netdev - Re: more bpf samples build breakage...

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Date:   Mon, 01 May 2017 16:45:26 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     daniel@...earbox.net
Cc:     netdev@...r.kernel.org
Subject: Re: more bpf samples build breakage...

From: Daniel Borkmann <daniel@...earbox.net>
Date: Mon, 01 May 2017 22:38:58 +0200

> BPF samples:
> 
> [root@...c bpf]# make > /dev/null
> In file included from
> /root/cilium/net-next/samples/bpf/cookie_uid_helper_example.c:54:0:
> /root/cilium/net-next/samples/bpf/cookie_uid_helper_example.c: In
> function ‘prog_load’:
> /root/cilium/net-next/samples/bpf/cookie_uid_helper_example.c:119:5:
> warning: overflow in implicit constant conversion [-Woverflow]
>      -32 + offsetof(struct stats, uid)),
>      ^
> /root/cilium/net-next/samples/bpf/libbpf.h:135:12: note: in definition
> of macro ‘BPF_STX_MEM’
>    .off   = OFF,     \
>             ^
> /root/cilium/net-next/samples/bpf/cookie_uid_helper_example.c:121:5:
> warning: overflow in implicit constant conversion [-Woverflow]
>      -32 + offsetof(struct stats, packets), 1),
>      ^
> /root/cilium/net-next/samples/bpf/libbpf.h:155:12: note: in definition
> of macro ‘BPF_ST_MEM’
>    .off   = OFF,     \
>             ^
> /root/cilium/net-next/samples/bpf/cookie_uid_helper_example.c:129:5:
> warning: overflow in implicit constant conversion [-Woverflow]
>      -32 + offsetof(struct stats, bytes)),
>      ^
> /root/cilium/net-next/samples/bpf/libbpf.h:135:12: note: in definition
> of macro ‘BPF_STX_MEM’
>    .off   = OFF,     \
>             ^
> [root@...c bpf]#
> 
> Above warning is from 51570a5ab2b7 ("A Sample of using socket
> cookie and uid for traffic monitoring"). I can see to send a
> fix for it.

Please do, thanks.