Add NodeDeviceParser module for parsing libvirt host device xml,
associated helper functions and tests.
Thanks,
Cole
# HG changeset patch
# User Cole Robinson <crobinso@xxxxxxxxxx>
# Node ID 391354aef31a1a8e21e43ba3799af3a79c69985e
# Parent 9f02b1bb16e2d47088ab928ccc1ba2a59d26d1c8
Add NodeDeviceParser module for parsing libvirt host device xml.
diff -r 9f02b1bb16e2 -r 391354aef31a tests/__init__.py
--- a/tests/__init__.py Sun Mar 01 21:19:29 2009 -0500
+++ b/tests/__init__.py Sun Mar 01 21:29:18 2009 -0500
@@ -70,4 +70,5 @@
import storage
import urltest
import clonetest
+import nodedev
diff -r 9f02b1bb16e2 -r 391354aef31a tests/nodedev-xml/nodexml/net1.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/nodedev-xml/nodexml/net1.xml Sun Mar 01 21:29:18 2009 -0500
@@ -0,0 +1,9 @@
+<device>
+ <name>net_00_1c_25_10_b1_e4</name>
+ <parent>pci_8086_1049</parent>
+ <capability type='net'>
+ <interface>eth0</interface>
+ <address>00:1c:25:10:b1:e4</address>
+ <capability type='80203'/>
+ </capability>
+</device>
diff -r 9f02b1bb16e2 -r 391354aef31a tests/nodedev-xml/nodexml/net2.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/nodedev-xml/nodexml/net2.xml Sun Mar 01 21:29:18 2009 -0500
@@ -0,0 +1,9 @@
+<device>
+ <name>net_00_1c_bf_04_29_a4</name>
+ <parent>pci_8086_4227</parent>
+ <capability type='net'>
+ <interface>wlan0</interface>
+ <address>00:1c:bf:04:29:a4</address>
+ <capability type='80211'/>
+ </capability>
+</device>
diff -r 9f02b1bb16e2 -r 391354aef31a tests/nodedev-xml/nodexml/pci1.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/nodedev-xml/nodexml/pci1.xml Sun Mar 01 21:29:18 2009 -0500
@@ -0,0 +1,12 @@
+<device>
+ <name>pci_1180_592</name>
+ <parent>pci_8086_2448</parent>
+ <capability type='pci'>
+ <domain>0</domain>
+ <bus>21</bus>
+ <slot>0</slot>
+ <function>4</function>
+ <product id='0x0592'>R5C592 Memory Stick Bus Host Adapter</product>
+ <vendor id='0x1180'>Ricoh Co Ltd</vendor>
+ </capability>
+</device>
diff -r 9f02b1bb16e2 -r 391354aef31a tests/nodedev-xml/nodexml/pci2.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/nodedev-xml/nodexml/pci2.xml Sun Mar 01 21:29:18 2009 -0500
@@ -0,0 +1,12 @@
+<device>
+ <name>pci_8086_1049</name>
+ <parent>computer</parent>
+ <capability type='pci'>
+ <domain>0</domain>
+ <bus>0</bus>
+ <slot>25</slot>
+ <function>0</function>
+ <product id='0x1049'>82566MM Gigabit Network Connection</product>
+ <vendor id='0x8086'>Intel Corporation</vendor>
+ </capability>
+</device>
diff -r 9f02b1bb16e2 -r 391354aef31a tests/nodedev-xml/nodexml/scsibus.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/nodedev-xml/nodexml/scsibus.xml Sun Mar 01 21:29:18 2009 -0500
@@ -0,0 +1,7 @@
+<device>
+ <name>usb_device_781_5151_2004453082054CA1BEEE_if0_scsi_host_0</name>
+ <parent>usb_device_781_5151_2004453082054CA1BEEE_if0</parent>
+ <capability type='scsi_host'>
+ <host>5</host>
+ </capability>
+</device>
diff -r 9f02b1bb16e2 -r 391354aef31a tests/nodedev-xml/nodexml/scsidev.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/nodedev-xml/nodexml/scsidev.xml Sun Mar 01 21:29:18 2009 -0500
@@ -0,0 +1,11 @@
+<device>
