linux-kernel - [PATCH 0/2] bpf: Introduce the bpf_list

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Message-ID: <20260209025250.55750-1-pilgrimtao@gmail.com>
Date: Mon,  9 Feb 2026 10:52:48 +0800
From: Chengkaitao <pilgrimtao@...il.com>
To: ast@...nel.org,
	daniel@...earbox.net,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	eddyz87@...il.com,
	song@...nel.org,
	yonghong.song@...ux.dev,
	john.fastabend@...il.com,
	kpsingh@...nel.org,
	sdf@...ichev.me,
	haoluo@...gle.com,
	jolsa@...nel.org,
	shuah@...nel.org
Cc: chengkaitao@...inos.cn,
	leon.hwang@...ux.dev,
	bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org
Subject: [PATCH 0/2] bpf: Introduce the bpf_list_del API

From: Kaitao Cheng <chengkaitao@...inos.cn>

In BPF, a list can only be used to implement a stack structure.
Due to an incomplete API set, only FIFO or LIFO operations are
supported.

We propose introducing the bpf_list_del API, which allows users
to directly remove a node from the list if the node pointer is
obtained beforehand. This patch enhances the BPF list API,
making it more list-like.

Kaitao Cheng (2):
  bpf: Introduce the bpf_list_del kfunc.
  selftests/bpf: Add test cases for bpf_list_del

 kernel/bpf/helpers.c                          | 19 +++++++++
 kernel/bpf/verifier.c                         |  6 ++-
 .../testing/selftests/bpf/bpf_experimental.h  | 11 +++++
 .../selftests/bpf/progs/refcounted_kptr.c     | 41 +++++++++++++++++++
 4 files changed, 76 insertions(+), 1 deletion(-)

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