netdev - Re: [PATCH 2/5] libbpf: add missing typedef

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Message-ID: <20190520165322.GH10244@mini-arch>
Date:   Mon, 20 May 2019 09:53:22 -0700
From:   Stanislav Fomichev <sdf@...ichev.me>
To:     Matteo Croce <mcroce@...hat.com>
Cc:     xdp-newbies@...r.kernel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>
Subject: Re: [PATCH 2/5] libbpf: add missing typedef

On 05/18, Matteo Croce wrote:
> Sync tools/include/linux/types.h with the UAPI one to fix this build error:
> 
> make -C samples/bpf/../../tools/lib/bpf/ RM='rm -rf' LDFLAGS= srctree=samples/bpf/../../ O=
>   HOSTCC  samples/bpf/sock_example
> In file included from samples/bpf/sock_example.c:27:
> /usr/include/linux/ip.h:102:2: error: unknown type name ‘__sum16’
>   102 |  __sum16 check;
>       |  ^~~~~~~
> make[2]: *** [scripts/Makefile.host:92: samples/bpf/sock_example] Error 1
> make[1]: *** [Makefile:1763: samples/bpf/] Error 2
> 
> Signed-off-by: Matteo Croce <mcroce@...hat.com>
> ---
>  tools/include/linux/types.h | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/tools/include/linux/types.h b/tools/include/linux/types.h
> index 154eb4e3ca7c..5266dbfee945 100644
> --- a/tools/include/linux/types.h
> +++ b/tools/include/linux/types.h
> @@ -58,6 +58,9 @@ typedef __u32 __bitwise __be32;
>  typedef __u64 __bitwise __le64;
>  typedef __u64 __bitwise __be64;
>  
> +typedef __u16 __bitwise __sum16;
> +typedef __u32 __bitwise __wsum;
If you do that, you should probably remove 'typedef __u16 __sum16;'
from test_progs.h:

https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/tree/tools/testing/selftests/bpf/test_progs.h#n13

> +
>  typedef struct {
>  	int counter;
>  } atomic_t;
> -- 
> 2.21.0
>