On Tue, 13 Aug 2019 13:37:48 +0000 Ori Kam <or...@mellanox.com> wrote:
> This RFC replaces RFC[1]. > > The hairpin feature (different name can be forward) acts as "bump on the > wire", > meaning that a packet that is received from the wire can be modified using > offloaded action and then sent back to the wire without application > intervention > which save CPU cycles. > > The hairpin is the inverse function of loopback in which application > sends a packet then it is received again by the > application without being sent to the wire. > > The hairpin can be used by a number of different NVF, for example load > balancer, gateway and so on. > > As can be seen from the hairpin description, hairpin is basically RX queue > connected to TX queue. > > During the design phase I was thinking of two ways to implement this > feature the first one is adding a new rte flow action. and the second > one is create a special kind of queue. Life would be easier for users if the hairpin was an attribute of queue configuration, not a separate API call.
