On Tue, Aug 26, 2014 at 03:14:10PM -0600, Junguk Cho wrote:
> But, it is in "struct flow" in lib/flow.h.
> It is not from "struct sw_flow_key" in /datapath/flow.h.
> 
> I assume metadata is used in action in datapath.

metadata is not a datapath concept.  There is no need for it to be a
datapath concept.

Please explain a specific case in which you think that the datapath
would need to know about metadata, then I will explain why it does
not.
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