'Extend an existing volume\'s size.'

def extend_volume(self, volume, new_size):

    if (volume['size'] >= new_size):
        LOG.error('New    size    is    smaller    than    original    size.    New:    [%(new)d]    Old:    [%(old)d]', {'new': new_size, 'old': volume['size']})
        return
    self.common.extend_volume(volume, new_size)