+ <name>usb_device_781_5151_2004453082054CA1BEEE_if0_scsi_host_0_scsi_device_lun0</name>
+ <parent>usb_device_781_5151_2004453082054CA1BEEE_if0_scsi_host_0</parent>
+ <capability type='scsi'>
+ <host>5</host>
+ <bus>0</bus>
+ <target>0</target>
+ <lun>0</lun>
+ <type>disk</type>
+ </capability>
+</device>
diff -r 9f02b1bb16e2 -r 391354aef31a tests/nodedev-xml/nodexml/storage1.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/nodedev-xml/nodexml/storage1.xml Sun Mar 01 21:29:18 2009 -0500
@@ -0,0 +1,12 @@
+<device>
+ <name>storage_serial_SATA_WDC_WD1600AAJS__WD_WCAP95119685</name>
+ <parent>pci_8086_27c0_scsi_host_scsi_device_lun0</parent>
+ <capability type='storage'>
+ <block>/dev/sda</block>
+ <bus>scsi</bus>
+ <drive_type>disk</drive_type>
+ <model>WDC WD1600AAJS-2</model>
+ <vendor>ATA</vendor>
+ <size>160041885696</size>
+ </capability>
+</device>
diff -r 9f02b1bb16e2 -r 391354aef31a tests/nodedev-xml/nodexml/storage2.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/nodedev-xml/nodexml/storage2.xml Sun Mar 01 21:29:18 2009 -0500
@@ -0,0 +1,16 @@
+<device>
+ <name>storage_serial_SanDisk_Cruzer_Micro_2004453082054CA1BEEE_0_0</name>
+ <parent>usb_device_781_5151_2004453082054CA1BEEE_if0_scsi_host_0_scsi_device_lun0</parent>
+ <capability type='storage'>
+ <block>/dev/sdb</block>
+ <bus>usb</bus>
+ <drive_type>disk</drive_type>
+ <model>Cruzer Micro</model>
+ <vendor>SanDisk</vendor>
+ <capability type='removable'>
+ <media_available>1</media_available>
+ <media_size>12345678</media_size>
+ </capability>
+ <capability type='hotpluggable' />
+ </capability>
+</device>
diff -r 9f02b1bb16e2 -r 391354aef31a tests/nodedev-xml/nodexml/system.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/nodedev-xml/nodexml/system.xml Sun Mar 01 21:29:18 2009 -0500
@@ -0,0 +1,17 @@
+<device>
+ <name>computer</name>
+ <capability type='system'>
+ <hardware>
+ <vendor>LENOVO</vendor>
+ <version>ThinkPad T61</version>
+ <serial>L3B2616</serial>
+ <uuid>97e80381-494f-11cb-8e0e-cbc168f7d753</uuid>
+ </hardware>
+ <firmware>
+ <vendor>LENOVO</vendor>
+ <version>7LET51WW (1.21 )</version>
+ <release_date>08/22/2007</release_date>
+ </firmware>
+ </capability>
+</device>
+
diff -r 9f02b1bb16e2 -r 391354aef31a tests/nodedev-xml/nodexml/usbbus.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/nodedev-xml/nodexml/usbbus.xml Sun Mar 01 21:29:18 2009 -0500
@@ -0,0 +1,10 @@
+<device>
+ <name>usb_device_781_5151_2004453082054CA1BEEE_if0</name>
+ <parent>usb_device_781_5151_2004453082054CA1BEEE</parent>
+ <capability type='usb'>
+ <number>0</number>
+ <class>8</class>
+ <subclass>6</subclass>
+ <protocol>80</protocol>
+ </capability>
+</device>
diff -r 9f02b1bb16e2 -r 391354aef31a tests/nodedev-xml/nodexml/usbdev1.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/nodedev-xml/nodexml/usbdev1.xml Sun Mar 01 21:29:18 2009 -0500
@@ -0,0 +1,10 @@
+<device>
+ <name>usb_device_781_5151_2004453082054CA1BEEE</name>
+ <parent>usb_device_1d6b_2_0000_00_1a_7</parent>
+ <capability type='usb_device'>
+ <bus>1</bus>
+ <device>4</device>
+ <product id='0x5151'>Cruzer Micro 256/512MB Flash Drive</product>
