linux-kernel - Re: [PATCH bpf-next v5 1/2] bpf: support BPF_PROG

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Message-ID: <ef670dc7-e3c9-ad89-dc8b-5cbd1910b38c@fb.com>
Date:   Thu, 4 Nov 2021 21:23:51 -0700
From:   Yonghong Song <yhs@...com>
To:     Di Zhu <zhudi2@...wei.com>, <davem@...emloft.net>,
        <ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>,
        <kafai@...com>, <songliubraving@...com>,
        <john.fastabend@...il.com>, <kpsingh@...nel.org>,
        <jakub@...udflare.com>
CC:     <bpf@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf-next v5 1/2] bpf: support BPF_PROG_QUERY for progs
 attached to sockmap



On 11/4/21 6:57 PM, Di Zhu wrote:
> Right now there is no way to query whether BPF programs are
> attached to a sockmap or not.
> 
> we can use the standard interface in libbpf to query, such as:
> bpf_prog_query(mapFd, BPF_SK_SKB_STREAM_PARSER, 0, NULL, ...);
> the mapFd is the fd of sockmap.
> 
> Signed-off-by: Di Zhu <zhudi2@...wei.com>

Acked-by: Yonghong Song <yhs@...com>