mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-12-01 16:52:54 +00:00
123 lines
3.0 KiB
Go
123 lines
3.0 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 discover
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import (
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"fmt"
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"path/filepath"
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"strings"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/logger"
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)
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// NewLDCacheUpdateHook creates a discoverer that updates the ldcache for the specified mounts. A logger can also be specified
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func NewLDCacheUpdateHook(logger logger.Interface, mounts Discover, nvidiaCTKPath string) (Discover, error) {
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d := ldconfig{
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logger: logger,
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nvidiaCTKPath: nvidiaCTKPath,
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mountsFrom: mounts,
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}
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return &d, nil
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}
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type ldconfig struct {
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None
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logger logger.Interface
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nvidiaCTKPath string
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mountsFrom Discover
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}
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// Hooks checks the required mounts for libraries and returns a hook to update the LDcache for the discovered paths.
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func (d ldconfig) Hooks() ([]Hook, error) {
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mounts, err := d.mountsFrom.Mounts()
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if err != nil {
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return nil, fmt.Errorf("failed to discover mounts for ldcache update: %v", err)
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}
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h := CreateLDCacheUpdateHook(
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d.nvidiaCTKPath,
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getLibraryPaths(mounts),
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)
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return []Hook{h}, nil
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}
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// CreateLDCacheUpdateHook locates the NVIDIA Container Toolkit CLI and creates a hook for updating the LD Cache
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func CreateLDCacheUpdateHook(executable string, libraries []string) Hook {
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var args []string
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for _, f := range uniqueFolders(libraries) {
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args = append(args, "--folder", f)
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}
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hook := CreateNvidiaCTKHook(
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executable,
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"update-ldcache",
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args...,
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)
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return hook
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}
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// getLibraryPaths extracts the library dirs from the specified mounts
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func getLibraryPaths(mounts []Mount) []string {
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var paths []string
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for _, m := range mounts {
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if !isLibName(m.Path) {
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continue
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}
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paths = append(paths, m.Path)
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}
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return paths
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}
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// isLibName checks if the specified filename is a library (i.e. ends in `.so*`)
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func isLibName(filename string) bool {
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base := filepath.Base(filename)
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isLib, err := filepath.Match("lib?*.so*", base)
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if !isLib || err != nil {
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return false
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}
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parts := strings.Split(base, ".so")
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if len(parts) == 1 {
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return true
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}
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return parts[len(parts)-1] == "" || strings.HasPrefix(parts[len(parts)-1], ".")
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}
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// uniqueFolders returns the unique set of folders for the specified files
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func uniqueFolders(libraries []string) []string {
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var paths []string
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checked := make(map[string]bool)
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for _, l := range libraries {
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dir := filepath.Dir(l)
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if dir == "" {
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continue
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}
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if checked[dir] {
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continue
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}
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checked[dir] = true
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paths = append(paths, dir)
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}
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return paths
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}
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