source: trunk/packages/xen-3.1/xen-3.1/tools/python/xen/xend/XendDevices.py @ 34

Last change on this file since 34 was 34, checked in by hartmans, 18 years ago

Add xen and xen-common

File size: 3.1 KB
Line 
1#===========================================================================
2# This library is free software; you can redistribute it and/or
3# modify it under the terms of version 2.1 of the GNU Lesser General Public
4# License as published by the Free Software Foundation.
5#
6# This library is distributed in the hope that it will be useful,
7# but WITHOUT ANY WARRANTY; without even the implied warranty of
8# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
9# Lesser General Public License for more details.
10#
11# You should have received a copy of the GNU Lesser General Public
12# License along with this library; if not, write to the Free Software
13# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
14#============================================================================
15# Copyright (C) 2006 XenSource Ltd
16#============================================================================
17
18#
19# A collection of DevControllers
20#
21
22from xen.xend.server import blkif, netif, tpmif, pciif, iopif, irqif, usbif, vfbif
23from xen.xend.server.BlktapController import BlktapController
24from xen.xend.server.ConsoleController import ConsoleController
25
26
27class XendDevices:
28    """ An ugly halfway point between the module local device name
29    to class map we used to have in XendDomainInfo and something
30    slightly more managable.
31
32    This class should contain all the functions that have to do
33    with managing devices in Xend. Right now it is only a factory
34    function.
35    """
36
37    controllers = {
38        'vbd': blkif.BlkifController,
39        'vif': netif.NetifController,
40        'vtpm': tpmif.TPMifController,
41        'pci': pciif.PciController,
42        'ioports': iopif.IOPortsController,
43        'irq': irqif.IRQController,
44        'usb': usbif.UsbifController,
45        'tap': BlktapController,
46        'vfb': vfbif.VfbifController,
47        'vkbd': vfbif.VkbdifController,
48        'console': ConsoleController,
49    }
50
51    #@classmethod
52    def valid_devices(cls):
53        return cls.controllers.keys()
54    valid_devices = classmethod(valid_devices)
55
56    #@classmethod
57    def make_controller(cls, name, domain):
58        """Factory function to make device controllers per domain.
59
60        @param name: device class name in L{VALID_DEVICES}
61        @type name: String
62        @param domain: domain this controller is handling devices for.
63        @type domain: XendDomainInfo
64        @return: DevController of class 'name' or None
65        @rtype: subclass of DevController
66        """
67        if name in cls.controllers.keys():
68            cls.controllers[name].deviceClass = name
69            return cls.controllers[name](domain)
70        return None
71
72    make_controller = classmethod(make_controller)
73
74    def destroy_device_state(cls, domain):
75        """Destroy the state of (external) devices. This is necessary
76           to do when a VM's configuration is destroyed.
77       
78        @param domain: domain this controller is handling devices for.
79        @type domain: XendDomainInfo
80        """
81        tpmif.destroy_vtpmstate(domain.getName())
82
83    destroy_device_state = classmethod(destroy_device_state)
Note: See TracBrowser for help on using the repository browser.