Subject: Re: [net-next:master 1077/1082] net/core/filter.c:1824:2: error: implicit declaration of function 'ip_tunnel_info_opts_get'

From: Daniel Borkmann <[email-masked]>
Date: Tue, 08 Mar 2016 21:32:27 +0100

On 03/08/2016 09:20 PM, kbuild test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
> head:   f8b33d8e870758ccff13e5f81fd5050b52a42d35
> commit: 14ca0751c96f8d3d0f52e8ed3b3236f8b34d3460 [1077/1082] bpf: support for access to tunnel options
> config: x86_64-randconfig-i0-03080544 (attached as .config)
> reproduce:
>          git checkout 14ca0751c96f8d3d0f52e8ed3b3236f8b34d3460
>          # save the attached .config to linux build tree
>          make ARCH=x86_64
>
> All errors (new ones prefixed by >>):
>
>     net/core/filter.c: In function 'bpf_skb_get_tunnel_opt':
>>> net/core/filter.c:1824:2: error: implicit declaration of function 'ip_tunnel_info_opts_get' [-Werror=implicit-function-declaration]
>       ip_tunnel_info_opts_get(to, info);
>       ^
>     net/core/filter.c: In function 'bpf_skb_set_tunnel_opt':
>>> net/core/filter.c:1918:2: error: implicit declaration of function 'ip_tunnel_info_opts_set' [-Werror=implicit-function-declaration]
>       ip_tunnel_info_opts_set(info, from, size);
>       ^
>     cc1: some warnings being treated as errors

Hmm, I see, it depends on CONFIG_INET, the rest of tunnel key API apparently not. :/

The attached .config here has:

# CONFIG_INET is not set

I'll send you a follow-up fix.

Thanks,
Daniel