lvm_root.py 文件源码

def lock(self, exclusive, block=False):
        lock_type = fcntl.LOCK_EX if exclusive else fcntl.LOCK_SH
        try:
            fcntl.lockf(self.lock_file.fileno(),
                        lock_type | (0 if block else fcntl.LOCK_NB))
        except IOError as e:
            if e.errno in (errno.EACCES, errno.EAGAIN):
                raise LvmLocked("LVM is locked")
            raise