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#
# Copyright 2009, 2013 Red Hat, Inc.
#
# This work is licensed under the GNU GPLv2 or later.
# See the COPYING file in the top-level directory.
import os
import uuid
from .xmlbuilder import XMLBuilder, XMLProperty, XMLChildProperty
def _compare_int(nodedev_val, hostdev_val):
def _intify(val):
try:
if "0x" in str(val):
return int(val or '0x00', 16)
else:
return int(val)
except Exception:
return -1
nodedev_val = _intify(nodedev_val)
hostdev_val = _intify(hostdev_val)
return (nodedev_val == hostdev_val or hostdev_val == -1)
def _compare_uuid(nodedev_val, hostdev_val):
try:
nodedev_val = uuid.UUID(nodedev_val)
hostdev_val = uuid.UUID(hostdev_val)
except Exception: # pragma: no cover
return -1
return (nodedev_val == hostdev_val)
class DevNode(XMLBuilder):
XML_NAME = "devnode"
node_type = XMLProperty("./@type")
path = XMLProperty(".")
class NodeDevice(XMLBuilder):
CAPABILITY_TYPE_NET = "net"
CAPABILITY_TYPE_PCI = "pci"
CAPABILITY_TYPE_USBDEV = "usb_device"
CAPABILITY_TYPE_STORAGE = "storage"
CAPABILITY_TYPE_SCSIBUS = "scsi_host"
CAPABILITY_TYPE_SCSIDEV = "scsi"
CAPABILITY_TYPE_DRM = "drm"
CAPABILITY_TYPE_MDEV = "mdev"
@staticmethod
def lookupNodedevByName(conn, name):
"""
Search the nodedev list cache for a matching name, and return the
result.
:param conn: libvirt.virConnect instance to perform the lookup on
:param conn: nodedev name
:returns: NodeDevice instance
"""
for nodedev in conn.fetch_all_nodedevs():
if nodedev.name == name:
return nodedev
XML_NAME = "device"
# Libvirt can generate bogus 'system' XML:
# https://bugzilla.redhat.com/show_bug.cgi?id=1184131
_XML_SANITIZE = True
name = XMLProperty("./name")
parent = XMLProperty("./parent")
device_type = XMLProperty("./capability/@type")
def get_mdev_uuid(self):
# libvirt 7.3.0 added a <uuid> element to the nodedev xml for mdev
# types. For older versions, we unfortunately have to parse the nodedev
# name, which uses the format "mdev_$UUID_WITH_UNDERSCORES"
if self.uuid is not None:
return self.uuid
return self.name[5:].replace('_', '-')
def compare_to_hostdev(self, hostdev):
if self.device_type == "pci":
if hostdev.type != "pci":
return False
return (_compare_int(self.domain, hostdev.domain) and
_compare_int(self.bus, hostdev.bus) and
_compare_int(self.slot, hostdev.slot) and
_compare_int(self.function, hostdev.function))
if self.device_type == "usb_device":
if hostdev.type != "usb":
return False
return (_compare_int(self.product_id, hostdev.product) and
_compare_int(self.vendor_id, hostdev.vendor) and
_compare_int(self.bus, hostdev.bus) and
_compare_int(self.device, hostdev.device))
if self.device_type == "mdev":
if hostdev.type != "mdev":
return False
return _compare_uuid(self.get_mdev_uuid(), hostdev.uuid)
return False
########################
# XML helper functions #
########################
def is_pci_sriov(self):
return self._capability_type == "virt_functions"
def is_pci_bridge(self):
return self._capability_type == "pci-bridge"
def is_usb_linux_root_hub(self):
return (self.vendor_id == "0x1d6b" and
self.product_id in ["0x0001", "0x0002", "0x0003"])
def is_drm_render(self):
return self.device_type == "drm" and self.drm_type == "render"
##################
# XML properties #
##################
# type='net' options
interface = XMLProperty("./capability/interface")
# type='pci' options
domain = XMLProperty("./capability/domain")
bus = XMLProperty("./capability/bus")
slot = XMLProperty("./capability/slot")
function = XMLProperty("./capability/function")
product_name = XMLProperty("./capability/product")
vendor_name = XMLProperty("./capability/vendor")
_capability_type = XMLProperty("./capability/capability/@type")
# type='usb' options
device = XMLProperty("./capability/device")
product_id = XMLProperty("./capability/product/@id")
vendor_id = XMLProperty("./capability/vendor/@id")
# type='scsi' options
host = XMLProperty("./capability/host")
target = XMLProperty("./capability/target")
lun = XMLProperty("./capability/lun")
# type='storage' options
block = XMLProperty("./capability/block")
drive_type = XMLProperty("./capability/drive_type")
media_label = XMLProperty(
"./capability/capability[@type='removable']/media_label")
media_available = XMLProperty(
"./capability/capability[@type='removable']/media_available",
is_int=True)
# type='drm' options
drm_type = XMLProperty("./capability/type")
devnodes = XMLChildProperty(DevNode)
def get_devnode(self, parent="by-path"):
for d in self.devnodes:
paths = d.path.split(os.sep)
if len(paths) > 2 and paths[-2] == parent:
return d
if len(self.devnodes) > 0:
return self.devnodes[0]
# type='mdev' options
type_id = XMLProperty("./capability/type/@id")
uuid = XMLProperty("./capability/uuid")
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