kotovalexarian-likes-github/moby--moby
1
0
Fork 0
mirror of https://github.com/moby/moby.git synced 2022-11-09 12:21:53 -05:00
Code Releases Activity

Copy aufs hardlinks to top layer

Browse source 
Show warning if old method is used.

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
This commit is contained in:
Tonis Tiigi 2015-10-05 10:37:54 -07:00
parent b0cbc02283
commit ef05b83417
2 changed files with 95 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
daemon/graphdriver/aufs/aufs.go
View file

@ -360,10 +360,20 @@ func (a *Driver) Diff(id, parent string) (archive.Archive, error) {
}
func (a *Driver) applyDiff(id string, diff archive.Reader) error {
return chrootarchive.UntarUncompressed(diff, path.Join(a.rootPath(), "diff", id), &archive.TarOptions{
dir := path.Join(a.rootPath(), "diff", id)
if err := chrootarchive.UntarUncompressed(diff, dir, &archive.TarOptions{
UIDMaps: a.uidMaps,
GIDMaps: a.gidMaps,
})
}); err != nil {
return err
}
// show invalid whiteouts warning.
files, err := ioutil.ReadDir(path.Join(dir, archive.WhiteoutLinkDir))
if err == nil && len(files) > 0 {
logrus.Warnf("Archive contains aufs hardlink references that are not supported.")
}
return nil
}
// DiffSize calculates the changes between the specified id
@ -493,7 +503,7 @@ func (a *Driver) aufsMount(ro []string, rw, target, mountLabel string) (err erro
}
if firstMount {
opts := "dio,xino=/dev/shm/aufs.xino"
opts := "dio,noplink,xino=/dev/shm/aufs.xino"
if useDirperm() {
opts += ",dirperm1"
}

82
daemon/graphdriver/aufs/aufs_test.go
View file

@ -638,6 +638,88 @@ func TestApplyDiff(t *testing.T) {
}
}
func TestHardlinks(t *testing.T) {
// Copy 2 layers that have linked files to new layers and check if hardlink are preserved
d := newDriver(t)
defer os.RemoveAll(tmp)
defer d.Cleanup()
origFile := "test_file"
linkedFile := "linked_file"
if err := d.Create("source-1", ""); err != nil {
t.Fatal(err)
}
mountPath, err := d.Get("source-1", "")
if err != nil {
t.Fatal(err)
}
f, err := os.Create(path.Join(mountPath, origFile))
if err != nil {
t.Fatal(err)
}
f.Close()
layerTar1, err := d.Diff("source-1", "")
if err != nil {
t.Fatal(err)
}
if err := d.Create("source-2", "source-1"); err != nil {
t.Fatal(err)
}
mountPath, err = d.Get("source-2", "")
if err != nil {
t.Fatal(err)
}
if err := os.Link(path.Join(mountPath, origFile), path.Join(mountPath, linkedFile)); err != nil {
t.Fatal(err)
}
layerTar2, err := d.Diff("source-2", "source-1")
if err != nil {
t.Fatal(err)
}
if err := d.Create("target-1", ""); err != nil {
t.Fatal(err)
}
if _, err := d.ApplyDiff("target-1", "", layerTar1); err != nil {
t.Fatal(err)
}
if err := d.Create("target-2", "target-1"); err != nil {
t.Fatal(err)
}
if _, err := d.ApplyDiff("target-2", "target-1", layerTar2); err != nil {
t.Fatal(err)
}
mountPath, err = d.Get("target-2", "")
if err != nil {
t.Fatal(err)
}
fi1, err := os.Lstat(path.Join(mountPath, origFile))
if err != nil {
t.Fatal(err)
}
fi2, err := os.Lstat(path.Join(mountPath, linkedFile))
if err != nil {
t.Fatal(err)
}
if !os.SameFile(fi1, fi2) {
t.Fatal("Target files are not linked")
}
}
func hash(c string) string {
h := sha256.New()
fmt.Fprint(h, c)