mirror of
https://github.com/kubernetes-sigs/node-feature-discovery.git
synced 2025-03-16 21:38:23 +00:00
af0c683f60
Separate feature discovery and creation of feature labels in the pci source. Move pci_utils from source/internal to the source/pci package. Change the implementation of the PciID custom rule to utilize the FeatureSource interface of the pci source. Also, add minimalist unit test.
90 lines
2.3 KiB
Go
90 lines
2.3 KiB
Go
/*
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Copyright 2020-2021 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 rules
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import (
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"fmt"
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"sigs.k8s.io/node-feature-discovery/pkg/api/feature"
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"sigs.k8s.io/node-feature-discovery/source"
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"sigs.k8s.io/node-feature-discovery/source/pci"
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)
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// Rule that matches on the following PCI device attributes: <class, vendor, device>
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// each device attribute will be a list elements(strings).
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// Match operation: OR will be performed per element and AND will be performed per attribute.
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// An empty attribute will not be included in the matching process.
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type PciIDRuleInput struct {
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Class []string `json:"class,omitempty"`
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Vendor []string `json:"vendor,omitempty"`
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Device []string `json:"device,omitempty"`
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}
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type PciIDRule struct {
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PciIDRuleInput
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}
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// Match PCI devices on provided PCI device attributes
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func (r *PciIDRule) Match() (bool, error) {
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devs, ok := source.GetFeatureSource("pci").GetFeatures().Instances[pci.DeviceFeature]
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if !ok {
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return false, fmt.Errorf("cpuid information not available")
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}
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devAttr := map[string]bool{}
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for _, attr := range []string{"class", "vendor", "device"} {
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devAttr[attr] = true
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}
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for _, dev := range devs.Elements {
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// match rule on a single device
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if r.matchDevOnRule(dev) {
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return true, nil
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}
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}
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return false, nil
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}
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func (r *PciIDRule) matchDevOnRule(dev feature.InstanceFeature) bool {
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if len(r.Class) == 0 && len(r.Vendor) == 0 && len(r.Device) == 0 {
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return false
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}
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attrs := dev.Attributes
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if len(r.Class) > 0 && !in(attrs["class"], r.Class) {
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return false
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}
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if len(r.Vendor) > 0 && !in(attrs["vendor"], r.Vendor) {
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return false
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}
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if len(r.Device) > 0 && !in(attrs["device"], r.Device) {
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return false
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}
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return true
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}
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func in(item string, arr []string) bool {
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for _, val := range arr {
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if val == item {
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return true
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}
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}
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return false
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}
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