pvdisplay_file
or die "can't get pvdisplay info: $!";
while (<PVD>) {
if ( m/^ PV Name\s+(.*)$/ ) {
$pv = $1;
next;
}
if ( m/^ VG Name\s+(.*)$/ ) {
$vg = $1;
next;
}
if ( m/^ Total PE\s+(.*)$/ ) {
$all->{$vg}->{$pv}->{size} = $1 -1;
undef $vg;
undef $pv;
next;
}
# print;
}
close PVD;
open LVD, $lvdisplay_file
or die "can't get lvdisplay info: $!";
VG: while (<LVD>) {
if ( m/^ LV Name\s+(.*)$/ ) {
$lv = $1;
next;
}
if ( m/^ VG Name\s+(.*)$/ ) {
$vg = $1;
next;
}
if ( m/^ --- Segments ---$/ ) {
my $from;
my $to;
my $pfrom;
my $pto;
my $pv;
while (<LVD>) {
if ( m/^ --- Logical volume ---/ ) {
next VG;
}
if ( m/^ Logical extent (\d+) to (\d+):$/ ) {
$from = $1;
$to = $2;
next;
}
if ( m/^ Physical volume\s+(.*)$/ ) {
$pv = $1;
next;
}
if ( m/^ Physical extents\s+(\d+) to (\d+)$/ ) {
$pfrom = $1;
$pto = $2;
next;
}
if ( m/^\s*$/ and defined $pv ) {
#print "GOT: $pv / $from / $to\n";
$all->{$vg}->{$pv}->{lvs}->{$pfrom} = {
from => $pfrom,
to => $pto,
lv => $lv,
pv => $pv,
pfrom => $from,
pto => $to,
};
undef $pv;
undef $from;
undef $to;
}
#print ">> $_";
}
}
#print "XX $_";
}
close LVD;
printf " %17s %5s %*s %17s\n",
"first/last PE", "#PE", -$lvname_width, "device", "first/last LE";
for my $vg ( sort keys %{$all} ) {
print "vg: $vg\n";
for my $pv ( sort keys %{$all->{$vg}} ) {
print " pv: $pv\n";
my $pelast = -1;
for my $x ( sort { $a <=> $b } keys %{$all->{$vg}->{$pv}->{lvs}} ) {
if ( $pelast + 1 != $all->{$vg}->{$pv}->{lvs}->{$x}->{from} ) {
printf " (%7i ..%7i (%5i ))\n",
$pelast+1,
$all->{$vg}->{$pv}->{lvs}->{$x}->{from} -1,
$all->{$vg}->{$pv}->{lvs}->{$x}->{from} - $pelast -1;
}
printf " (%7i ..%7i (%5i )) -- %*s (%7i ..%7i )\n",
$all->{$vg}->{$pv}->{lvs}->{$x}->{from},
$all->{$vg}->{$pv}->{lvs}->{$x}->{to},
$all->{$vg}->{$pv}->{lvs}->{$x}->{to} - $all->{$vg}->{$pv}->{lvs}->{$x}->{from} +1,
-$lvname_width,
$all->{$vg}->{$pv}->{lvs}->{$x}->{lv},
$all->{$vg}->{$pv}->{lvs}->{$x}->{pfrom},
$all->{$vg}->{$pv}->{lvs}->{$x}->{pto};
$pelast = $all->{$vg}->{$pv}->{lvs}->{$x}->{to};
}
if ( $pelast != $all->{$vg}->{$pv}->{size} ) {
printf " (%7i ..%7i (%5i ))\n",
$pelast +1,
$all->{$vg}->{$pv}->{size},
$all->{$vg}->{$pv}->{size} - $pelast;
}
}
}
-------------- next part --------------
.TH PVINFO 8
.SH "NAME"
pvinfo \- display the physical allocation layout of lvm physical volumes
.SH "SYNOPSIS"
\fBpvinfo\fR
.SH "DESCRIPTION"
.PP
\fBpvinfo\fR is a small \fBperl\fR tool to display the distribution of logical
volumes and logical extends in the \fBlvm\fR physical volumes known to the
system.
.SH "USAGE"
\fBpvinfo\fR doesn't have any options.
.PP
It needs root privileges to execute the \fBlvm\fR tools \fBpvdisplay\fR and
\fBlvdisplay\fR, whose output it parses. It is recommended to call
\fBpvinfo\fR with \fBsudo\fR from a normal user's account.
.SH "BUGS"
Please report bugs or fixes to Uli Martens <uli at youam.net>.
.SH "COPYING"
\fBpvinfo\fR is released under the the GNU General Public Version 2 (not
above). The full legalese can be found in \fBpvinfo\fR.
.SH "SEE ALSO"
.BR lvm (8),
.BR pvdisplay (8),
.BR lvdisplay (1),
.BR sudo (8),
.BR perl (1).
.SH "AUTHOR"
\fBpvinfo\fR was written by Uli Martens. This manpage has been written by Uli
Martens and Carsten Hey and is published under the same terms as \fBpvinfo\fR
itself.
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