netdev - Re: [PATCH net-next v2 0/8] net: bridge: add flush filtering support

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Date:   Mon, 11 Apr 2022 14:35:08 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Nikolay Aleksandrov <razor@...ckwall.org>
Cc:     Roopa Prabhu <roopa@...dia.com>, netdev@...r.kernel.org,
        idosch@...sch.org, davem@...emloft.net,
        bridge@...ts.linux-foundation.org
Subject: Re: [PATCH net-next v2 0/8] net: bridge: add flush filtering
 support

On Tue, 12 Apr 2022 00:17:14 +0300 Nikolay Aleksandrov wrote:
> > Yup, basically the policy is defined in the core, so the types are
> > known. We can extract the fields from the message there, even if 
> > the exact meaning of the fields gets established in the callback.
> 
> That sounds nice, but there are a few catches, f.e. some ndo_fdb implementations
> check if attributes were set, i.e. they can also interpret 0, so it will require
> additional state (either special value, bitfield or some other way of telling them
> it was actually present but 0).
> Anyway I think that is orthogonal to adding the flush support, it's a nice cleanup but can
> be done separately because it will have to be done for all ndo_fdb callbacks and I
> suspect the change will grow considerably.
> OTOH the flush implementation via delneigh doesn't require a new ndo_fdb call way,
> would you mind if I finish that up without the struct conversion?

Not terribly, go ahead.