mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-24 21:14:00 +00:00
103 lines
2.7 KiB
Go
103 lines
2.7 KiB
Go
/**
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# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
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#
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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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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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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 info
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import (
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"github.com/NVIDIA/go-nvml/pkg/dl"
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)
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// Interface provides the API to the info package.
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type Interface interface {
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HasDXCore() (bool, string)
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HasNvml() (bool, string)
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IsTegraSystem() (bool, string)
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}
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type infolib struct {
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root string
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}
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var _ Interface = &infolib{}
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// HasDXCore returns true if DXCore is detected on the system.
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func (i *infolib) HasDXCore() (bool, string) {
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const (
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libraryName = "libdxcore.so"
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)
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if err := assertHasLibrary(libraryName); err != nil {
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return false, fmt.Sprintf("could not load DXCore library: %v", err)
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}
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return true, "found DXCore library"
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}
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// HasNvml returns true if NVML is detected on the system.
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func (i *infolib) HasNvml() (bool, string) {
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const (
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libraryName = "libnvidia-ml.so.1"
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)
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if err := assertHasLibrary(libraryName); err != nil {
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return false, fmt.Sprintf("could not load NVML library: %v", err)
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}
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return true, "found NVML library"
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}
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// IsTegraSystem returns true if the system is detected as a Tegra-based system.
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func (i *infolib) IsTegraSystem() (bool, string) {
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tegraReleaseFile := filepath.Join(i.root, "/etc/nv_tegra_release")
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tegraFamilyFile := filepath.Join(i.root, "/sys/devices/soc0/family")
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if info, err := os.Stat(tegraReleaseFile); err == nil && !info.IsDir() {
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return true, fmt.Sprintf("%v found", tegraReleaseFile)
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}
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if info, err := os.Stat(tegraFamilyFile); err != nil || info.IsDir() {
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return false, fmt.Sprintf("%v file not found", tegraFamilyFile)
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}
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contents, err := os.ReadFile(tegraFamilyFile)
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if err != nil {
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return false, fmt.Sprintf("could not read %v", tegraFamilyFile)
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}
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if strings.HasPrefix(strings.ToLower(string(contents)), "tegra") {
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return true, fmt.Sprintf("%v has 'tegra' prefix", tegraFamilyFile)
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}
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return false, fmt.Sprintf("%v has no 'tegra' prefix", tegraFamilyFile)
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}
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// assertHasLibrary returns an error if the specified library cannot be loaded.
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func assertHasLibrary(libraryName string) error {
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const (
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libraryLoadFlags = dl.RTLD_LAZY
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)
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lib := dl.New(libraryName, libraryLoadFlags)
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if err := lib.Open(); err != nil {
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return err
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}
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defer lib.Close()
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return nil
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}
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