From: Roopa Prabhu <roopa@cumulusnetworks•com>
To: Jiri Pirko <jiri@resnulli•us>
Cc: Jamal Hadi Salim <jhs@mojatatu•com>,
netdev@vger•kernel.org, davem@davemloft•net,
nhorman@tuxdriver•com, andy@greyhouse•net, tgraf@suug•ch,
dborkman@redhat•com, ogerlitz@mellanox•com, jesse@nicira•com,
pshelar@nicira•com, azhou@nicira•com, ben@decadent•org.uk,
stephen@networkplumber•org, jeffrey.t.kirsher@intel•com,
vyasevic@redhat•com, xiyou.wangcong@gmail•com,
john.r.fastabend@intel•com, edumazet@google•com,
sfeldma@cumulusnetworks•com, f.fainelli@gmail•com,
linville@tuxdriver•com, dev@openvswitch•org, jasowang@redhat•com,
ebiederm@xmission•com, nicolas.dichtel@6wind•com,
ryazanov.s.a@gmail•com, buytenh@wantstofly•org,
aviadr@mellanox•com, nbd@openwrt•org,
alexei.starovoitov@gmail•com, Neil.Jerram@metaswitch•com,
ronye@mellanox•com, simon.horman@netronome•com,
alexander.h.duyck@intel•com,
Shrijeet Mukherjee <shm@cumulusnetworks•com>
Subject: Re: [patch net-next v2 8/9] switchdev: introduce Netlink API
Date: Sat, 20 Sep 2014 05:39:57 -0700 [thread overview]
Message-ID: <541D759D.3030000@cumulusnetworks.com> (raw)
In-Reply-To: <20140920080943.GD1821@nanopsycho.orion>
On 9/20/14, 1:09 AM, Jiri Pirko wrote:
> Sat, Sep 20, 2014 at 05:41:16AM CEST, roopa@cumulusnetworks•com wrote:
>> On 9/19/14, 8:49 AM, Jiri Pirko wrote:
>>> Fri, Sep 19, 2014 at 05:25:48PM CEST, jhs@mojatatu•com wrote:
>>>> On 09/19/14 09:49, Jiri Pirko wrote:
>>>>> This patch exposes switchdev API using generic Netlink.
>>>>> Example userspace utility is here:
>>>>> https://github.com/jpirko/switchdev
>>>>>
>>>> Is this just a temporary test tool? Otherwise i dont see reason
>>>> for its existence (or the API that it feeds on).
>>> Please read the conversation I had with Pravin and Jesse in v1 thread.
>>> Long story short they like to have the api separated from ovs datapath
>>> so ovs daemon can use it to directly communicate with driver. Also John
>>> Fastabend requested a way to work with driver flows without using ovs ->
>>> that was the original reason I created switchdev genl api.
>>>
>>> Regarding the "sw" tool, yes it is for testing purposes now. ovs daemon
>>> will use directly switchdev genl api.
>>>
>>> I hope I cleared this out.
>> We already have all the needed rtnetlink kernel api and userspace tools
>> around it to support all
>> switching asic features. ie, the rtnetlink api is the switchdev api. We can
>> do l2, l3, acl's with it.
>> Its unclear to me why we need another new netlink api. Which will mean none
>> of the existing tools to
>> create bridges etc will work on a switchdev.
> No one is proposing such API. Note that what I'm trying to solve in my
> patchset is FLOW world. There is only one API there, ovs genl. But the
> usage of that for hw offload purposes was nacked by ovs maintainer. Plus
> couple of people wanted to run the offloading independently on ovs
> instance. Therefore I introduced the switchdev genl, which takes care of
> that. No plan to extend it for other things you mentioned, just flows.
ok, That was not clear to me. Introducing a new genl api and calling it the
switchd dev api can result it non-flow creep into it in the future.
>
>
>> Which seems like going in the direction exactly opposite to what we had
>> discussed earlier.
> Nope. The previous discussion ignored flows.
>> If a non-ovs flow interface is needed from userspace, we can extend the
>> existing interface to include flows.
> How? You mean to extend rtnetlink? What advantage it would bring
> comparing to separate genl iface?
yes. Advantage would be that we dont have yet another parallel switchdev
netlink api.
>> I don't understand why we should replace the existing rtnetlink switchdev api
>> to accommodate flows.
> Sorry, I do not undertand what "existing rtnetlink switchdev api" you
> have on mind. Would you care to explain?
I am taking about existing rtnetlink api that bridge, ip link uses to
talk l2 and l3 to the kernel.
