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Fix overlay unmount for the root case

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In root case no mount call or reference count
increment actually happens so don’t try to unmount.

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
This commit is contained in:
Tonis Tiigi 2016-10-25 14:40:13 -07:00
parent 844a3166e5
commit e4349ad901
1 changed files with 4 additions and 0 deletions
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4
daemon/graphdriver/overlay/overlay.go
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@ -374,6 +374,10 @@ func (d *Driver) Get(id string, mountLabel string) (s string, err error) {
// Put unmounts the mount path created for the give id.
func (d *Driver) Put(id string) error {
// If id has a root, just return
if _, err := os.Stat(path.Join(d.dir(id), "root")); err == nil {
return nil
}
mountpoint := path.Join(d.dir(id), "merged")
if count := d.ctr.Decrement(mountpoint); count > 0 {
return nil