Revision 21bcb9aa lib/cmdlib.py

b/lib/cmdlib.py
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        continue
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      if nic_op != constants.DDM_ADD:
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        # an existing nic
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        if not instance.nics:
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          raise errors.OpPrereqError("Invalid NIC index %s, instance has"
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                                     " no NICs" % nic_op,
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                                     errors.ECODE_INVAL)
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        if nic_op < 0 or nic_op >= len(instance.nics):
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          raise errors.OpPrereqError("Invalid NIC index %s, valid values"
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                                     " are 0 to %d" %
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                                     (nic_op, len(instance.nics)),
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                                     (nic_op, len(instance.nics) - 1),
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                                     errors.ECODE_INVAL)
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        old_nic_params = instance.nics[nic_op].nicparams
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        old_nic_ip = instance.nics[nic_op].ip

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