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#!/usr/bin/python -u
#
# Copyright 2016 IBM Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import sys
import os
import dbus
import uuid
import argparse
import subprocess
import obmc.mapper
import shutil
INV_INTF_NAME = 'xyz.openbmc_project.Inventory.Item.NetworkInterface'
NET_DBUS_NAME = 'org.openbmc.NetworkManager'
NET_OBJ_NAME = '/org/openbmc/NetworkManager/Interface'
CHS_DBUS_NAME = 'org.openbmc.control.Chassis'
CHS_INTF_NAME = 'xyz.openbmc_project.Common.UUID'
CHS_OBJ_NAME = '/org/openbmc/control/chassis0'
PROP_INTF_NAME = 'org.freedesktop.DBus.Properties'
INVENTORY_ROOT = '/xyz/openbmc_project/inventory'
NETWORK_ROOT = '/xyz/openbmc_project/network'
ETHERNET_INTF_NAME = 'xyz.openbmc_project.Network.EthernetInterface'
MAC_INTF_NAME = 'xyz.openbmc_project.Network.MACAddress'
FRUS = {}
# IEEE 802 MAC address mask for locally administered.
# This means the admin has set the MAC and is no longer
# the unique number set by the device manufacturer.
MAC_LOCALLY_ADMIN_MASK = 0x20000000000
# Get inventory MACAddress value.
def get_bmc_mac_address(bus, prop):
mapper = obmc.mapper.Mapper(bus)
# Get the inventory subtree, limited
# to objects that implement NetworkInterface.
for path, info in \
mapper.get_subtree(
path=INVENTORY_ROOT,
interfaces=[INV_INTF_NAME]).iteritems():
# Find a NetworkInterface with 'bmc' in the path.
if 'bmc' not in path:
continue
# Only expecting a single service to implement
# NetworkInterface. Get the service connection
# from the mapper response
conn = info.keys()[0]
# Get the inventory object implementing NetworkInterface.
obj = bus.get_object(conn, path)
# Get the MAC address
mproxy = obj.get_dbus_method('Get', PROP_INTF_NAME)
return mproxy(INV_INTF_NAME, prop)
# Get Network Interface object.
def get_network_interface_object(bus):
mapper = obmc.mapper.Mapper(bus)
# Get the network subtree, limited
# to objects that implements EthernetInterface.
for path, info in \
mapper.get_subtree(
path=NETWORK_ROOT,
interfaces=[ETHERNET_INTF_NAME]).iteritems():
# Find the one which is having physical interface,it may happen
# that vlan interface is there and we want the physical
# interface here.
if path.split('/')[-1].find('_') < 0:
service = info.keys()[0]
net_obj = bus.get_object(service, path)
return net_obj
# Get inventory UUID value.
def get_uuid(bus, prop):
mapper = obmc.mapper.Mapper(bus)
# Get the inventory subtree, limited
# to objects that implement UUID.
resp = mapper.get_subtree(
path=INVENTORY_ROOT,
interfaces=[CHS_INTF_NAME])
# Only expecting a single object to implement UUID.
try:
path, info = resp.items()[0]
except IndexError as e:
return None
# Only expecting a single service to implement
# UUID. Get the service connection
# from the mapper response
conn = info.keys()[0]
# Get the inventory object implementing UUID.
obj = bus.get_object(conn, path)
# Get the uuid
mproxy = obj.get_dbus_method('Get', PROP_INTF_NAME)
return mproxy(CHS_INTF_NAME, prop)
# Get the value of the mac on the system (from u-boot) without ':' separators
def get_sys_mac(obj):
sys_mac = ''
try:
sys_mac = subprocess.check_output(["fw_printenv", "-n", "ethaddr"])
except Exception:
# Handle when mac does not exist in u-boot
return sys_mac
return sys_mac
# Replace the value of the system mac with the value of the inventory
# MAC if the system MAC is not locally administered because this means
# the system admin has purposely set the MAC
def sync_mac(obj, inv_mac, sys_mac):
if sys_mac:
# Convert sys MAC to int to perform bitwise '&'
sys_mac = sys_mac.replace(":", "")
int_sys_mac = int(sys_mac, 16)
else:
# Set mac to 0 for when u-boot mac is not present
int_sys_mac = 0
if not int_sys_mac & MAC_LOCALLY_ADMIN_MASK:
# Sys MAC is not locally administered, go replace it with inv value
intf = dbus.Interface(obj, dbus.PROPERTIES_IFACE)
intf.Set(MAC_INTF_NAME, "MACAddress", inv_mac)
# Set sys uuid, this reboots the BMC for the value to take effect
def set_sys_uuid(uuid):
rc = subprocess.call(["fw_setenv", "uuid", uuid])
if rc == 0:
print "Rebooting BMC to set uuid"
# TODO Uncomment once sync from u-boot to /etc/machine-id is in place
# Issue openbmc/openbmc#479
# rc = subprocess.call(["reboot"])
else:
print "Error setting uuid"
if __name__ == '__main__':
arg = argparse.ArgumentParser()
arg.add_argument('-p')
arg.add_argument('-s')
opt = arg.parse_args()
prop_name = opt.p
sync_type = opt.s
bus = dbus.SystemBus()
if sync_type == "mac":
inv_mac = get_bmc_mac_address(bus, prop_name)
if not inv_mac:
sys.exit(1)
net_obj = get_network_interface_object(bus)
if not net_obj:
print "Unable to get the network object"
sys.exit(1)
sys_mac = get_sys_mac(net_obj)
if inv_mac != sys_mac:
print "Inventory MAC=%s,System MAC=%s" % (inv_mac, sys_mac)
sync_mac(net_obj, inv_mac, sys_mac)
elif sync_type == "uuid":
inv_uuid = get_uuid(bus, prop_name)
if inv_uuid:
inv_uuid = uuid.UUID(inv_uuid)
chs_obj = bus.get_object(CHS_DBUS_NAME, CHS_OBJ_NAME)
chs_uuid = get_sys_uuid(chs_obj)
if inv_uuid != sys_uuid:
set_sys_uuid(inv_uuid)
# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4
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