// utility to tear down a disk based filesystem
func diskTearDown(manager diskManager, c fcDiskUnmounter, volPath string, mounter mount.Interface) error {
noMnt, err := mounter.IsLikelyNotMountPoint(volPath)
if err != nil {
glog.Errorf("cannot validate mountpoint %s", volPath)
return err
}
if noMnt {
return os.Remove(volPath)
}
refs, err := mount.GetMountRefs(mounter, volPath)
if err != nil {
glog.Errorf("failed to get reference count %s", volPath)
return err
}
if err := mounter.Unmount(volPath); err != nil {
glog.Errorf("failed to unmount %s", volPath)
return err
}
// If len(refs) is 1, then all bind mounts have been removed, and the
// remaining reference is the global mount. It is safe to detach.
if len(refs) == 1 {
mntPath := refs[0]
if err := manager.DetachDisk(c, mntPath); err != nil {
glog.Errorf("failed to detach disk from %s", mntPath)
return err
}
}
noMnt, mntErr := mounter.IsLikelyNotMountPoint(volPath)
if mntErr != nil {
glog.Errorf("isMountpoint check failed: %v", mntErr)
return err
}
if noMnt {
if err := os.Remove(volPath); err != nil {
return err
}
}
return nil
}
// Unmount the global mount path, which should be the only one, and delete it.
func unmountPDAndRemoveGlobalPath(globalMountPath string, mounter mount.Interface) error {
err := mounter.Unmount(globalMountPath)
os.Remove(globalMountPath)
return err
}
