// utility to tear down a disk based filesystem
func diskTearDown(manager diskManager, disk iscsiDisk, volPath string, mounter mount.Interface) error {
mountpoint, err := mounter.IsMountPoint(volPath)
if err != nil {
glog.Errorf("cannot validate mountpoint %s", volPath)
return err
}
if !mountpoint {
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(disk, mntPath); err != nil {
glog.Errorf("failed to detach disk from %s", mntPath)
return err
}
}
mountpoint, mntErr := mounter.IsMountPoint(volPath)
if mntErr != nil {
glog.Errorf("isMountpoint check failed: %v", mntErr)
return err
}
if !mountpoint {
if err := os.Remove(volPath); err != nil {
return err
}
}
return nil
}
