71 lines
1.4 KiB
Go
71 lines
1.4 KiB
Go
package fs
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import (
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"io/ioutil"
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"path/filepath"
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"strings"
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"time"
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"github.com/dotcloud/docker/pkg/libcontainer/cgroups"
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)
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type freezerGroup struct {
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}
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func (s *freezerGroup) Set(d *data) error {
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switch d.c.Freezer {
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case cgroups.Frozen, cgroups.Thawed:
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dir, err := d.path("freezer")
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if err != nil {
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return err
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}
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if err := writeFile(dir, "freezer.state", string(d.c.Freezer)); err != nil {
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return err
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}
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for {
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state, err := readFile(dir, "freezer.state")
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if err != nil {
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return err
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}
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if strings.TrimSpace(state) == string(d.c.Freezer) {
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break
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}
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time.Sleep(1 * time.Millisecond)
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}
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default:
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if _, err := d.join("freezer"); err != nil && err != cgroups.ErrNotFound {
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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 (s *freezerGroup) Remove(d *data) error {
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return removePath(d.path("freezer"))
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}
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func getFreezerFileData(path string) (string, error) {
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data, err := ioutil.ReadFile(path)
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return strings.TrimSuffix(string(data), "\n"), err
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}
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func (s *freezerGroup) GetStats(d *data, stats *cgroups.Stats) error {
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path, err := d.path("freezer")
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if err != nil {
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return err
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}
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var data string
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if data, err = getFreezerFileData(filepath.Join(path, "freezer.parent_freezing")); err != nil {
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return err
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}
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stats.FreezerStats.ParentState = data
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if data, err = getFreezerFileData(filepath.Join(path, "freezer.self_freezing")); err != nil {
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return err
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}
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stats.FreezerStats.SelfState = data
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return nil
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}
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