From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f174.google.com (mail-pf1-f174.google.com [209.85.210.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CDDAA3168EE for ; Wed, 4 Mar 2026 14:35:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772634922; cv=none; b=SLnLTnjUsq3qjeCX9Pos8hc8asUWRbSNT1a33CVyChBg65QXDC2CPty3VJmCM7jMjSTmObRzwQPq4C49mxAkV/WV8xbZCaWaiLNgK75kV16rgndvxSlXmQlLeEHb+2NKECX3e56ckRe6ox2DPKZjq1HGSIU3YW7TkRvbIUyuSFA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772634922; c=relaxed/simple; bh=tm9z4rhCez5HLQviad/BMnNVmKmKuVcBpkwCJjwSoVk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=sHqXOqH8YhkJ9pRUKoERUuhgeqOXc7kOWMFnjHGmNiPuPAnmC7MtExiX2rN7fYZa5RLIVurj3G7DQZGz30AtlGVgTSGnVuHPtafqmHIm1OS+UrCg7cLR/oxOQWfKh6fZknLZI0sknIBtooDFyOvjMCh71iFdD/cnNdsI5858V18= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=cCkZjH6K; arc=none smtp.client-ip=209.85.210.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="cCkZjH6K" Received: by mail-pf1-f174.google.com with SMTP id d2e1a72fcca58-81df6a302b1so7440338b3a.2 for ; Wed, 04 Mar 2026 06:35:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1772634920; x=1773239720; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=Ww9Gg44/nr/4wT9Ug3u7VZF84qM0My1cXsMZLyLTfi8=; b=cCkZjH6KDc3rfZSUR97IZCxY49d8uBPWZhxsbCjwQ0OU+Fz/7kydz6KFZ5+w3K82gl bKC2d/JX2B5qZmNgmuBbWi7La1zss6d6CpDdDuqMlqJLISxKGxvofJRydk59cNYyoSc+ cUMKefLrlCsOtfIBOPcmhheOzTqMsZmCGk4Ny2ha/nBuPNF9fqmeGjLzFNnTR16aOd61 1GnnUCGzfbpE7abrI65jCEdDmKljFC21nroxEo5uAjQmiisFwtayfiJ91bL5HhsCO+2D XVxHUT7I55tUT1s4LhYUK4QEeCFJzHpE9PoZuu/r1bS2Ki9IJl29jbuzu7zmazPB7SjE AFAQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772634920; x=1773239720; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=Ww9Gg44/nr/4wT9Ug3u7VZF84qM0My1cXsMZLyLTfi8=; b=l60PcixmBMgyITMOxqsDvWdBYL5QhL4G9jN6J04IRGv3GC76zOhKgG7FlWRAwhLydk qYYtSA/KVs/EC8z8x1nCPLyxqaB3ZGtpuj6NU75YFt5Slw7d9nJP8qXUh/8Btv0D8ETE 6xSxbaBLpYYFNGisfjnFhKnxSgmBxC+LD3TTdhS1fRGAS2NvRwo7ZQ5tIGWPj/pXpnEv uwo90RpEO51YS5BJWNtGRRXcx3n7eGFvb9lBxYLqU7QzyXKmczHNS6bhd0obVHyUtnHj VcSpORqm89Nd5KwZ8I+I1EdR1h9u87vGrUevzBESRuSJb3+fzi+SOJmPMnrKsUxnbety iJqw== X-Forwarded-Encrypted: i=1; AJvYcCW5vIJvw5mTszDJJt7EmMkag1iXjC9nheJxmm2DKbFZef+IlBMYgFctntgzAZDv/MTF6iKOI6kxE8HO3hc=@vger.kernel.org X-Gm-Message-State: AOJu0Yx0ctqKTd2wzEtnev9jRHf2mQsYWb49dwwdoiEXYgGoB4EHdsWF V1HQP9is9lvBc85qVGY1jBH+afOgy8Nvah1maWAb9jsf5D6l2JFwIbzM X-Gm-Gg: ATEYQzx3tO+58EfQyPkxhITvvG2f2D/c65Avi+ZniTgeI5Ka34n81Dj26j/KpnfCQAJ KaA18NxJ/0oW1VjLAB7ze3R3iu8ftR23h9tAGVt5aRLFdAVFiiw//YZVTme1pzTKcKmJV8caI5w jIUwDn2fOVZzqsng2HHy38OS1XnV/zgG4SW+l9GKNNjKwLsrS1OmDRZJS5vMKLQ/7paeFrshSja 0hWswzKyw59QhDwHzoaypXnv+OgPH9cBerh8YZitG4Amy3ELSEPuJIeAr1BPPcv0riUW0GZJ9x0 LaAuPabhMi0XlaSpJliE09koAagaug5mY8B6ADnaKcOugrkUdgYreI8wKLyjMw3cQ1FuK8utBga iUhMZLrJM9AnwrnslsnFthkUFe54Yv0kOtK4GcpCVKKHOSeWndFxM7Z81oGF40rk3L7tA9e7mN/ wigDvNy1uJLwh1LeLN4/4owizx+n7043QzIzk81vdk2G3Anu7D02HMvw== X-Received: by 