linux-kernel - Re: [PATCH bpf-next v10 5/8] bpf: Add syscall common attributes support for btf

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Message-ID: <CAEf4BzY3GA+860RODLaXqqO3j5AgJ24pmKU1yv3+gHJpy0DvNA@mail.gmail.com>
Date: Wed, 11 Feb 2026 14:11:15 -0800
From: Andrii Nakryiko <andrii.nakryiko@...il.com>
To: Leon Hwang <leon.hwang@...ux.dev>
Cc: bpf@...r.kernel.org, Alexei Starovoitov <ast@...nel.org>, 
	Daniel Borkmann <daniel@...earbox.net>, John Fastabend <john.fastabend@...il.com>, 
	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>, KP Singh <kpsingh@...nel.org>, 
	Stanislav Fomichev <sdf@...ichev.me>, Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>, 
	Shuah Khan <shuah@...nel.org>, Christian Brauner <brauner@...nel.org>, 
	Seth Forshee <sforshee@...nel.org>, Yuichiro Tsuji <yuichtsu@...zon.com>, 
	Andrey Albershteyn <aalbersh@...hat.com>, Willem de Bruijn <willemb@...gle.com>, 
	Jason Xing <kerneljasonxing@...il.com>, Tao Chen <chen.dylane@...ux.dev>, 
	Mykyta Yatsenko <yatsenko@...a.com>, Kumar Kartikeya Dwivedi <memxor@...il.com>, 
	Anton Protopopov <a.s.protopopov@...il.com>, Amery Hung <ameryhung@...il.com>, 
	Rong Tao <rongtao@...tc.cn>, linux-kernel@...r.kernel.org, linux-api@...r.kernel.org, 
	linux-kselftest@...r.kernel.org, kernel-patches-bot@...com
Subject: Re: [PATCH bpf-next v10 5/8] bpf: Add syscall common attributes
 support for btf_load

On Wed, Feb 11, 2026 at 7:13 AM Leon Hwang <leon.hwang@...ux.dev> wrote:
>
> BPF_BTF_LOAD can now take log parameters from both union bpf_attr and
> struct bpf_common_attr, with the same merge rules as BPF_PROG_LOAD:
>
> - if both sides provide a complete log tuple (buf/size/level) and they
>   match, use it;
> - if only one side provides log parameters, use that one;
> - if both sides provide complete tuples but they differ, return -EINVAL.
>
> Signed-off-by: Leon Hwang <leon.hwang@...ux.dev>
> ---
>  include/linux/btf.h  |  3 ++-
>  kernel/bpf/btf.c     | 30 +++++++-----------------------
>  kernel/bpf/syscall.c | 11 ++++++++---
>  3 files changed, 17 insertions(+), 27 deletions(-)
>

same remark about user space only log_true_size, but overall LGTM

Acked-by: Andrii Nakryiko <andrii@...nel.org>

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