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#!/usr/bin/perl
# show the distribution of LVs/LEs in the systems PVs
#
# Copyright 2005, 2008, 2009 Uli Martens <uli@youam.net>
# 2009 Peter Palfrader <peter@palfrader.org>
#
# 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:
# 2009-05-30 Peter Palfrader <peter@palfrader.org>
# * teach it about striped logical volumes
# 2009-01-05 Uli Martens <uli@youam.net>
# * right-justify #PE, fixes ragged output for large slices
# 2008-01-20 Uli Martens <uli@youam.net>
# * fix off-by-two error for lv slice sizes
# 2005-04-11 Uli Martens <uli@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 $pv;
LE: while (<LVD>) {
if ( m/^ --- Logical volume ---/ ) {
next VG;
}
if ( m/^ Logical extent (\d+) to (\d+):$/ ) {
$from = $1;
$to = $2;
next;
}
if ( m/^ Type\s+linear$/ ) {
while (<LVD>) {
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;
next LE;
}
#print ">> $_";
}
} elsif ( m/^ Type\s+striped$/ ) {
my $numstripes;
my $curstripe;
while (<LVD>) {
if ( m/^ Stripes\s+(.*)$/ ) {
$numstripes = $1;
next;
}
while (<LVD>) {
if ( m/^ Physical volume\s+(.*)$/ ) {
$pv = $1;
next;
}
if ( m/^ Physical extents\s+(\d+) to (\d+)$/ ) {
$pfrom = $1;
$pto = $2;
next;
}
if ((m/^\s*$/ or m/ Stripe\s+(\d+):/) and defined $pv ) {
#print "GOT: $pv / $from / $to\n";
$all->{$vg}->{$pv}->{lvs}->{$pfrom} = {
from => $pfrom,
to => $pto,
lv => $lv." ($curstripe/$numstripes)",
pv => $pv,
pfrom => $from,
pto => $to,
};
undef $pv;
undef $pfrom;
undef $pto;
}
if (m/ Stripe\s+(\d+):/) {
$curstripe = $1;
}
if ( m/^\s*$/) {
undef $pv;
undef $from;
undef $to;
next LE;
}
}
}
} elsif ( m/^ Type\s+(.*)$/ ) {
warn "Do not understand type $1 for $lv"."'s extend $from - $to.\n";
next LE;
}
}
}
#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 (%6i))\n",
$pelast+1,
$all->{$vg}->{$pv}->{lvs}->{$x}->{from} -1,
$all->{$vg}->{$pv}->{lvs}->{$x}->{from} - $pelast -1;
}
printf " (%7i ..%7i (%6i)) -- %*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 (%6i))\n",
$pelast +1,
$all->{$vg}->{$pv}->{size},
$all->{$vg}->{$pv}->{size} - $pelast;
}
}
}
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