mirror of
https://github.com/kubernetes-sigs/node-feature-discovery.git
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175305b1ad
* Arrange feature sources alphabetically Just a cosmetic change, but, a small readability improvement. * Implement detection of IOMMU (#136) Add a new feature source, i.e. 'iommu', which detects if an IOMMU is present and enabled in the kernel. The new node label is node.alpha.kubernetes-incubator.io/nfd-iommu-present
43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package iommu
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import (
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"fmt"
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"io/ioutil"
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)
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// Implement FeatureSource interface
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type Source struct{}
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func (s Source) Name() string { return "iommu" }
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func (s Source) Discover() ([]string, error) {
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features := []string{}
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// Check if any iommu devices are available
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devices, err := ioutil.ReadDir("/sys/class/iommu/")
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if err != nil {
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return nil, fmt.Errorf("Failed to check for IOMMU support: %v", err)
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}
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if len(devices) > 0 {
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features = append(features, "enabled")
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}
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return features, nil
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}
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