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contego / home / tvault / .virtenv / lib / python2.7 / site-packages / nova / objects / pci_device.pyc
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cBsÉeZdZdZiejƒd6ejdeƒd6ejƒd6ejƒd6ejƒd6ejƒd6ej	ƒd	6ejdeƒd
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    PCI devices are managed by the compute resource tracker, which discovers
    the devices from the hardware platform, claims, allocates and frees
    devices for instances.

    The PCI device information is permanently maintained in a database.
    This makes it convenient to get PCI device information, like physical
    function for a VF device, adjacent switch IP address for a NIC,
    hypervisor identification for a PCI device, etc. It also provides a
    convenient way to check device allocation information for administrator
    purposes.

    A device can be in available/claimed/allocated/deleted/removed state.

    A device is available when it is discovered..

    A device is claimed prior to being allocated to an instance. Normally the
    transition from claimed to allocated is quick. However, during a resize
    operation the transition can take longer, because devices are claimed in
    prep_resize and allocated in finish_resize.

    A device becomes removed when hot removed from a node (i.e. not found in
    the next auto-discover) but not yet synced with the DB. A removed device
    should not be allocated to any instance, and once deleted from the DB,
    the device object is changed to deleted state and no longer synced with
    the DB.

    Filed notes::

        | 'dev_id':
        |   Hypervisor's identification for the device, the string format
        |   is hypervisor specific
        | 'extra_info':
        |   Device-specific properties like PF address, switch ip address etc.

    s1.5tidtnullabletcompute_node_idtaddresst	vendor_idt
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W|jdƒxh|jƒD]Z\}}||jjƒkrut|||ƒqA|j}|ji||6ƒ||_qAWdS(sÿSync the content from device dictionary to device object.

        The resource tracker updates the available devices periodically.
        To avoid meaningless syncs with the database, we update the device
        object only if a value changed.
        R R#RR%R'N(sstatuss
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		cCs
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cCs+tj|||ƒ}|j||ƒ|ƒS(N(Rtpci_device_get_by_addrR\(tclsRRtdev_addrR[((sL/home/tvault/.virtenv/lib/python2.7/site-packages/nova/objects/pci_device.pytget_by_dev_addrÑscCs(tj||ƒ}|j||ƒ|ƒS(N(Rtpci_device_get_by_idR\(R^RRR[((sL/home/tvault/.virtenv/lib/python2.7/site-packages/nova/objects/pci_device.pyt
get_by_dev_id×scCs2|ƒ}|j|ƒtjj|_||_|S(sÍCreate a PCI device based on hypervisor information.

        As the device object is just created and is not synced with db yet
        thus we should not reset changes here for fields from dict.
        (RMRR;t	AVAILABLER RY(R^RRHRZ((sL/home/tvault/.virtenv/lib/python2.7/site-packages/nova/objects/pci_device.pytcreateÜs
	
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