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Message-ID: <ZCRsxERSZiGf5H5e@debian>
Date:   Wed, 29 Mar 2023 18:52:20 +0200
From:   Guillaume Nault <gnault@...hat.com>
To:     "Drewek, Wojciech" <wojciech.drewek@...el.com>
Cc:     Andrea Righi <andrea.righi@...onical.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 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).

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