SRIOV: Set sriov device mtu

This PS exposes the ability to set the vf device mtu.

Change-Id: If1193a71f1da391918e122c3d60f967023b732e1
Signed-off-by: Pete Birley <pete@port.direct>

neutron/templates/bin/_neutron-sriov-agent-init.sh.tpl

@@ -25,6 +25,9 @@ else
   NUM_VFS=$(cat /sys/class/net/{{ $sriov.device }}/device/sriov_totalvfs)
   echo "${NUM_VFS}" > /sys/class/net/{{ $sriov.device }}/device/sriov_numvfs
 fi
+{{- if $sriov.mtu }}
+ip link set dev {{ $sriov.device }} mtu {{ $sriov.mtu }}
+{{- end }}
 ip link set {{ $sriov.device }} up
 ip link show {{ $sriov.device }}
 {{- if $sriov.promisc }}

neutron/values.yaml

@@ -113,6 +113,8 @@ network:
   # sriov:
   #   - device: ${DEV}
   #     num_vfs: 8
+  #     mtu: 9214
+  #     promisc: false
   server:
     ingress:
       public: true