netdev - Re: selftests: net: l2tp.sh regression starting with 6.1-rc1

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Message-ID: <ZCVcxkCkgBmwjnIX@righiandr-XPS-13-7390>
Date:   Thu, 30 Mar 2023 11:56:22 +0200
From:   Andrea Righi <andrea.righi@...onical.com>
To:     "Drewek, Wojciech" <wojciech.drewek@...el.com>
Cc:     Guillaume Nault <gnault@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Shuah Khan <shuah@...nel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: selftests: net: l2tp.sh regression starting with 6.1-rc1

On Thu, Mar 30, 2023 at 09:26:06AM +0000, Drewek, Wojciech wrote:
> 
> 
> > -----Original Message-----
> > From: Andrea Righi <andrea.righi@...onical.com>
> > Sent: czwartek, 30 marca 2023 08:45
> > To: Guillaume Nault <gnault@...hat.com>
> > Cc: Drewek, Wojciech <wojciech.drewek@...el.com>; David S. Miller <davem@...emloft.net>; Eric Dumazet
> > <edumazet@...gle.com>; Jakub Kicinski <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>; Shuah Khan <shuah@...nel.org>;
> > netdev@...r.kernel.org; linux-kselftest@...r.kernel.org; linux-kernel@...r.kernel.org
> > Subject: Re: selftests: net: l2tp.sh regression starting with 6.1-rc1
> > 
> > On Wed, Mar 29, 2023 at 06:52:20PM +0200, Guillaume Nault wrote:
> > > On Wed, Mar 29, 2023 at 03:39:13PM +0000, Drewek, Wojciech wrote:
> > > >
> > > >
> > > > > -----Original Message-----
> > > > > -MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET6, 2, IPPROTO_L2TP);
> > > > > -MODULE_ALIAS_NET_PF_PROTO(PF_INET6, IPPROTO_L2TP);
> > > > > +MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET6, 2, 115 /* IPPROTO_L2TP */);
> > > > > +MODULE_ALIAS_NET_PF_PROTO(PF_INET6, 115 /* IPPROTO_L2TP */);
> > > >
> > > > Btw, am I blind or the alias with type was wrong the whole time?
> > > > pf goes first, then proto and type at the end according to the definition of MODULE_ALIAS_NET_PF_PROTO_TYPE
> > > > and here type (2) is 2nd and proto (115) is 3rd
> > >
> > > You're not blind :). The MODULE_ALIAS_NET_PF_PROTO_TYPE(...) is indeed
> > > wrong. Auto-loading the l2tp_ip and l2tp_ip6 modules only worked
> > > because of the extra MODULE_ALIAS_NET_PF_PROTO() declaration (as
> > > inet_create() and inet6_create() fallback to "net-pf-%d-proto-%d" if
> > > "net-pf-%d-proto-%d-type-%d" fails).
> > 
> > At this point I think using 115 directly is probably the best solution,
> > that is also what we do already with SOCK_DGRAM, but I would just update
> > the comment up above, instead of adding the inline comments.
> 
> Agree,
> 
> I verified the fix on my machine, 
> Do you want me to send the patch or you'll just send below one?

Sent already. :)

-Andrea