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Subject: Re: [PATCHv4 bpf-next 3/6] bpf: Add link_info support for uprobe
 multi link
Content-Language: en-GB
To: Jiri Olsa <jolsa@kernel.org>, Alexei Starovoitov <ast@kernel.org>,
 Daniel Borkmann <daniel@iogearbox.net>, Andrii Nakryiko <andrii@kernel.org>
Cc: bpf@vger.kernel.org, Martin KaFai Lau <kafai@fb.com>,
 Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
 John Fastabend <john.fastabend@gmail.com>, KP Singh <kpsingh@chromium.org>,
 Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>,
 Yafang Shao <laoar.shao@gmail.com>
References: <20231125193130.834322-1-jolsa@kernel.org>
 <20231125193130.834322-4-jolsa@kernel.org>
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From: Yonghong Song <yonghong.song@linux.dev>
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On 11/25/23 2:31 PM, Jiri Olsa wrote:
> Adding support to get uprobe_link details through bpf_link_info
> interface.
>
> Adding new struct uprobe_multi to struct bpf_link_info to carry
> the uprobe_multi link details.
>
> The uprobe_multi.count is passed from user space to denote size
> of array fields (offsets/ref_ctr_offsets/cookies). The actual
> array size is stored back to uprobe_multi.count (allowing user
> to find out the actual array size) and array fields are populated
> up to the user passed size.
>
> All the non-array fields (path/count/flags/pid) are always set.
>
> Signed-off-by: Jiri Olsa <jolsa@kernel.org>

Acked-by: Yonghong Song <yonghong.song@linux.dev>