linux-kernel - Re: [PATCH] net/mlx5e: fix non-IPV6 build

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Date:   Thu, 3 Dec 2020 15:17:51 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Arnd Bergmann <arnd@...nel.org>,
        Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Tariq Toukan <tariqt@...lanox.com>,
        Maxim Mikityanskiy <maximmi@...lanox.com>
Cc:     Arnd Bergmann <arnd@...db.de>, Boris Pismenny <borisp@...dia.com>,
        Denis Efremov <efremov@...ux.com>, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net/mlx5e: fix non-IPV6 build

On 12/3/20 3:12 PM, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> When IPv6 is disabled, the flow steering code causes a build failure:
> 
> drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c:55:14: error: no member named 'skc_v6_daddr' in 'struct sock_common'; did you mean 'skc_daddr'?
>                &sk->sk_v6_daddr, 16);
>                     ^
> include/net/sock.h:380:34: note: expanded from macro 'sk_v6_daddr'
>  #define sk_v6_daddr             __sk_common.skc_v6_daddr
> 
> Hide the newly added function in an #ifdef that matches its callers
> and the struct member definition.
> 
> Fixes: 5229a96e59ec ("net/mlx5e: Accel, Expose flow steering API for rules add/del")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c
> index 97f1594cee11..e51f60b55daa 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c
> @@ -44,6 +44,7 @@ static void accel_fs_tcp_set_ipv4_flow(struct mlx5_flow_spec *spec, struct sock
>  			 outer_headers.dst_ipv4_dst_ipv6.ipv4_layout.ipv4);
>  }
>  
> +#if IS_ENABLED(CONFIG_IPV6)
>  static void accel_fs_tcp_set_ipv6_flow(struct mlx5_flow_spec *spec, struct sock *sk)
>  {
>  	MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria, outer_headers.ip_protocol);
> @@ -63,6 +64,7 @@ static void accel_fs_tcp_set_ipv6_flow(struct mlx5_flow_spec *spec, struct sock
>  			    outer_headers.dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
>  	       0xff, 16);
>  }
> +#endif
>  
>  void mlx5e_accel_fs_del_sk(struct mlx5_flow_handle *rule)
>  {
> 

Fix for this was just merged by Linus [NETWORKING PR].

thanks.
-- 
~Randy