From d8b95bfda569dea5f86392e8fb9f31445275fb22 Mon Sep 17 00:00:00 2001
From: Peter Palfrader <peter@palfrader.org>
Date: Thu, 11 Dec 2008 06:14:28 +0000
Subject: Add youam's pvinfo script

git-svn-id: svn+ssh://asteria.noreply.org/svn/weaselutils/trunk@374 bc3d92e2-beff-0310-a7cd-cc87d7ac0ede
---
 pvinfo | 166 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 166 insertions(+)
 create mode 100755 pvinfo

diff --git a/pvinfo b/pvinfo
new file mode 100755
index 0000000..5b13c69
--- /dev/null
+++ b/pvinfo
@@ -0,0 +1,166 @@
+#!/usr/bin/perl
+
+# show the distribution of LVs/LEs in the systems PVs
+#
+# Copyright 2005, 2008 Uli Martens <uli@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@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 $pv;
+		while (<LVD>) {
+			if ( m/^  --- Logical volume ---/ ) {
+				next VG;
+			}
+			if ( m/^  Logical extent (\d+) to (\d+):$/ ) {
+				$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;
+		}
+	}
+}
-- 
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