+ <vendor id='0x0781'>SanDisk Corp.</vendor>
+ </capability>
+</device>
diff -r 9f02b1bb16e2 -r 391354aef31a tests/nodedev-xml/nodexml/usbdev2.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/nodedev-xml/nodexml/usbdev2.xml Sun Mar 01 21:29:18 2009 -0500
@@ -0,0 +1,10 @@
+<device>
+ <name>usb_device_483_2016_noserial</name>
+ <parent>usb_device_1d6b_1_0000_00_1a_0</parent>
+ <capability type='usb_device'>
+ <bus>3</bus>
+ <device>3</device>
+ <product id='0x2016'>Fingerprint Reader</product>
+ <vendor id='0x0483'>SGS Thomson Microelectronics</vendor>
+ </capability>
+</device>
diff -r 9f02b1bb16e2 -r 391354aef31a tests/nodedev.py
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/nodedev.py Sun Mar 01 21:29:18 2009 -0500
@@ -0,0 +1,154 @@
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+# MA 02110-1301 USA.
+
+import os.path
+import unittest
+import virtinst.NodeDeviceParser as nodeparse
+import libvirt
+
+conn = libvirt.open("test:///default")
+
+class TestNodeDev(unittest.TestCase):
+
+ def _nodeDevFromFile(self, filename):
+ xml = file(os.path.join("tests/nodedev-xml/nodexml", filename)).read()
+ return nodeparse.parse(xml)
+
+ def _testCompare(self, filename, vals):
+ dev = self._nodeDevFromFile(filename)
+
+ for attr in vals.keys():
+ self.assertEqual(vals[attr], getattr(dev, attr))
+
+ def testSystemDevice(self):
+ filename = "system.xml"
+ vals = {"hw_vendor": "LENOVO", "hw_version": "ThinkPad T61",
+ "hw_serial": "L3B2616",
+ "hw_uuid": "97e80381-494f-11cb-8e0e-cbc168f7d753",
+ "fw_vendor": "LENOVO", "fw_version": "7LET51WW (1.21 )",
+ "fw_date": "08/22/2007",
+ "device_type": nodeparse.CAPABILITY_TYPE_SYSTEM,
+ "name": "computer", "parent": None}
+ self._testCompare(filename, vals)
+
+ def testNetDevice1(self):
+ filename = "net1.xml"
+ vals = {"name": "net_00_1c_25_10_b1_e4", "parent": "pci_8086_1049",
+ "device_type": nodeparse.CAPABILITY_TYPE_NET,
+ "interface": "eth0", "address": "00:1c:25:10:b1:e4",
+ "capability_type": "80203"}
+ self._testCompare(filename, vals)
+
+ def testNetDevice2(self):
+ filename = "net2.xml"
+ vals = {"name": "net_00_1c_bf_04_29_a4", "parent": "pci_8086_4227",
+ "device_type": nodeparse.CAPABILITY_TYPE_NET,
+ "interface": "wlan0", "address": "00:1c:bf:04:29:a4",
+ "capability_type": "80211"}
+ self._testCompare(filename, vals)
+
+ def testPCIDevice1(self):
+ filename = "pci1.xml"
+ vals = {"name": "pci_1180_592", "parent": "pci_8086_2448",
+ "device_type": nodeparse.CAPABILITY_TYPE_PCI,
+ "domain": "0", "bus": "21", "slot": "0", "function": "4",
+ "product_id": "0x0592", "vendor_id": "0x1180",
+ "product_name": "R5C592 Memory Stick Bus Host Adapter",
+ "vendor_name": "Ricoh Co Ltd",}
+ self._testCompare(filename, vals)
+
+ def testPCIDevice2(self):
+ filename = "pci2.xml"
+ vals = {"name": "pci_8086_1049", "parent": "computer",
+ "device_type": nodeparse.CAPABILITY_TYPE_PCI,
+ "domain": "0", "bus": "0", "slot": "25", "function": "0",
+ "product_id": "0x1049", "vendor_id": "0x8086",
+ "product_name": "82566MM Gigabit Network Connection",
+ "vendor_name": "Intel Corporation",}
+ self._testCompare(filename, vals)
