linux-kernel - Re: [PATCH 18/23] libbpf: support io

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Date:   Wed, 19 May 2021 10:38:09 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Pavel Begunkov <asml.silence@...il.com>
Cc:     io-uring@...r.kernel.org, Networking <netdev@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Jens Axboe <axboe@...nel.dk>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Horst Schirmeier <horst.schirmeier@...dortmund.de>,
        "Franz-B . Tuneke" <franz-bernhard.tuneke@...dortmund.de>,
        Christian Dietrich <stettberger@...ucode.de>
Subject: Re: [PATCH 18/23] libbpf: support io_uring

On Wed, May 19, 2021 at 7:14 AM Pavel Begunkov <asml.silence@...il.com> wrote:
>
> Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
> ---
>  tools/lib/bpf/libbpf.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
> index 4181d178ee7b..de5d1508f58e 100644
> --- a/tools/lib/bpf/libbpf.c
> +++ b/tools/lib/bpf/libbpf.c
> @@ -13,6 +13,10 @@
>  #ifndef _GNU_SOURCE
>  #define _GNU_SOURCE
>  #endif
> +
> +/* hack, use local headers instead of system-wide */
> +#include "../../../include/uapi/linux/bpf.h"
> +

libbpf is already using the latest UAPI headers, so you don't need
this hack. You just haven't synced include/uapi/linux/bpf.h into
tools/include/uapi/linux/bpf.h

>  #include <stdlib.h>
>  #include <stdio.h>
>  #include <stdarg.h>
> @@ -8630,6 +8634,9 @@ static const struct bpf_sec_def section_defs[] = {
>         BPF_PROG_SEC("struct_ops",              BPF_PROG_TYPE_STRUCT_OPS),
>         BPF_EAPROG_SEC("sk_lookup/",            BPF_PROG_TYPE_SK_LOOKUP,
>                                                 BPF_SK_LOOKUP),
> +       SEC_DEF("iouring/",                     IOURING),
> +       SEC_DEF("iouring.s/",                   IOURING,
> +               .is_sleepable = true),
>  };
>
>  #undef BPF_PROG_SEC_IMPL
> --
> 2.31.1
>