hyp-nw-mgr: Add support for hypervisor nw config

[asmithakarun]

• ibm/hyp-nw-mgr: Add ip objects for ethernet intf

In this commit, ip address dbus objects are created under the hypervisor network service.

busctl tree xyz.openbmc_project.Network.Hypervisor └─/xyz
└─/xyz/openbmc_project
└─/xyz/openbmc_project/network
└─/xyz/openbmc_project/network/hypervisor
├─/xyz/openbmc_project/network/hypervisor/config
├─/xyz/openbmc_project/network/hypervisor/eth0
│ └─/xyz/openbmc_project/network/hypervisor/eth0/ipv4
│ └─/xyz/openbmc_project/network/hypervisor/eth0/ipv4/addr0
└─/xyz/openbmc_project/network/hypervisor/eth1
└─/xyz/openbmc_project/network/hypervisor/eth1/ipv4
└─/xyz/openbmc_project/network/hypervisor/eth1/ipv4/addr0

The values for the properties of IP interfaces will be initialized by parsing the bios table.

• ibm/hyp-nw-mgr: IP create, delete & sync with bios

This commit adds:

1. support for creation and deletion of an ip address object
2. update the bios table as and when there is a change in the dbus object

• ibm/hyp-nw-mgr: Sync BIOStable with hypervisor app

This change would listen on the properties changed signal on BaseBIOSTable property of bios config manager. Whenever there is a signal, the change would be updated on the corresponding ethernet and ip address dbus objects.

• ibm/hyp-nw-mgr: Persist Enabled property on reboot

The "Enabled" property of xyz.openbmc_project.Object.Enable interface of the ip address object
(eg: /xyz/openbmc_project/network/hypervisor/eth<0/1>/ipv4/addr0) will be set by pldm once the host consumes the ip address set by the user. When the system reboots, this value is not persisted and is defaulted to false.
Pldm will not be updating this value on reboot, it only sets it when phyp sends the sensor event when the ip is consumed and pldm receives this and sets the "Enabled" property.

• ibm/hyp-nw-mgr: Add ipv6 support in hypervisor app

Currently, there is no support for ipv6 in the hypervisor application.
This commit adds ipv6 support, and the changes mainly includes creation of ipv4 & ipv6 dbus objects when the application starts; adding support in watch method where ipv6 property changes are also monitored; setting default values for ipv6 properties in the bios.

• ibm/hyp-nw-mgr: Add Hypervisor IPv6 SLAAC support

This commit adds "StatelessAddressAutoConfig" support in the hypervisor app. Earlier there were only 4 values - none, both, v4, v6. Now with the latest dbus interfaces change, there are 2 more values introduced - v6Stateless, v4v6Stateless.

v4v6stateless: Enable IPv4 DHCP and IPv6 SLAAC
v6stateless: Enable IPv6 SLAAC

• ibm/hyp-nw-mgr: Add dependency on pldm service

The hypervisor app depends on the bios service currently, that comes up with the bios table. But it is pldm that populates the bios table values.

There are cases, where hypervisor app comes up first before pldm populates the bios table, causing the app to have default values (0.0.0.0 ip) in the dbus even when hypervisor network ip has been configured.

This commit adds a dependency on pldm service for the hypervisor app to start.

bmcweb commit: ibm-openbmc/bmcweb#1232

Tested By:

busctl tree xyz.openbmc_project.Network.Hypervisor

• configure static ip and the same has been updated on the biostable

'''
PATCH -D patch.txt -d '{"IPv4StaticAddresses":[{"Address": "10.6.6.2", "SubnetMask": "255.255.252.0","Gateway":"10.6.6.1"}]}' https://${bmc}/redfish/v1/Systems/hypervisor/EthernetInterfaces/eth0 '''

• update ip properties on the bios table and the same has reflected on the dbus object
• enable dhcp, bios table will be updated with the dhcp server sent ip and the same reflects on the dbus object
• Checked both reboot and code update scenarios