+
+ def testUSBDevDevice1(self):
+ filename = "usbdev1.xml"
+ vals = {"name": "usb_device_781_5151_2004453082054CA1BEEE",
+ "parent": "usb_device_1d6b_2_0000_00_1a_7",
+ "device_type": nodeparse.CAPABILITY_TYPE_USBDEV,
+ "bus": "1", "device": "4", "product_id": '0x5151',
+ "vendor_id": '0x0781',
+ "vendor_name": "SanDisk Corp.",
+ "product_name": "Cruzer Micro 256/512MB Flash Drive" }
+ self._testCompare(filename, vals)
+
+ def testUSBDevDevice2(self):
+ filename = "usbdev2.xml"
+ vals = {"name": "usb_device_483_2016_noserial",
+ "parent": "usb_device_1d6b_1_0000_00_1a_0",
+ "device_type": nodeparse.CAPABILITY_TYPE_USBDEV,
+ "bus": "3", "device": "3", "product_id": '0x2016',
+ "vendor_id": '0x0483',
+ "vendor_name": "SGS Thomson Microelectronics",
+ "product_name": "Fingerprint Reader" }
+ self._testCompare(filename, vals)
+
+ def testStorageDevice1(self):
+ filename = "storage1.xml"
+ vals = {"name": "storage_serial_SATA_WDC_WD1600AAJS__WD_WCAP95119685",
+ "parent": "pci_8086_27c0_scsi_host_scsi_device_lun0",
+ "device_type": nodeparse.CAPABILITY_TYPE_STORAGE,
+ "block": "/dev/sda", "bus": "scsi", "drive_type": "disk",
+ "model": "WDC WD1600AAJS-2", "vendor": "ATA",
+ "size": 160041885696, "removable": False,
+ "hotpluggable": False, "media_available": False,
+ "media_size": 0}
+ self._testCompare(filename, vals)
+
+ def testStorageDevice2(self):
+ filename = "storage2.xml"
+ vals = {"name": "storage_serial_SanDisk_Cruzer_Micro_2004453082054CA1BEEE_0_0",
+ "parent": "usb_device_781_5151_2004453082054CA1BEEE_if0_scsi_host_0_scsi_device_lun0",
+ "device_type": nodeparse.CAPABILITY_TYPE_STORAGE,
+ "block": "/dev/sdb", "bus": "usb", "drive_type": "disk",
+ "model": "Cruzer Micro", "vendor": "SanDisk", "size": 0,
+ "removable": True, "hotpluggable": True,
+ "media_available": True, "media_size": 12345678}
+ self._testCompare(filename, vals)
+
+ def testUSBBus(self):
+ filename = "usbbus.xml"
+ vals = {"name": "usb_device_781_5151_2004453082054CA1BEEE_if0",
+ "parent": "usb_device_781_5151_2004453082054CA1BEEE",
+ "device_type": nodeparse.CAPABILITY_TYPE_USBBUS,
+ "number": "0", "classval": "8", "subclass": "6",
+ "protocol": "80"}
+ self._testCompare(filename, vals)
+
+ def testSCSIBus(self):
+ filename = "scsibus.xml"
+ vals = {"name": "usb_device_781_5151_2004453082054CA1BEEE_if0_scsi_host_0",
+ "parent": "usb_device_781_5151_2004453082054CA1BEEE_if0",
+ "device_type": nodeparse.CAPABILITY_TYPE_SCSIBUS,
+ "host": "5"}
+ self._testCompare(filename, vals)
+
+ def testSCSIDevice(self):
+ filename = "scsidev.xml"
+ vals = {"name": "usb_device_781_5151_2004453082054CA1BEEE_if0_scsi_host_0_scsi_device_lun0",
+ "parent": "usb_device_781_5151_2004453082054CA1BEEE_if0_scsi_host_0",
+ "host": "5", "bus": "0", "target": "0", "lun": "0",
+ "type": "disk"}
+ self._testCompare(filename, vals)
+
+if __name__ == "__main__":
+ unittest.main()
diff -r 9f02b1bb16e2 -r 391354aef31a virtinst/NodeDeviceParser.py
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/virtinst/NodeDeviceParser.py Sun Mar 01 21:29:18 2009 -0500
@@ -0,0 +1,421 @@
+#
+# Copyright 2009 Red Hat, Inc.
