netdev - Re: [PATCH] net: bridge: multicast: notify switchdev driver whenever MC processing gets disabled

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Date:   Tue, 15 Feb 2022 15:42:36 +0200
From:   Ido Schimmel <idosch@...sch.org>
To:     Nikolay Aleksandrov <nikolay@...dia.com>
Cc:     Jakub Kicinski <kuba@...nel.org>,
        Oleksandr Mazur <oleksandr.mazur@...ision.eu>,
        netdev@...r.kernel.org, Roopa Prabhu <roopa@...dia.com>,
        "David S. Miller" <davem@...emloft.net>,
        bridge@...ts.linux-foundation.org,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: Re: [PATCH] net: bridge: multicast: notify switchdev driver whenever
 MC processing gets disabled

On Tue, Feb 15, 2022 at 10:31:41AM +0200, Nikolay Aleksandrov wrote:
> (+CC Ido)
> On 15/02/2022 07:13, Jakub Kicinski wrote:
> > On Fri, 11 Feb 2022 15:14:26 +0200 Oleksandr Mazur wrote:
> >> Whenever bridge driver hits the max capacity of MDBs, it disables
> >> the MC processing (by setting corresponding bridge option), but never
> >> notifies switchdev about such change (the notifiers are called only upon
> >> explicit setting of this option, through the registered netlink interface).
> >>
> >> This could lead to situation when Software MDB processing gets disabled,
> >> but this event never gets offloaded to the underlying Hardware.
> >>
> >> Fix this by adding a notify message in such case.
> > 
> > Any comments on this one?
> > 
> > We have drivers offloading mdb so presumably this should have a Fixes
> > tag and go to net, right?
> 
> The change looks ok, but it'd be nice to get switchdev folks comment as well.
> About the tree, -net should be targeted. I think the issue has existed
> since mdb disabled could be offloaded, so the tag should be:
> 
> Fixes: 147c1e9b902c ("switchdev: bridge: Offload multicast disabled")

LGTM

Oleksandr, please mark future patches as net/net-next:
https://docs.kernel.org/networking/netdev-FAQ.html#how-do-i-indicate-which-tree-net-vs-net-next-my-patch-should-be-in