func (devices *DeviceSet) deactivatePool() error {
glog.V(1).Infof("[devmapper] deactivatePool()")
defer glog.V(1).Infof("[devmapper] deactivatePool END")
devname := devices.getPoolDevName()
devinfo, err := devicemapper.GetInfo(devname)
if err != nil {
return err
}
if d, err := devicemapper.GetDeps(devname); err == nil {
// Access to more Debug output
glog.V(1).Infof("[devmapper] devicemapper.GetDeps() %s: %#v", devname, d)
}
if devinfo.Exists != 0 {
return devicemapper.RemoveDevice(devname)
}
return nil
}
// Issues the underlying dm remove operation.
func (devices *DeviceSet) removeDevice(devname string) error {
var err error
glog.V(1).Infof("[devmapper] removeDevice START(%s)", devname)
defer glog.V(1).Infof("[devmapper] removeDevice END(%s)", devname)
for i := 0; i < 200; i++ {
err = devicemapper.RemoveDevice(devname)
if err == nil {
break
}
if err != devicemapper.ErrBusy {
return err
}
// If we see EBUSY it may be a transient error,
// sleep a bit a retry a few times.
devices.Unlock()
time.Sleep(100 * time.Millisecond)
devices.Lock()
}
return err
}