netdev - Re: [regression] TCP_MD5SIG on established sockets

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Message-ID: <CAHk-=wh=CEzD+xevqpJnOJ9w72=bEMjDNmKdovoR5GnESJBdqA@mail.gmail.com>
Date:   Tue, 30 Jun 2020 12:43:21 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        "David S. Miller" <davem@...emloft.net>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        Yuchung Cheng <ycheng@...gle.com>,
        Jonathan Rajotte-Julien <joraj@...icios.com>
Subject: Re: [regression] TCP_MD5SIG on established sockets

On Mon, Jun 29, 2020 at 1:47 PM Eric Dumazet <edumazet@...gle.com> wrote:
>
> If you want to be able to _change_ md5 key, this is fine by me, please
> send a patch.

Eric, if this change breaks existing users, then it gets reverted.
That's just fundamental.

No RFC's are in the lreast relevant when compared to "this broke
existing users".

If you're not willing to do the work to fix it, I will revert that
commit. Because that's how it works - you can't ask other people to
fix the breakage you introduced.

It really is that simple. We do not allow developers to break things
and then step away and say "not my problem".

         Linus