Revision 3977a4c1

b/lib/cmdlib.py
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    self.sstore = sstore
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    self.context = context
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    self.needed_locks = None
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    self.share_locks = dict(((i, 0) for i in locking.LEVELS))
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    self.__ssh = None
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    for attr_name in self._OP_REQP:


  		





  ......




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        (this reflects what LockSet does, and will be replaced before


  		





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        CheckPrereq with the full list of nodes that have been locked)


  		





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    If you need to share locks (rather than acquire them exclusively) at one


  		





  
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    level you can modify self.share_locks, setting a true value (usually 1) for


  		





  
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    that level. By default locks are not shared.


  		





  
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    Examples:


  		





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    # Acquire all nodes and one instance


  		





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    self.needed_locks = {


  		












  

    
      b/lib/mcpu.py
    
  






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      # This gives a chance to LUs to make last-minute changes after acquiring


  		





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      # locks at any preceding level.


  		





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      lu.DeclareLocks(level)


  		





  
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      needed_locks = lu.needed_locks[level]


  		





  
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      share = lu.share_locks[level]


  		





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      # This is always safe to do, as we can't acquire more/less locks than


  		





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      # what was requested.


  		





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      lu.needed_locks[level] = self.context.glm.acquire(level,


  		





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                                                        lu.needed_locks[level])


  		





  
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                                                        needed_locks,


  		





  
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                                                        shared=share)


  		





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      try:


  		





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        result = self._LockAndExecLU(lu, level + 1)


  		





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      finally:


  		












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