From 35bc9a0d7e11829c01a912e50332580891f10fa5 Mon Sep 17 00:00:00 2001
From: Pascal Rigaux <pixel@mandriva.com>
Date: Wed, 29 Jun 2005 05:04:46 +0000
Subject: the output of "dmraid -r" is not enough, "dmraid -s" is more
 important. add some sample output for easy debugging

---
 perl-install/fs/dmraid.pm | 120 ++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 110 insertions(+), 10 deletions(-)

diff --git a/perl-install/fs/dmraid.pm b/perl-install/fs/dmraid.pm
index 6916ab324..30427c0a7 100644
--- a/perl-install/fs/dmraid.pm
+++ b/perl-install/fs/dmraid.pm
@@ -20,11 +20,17 @@ sub init() {
     eval { modules::load('dm-mirror') };
     devices::init_device_mapper();
     if ($::isInstall) {
-	run_program::run('dmraid', '-ay');
+	call_dmraid('-ay');
     }
     1;
 }
 
+#- call_dmraid is overloaded when debugging, see the end of this file
+sub call_dmraid {
+    my ($option) = @_;
+    run_program::get_stdout('dmraid', $option);
+}
+
 sub check {
     my ($in) = @_;
 
@@ -33,26 +39,120 @@ sub check {
     1;
 }
 
-sub pvs_and_vgs() {
+sub _raid_devices_raw() {
     map {
-	my @l = split(':');
-	{ pv => $l[0], format => $l[1], vg => $l[2], level => $l[3], status => $l[4] };
-    } run_program::get_stdout('dmraid', '-rcc');
+	chomp;
+	my %l; @l{qw(pv format vg level status size)} = split(':');
+	\%l;
+    } call_dmraid('-ccr');
+}
+
+sub _raid_devices() {
+    my @l = _raid_devices_raw();
+    my %vg2pv; push @{$vg2pv{$_->{vg}}}, delete $_->{pv} foreach @l;
+    map {
+	delete $_->{size}; #- now irrelevant
+	$_->{disks} = $vg2pv{$_->{vg}};
+	$_;
+    } uniq_ { $_->{vg} } @l;
+}
+
+sub _sets_raw() {
+    map {
+	chomp;
+	my %l; @l{qw(name size stride level status subsets devs spares)} = split(':');
+	\%l;
+    } call_dmraid('-ccs');
+}
+
+sub _sets() {
+    my @sets = _sets_raw();
+    my @raid_devices = _raid_devices();
+    foreach (@sets) {
+	my $name = $_->{name};
+	my @l = grep { begins_with($name, $_->{vg}) } @raid_devices;
+	if (@l) {
+	    log::l("ERROR: multiple match for set $name: " . join(' ', map { $_->{vg} } @l)) if @l > 1;
+	    my ($raid) = @l;
+	    add2hash($_, $raid);
+	} else {
+	    log::l("ERROR: no matching raid devices for set $name");
+	}
+    }
+    @sets;
 }
 
 sub vgs() {
-    my @l = pvs_and_vgs();
-    my %vg2pv; push @{$vg2pv{$_->{vg}}}, $_->{pv} foreach @l;
     map {
-	my $dev = "mapper/$_->{vg}";
+	my $dev = "mapper/$_->{name}";
 	my $vg = fs::wild_device::to_subpart("/dev/$dev");
-	add2hash($vg, { media_type => 'hd', prefix => $dev, bus => "dm_$_->{format}", disks => $vg2pv{$_->{vg}} });
+	add2hash($vg, { media_type => 'hd', prefix => $dev, bus => "dm_$_->{format}", disks => $_->{disks} });
 
 	#- device should exist, created by dmraid(8) using libdevmapper
 	#- if it doesn't, we suppose it's not in use
 	if_(-e "/dev/$dev", $vg); 
 
-    } grep { $_->{status} eq 'ok' } uniq_ { $_->{vg} } @l;
+    } grep { $_->{status} eq 'ok' } _sets();
+}
+
+if ($ENV{DRAKX_DEBUG_DMRAID}) {
+    eval(<<'EOF');
+    my %debug_data = (
+    
+     isw => {
+    
+      # dmraid -s ####################
+      # *** Group superset isw_ffafgbdhi
+      # --> Active Subset
+      # name   : isw_ffafgbdhi_toto
+      # size   : 234441216
+      # stride : 256
+      # type   : mirror
+      # status : ok
+      # subsets: 0
+      # devs   : 2
+      # spares : 0
+    
+      '-ccs' => "isw_ffafgbdhi_toto:234441216:256:mirror:ok:0:2:0\n",
+    
+      # dmraid -r ####################
+      #/dev/sda: isw, "isw_ffafgbdhi", GROUP, ok, 488397166 sectors, data@ 0
+      #/dev/sdb: isw, "isw_ffafgbdhi", GROUP, ok, 234441646 sectors, data@ 0
+    
+      '-ccr' => "/dev/sda:isw:isw_ffafgbdhi:GROUP:ok:488397166:0\n" .
+                "/dev/sdb:isw:isw_ffafgbdhi:GROUP:ok:234441646:0\n",
+     },
+    
+     pdc => {
+      # dmraid -s ####################
+      # *** Active Set
+      # name   : pdc_bcefbiigfg
+      # size   : 80043200
+      # stride : 128
+      # type   : mirror
+      # status : ok
+      # subsets: 0
+      # devs   : 2
+      # spares : 0
+    
+      '-ccs' => "pdc_bcefbiigfg:80043200:128:mirror:ok:0:2:0\n",
+    
+      # dmraid -r ####################
+      # /dev/sda: pdc, "pdc_bcefbiigfg", mirror, ok, 80043200 sectors, data@ 0
+      # /dev/sdb: pdc, "pdc_bcefbiigfg", mirror, ok, 80043200 sectors, data@ 0
+    
+      '-ccr' => "/dev/sda:pdc:pdc_bcefbiigfg:mirror:ok:80043200:0\n" .
+                "/dev/sdb:pdc:pdc_bcefbiigfg:mirror:ok:80043200:0\n",
+      },
+    
+    );
+    
+    *call_dmraid = sub {
+        my ($option) = @_;
+        my $s = $debug_data{$ENV{DRAKX_DEBUG_DMRAID}}{$option} or return;
+        split("\n", $s);
+    };
+EOF
 }
 
 1;
-- 
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