Ben, Let me step back a bit.
There are 2 kinds of flows as described in FAQ. 1) OF Flows 2) Kernel flows. As i understand, - Kernel flows are the normal L2 flows that are learnt on the fly by datapath. - OF flows are the one programmed by controller or using ovs-ofctl. Assume a case where "ovs-ofctl" is used to program an OF entry with any packets received with SRC_IP=23.0.0.1 as DROP. This flow is *NOT* programmed in the kernel as it is an OF entry. When a packet with SRC_IP=23.0.0.1 is received by kernel, it will get punted to user_space because there is no match in kernel. vSwitchd would subsequently updated the kernel with SRC_IP=23.0.0.1 with whatever action. In the whole process OF flow does not seem to affect the datapath at all. So the question is, how OF flow programmed thro' "ovs-ofctl" affects datapath in the example considered above ? On Fri, Apr 25, 2014 at 9:58 AM, Ben Pfaff <b...@nicira.com> wrote: > None of that makes sense. > > On Fri, Apr 25, 2014 at 09:06:11AM -0700, Bhargav Bhikkaji wrote: > > So, all OF-Flows are user-space switched and all Non-OF-flows kernel > > switched (unless there is a flow miss). > > > > Do you expect a flow to be both OF & Non-OF ?. If so, how does it > work-like > > ?. > > > > > > On Thu, Apr 24, 2014 at 3:50 PM, Ben Pfaff <b...@nicira.com> wrote: > > > > > No. No. > > > > > > On Thu, Apr 24, 2014 at 3:44 PM, Bhargav Bhikkaji > > > <bhargav.i...@gmail.com> wrote: > > > > Does "ovs-ofctl flows" gets programmed in the kernel ? or is that > > > > "ovs-dpctl dump-flows" dumps both of-flows & flows that got punted ? > > > > > > > > > > > > On Thu, Apr 24, 2014 at 3:38 PM, Ben Pfaff <b...@nicira.com> wrote: > > > >> > > > >> On Thu, Apr 24, 2014 at 03:37:12PM -0700, Bhargav Bhikkaji wrote: > > > >> > My actual question is, if there is flow miss in the datapath, the > > > packet > > > >> > is > > > >> > punted to the user-space (vswitchd) which programs the missed > flow on > > > >> > datapath. Essentially, vswitchd handles the flow management for > > > >> > datapath. > > > >> > Is there a way to dump in vswitchd those flows that got punted and > > > gets > > > >> > programmed subsequently in datapath ? > > > >> > > > >> The flows that got punted and programmed are the flows dumped by > > > >> "ovs-dpctl dump-flows". > > > > > > > > > > > > > > > > > > > > -- > > > "I don't normally do acked-by's. I think it's my way of avoiding > > > getting blamed when it all blows up." Andrew Morton > > > >
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