netdev - Re: [PATCH net-next] netlink: provide an ability to set default extack message

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Date:   Thu, 26 Jan 2023 15:39:21 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Leon Romanovsky <leon@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Leon Romanovsky <leonro@...dia.com>,
        Andrew Lunn <andrew@...n.ch>,
        bridge@...ts.linux-foundation.org,
        Eric Dumazet <edumazet@...gle.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        netdev@...r.kernel.org, Nikolay Aleksandrov <razor@...ckwall.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Roopa Prabhu <roopa@...dia.com>
Subject: Re: [PATCH net-next] netlink: provide an ability to set default
 extack message

On Fri, 27 Jan 2023 00:44:57 +0200 Vladimir Oltean wrote:
> On Thu, Jan 26, 2023 at 02:37:23PM -0800, Jakub Kicinski wrote:
> > > I would somewhat prefer not doing this, and instead introducing a new
> > > NL_SET_ERR_MSG_WEAK() of sorts.  
> > 
> > That'd be my preference too, FWIW. It's only the offload cases which
> > need this sort of fallback.
> > 
> > BTW Vladimir, I remember us discussing this. I was searching the
> > archive as you sent this, but can't find the thread. Mostly curious
> > whether I flip flipped on this or I'm not completely useless :)  
> 
> What we discussed was on a patch of mine fixing "if (!extack->_msg)" to
> "if (extack && !extack->_msg)". I never proposed a new macro wrapper
> (you did), but I didn't do it at the time because it was a patch for
> "net", and I forgot to put a reminder for the next net->net-next merge.
> https://lore.kernel.org/netdev/20220822182523.6821e176@kernel.org/
> And from there, out of sight, out of mind.

That explains it, I was running blame the message lines, not the if ().
Thanks for digging it up!