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QUsbStorageGadget Class Reference
[QtBaseModule]

The QUsbStorageGadget class is used to enable mass storage class of USB gadgets. More...

    #include <QUsbStorageGadget>

Inherits QUsbGadget.

Inherited by QUsbStorageGadgetProvider.

• List of all members, including inherited members

Public Functions

• QUsbStorageGadget ( const QString & group = QString(), QObject * parent = 0, QAbstractIpcInterface::Mode mode = Client )
• QStringList backingStore () const

• 10 public functions inherited from QUsbGadget
• 4 public functions inherited from QAbstractIpcInterface
• 29 public functions inherited from QObject

Public Slots

• virtual void addBackingStore ( const QString & path )
• virtual void removeBackingStore ( const QString & path )
• virtual void setBackingStore ( const QStringList & paths )

• 7 public slots inherited from QUsbGadget
• 1 public slot inherited from QObject

Additional Inherited Members

• 1 property inherited from QObject
• 4 signals inherited from QUsbGadget
• 1 signal inherited from QAbstractIpcInterface
• 1 signal inherited from QObject
• 1 public type inherited from QObject
• 4 static public members inherited from QObject
• 14 protected functions inherited from QAbstractIpcInterface
• 7 protected functions inherited from QObject
• 2 protected variables inherited from QObject

Detailed Description

The QUsbStorageGadget class is used to enable mass storage class of USB gadgets.

The QUsbStorageGadget class is used to configure the USB gadget hardware as a USB mass storage device.

The following code will export the block device, /dev/sda.

    QUsbStorageGadget *storage = QUsbStorageGadget;
    if (gadget->available()) {
        connect(gadget, SIGNAL(activated()), this, SLOT(storageActivated()));
        gadget->setBackingStore(QStringList() << "/dev/sda");
        gadget->activate();
    }

Warning: Filesystem drivers in most operating systems expect exclusive access to the underlying block device. Any modification to the on disk data structures that do not go through the filesystem layer can result in data losses and system crashes. Therefore it is important that the backing store block devices are unmounted prior to activating the USB storage gadget.

See also QUsbManager and UsbGadgetTask.

Member Function Documentation

QUsbStorageGadget::QUsbStorageGadget ( const QString & group = QString(), QObject * parent = 0, QAbstractIpcInterface::Mode mode = Client )

Constructs a new QUsbStorageGadget object in group and attach it to parent. If mode is Client, then the object is constructed in client mode and group may be empty to indicate that the default group should be used.

void QUsbStorageGadget::addBackingStore ( const QString & path )   [virtual slot]

Adds device path to the list of backing stores.

QStringList QUsbStorageGadget::backingStore () const

Returns the list of devices that will be used as the backing store.

See also setBackingStore().

void QUsbStorageGadget::removeBackingStore ( const QString & path )   [virtual slot]

Removes device path from the list of backing stores.

void QUsbStorageGadget::setBackingStore ( const QStringList & paths )   [virtual slot]

Sets the list of backing store devices to paths.

See also backingStore().