2002:a05:6a00:94cf:b0:823:1d04:e280 with SMTP id d2e1a72fcca58-82972b5e2camr1819011b3a.22.1772634920093; Wed, 04 Mar 2026 06:35:20 -0800 (PST) Received: from localhost.localdomain ([113.218.252.150]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82739d87e4csm18470184b3a.15.2026.03.04.06.35.05 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Wed, 04 Mar 2026 06:35:19 -0800 (PST) From: Chengkaitao To: martin.lau@linux.dev, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, shuah@kernel.org, chengkaitao@kylinos.cn, linux-kselftest@vger.kernel.org Cc: bpf@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v6 0/5] bpf: Extend the bpf_list family of APIs Date: Wed, 4 Mar 2026 22:34:54 +0800 Message-ID: <20260304143459.78059-1-pilgrimtao@gmail.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Kaitao Cheng 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. The patches enhance the BPF list API, making it more list-like. Four new kfuncs have been added: bpf_list_del: remove a node from the list bpf_list_add_impl: insert a node after a given list node bpf_list_node_is_edge: check if a node is the first or last in the list bpf_list_empty: check if the list is empty refactor kfunc checks to table-driven approach, and add test cases for the aforementioned kfuncs. Changes in v6: - Merge [patch v5 (2,4,6)/6] into [patch v6 4/5] - If list_head was 0-initialized, init it - refactor kfunc checks to table-driven approach Changes in v5: - Fix bpf_obj leak on bpf_list_add_impl error Changes in v4: - [patch v3 1/6] Revert to version v1 - Change the parameters of bpf_list_add_impl to (head, new, prev, ...) Changes in v3: - Add a new lock_rec member to struct bpf_reference_state for lock holding detection. - Add test cases to verify that the verifier correctly restricts calls to bpf_list_del when the spin_lock is not held. Changes in v2: - Remove the head parameter from bpf_list_del - Add bpf_list_add/is_first/is_last/empty to API and test cases Link to v5: https://lore.kernel.org/all/20260304031606.43884-1-pilgrimtao@gmail.com/ Link to v4: https://lore.kernel.org/all/20260303135219.33726-1-pilgrimtao@gmail.com/ Link to v3: https://lore.kernel.org/all/20260302124028.82420-1-pilgrimtao@gmail.com/ Link to v2: https://lore.kernel.org/all/20260225092651.94689-1-pilgrimtao@gmail.com/ Link to v1: https://lore.kernel.org/all/20260209025250.55750-1-pilgrimtao@gmail.com/ Kaitao Cheng (5): bpf: Introduce the bpf_list_del kfunc. bpf: Add bpf_list_add_impl to insert node after a given list node bpf: Add bpf_list_is_edge/empty kfuncs selftests/bpf: Add test cases for bpf_list_del/add/is_edge/empty bpf/verifier: refactor kfunc checks to table-driven approach kernel/bpf/helpers.c | 98 ++++++++++ kernel/bpf/verifier.c | 103 +++++++--- .../testing/selftests/bpf/bpf_experimental.h | 39 ++++ .../selftests/bpf/progs/refcounted_kptr.c | 182 ++++++++++++++++++ 4 files changed, 398 insertions(+), 24 deletions(-) -- 2.50.1 (Apple Git-155)