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Diffstat (limited to 'pkg/cgroups/cpuset.go')
-rw-r--r--pkg/cgroups/cpuset.go81
1 files changed, 81 insertions, 0 deletions
diff --git a/pkg/cgroups/cpuset.go b/pkg/cgroups/cpuset.go
new file mode 100644
index 000000000..9aef493c9
--- /dev/null
+++ b/pkg/cgroups/cpuset.go
@@ -0,0 +1,81 @@
+package cgroups
+
+import (
+ "fmt"
+ "io/ioutil"
+ "os"
+ "path/filepath"
+ "strings"
+
+ spec "github.com/opencontainers/runtime-spec/specs-go"
+ "github.com/pkg/errors"
+)
+
+type cpusetHandler struct {
+}
+
+func cpusetCopyFileFromParent(dir, file string) ([]byte, error) {
+ if dir == cgroupRoot {
+ return nil, fmt.Errorf("could not find parent to initialize cpuset %s", file)
+ }
+ path := filepath.Join(dir, file)
+ data, err := ioutil.ReadFile(path)
+ if err != nil {
+ return nil, errors.Wrapf(err, "open %s", path)
+ }
+ if len(strings.Trim(string(data), "\n")) != 0 {
+ return data, nil
+ }
+ data, err = cpusetCopyFileFromParent(filepath.Dir(dir), file)
+ if err != nil {
+ return nil, err
+ }
+ if err := ioutil.WriteFile(path, data, 0644); err != nil {
+ return nil, errors.Wrapf(err, "write %s", path)
+ }
+ return data, nil
+}
+
+func cpusetCopyFromParent(path string) error {
+ for _, file := range []string{"cpuset.cpus", "cpuset.mems"} {
+ if _, err := cpusetCopyFileFromParent(path, file); err != nil {
+ return err
+ }
+ }
+ return nil
+}
+
+func getCpusetHandler() *cpusetHandler {
+ return &cpusetHandler{}
+}
+
+// Apply set the specified constraints
+func (c *cpusetHandler) Apply(ctr *CgroupControl, res *spec.LinuxResources) error {
+ if res.CPU == nil {
+ return nil
+ }
+ return fmt.Errorf("cpuset apply not implemented yet")
+}
+
+// Create the cgroup
+func (c *cpusetHandler) Create(ctr *CgroupControl) (bool, error) {
+ if ctr.cgroup2 {
+ return false, fmt.Errorf("cpuset create not implemented for cgroup v2")
+ }
+
+ created, err := ctr.createCgroupDirectory(CPUset)
+ if !created || err != nil {
+ return created, err
+ }
+ return true, cpusetCopyFromParent(ctr.getCgroupv1Path(CPUset))
+}
+
+// Destroy the cgroup
+func (c *cpusetHandler) Destroy(ctr *CgroupControl) error {
+ return os.Remove(ctr.getCgroupv1Path(CPUset))
+}
+
+// Stat fills a metrics structure with usage stats for the controller
+func (c *cpusetHandler) Stat(ctr *CgroupControl, m *Metrics) error {
+ return nil
+}