+# Cole Robinson <crobinso@xxxxxxxxxx>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+# MA 02110-1301 USA.
+
+import libxml2
+import libvirt
+from virtinst import _virtinst as _
+
+# class USBDevice
+
+CAPABILITY_TYPE_SYSTEM = "system"
+CAPABILITY_TYPE_NET = "net"
+CAPABILITY_TYPE_PCI = "pci"
+CAPABILITY_TYPE_USBDEV = "usb_device"
+CAPABILITY_TYPE_USBBUS = "usb"
+CAPABILITY_TYPE_STORAGE = "storage"
+CAPABILITY_TYPE_SCSIBUS = "scsi_host"
+CAPABILITY_TYPE_SCSIDEV = "scsi"
+
+class NodeDevice(object):
+ def __init__(self, node):
+ self.name = None
+ self.parent = None
+ self.device_type = None
+
+ self._parseNodeXML(node)
+
+ def getVirtualHostDevice(self, conn):
+ """
+ Convert this NodeDevice to a VirtualHostDevice for attaching to a
+ guest.
+
+ @param conn: connection to pass to the VirtualHostDevice instance
+ @type conn: libvirt.virConnect
+
+ @rtype: L{virtinst.VirtualHostDevice}
+ """
+ raise ValueError(_("Node device type '%s' cannot be "
+ "attached.") % self.device_type)
+
+ def _parseNodeXML(self, node):
+ child = node.children
+ while child:
+ if child.name == "name":
+ self.name = child.content
+ elif child.name == "parent":
+ self.parent = child.content
+ elif child.name == "capability":
+ self.device_type = child.prop("type")
+ child = child.next
+
+ def _getCapabilityNode(self, node):
+ child = node.children
+ while child:
+ if child.name == "capability":
+ return child
+ child = child.next
+ return None
+
+ def _parseValueHelper(self, node, value_map):
+ if value_map.has_key(node.name):
+ setattr(self, value_map[node.name], node.content)
+
+ def _parseHelper(self, main_node, value_map):
+ node = main_node.children
+ while node:
+ self._parseValueHelper(node, value_map)
+ node = node.next
+
+class SystemDevice(NodeDevice):
+ def __init__(self, node):
+ NodeDevice.__init__(self, node)
+
+ self.hw_vendor = None
+ self.hw_version = None
+ self.hw_serial = None
+ self.hw_uuid = None
+
+ self.fw_vendor = None
+ self.fw_version = None
+ self.fw_date = None
+
+ self.parseXML(self._getCapabilityNode(node))
+
+ def parseXML(self, node):
+ child = node.children
+ hardware_map = {"vendor": "hw_vendor",
+ "version": "hw_version",
+ "serial": "hw_serial",
+ "uuid": "hw_uuid"}
+ firmware_map = {"vendor": "fw_vendor",
+ "version": "fw_version",
+ "release_date": "fw_date" }
+ while child:
+ if child.name == "hardware":
+ self._parseHelper(child, hardware_map)
+ elif child.name == "firmware":
+ self._parseHelper(child, firmware_map)
+ child = child.next
+
+class NetDevice(NodeDevice):
+ def __init__(self, node):
+ NodeDevice.__init__(self, node)
+
+ self.interface = None
+ self.address = None
+ self.capability_type = None
+
+ self.parseXML(self._getCapabilityNode(node))
+
+ def parseXML(self, node):
+ value_map = { "interface" : "interface",
+ "address" : "address", }
+ child = node.children
+ while child:
+ if child.name == "capability":
+ self.capability_type = child.prop("type")
+ else:
+ self._parseValueHelper(child, value_map)
+ child = child.next
+
+class PCIDevice(NodeDevice):
+ def __init__(self, node):
+ NodeDevice.__init__(self, node)
+
+ self.domain = None
+ self.bus = None
+ self.slot = None
+ self.function = None
+
+ self.product_id = None
+ self.product_name = None
+ self.vendor_id = None
+ self.vendor_name = None
+
+ self.parseXML(self._getCapabilityNode(node))
+
+ def parseXML(self, node):
+ val_map = { "domain" : "domain",
+ "bus" : "bus",
+ "slot" : "slot",
+ "function" : "function" }
+ child = node.children
+ while child:
+ if child.name == "vendor":
