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c86189d554
Replaced github.com/docker/libcontainer with github.com/opencontainers/runc/libcontaier. Also I moved AppArmor profile generation to docker. Main idea of this update is to fix mounting cgroups inside containers. After updating docker on CI we can even remove dind. Signed-off-by: Alexander Morozov <lk4d4@docker.com>
102 lines
2 KiB
Go
102 lines
2 KiB
Go
// +build linux windows
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package vfs
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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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"github.com/docker/docker/daemon/graphdriver"
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"github.com/docker/docker/pkg/chrootarchive"
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"github.com/docker/docker/pkg/system"
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"github.com/opencontainers/runc/libcontainer/label"
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)
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func init() {
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graphdriver.Register("vfs", Init)
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}
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func Init(home string, options []string) (graphdriver.Driver, error) {
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d := &Driver{
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home: home,
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}
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return graphdriver.NaiveDiffDriver(d), nil
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}
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type Driver struct {
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home string
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}
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func (d *Driver) String() string {
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return "vfs"
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}
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func (d *Driver) Status() [][2]string {
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return nil
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}
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func (d *Driver) GetMetadata(id string) (map[string]string, error) {
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return nil, nil
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}
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func (d *Driver) Cleanup() error {
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return nil
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}
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func (d *Driver) Create(id, parent string) error {
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dir := d.dir(id)
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if err := system.MkdirAll(filepath.Dir(dir), 0700); err != nil {
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return err
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}
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if err := os.Mkdir(dir, 0755); err != nil {
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return err
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}
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opts := []string{"level:s0"}
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if _, mountLabel, err := label.InitLabels(opts); err == nil {
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label.SetFileLabel(dir, mountLabel)
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}
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if parent == "" {
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return nil
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}
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parentDir, err := d.Get(parent, "")
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if err != nil {
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return fmt.Errorf("%s: %s", parent, err)
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}
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if err := chrootarchive.CopyWithTar(parentDir, dir); err != nil {
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return err
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}
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return nil
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}
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func (d *Driver) dir(id string) string {
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return filepath.Join(d.home, "dir", filepath.Base(id))
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}
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func (d *Driver) Remove(id string) error {
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if _, err := os.Stat(d.dir(id)); err != nil {
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return err
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}
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return os.RemoveAll(d.dir(id))
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}
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func (d *Driver) Get(id, mountLabel string) (string, error) {
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dir := d.dir(id)
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if st, err := os.Stat(dir); err != nil {
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return "", err
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} else if !st.IsDir() {
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return "", fmt.Errorf("%s: not a directory", dir)
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}
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return dir, nil
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}
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func (d *Driver) Put(id string) error {
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// The vfs driver has no runtime resources (e.g. mounts)
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// to clean up, so we don't need anything here
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return nil
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}
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func (d *Driver) Exists(id string) bool {
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_, err := os.Stat(d.dir(id))
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return err == nil
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}
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