tree 9b4b427466337bb5712c7d9316c006e9ec2c9cf9
parent dbd328d7e037b1af13fb0f20f3708e2261b9e0b6
author Johnathan Mantey <johnathanx.mantey@intel.com> 1578508738 -0800
committer Johnathan Mantey <johnathanx.mantey@intel.com> 1581627598 -0800

Enable the network link carrier state to be reported.

This change allows networkd to keep track of, and report, the state of
the network carrier signal. When a NIC cable is pulled, or inserted, a
DBus client is able identify the condition.

Tested:
ip link set down dev eth0  # take eth0 down
Get bmc/EthernetInterfaces/eth0 from Redfish # LinkStatus = LinkDown
                                             # InterfaceEnabled = false
ip link set up dev eth0    # bring eth0 back
Get bmc/EthernetInterfaces/eth0 from Redfish # LinkStatus = Linkup
                                             # InterfaceEnabled = true
Pull eth0 cable
Get bmc/EthernetInterfaces/eth0 from Redfish # LinkStatus = LinkDown
                                             # InterfaceEnabled = true
Insert eth0 cable
Get bmc/EthernetInterfaces/eth0 from Redfish # LinkStatus = Linkup
                                             # InterfaceEnabled = true

Change-Id: I5530cf7882cfbfdba1436dd34b3219c735047c5e
Signed-off-by: Johnathan Mantey <johnathanx.mantey@intel.com>