netdev - Re: [PATCH bpf v2 4/4] selftests/bpf: Add netkit test for pkt

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Date: Sat, 25 May 2024 10:55:48 -0700
From: Alexei Starovoitov <alexei.starovoitov@...il.com>
To: Martin KaFai Lau <martin.lau@...ux.dev>
Cc: Daniel Borkmann <daniel@...earbox.net>, Nikolay Aleksandrov <razor@...ckwall.org>, bpf <bpf@...r.kernel.org>, 
	Network Development <netdev@...r.kernel.org>
Subject: Re: [PATCH bpf v2 4/4] selftests/bpf: Add netkit test for pkt_type

On Fri, May 24, 2024 at 3:05 PM Martin KaFai Lau <martin.lau@...ux.dev> wrote:
>
> On 5/24/24 9:36 AM, Daniel Borkmann wrote:
> > diff --git a/tools/testing/selftests/bpf/progs/test_tc_link.c b/tools/testing/selftests/bpf/progs/test_tc_link.c
> > index 992400acb957..b64fcb70ef2f 100644
> > --- a/tools/testing/selftests/bpf/progs/test_tc_link.c
> > +++ b/tools/testing/selftests/bpf/progs/test_tc_link.c
> > @@ -4,6 +4,7 @@
> >
> >   #include <linux/bpf.h>
> >   #include <linux/if_ether.h>
> > +#include <linux/if_packet.h>
>
> The set looks good.
>
> A minor thing is that I am hitting this compilation issue in my environment:
>
> In file included from progs/test_tc_link.c:7:
> In file included from /usr/include/linux/if_packet.h:5:
> In file included from /usr/include/asm/byteorder.h:5:
> In file included from /usr/include/linux/byteorder/little_endian.h:13:
> /usr/include/linux/swab.h:136:8: error: unknown type name '__always_inline'
>    136 | static __always_inline unsigned long __swab(const unsigned long y)
>        |        ^
>
> Adding '#include <linux/stddef.h>' solved it. If the addition is fine, this can
> be adjusted before landing.

I hit the same build issue. So added stddef.h before if_packet.h as
Martin suggested before applying.