> -----Original Message-----
> From: Andrea Righi <andrea.righi@xxxxxxxxxxxxx>
> Sent: czwartek, 30 marca 2023 11:55
> To: David Miller <davem@xxxxxxxxxxxxx>; Eric Dumazet <edumazet@xxxxxxxxxx>; Jakub Kicinski <kuba@xxxxxxxxxx>; Paolo Abeni
> <pabeni@xxxxxxxxxx>
> Cc: Shuah Khan <shuah@xxxxxxxxxx>; Drewek, Wojciech <wojciech.drewek@xxxxxxxxx>; netdev@xxxxxxxxxxxxxxx; linux-
> kselftest@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> Subject: [PATCH] l2tp: generate correct module alias strings
>
> Commit 65b32f801bfb ("uapi: move IPPROTO_L2TP to in.h") moved the
> definition of IPPROTO_L2TP from a define to an enum, but since
> __stringify doesn't work properly with enums, we ended up breaking the
> modalias strings for the l2tp modules:
>
> $ modinfo l2tp_ip l2tp_ip6 | grep alias
> alias: net-pf-2-proto-IPPROTO_L2TP
> alias: net-pf-2-proto-2-type-IPPROTO_L2TP
> alias: net-pf-10-proto-IPPROTO_L2TP
> alias: net-pf-10-proto-2-type-IPPROTO_L2TP
>
> Use the resolved number directly in MODULE_ALIAS_*() macros (as we
> already do with SOCK_DGRAM) to fix the alias strings:
>
> $ modinfo l2tp_ip l2tp_ip6 | grep alias
> alias: net-pf-2-proto-115
> alias: net-pf-2-proto-115-type-2
> alias: net-pf-10-proto-115
> alias: net-pf-10-proto-115-type-2
>
> Moreover, fix the ordering of the parameters passed to
> MODULE_ALIAS_NET_PF_PROTO_TYPE() by switching proto and type.
>
> Fixes: 65b32f801bfb ("uapi: move IPPROTO_L2TP to in.h")
> Link: https://lore.kernel.org/lkml/ZCQt7hmodtUaBlCP@righiandr-XPS-13-7390
> Signed-off-by: Guillaume Nault <gnault@xxxxxxxxxx>
> Signed-off-by: Andrea Righi <andrea.righi@xxxxxxxxxxxxx>
Reviewed-by: Wojciech Drewek <wojciech.drewek@xxxxxxxxx>
Tested-by: Wojciech Drewek <wojciech.drewek@xxxxxxxxx>
> ---
> net/l2tp/l2tp_ip.c | 8 ++++----
> net/l2tp/l2tp_ip6.c | 8 ++++----
> 2 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/net/l2tp/l2tp_ip.c b/net/l2tp/l2tp_ip.c
> index 4db5a554bdbd..41a74fc84ca1 100644
> --- a/net/l2tp/l2tp_ip.c
> +++ b/net/l2tp/l2tp_ip.c
> @@ -677,8 +677,8 @@ MODULE_AUTHOR("James Chapman <jchapman@xxxxxxxxxxx>");
> MODULE_DESCRIPTION("L2TP over IP");
> MODULE_VERSION("1.0");
>
> -/* Use the value of SOCK_DGRAM (2) directory, because __stringify doesn't like
> - * enums
> +/* Use the values of SOCK_DGRAM (2) as type and IPPROTO_L2TP (115) as protocol,
> + * because __stringify doesn't like enums
> */
> -MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET, 2, IPPROTO_L2TP);
> -MODULE_ALIAS_NET_PF_PROTO(PF_INET, IPPROTO_L2TP);
> +MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET, 115, 2);
> +MODULE_ALIAS_NET_PF_PROTO(PF_INET, 115);
> diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c
> index 2478aa60145f..5137ea1861ce 100644
> --- a/net/l2tp/l2tp_ip6.c
> +++ b/net/l2tp/l2tp_ip6.c
> @@ -806,8 +806,8 @@ MODULE_AUTHOR("Chris Elston <celston@xxxxxxxxxxx>");
> MODULE_DESCRIPTION("L2TP IP encapsulation for IPv6");
> MODULE_VERSION("1.0");
>
> -/* Use the value of SOCK_DGRAM (2) directory, because __stringify doesn't like
> - * enums
> +/* Use the values of SOCK_DGRAM (2) as type and IPPROTO_L2TP (115) as protocol,
> + * because __stringify doesn't like enums
> */
> -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, 115, 2);
> +MODULE_ALIAS_NET_PF_PROTO(PF_INET6, 115);
> --
> 2.39.2
