Pipeline values

[hkwi]

I want to discuss about the design direction.

While a packet is processed in openflow pipeline, there are some metadata with that packet.

1. Pipeline fields
   • OXM_OF_IN_PORT
   • OXM_OF_IN_PHY_PORT
   • OXM_OF_METADATA
   • OXM_OF_TUNNEL_ID
2. Pipeline data
   • "Action Set", which will be updated by OFPIT_WRITE_ACTIONS and OFPIT_CLEAR_ACTIONS
3. Packet parsing cache information, such as offset to non-vlan header.

At this point of 7c6c713 , we use struct packet_fields for cache information.

How do we implement pipeline fields and pipeline data?