linux-kernel - Re: [PATCH v2] libbpf: Clean up legacy bpf maps declaration in bpf

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Date:   Fri, 9 Sep 2022 17:44:00 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     "Liuxin(EulerOS)" <liuxin350@...wei.com>
Cc:     "andrii@...nel.org" <andrii@...nel.org>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        "ast@...nel.org" <ast@...nel.org>,
        "martin.lau@...ux.dev" <martin.lau@...ux.dev>,
        "song@...nel.org" <song@...nel.org>, "yhs@...com" <yhs@...com>,
        "john.fastabend@...il.com" <john.fastabend@...il.com>,
        "kpsingh@...nel.org" <kpsingh@...nel.org>,
        "sdf@...gle.com" <sdf@...gle.com>,
        "haoluo@...gle.com" <haoluo@...gle.com>,
        "jolsa@...nel.org" <jolsa@...nel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "854182924@...com" <854182924@...com>,
        "Yanan (Euler)" <yanan@...wei.com>,
        "Wuchangye (EulerOS)" <wuchangye@...wei.com>,
        Xiesongyang <xiesongyang@...wei.com>,
        "zhudi (E)" <zhudi2@...wei.com>,
        "kongweibin (A)" <kongweibin2@...wei.com>
Subject: Re: [PATCH v2] libbpf: Clean up legacy bpf maps declaration in bpf_helpers

On Tue, Sep 6, 2022 at 7:51 PM Liuxin(EulerOS) <liuxin350@...wei.com> wrote:
>
> Legacy bpf maps declaration were no longer supported in Libbpf 1.0, so it was time to remove the definition of bpf_map_def in bpf_helpers.h.

please make sure that commit log lines are wrapped at <80 characters
>
> LINK:[1] https://github.com/libbpf/libbpf/wiki/Libbpf:-the-road-to-v1.0

don't add "LINK", just two spaces and then [0] and then refer to it
from the above as "supported in Libbpf 1.0 ([0])"


>
> Acked-by: Song Liu <song@...nel.org>
> Signed-off-by: Xin Liu<liuxin350@...wei.com>

space after name and before opening < is missing

> ---
> Changes in v2:
>     - Fix strange signatures
>

It looks good overall, but your patch doesn't apply. Please make sure
you base it on top of bpf-next's master and you use git send-email
which won't clobber the patch. Thanks.

> V1: https://lore.kernel.org/bpf/CAPhsuW7Em6q5hqiKWEZpJOaU5DTrZE+BPPHq+Chyz0-+-yQ_ZA@mail.gmail.com/T/#t
>
> tools/lib/bpf/bpf_helpers.h | 12 ------------
> 1 file changed, 12 deletions(-)
>
> diff --git a/tools/lib/bpf/bpf_helpers.h b/tools/lib/bpf/bpf_helpers.h index 867b73483..9cad13e7f 100644
> --- a/tools/lib/bpf/bpf_helpers.h
> +++ b/tools/lib/bpf/bpf_helpers.h
> @@ -167,18 +167,6 @@ bpf_tail_call_static(void *ctx, const void *map, const __u32 slot) } #endif
>
> -/*
> - * Helper structure used by eBPF C program
> - * to describe BPF map attributes to libbpf loader
> - */
> -struct bpf_map_def {
> -       unsigned int type;
> -       unsigned int key_size;
> -       unsigned int value_size;
> -       unsigned int max_entries;
> -       unsigned int map_flags;
> -} __attribute__((deprecated("use BTF-defined maps in .maps section")));
> -
> enum libbpf_pin_type {
>         LIBBPF_PIN_NONE,
>         /* PIN_BY_NAME: pin maps by name (in /sys/fs/bpf by default) */
> --
> 2.33.0