mirror of
https://github.com/superseriousbusiness/gotosocial.git
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57dc742c76
Bumps [github.com/KimMachineGun/automemlimit](https://github.com/KimMachineGun/automemlimit) from 0.2.4 to 0.2.5. - [Release notes](https://github.com/KimMachineGun/automemlimit/releases) - [Commits](https://github.com/KimMachineGun/automemlimit/compare/v0.2.4...v0.2.5) --- updated-dependencies: - dependency-name: github.com/KimMachineGun/automemlimit dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
159 lines
3.8 KiB
Go
159 lines
3.8 KiB
Go
/*
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Copyright The containerd 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 cgroup1
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import (
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"bytes"
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"fmt"
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"os"
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"path/filepath"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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)
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func NewCpuset(root string) *cpusetController {
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return &cpusetController{
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root: filepath.Join(root, string(Cpuset)),
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}
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}
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type cpusetController struct {
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root string
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}
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func (c *cpusetController) Name() Name {
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return Cpuset
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}
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func (c *cpusetController) Path(path string) string {
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return filepath.Join(c.root, path)
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}
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func (c *cpusetController) Create(path string, resources *specs.LinuxResources) error {
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if err := c.ensureParent(c.Path(path), c.root); err != nil {
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return err
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}
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if err := os.MkdirAll(c.Path(path), defaultDirPerm); err != nil {
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return err
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}
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if err := c.copyIfNeeded(c.Path(path), filepath.Dir(c.Path(path))); err != nil {
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return err
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}
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if resources.CPU != nil {
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for _, t := range []struct {
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name string
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value string
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}{
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{
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name: "cpus",
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value: resources.CPU.Cpus,
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},
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{
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name: "mems",
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value: resources.CPU.Mems,
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},
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} {
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if t.value != "" {
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if err := os.WriteFile(
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filepath.Join(c.Path(path), "cpuset."+t.name),
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[]byte(t.value),
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defaultFilePerm,
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); err != nil {
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return err
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}
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}
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}
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}
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return nil
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}
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func (c *cpusetController) Update(path string, resources *specs.LinuxResources) error {
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return c.Create(path, resources)
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}
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func (c *cpusetController) getValues(path string) (cpus []byte, mems []byte, err error) {
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if cpus, err = os.ReadFile(filepath.Join(path, "cpuset.cpus")); err != nil && !os.IsNotExist(err) {
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return
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}
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if mems, err = os.ReadFile(filepath.Join(path, "cpuset.mems")); err != nil && !os.IsNotExist(err) {
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return
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}
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return cpus, mems, nil
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}
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// ensureParent makes sure that the parent directory of current is created
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// and populated with the proper cpus and mems files copied from
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// it's parent.
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func (c *cpusetController) ensureParent(current, root string) error {
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parent := filepath.Dir(current)
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if _, err := filepath.Rel(root, parent); err != nil {
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return nil
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}
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// Avoid infinite recursion.
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if parent == current {
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return fmt.Errorf("cpuset: cgroup parent path outside cgroup root")
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}
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if cleanPath(parent) != root {
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if err := c.ensureParent(parent, root); err != nil {
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return err
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}
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}
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if err := os.MkdirAll(current, defaultDirPerm); err != nil {
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return err
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}
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return c.copyIfNeeded(current, parent)
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}
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// copyIfNeeded copies the cpuset.cpus and cpuset.mems from the parent
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// directory to the current directory if the file's contents are 0
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func (c *cpusetController) copyIfNeeded(current, parent string) error {
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var (
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err error
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currentCpus, currentMems []byte
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parentCpus, parentMems []byte
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)
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if currentCpus, currentMems, err = c.getValues(current); err != nil {
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return err
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}
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if parentCpus, parentMems, err = c.getValues(parent); err != nil {
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return err
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}
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if isEmpty(currentCpus) {
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if err := os.WriteFile(
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filepath.Join(current, "cpuset.cpus"),
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parentCpus,
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defaultFilePerm,
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); err != nil {
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return err
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}
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}
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if isEmpty(currentMems) {
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if err := os.WriteFile(
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filepath.Join(current, "cpuset.mems"),
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parentMems,
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defaultFilePerm,
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); err != nil {
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return err
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}
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}
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return nil
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}
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func isEmpty(b []byte) bool {
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return len(bytes.Trim(b, "\n")) == 0
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}
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