2021-03-03 19:02:06 +00:00
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/*
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Copyright 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 kernel
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import (
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"fmt"
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2022-09-08 10:23:49 +00:00
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"os"
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2023-03-13 21:26:13 +00:00
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"path"
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2021-03-03 19:02:06 +00:00
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"strings"
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2023-03-13 21:26:13 +00:00
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"sigs.k8s.io/node-feature-discovery/pkg/utils/hostpath"
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2021-03-03 19:02:06 +00:00
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)
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const kmodProcfsPath = "/proc/modules"
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func getLoadedModules() ([]string, error) {
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out, err := os.ReadFile(kmodProcfsPath)
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2021-03-03 19:02:06 +00:00
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if err != nil {
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return nil, fmt.Errorf("failed to read file %s: %s", kmodProcfsPath, err.Error())
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}
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lines := strings.Split(string(out), "\n")
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loadedMods := make([]string, 0, len(lines))
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for _, line := range lines {
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// skip empty lines
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if len(line) == 0 {
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continue
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}
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// append loaded module
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loadedMods = append(loadedMods, strings.Fields(line)[0])
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}
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return loadedMods, nil
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}
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2023-03-13 21:26:13 +00:00
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func getBuiltinModules() ([]string, error) {
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kVersion, err := getVersion()
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if err != nil {
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return []string{}, err
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}
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kBuiltinModPath := hostpath.LibDir.Path("modules/" + kVersion + "/modules.builtin")
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out, err := os.ReadFile(kBuiltinModPath)
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if err != nil {
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return nil, fmt.Errorf("failed to read file %s: %s", kBuiltinModPath, err.Error())
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}
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lines := strings.Split(string(out), "\n")
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builtinMods := make([]string, 0, len(lines))
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for _, line := range lines {
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// skip empty lines
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line = strings.TrimSpace(line)
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if !strings.HasSuffix(line, ".ko") {
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continue
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}
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// append loaded module
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builtinMods = append(builtinMods, strings.TrimSuffix(path.Base(line), ".ko"))
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}
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return builtinMods, nil
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}
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