linux-kernel - Re: [PATCH bpf-next v4] bpftool: Add support for custom BTF path in prog load/loadall

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Message-ID: <addf5c1e-9e78-4eb4-902e-06476dc79c90@kernel.org>
Date: Fri, 16 May 2025 15:54:15 +0100
From: Quentin Monnet <qmo@...nel.org>
To: Jiayuan Chen <jiayuan.chen@...ux.dev>, bpf@...r.kernel.org
Cc: Alexei Starovoitov <ast@...nel.org>,
 Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>,
 Martin KaFai Lau <martin.lau@...ux.dev>, Eduard Zingerman
 <eddyz87@...il.com>, Song Liu <song@...nel.org>,
 Yonghong Song <yonghong.song@...ux.dev>,
 John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...nel.org>,
 Stanislav Fomichev <sdf@...ichev.me>, Hao Luo <haoluo@...gle.com>,
 Jiri Olsa <jolsa@...nel.org>, Daniel Xu <dxu@...uu.xyz>,
 Tao Chen <chen.dylane@...il.com>, Mykyta Yatsenko <yatsenko@...a.com>,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf-next v4] bpftool: Add support for custom BTF path in
 prog load/loadall

2025-05-16 22:47 UTC+0800 ~ Jiayuan Chen <jiayuan.chen@...ux.dev>
> This patch exposes the btf_custom_path feature to bpftool, allowing users
> to specify a custom BTF file when loading BPF programs using prog load or
> prog loadall commands.
> 
> The argument 'btf_custom_path' in libbpf is used for those kernels that
> don't have CONFIG_DEBUG_INFO_BTF enabled but still want to perform CO-RE
> relocations.
> 
> Suggested-by: Quentin Monnet <qmo@...nel.org>
> Reviewed-by: Quentin Monnet <qmo@...nel.org>

Thanks!
Quentin