netdev - Re: [patch net-next 07/10] bridge: call netdev_sw_port_stp_update when bridge port STP status changes

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Message-ID: <20141107083219.GA1848@nanopsycho.orion>
Date:	Fri, 7 Nov 2014 09:32:19 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	Scott Feldman <sfeldma@...il.com>
Cc:	Florian Fainelli <f.fainelli@...il.com>,
	Netdev <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>, nhorman@...driver.com,
	Andy Gospodarek <andy@...yhouse.net>,
	Thomas Graf <tgraf@...g.ch>, dborkman@...hat.com,
	ogerlitz@...lanox.com, jesse@...ira.com, pshelar@...ira.com,
	azhou@...ira.com, ben@...adent.org.uk, stephen@...workplumber.org,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
	vyasevic@...hat.com, xiyou.wangcong@...il.com,
	"Fastabend, John R" <john.r.fastabend@...el.com>,
	edumazet@...gle.com, jhs@...atatu.com,
	Roopa Prabhu <roopa@...ulusnetworks.com>,
	John Linville <linville@...driver.com>, jasowang@...hat.com,
	ebiederm@...ssion.com, nicolas.dichtel@...nd.com,
	ryazanov.s.a@...il.com, buytenh@...tstofly.org,
	aviadr@...lanox.com, nbd@...nwrt.org, alexei.starovoitov@...il.com,
	Neil.Jerram@...aswitch.com, ronye@...lanox.com,
	simon.horman@...ronome.com, alexander.h.duyck@...hat.com,
	"Ronciak, John" <john.ronciak@...el.com>, mleitner@...hat.com,
	Shrijeet Mukherjee <shrijeet@...il.com>,
	Andy Gospodarek <gospo@...ulusnetworks.com>,
	Benjamin LaHaise <bcrl@...ck.org>
Subject: Re: [patch net-next 07/10] bridge: call netdev_sw_port_stp_update
 when bridge port STP status changes

Thu, Nov 06, 2014 at 07:53:35PM CET, sfeldma@...il.com wrote:
>On Thu, Nov 6, 2014 at 6:59 AM, Florian Fainelli <f.fainelli@...il.com>
>wrote:
>
>> On 11/06/2014 01:20 AM, Jiri Pirko wrote:
>> > From: Scott Feldman <sfeldma@...il.com>
>> >
>> > To notify switch driver of change in STP state of bridge port, add new
>> > .ndo op and provide swdev wrapper func to call ndo op. Use it in bridge
>> > code then.
>> >
>> > Signed-off-by: Scott Feldman <sfeldma@...il.com>
>> > Signed-off-by: Jiri Pirko <jiri@...nulli.us>
>> > ---
>>
>> [snip]
>>
>> >  #endif /* _LINUX_SWITCHDEV_H_ */
>> > diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
>> > index 86c239b..13fecf1 100644
>> > --- a/net/bridge/br_netlink.c
>> > +++ b/net/bridge/br_netlink.c
>> > @@ -17,6 +17,7 @@
>> >  #include <net/net_namespace.h>
>> >  #include <net/sock.h>
>> >  #include <uapi/linux/if_bridge.h>
>> > +#include <net/switchdev.h>
>> >
>> >  #include "br_private.h"
>> >  #include "br_private_stp.h"
>> > @@ -304,6 +305,7 @@ static int br_set_port_state(struct net_bridge_port
>> *p, u8 state)
>> >
>> >       br_set_state(p, state);
>> >       br_log_state(p);
>> > +     netdev_sw_port_stp_update(p->dev, p->state);
>>
>> Is there a reason netdev_sw_port_stp_update() is not folded in
>> br_set_state()? Are we missing calls to br_set_state() in some locations?
>>
>
>I put the netdev_sw call at the same level as br_log_state() and
>br_ifinfo_notify(),
>but now that you bring up the question, I agree it would be cleaner/safer
>if netdev_sw call was from br_set_state().

Not sure about this. netdev_sw_port_stp_update is not called every time
br_set_state is called. br_log_state is in simillar position.
br_set_state is now just a simple setter. I would probably leave this
change for the possible future follow-up. It can move br_log_state call
as well.


>
>
>> --
>> Florian
>>
--
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