RTM_NEWROUTE etc.
next prev parent reply other threads:[~2014-09-20 12:40 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-19 13:49 [patch net-next v2 0/9] introduce rocker switch driver with hardware accelerated datapath api Jiri Pirko
2014-09-19 13:49 ` [patch net-next v2 1/9] net: rename netdev_phys_port_id to more generic name Jiri Pirko
[not found] ` <1411134590-4586-2-git-send-email-jiri-rHqAuBHg3fBzbRFIqnYvSA@public.gmane.org>
2014-09-19 13:54 ` Jeff Kirsher
2014-09-19 13:49 ` [patch net-next v2 3/9] rtnl: expose physical switch id for particular device Jiri Pirko
2014-09-19 13:49 ` [patch net-next v2 4/9] net-sysfs: " Jiri Pirko
2014-09-19 13:49 ` [patch net-next v2 5/9] net: introduce dummy switch Jiri Pirko
[not found] ` <1411134590-4586-6-git-send-email-jiri-rHqAuBHg3fBzbRFIqnYvSA@public.gmane.org>
2014-09-20 5:21 ` Florian Fainelli
2014-09-20 7:37 ` Jiri Pirko
2014-09-19 13:49 ` [patch net-next v2 6/9] switchdev: add basic support for flow matching and actions Jiri Pirko
2014-09-20 5:32 ` Florian Fainelli
2014-09-20 7:28 ` Jiri Pirko
2014-09-19 13:49 ` [patch net-next v2 7/9] switchdev: add swdev features Jiri Pirko
2014-09-19 13:49 ` [patch net-next v2 8/9] switchdev: introduce Netlink API Jiri Pirko
2014-09-19 15:25 ` Jamal Hadi Salim
2014-09-19 15:49 ` Jiri Pirko
2014-09-19 17:57 ` Jamal Hadi Salim
2014-09-19 22:12 ` John Fastabend
2014-09-19 22:18 ` Jamal Hadi Salim
2014-09-20 5:39 ` Florian Fainelli
2014-09-20 8:25 ` Jiri Pirko
2014-09-20 8:17 ` Jiri Pirko
2014-09-20 10:19 ` Jamal Hadi Salim
2014-09-20 11:01 ` Thomas Graf
2014-09-20 11:32 ` Jamal Hadi Salim
2014-09-20 11:51 ` Thomas Graf
[not found] ` <20140920115140.GA3777-FZi0V3Vbi30CUdFEqe4BF2D2FQJk+8+b@public.gmane.org>
2014-09-20 12:35 ` Jamal Hadi Salim
2014-09-22 7:53 ` Jiri Pirko
[not found] ` <20140922075337.GA1828-6KJVSR23iU488b5SBfVpbw@public.gmane.org>
2014-09-22 11:48 ` Jamal Hadi Salim
2014-09-20 5:36 ` Florian Fainelli
2014-09-20 8:14 ` Jiri Pirko
2014-09-20 10:53 ` Thomas Graf
2014-09-20 22:50 ` Alexei Starovoitov
2014-09-22 8:13 ` Thomas Graf
2014-09-22 15:10 ` Tom Herbert
2014-09-22 22:17 ` Thomas Graf
[not found] ` <20140922221727.GA4708-FZi0V3Vbi30CUdFEqe4BF2D2FQJk+8+b@public.gmane.org>
2014-09-22 22:40 ` Tom Herbert
2014-09-22 22:53 ` Thomas Graf
2014-09-22 23:07 ` Tom Herbert
2014-09-23 1:36 ` John Fastabend
2014-09-23 7:19 ` Thomas Graf
2014-09-23 11:09 ` Jamal Hadi Salim
[not found] ` <CA+mtBx9ZVQ5r5Hzy9-uEnk+iu+HKkOP4+VANC06Xf8VvTxktwQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-09-23 9:18 ` Thomas Graf
2014-09-23 1:54 ` Alexei Starovoitov
2014-09-23 2:16 ` Tom Herbert
2014-09-23 4:11 ` Andy Gospodarek
2014-09-23 10:11 ` Thomas Graf
2014-09-23 15:32 ` Or Gerlitz
2014-09-24 13:32 ` Thomas Graf
2014-09-26 20:03 ` Or Gerlitz
2014-09-26 21:02 ` Thomas Graf
2014-09-23 9:52 ` Thomas Graf
2014-09-20 3:41 ` Roopa Prabhu
2014-09-20 8:09 ` Jiri Pirko
2014-09-20 12:39 ` Roopa Prabhu [this message]
2014-09-20 8:10 ` Scott Feldman
2014-09-20 10:31 ` Jamal Hadi Salim
[not found] ` <DDC24110-C3F5-470F-B9BE-1D1792415D1E-qUQiAmfTcIp+XZJcv9eMoEEOCMrvLtNR@public.gmane.org>
2014-09-20 12:51 ` Roopa Prabhu
2014-09-20 17:21 ` Scott Feldman
2014-09-20 17:38 ` Jiri Pirko
2014-09-21 1:30 ` Roopa Prabhu
2014-09-19 13:49 ` [patch net-next v2 9/9] rocker: introduce rocker switch driver Jiri Pirko
[not found] ` <1411134590-4586-1-git-send-email-jiri-rHqAuBHg3fBzbRFIqnYvSA@public.gmane.org>
2014-09-19 13:49 ` [patch net-next v2 2/9] net: introduce generic switch devices support Jiri Pirko
2014-09-19 14:15 ` [patch net-next v2 0/9] introduce rocker switch driver with hardware accelerated datapath api David Laight
[not found] ` <063D6719AE5E284EB5DD2968C1650D6D17495CC6-VkEWCZq2GCInGFn1LkZF6NBPR1lH4CV8@public.gmane.org>
2014-09-19 14:20 ` Jiri Pirko
2014-09-20 5:37 ` Florian Fainelli
-- strict thread matches above, loose matches on Subject: below --
2014-09-23 3:43 [patch net-next v2 8/9] switchdev: introduce Netlink API Alexei Starovoitov
2014-09-23 20:57 ` Tom Herbert
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