/* Copyright 2018 The Kubernetes Authors. 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. */ package iommu import ( "fmt" "io/ioutil" "sigs.k8s.io/node-feature-discovery/source" ) const Name = "iommu" // Source implements LabelSource. type Source struct{} func (s Source) Name() string { return Name } // NewConfig method of the LabelSource interface func (s *Source) NewConfig() source.Config { return nil } // GetConfig method of the LabelSource interface func (s *Source) GetConfig() source.Config { return nil } // SetConfig method of the LabelSource interface func (s *Source) SetConfig(source.Config) {} func (s Source) Discover() (source.FeatureLabels, error) { features := source.FeatureLabels{} // Check if any iommu devices are available devices, err := ioutil.ReadDir(source.SysfsDir.Path("class/iommu/")) if err != nil { return nil, fmt.Errorf("failed to check for IOMMU support: %v", err) } if len(devices) > 0 { features["enabled"] = true } return features, nil }