ixgbe: Deny MACVLAN requests from VFs with admin set MAC

If the host VMM administrator has set the virtual function device's
MAC address then also deny VF requests for MACVLAN filters.
Signed-off-by: NGreg Rose <gregory.v.rose@intel.com>
Tested-by: NGarrett, Robert <robertx.e.garrett@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c

@@ -635,6 +635,12 @@ static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 		}
 		break;
 	case IXGBE_VF_SET_MACVLAN:
+		if (adapter->vfinfo[vf].pf_set_mac) {
+			e_warn(drv, "VF %d requested MACVLAN filter but is "
+				    "administratively denied\n", vf);
+			retval = -1;
+			break;
+		}
 		index = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK) >>
 			IXGBE_VT_MSGINFO_SHIFT;
 		/*