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References: <d79d7eb8-98da-da02-24ad-130c6f88fe87@linux.alibaba.com>
In-Reply-To: <d79d7eb8-98da-da02-24ad-130c6f88fe87@linux.alibaba.com>
From:   Andrii Nakryiko <andrii.nakryiko@gmail.com>
Date:   Fri, 1 Oct 2021 13:52:31 -0700
Message-ID: <CAEf4BzYX7FB-hpn4doNTuW0HtH+c0fmACEYe9Otn1_ge80OPYw@mail.gmail.com>
Subject: Re: How to attach a single bpf_program multiple times?
To:     Shuyi Cheng <chengshuyi@linux.alibaba.com>
Cc:     bpf <bpf@vger.kernel.org>
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On Tue, Sep 28, 2021 at 2:54 AM Shuyi Cheng
<chengshuyi@linux.alibaba.com> wrote:
>
> Hi, everyone!
>
> When the ebpf program is the same, but attach to a different kprobe
> function, I have to recompile the entire program. If the kprobe function
> of bpf_program attach can be specified dynamically, then there is no
> need to modify the original program.

With libbpf you can attach the same bpf_program to multiple kprobes.
Use bpf_program__attach_kprobe() API multiple times with the same
program instance, but different target functions.


>
> Thanks!