|To:||Jesse Gross <jesse-l0M0P4e3n4LQT0dZR+AlfA-AT-public.gmane.org>|
|Subject:||Re: [PATCH net-next 4/4] net: Add Open vSwitch kernel components.|
|Date:||Mon, 21 Nov 2011 07:20:07 -0500|
|Cc:||dev-yBygre7rU0TnMu66kgdUjQ-AT-public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA-AT-public.gmane.org, "David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q-AT-public.gmane.org>|
On Fri, 2011-11-18 at 15:12 -0800, Jesse Gross wrote: > Open vSwitch is a multilayer Ethernet switch targeted at virtualized > environments. In addition to supporting a variety of features > expected in a traditional hardware switch, it enables fine-grained > programmatic extension and flow-based control of the network. > This control is useful in a wide variety of applications but is > particularly important in multi-server virtualization deployments, > which are often characterized by highly dynamic endpoints and the need > to maintain logical abstractions for multiple tenants. > > The Open vSwitch datapath provides an in-kernel fast path for packet > forwarding. It is complemented by a userspace daemon, ovs-vswitchd, > which is able to accept configuration from a variety of sources and > translate it into packet processing rules. > So the last time we had a discussion on this on the list, we seemed to agree that you could use the tc classifier-action infrastructure. For simplicity, we agreed you will need to do a speacilized classifier. You may need to add a few more actions. What happened since? You are replicating a lot of code and semantic that exist (not just on classifier actions). You could improve the exisiting infrastructure instead. We are eventually going to have two competing interfaces as a result. You may only need 1 or 2 different classification schemes today and try to justify you need it for simplicity - but in a few months you'll need one more then another action and another and you'll keep adding to your infrastructure. cheers, jamal
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