LVM2 unmounting and disabling support in ClearMountsJob.

src/modules/partition/jobs/ClearMountsJob.cpp

@@ -49,12 +49,14 @@ ClearMountsJob::exec()
 {
     QStringList goodNews;
 
+    QString deviceName = m_device->deviceNode().split( '/' ).last();
+
     QProcess process;
     process.setProgram( "sh" );
     process.setArguments( {
                               "-c",
                               QString( "echo $(awk '{print $4}' /proc/partitions | sed -e '/name/d' -e '/^$/d' -e '/[1-9]/!d' | grep %1)" )
-                                      .arg( m_device->deviceNode().split( '/' ).last() )
+                                      .arg( deviceName )
                           } );
     process.start();
     process.waitForFinished();
@@ -62,19 +64,65 @@ ClearMountsJob::exec()
     QString partitions = process.readAllStandardOutput();
     QStringList partitionsList = partitions.simplified().split( ' ' );
 
+    // First we umount all LVM logical volumes we can find
+    process.start( "lvscan", { "-a" } );
+    process.waitForFinished();
+    if ( process.exitCode() == 0 ) //means LVM2 tools are installed
+    {
+        QStringList lvscanLines = QString::fromLocal8Bit( process.readAllStandardOutput() ).split( '\n' );
+        foreach ( const QString& lvscanLine, lvscanLines )
+        {
+            QString lvPath = lvscanLine.simplified().split( ' ' ).value( 1 ); //second column
+            lvPath = lvPath.replace( '\'', "" );
+
+            QString news = tryUmount( lvPath );
+            if ( !news.isEmpty() )
+                goodNews.append( news );
+        }
+    }
+    else
+        cDebug() << "WARNING: this system does not seem to have LVM2 tools.";
+
+    // Then we go looking for volume groups that use this device for physical volumes
+    process.start( "pvdisplay", { "-C", "--noheadings" } );
+    process.waitForFinished();
+    if ( process.exitCode() == 0 ) //means LVM2 tools are installed
+    {
+        QString pvdisplayOutput = process.readAllStandardOutput();
+        if ( !pvdisplayOutput.simplified().isEmpty() ) //means there is at least one LVM PV
+        {
+            QSet< QString > vgSet;
+
+            QStringList pvdisplayLines = pvdisplayOutput.split( '\n' );
+            foreach ( const QString& pvdisplayLine, pvdisplayLines )
+            {
+                QString pvPath = pvdisplayLine.simplified().split( ' ' ).value( 0 );
+                QString vgName = pvdisplayLine.simplified().split( ' ' ).value( 1 );
+                if ( !pvPath.contains( deviceName ) )
+                    continue;
+
+                vgSet.insert( vgName );
+            }
+
+            foreach ( const QString& vgName, vgSet )
+            {
+                process.start( "vgchange", { "-an", vgName } );
+                process.waitForFinished();
+                if ( process.exitCode() == 0 )
+                    goodNews.append( QString( "Successfully disabled volume group %1." ).arg( vgName ) );
+            }
+        }
+    }
+    else
+        cDebug() << "WARNING: this system does not seem to have LVM2 tools.";
+
     foreach ( QString p, partitionsList )
     {
         QString partPath = QString( "/dev/%1" ).arg( p );
 
-        process.start( "umount", { partPath } );
-        process.waitForFinished();
-        if ( process.exitCode() == 0 )
-            goodNews.append( QString( "Successfully unmounted %1." ).arg( partPath ) );
-
-        process.start( "swapoff", { partPath } );
-        process.waitForFinished();
-        if ( process.exitCode() == 0 )
-            goodNews.append( QString( "Successfully disabled swap %1." ).arg( partPath ) );
+        QString news = tryUmount( partPath );
+        if ( !news.isEmpty() )
+            goodNews.append( news );
     }
 
     Calamares::JobResult ok = Calamares::JobResult::ok();
@@ -86,3 +134,21 @@ ClearMountsJob::exec()
 
     return ok;
 }
+
+
+QString
+ClearMountsJob::tryUmount( const QString& partPath )
+{
+    QProcess process;
+    process.start( "umount", { partPath } );
+    process.waitForFinished();
+    if ( process.exitCode() == 0 )
+        return QString( "Successfully unmounted %1." ).arg( partPath );
+
+    process.start( "swapoff", { partPath } );
+    process.waitForFinished();
+    if ( process.exitCode() == 0 )
+        return QString( "Successfully disabled swap %1." ).arg( partPath );
+
+    return QString();
+}

src/modules/partition/jobs/ClearMountsJob.h

@@ -35,6 +35,7 @@ public:
     QString prettyName() const override;
     Calamares::JobResult exec() override;
 private:
+    QString tryUmount( const QString& partPath );
     Device* m_device;
 };