+ self.vendor_name = child.content
+ self.vendor_id = child.prop("id")
+
+ elif child.name == "product":
+ self.product_name = child.content
+ self.product_id = child.prop("id")
+
+ else:
+ self._parseValueHelper(child, val_map)
+
+ child = child.next
+
+class USBDevice(NodeDevice):
+ def __init__(self, node):
+ NodeDevice.__init__(self, node)
+
+ self.bus = None
+ self.device = None
+
+ self.product_id = None
+ self.product_name = None
+ self.vendor_id = None
+ self.vendor_name = None
+
+ self.parseXML(self._getCapabilityNode(node))
+
+ def parseXML(self, node):
+ val_map = { "bus": "bus", "device": "device"}
+ child = node.children
+ while child:
+ if child.name == "vendor":
+ self.vendor_name = child.content
+ self.vendor_id = child.prop("id")
+
+ elif child.name == "product":
+ self.product_name = child.content
+ self.product_id = child.prop("id")
+
+ else:
+ self._parseValueHelper(child, val_map)
+
+ child = child.next
+
+class StorageDevice(NodeDevice):
+ def __init__(self, node):
+ NodeDevice.__init__(self, node)
+
+ self.block = None
+ self.bus = None
+ # FIXME: Map this to virtinst.device?
+ self.drive_type = None
+ self.size = 0
+
+ self.model = None
+ self.vendor = None
+
+ self.removable = False
+ self.media_available = False
+ self.media_size = 0
+
+ self.hotpluggable = False
+
+ self.parseXML(self._getCapabilityNode(node))
+
+ def parseXML(self, node):
+ val_map = { "block" : "block",
+ "bus" : "bus",
+ "drive_type" : "drive_type",
+ "model" : "model",
+ "vendor" : "vendor"}
+ child = node.children
+ while child:
+ if child.name == "size":
+ self.size = int(child.content)
+ elif child.name == "capability":
+
+ captype = child.prop("type")
+ if captype == "hotpluggable":
+ self.hotpluggable = True
+ elif captype == "removable":
+ self.removable = True
+ rmchild = child.children
+ while rmchild:
+ if rmchild.name == "media_available":
+ self.media_available = bool(int(rmchild.content))
+ elif rmchild.name == "media_size":
+ self.media_size = int(rmchild.content)
+ rmchild = rmchild.next
+ else:
+ self._parseValueHelper(child, val_map)
+
+ child = child.next
+
+class USBBus(NodeDevice):
+ def __init__(self, node):
+ NodeDevice.__init__(self, node)
+
+ self.number = None
+ self.classval = None
+ self.subclass = None
+ self.protocol = None
+
+ self.parseXML(self._getCapabilityNode(node))
+
+ def parseXML(self, node):
+ val_map = { "number" : "number",
+ "class" : "classval",
+ "subclass" : "subclass",
+ "protocol" : "protocol" }
+ self._parseHelper(node, val_map)
+
+class SCSIDevice(NodeDevice):
+ def __init__(self, node):
+ NodeDevice.__init__(self, node)
+
+ self.host = None
+ self.bus = None
+ self.target = None
+ self.lun = None
+ self.disk = None
+
+ self.parseXML(self._getCapabilityNode(node))
+
+ def parseXML(self, node):
+ val_map = { "host" : "host",
+ "bus" : "bus",
+ "target": "target",
+ "lun" : "lun",
+ "type" : "type"}
+ self._parseHelper(node, val_map)
+
+class SCSIBus(NodeDevice):
+ def __init__(self, node):
+ NodeDevice.__init__(self, node)
+
+ self.host = None
+
+ self.parseXML(self._getCapabilityNode(node))
+
+ def parseXML(self, node):
+ val_map = { "host" : "host" }
+ self._parseHelper(node, val_map)
+
+
+def is_nodedev_capable(conn):
+ """
+ Check if the passed libvirt connection supports host device routines
+
+ @param conn: Connection to check
+ @type conn: libvirt.virConnect
+
+ @rtype: C{bool}
+ """
+ if not conn:
+ return False
+ if not isinstance(conn, libvirt.virConnect):
+ raise ValueError(_("'conn' must be a virConnect instance."))
