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Date: Thu, 11 Dec 2014 12:01:15 +0100 From: Jiri Pirko <jiri@...nulli.us> To: "Varlese, Marco" <marco.varlese@...el.com> Cc: John Fastabend <john.fastabend@...il.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "stephen@...workplumber.org" <stephen@...workplumber.org>, "Fastabend, John R" <john.r.fastabend@...el.com>, "roopa@...ulusnetworks.com" <roopa@...ulusnetworks.com>, "sfeldma@...il.com" <sfeldma@...il.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [RFC PATCH net-next 1/1] net: Support for switch port configuration Thu, Dec 11, 2014 at 10:59:42AM CET, marco.varlese@...el.com wrote: >> -----Original Message----- >> From: John Fastabend [mailto:john.fastabend@...il.com] >> Sent: Wednesday, December 10, 2014 5:04 PM >> To: Jiri Pirko >> Cc: Varlese, Marco; netdev@...r.kernel.org; >> stephen@...workplumber.org; Fastabend, John R; >> roopa@...ulusnetworks.com; sfeldma@...il.com; linux- >> kernel@...r.kernel.org >> Subject: Re: [RFC PATCH net-next 1/1] net: Support for switch port >> configuration >> >> On 12/10/2014 08:50 AM, Jiri Pirko wrote: >> > Wed, Dec 10, 2014 at 05:23:40PM CET, marco.varlese@...el.com wrote: >> >> From: Marco Varlese <marco.varlese@...el.com> >> >> >> >> Switch hardware offers a list of attributes that are configurable on >> >> a per port basis. >> >> This patch provides a mechanism to configure switch ports by adding >> >> an NDO for setting specific values to specific attributes. >> >> There will be a separate patch that extends iproute2 to call the new >> >> NDO. >> > >> > >> > What are these attributes? Can you give some examples. I'm asking >> > because there is a plan to pass generic attributes to switch ports >> > replacing current specific ndo_switch_port_stp_update. In this case, >> > bridge is setting that attribute. >> > >> > Is there need to set something directly from userspace or does it make >> > rather sense to use involved bridge/ovs/bond ? I think that both will >> > be needed. >> >> +1 >> >> I think for many attributes it would be best to have both. The in kernel callers >> and netlink userspace can use the same driver ndo_ops. >> >> But then we don't _require_ any specific bridge/ovs/etc module. And we >> may have some attributes that are not specific to any existing software >> module. I'm guessing Marco has some examples of these. >> >> [...] >> >> >> -- >> John Fastabend Intel Corporation > >We do have a need to configure the attributes directly from user-space and I have identified the tool to do that in iproute2. > >An example of attributes are: >* enabling/disabling of learning of source addresses on a given port (you can imagine the attribute called LEARNING for example); >* internal loopback control (i.e. LOOPBACK) which will control how the flow of traffic behaves from the switch fabric towards an egress port; >* flooding for broadcast/multicast/unicast type of packets (i.e. BFLOODING, MFLOODING, UFLOODING); > >Some attributes would be of the type enabled/disabled while other will allow specific values to allow the user to configure different behaviours of that feature on that particular port on that platform. > >One thing to mention - as John stated as well - there might be some attributes that are not specific to any software module but rather have to do with the actual hardware/platform to configure. > >I hope this clarifies some points. It does. Makes sense. We need to expose this attr set/get for both in-kernel and userspace use cases. Please adjust you patch for this. Also, as a second patch, it would be great if you can convert ndo_switch_port_stp_update to this new ndo. Thanks. > >----------------------------------------------------------- >Marco Varlese - Intel Corporation >----------------------------------------------------------- > > -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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