Make sure that not only the first disk IO is reported but the sum of all disk IO.

For example: If the computer has devices sda and sdb, add the IO numbers of both devices together.

stacer-core/Info/disk_info.cpp

@@ -8,14 +8,13 @@ QList<Disk*> DiskInfo::getDisks() const
 
 void DiskInfo::updateDiskInfo()
 {
-    qDeleteAll(disks);
     disks.clear();
 
     QList<QStorageInfo> storageInfoList = QStorageInfo::mountedVolumes();
 
     for(const QStorageInfo &info: storageInfoList) {
         if (info.isValid()) {
-            Disk *disk = new Disk();
+            Disk *disk = new Disk;
             disk->name = info.displayName();
             disk->device = info.device();
             disk->size = info.bytesTotal();
@@ -38,11 +37,6 @@ QList<QString> DiskInfo::devices()
     return set.toList();
 }
 
-DiskInfo::~DiskInfo()
-{
-    qDeleteAll(disks);
-}
-
 QList<QString> DiskInfo::fileSystemTypes()
 {
     QSet<QString> set;
@@ -55,30 +49,36 @@ QList<QString> DiskInfo::fileSystemTypes()
 
 QList<quint64> DiskInfo::getDiskIO() const
 {
-    static QString diskName = getDiskName();
+    static QStringList diskNames = getDiskNames();
 
     QList<quint64> diskReadWrite;
+    quint64 totalRead = 0;
+    quint64 totalWrite = 0;
 
-    QStringList diskStat = FileUtil::readStringFromFile(QString("/sys/block/%1/stat").arg(diskName))
-            .trimmed()
-            .split(QRegExp("\\s+"));
+    for (const QString diskName : diskNames) {
+      QStringList diskStat = FileUtil::readStringFromFile(QString("/sys/block/%1/stat").arg(diskName))
+              .trimmed()
+              .split(QRegExp("\\s+"));
 
-    if (diskStat.count() > 7) {
-        diskReadWrite.append(diskStat.at(2).toLongLong() * 512);
-        diskReadWrite.append(diskStat.at(6).toLongLong() * 512);
+      if (diskStat.count() > 7) {
+          totalRead = totalRead + (diskStat.at(2).toLongLong() * 512);
+          totalWrite = totalWrite + (diskStat.at(6).toLongLong() * 512);
+      }
     }
+    diskReadWrite.append(totalRead);
+    diskReadWrite.append(totalWrite);
 
     return diskReadWrite;
 }
 
-QString DiskInfo::getDiskName() const
+QStringList DiskInfo::getDiskNames() const
 {
     QDir blocks("/sys/block");
-
+    QStringList disks;
     for (const QFileInfo entryInfo : blocks.entryInfoList(QDir::AllEntries | QDir::NoDotAndDotDot)) {
         if (QFile::exists(QString("%1/device").arg(entryInfo.absoluteFilePath()))) {
-            return entryInfo.baseName();
+            disks.append(entryInfo.baseName());
         }
     }
-    return QString();
+    return disks;
 }

stacer-core/Info/disk_info.h

@@ -17,16 +17,16 @@ public:
     QList<Disk*> getDisks() const;
     void updateDiskInfo();
     QList<quint64> getDiskIO() const;
-    QString getDiskName() const;
+    QStringList getDiskNames() const;
     QList<QString> fileSystemTypes();
     QList<QString> devices();
-    ~DiskInfo();
 
 private:
     QList<Disk*> disks;
 };
 
-struct Disk {
+class Disk {
+public:
     QString name;
     QString device;
     QString fileSystemType;