+
+ if dir(libvirt).count("virNodeDevice") == 0:
+ # Local libvirt doesn't support it
+ return False
+
+ try:
+ conn.listDevices(None, 0)
+ return True
+ except Exception, e:
+ if (e.get_error_code() == libvirt.VIR_ERR_RPC or
+ e.get_error_code() == libvirt.VIR_ERR_NO_SUPPORT):
+ return False
+
+ return True
+
+def lookupNodeName(conn, name):
+ """
+ Convert the passed libvirt node device name to a NodeDevice
+ instance, with proper error reporting.
+
+ @param conn: libvirt.virConnect instance to perform the lookup on
+ @param name: libvirt node device name to lookup
+
+ @rtype: L{NodeDevice} instance
+ """
+
+ if not is_nodedev_capable(conn):
+ raise ValueError(_("Connection does not support host device "
+ "enumeration."))
+
+ nodedev = conn.nodeDeviceLookupByName(name)
+ xml = nodedev.XMLDesc(0)
+ return parse(xml)
+
+
+def parse(xml):
+ """
+ Convert the passed libvirt node device xml into a NodeDevice object
+
+ @param xml: libvirt node device xml
+ @type xml: C{str}
+
+ @returns: L{NodeDevice} instance
+ """
+
+ class ErrorHandler:
+ def __init__(self):
+ self.msg = ""
+ def handler(self, ignore, s):
+ self.msg += s
+ error = ErrorHandler()
+ libxml2.registerErrorHandler(error.handler, None)
+
+ try:
+ # try/except/finally is only available in python-2.5
+ try:
+ doc = libxml2.readMemory(xml, len(xml),
+ None, None,
+ libxml2.XML_PARSE_NOBLANKS)
+ except (libxml2.parserError, libxml2.treeError), e:
+ raise ValueError("%s\n%s" % (e, error.msg))
+ finally:
+ libxml2.registerErrorHandler(None, None)
+
+ try:
+ root = doc.getRootElement()
+ if root.name != "device":
+ raise ValueError("Root element is not 'device'")
+
+ t = _findNodeType(root)
+ devclass = _typeToDeviceClass(t)
+ device = devclass(root)
+ finally:
+ doc.freeDoc()
+
+ return device
+
+def _findNodeType(node):
+ child = node.children
+ while child:
+ if child.name == "capability":
+ return child.prop("type")
+ child = child.next
+ return None
+
+def _typeToDeviceClass(t):
+ if t == CAPABILITY_TYPE_SYSTEM:
+ return SystemDevice
+ elif t == CAPABILITY_TYPE_NET:
+ return NetDevice
+ elif t == CAPABILITY_TYPE_PCI:
+ return PCIDevice
+ elif t == CAPABILITY_TYPE_USBDEV:
+ return USBDevice
+ elif t == CAPABILITY_TYPE_USBBUS:
+ return USBBus
+ elif t == CAPABILITY_TYPE_STORAGE:
+ return StorageDevice
+ elif t == CAPABILITY_TYPE_SCSIBUS:
+ return SCSIBus
+ elif t == CAPABILITY_TYPE_SCSIDEV:
+ return SCSIDevice
+
+ raise ValueError(_("Unknown host device capability '%s'.") % t)
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