From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f202.google.com (mail-dy1-f202.google.com [74.125.82.202]) (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 9FCFD30EF62 for ; Wed, 25 Feb 2026 21:08:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772053724; cv=none; b=GblFxp1rKKU9RYPKvTlAavWhYCMHQd+taxau4N21vjKVTTcKpCnZ8dMzOdEsPaG8i+B0C9RxkuTAWXzn7qj2Lpwv25qCpVWARQfaGFVGKyNYHda7QzZgaVLLjTbnAP6Z6AvKWJV6H8kAfRhOHHeJ6Th0MxsJ7Kf79Y5a/78ePrw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772053724; c=relaxed/simple; bh=/8Vcz1prEbRK+dIJdMqcAygK+LDRxlZV6UmQxwtSlYQ=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=P+Wg3yUchVOCDeljonTlGijxhE6nnfgX5fJrZUjHHWBlEzBHy+GUiRePWY79fIAiJM1uiIK9Y2ZmFFf2s79PPwu8waziISPz0LtZWceSK28k9/AdqEsE2hYN+6csDgiwGd2IH3aVoHIhe9Ko3718OM7iVo35MZRJiO5GGL1Q8Sg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--wusamuel.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=jTYvnq2N; arc=none smtp.client-ip=74.125.82.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--wusamuel.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="jTYvnq2N" Received: by mail-dy1-f202.google.com with SMTP id 5a478bee46e88-2bdc1b30ac8so1825442eec.1 for ; Wed, 25 Feb 2026 13:08:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1772053723; x=1772658523; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=Of03JtVBl6x9wrND6zq4YBe9ooyHXbISaWzBe270tkw=; b=jTYvnq2NOJPbiEVPcuPQtz4ou84naqzmPYPlmrMJh19Z3LruJxrPhceojkvjXAqnty cgxO/uEgYkvRYT2sZuW9H29yluxXZXmDP5NWIiVQ0xqZR0uELgrRB9ca18ByKCZ2itEq o2JGwOruYlpB7RBTHPRgRKUBbR2HmS83DZdxyNWU8m99yzniH6geHlVCpKg5jYQz7sd+ Nvp/TzurpDejQ1cvcanYHpRL7DMjDfQqom5VDAO0IA9PX1iXlQUZNkQ78Owhbj85Bl4H Dt8N5I4NdJTttLUK9Gs1dULHnDT/mUdLi07U8TSz0NyPhS+rKaxlwQW93eRfphceOJZn uZHQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772053723; x=1772658523; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Of03JtVBl6x9wrND6zq4YBe9ooyHXbISaWzBe270tkw=; b=lNMftvkTdtm9RfB9DC/fxOv04n9Om6cLputpdJ85Eslx2RLBAefj8T08u9ztoGRuo+ 9gL2tx3RDw73JE0GyEXrPvHJQwPZFcNy0fh0j1fpmBaVcy7yu5cvy0uZLo0ljXHEz2tf POb61IdFX9pMctARTbmXUwKH7CiUcj3xmq5lJWMyShrFrG6WlPTPna9rul71CpowAd8P TLvMD9bexOPy3/lJTgczCkIqwvvhq6yTGz8CPHo0AzQWmI3l2Y7N2Otfe/NlSy+Dnnf6 Ft8Ku9WDIWZ1JcFFDcK0+q5UU2Dgk6sX+XoUnfWWymO4qEBH+2limLV85PKVFXpg9LIu ztjg== X-Forwarded-Encrypted: i=1; AJvYcCVJ3pPmPxivK20URLjkeG2loRSCJdd9e9VOwOLLu0Zc7TMr3TZe61vfEHUJ4Gr4b4ktp7SRPTf7j7HtzDzs0TU=@vger.kernel.org X-Gm-Message-State: AOJu0YzLuofSF5ZKmWAHoQRig71uTR2OBaDVLMN80xUTUNbUq24vG8fx jwFNkIozWmwI5AIWM41mgXctZzj43mTrSIWVsC5K9XT7obRqlq4Bfi29/LsyM3ohAQHEX3JZCiG cC8pimH0yRs2Xww== X-Received: from dydb17.prod.google.com ([2002:a05:7300:80d1:b0:2ba:acf0:ab76]) (user=wusamuel job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7300:23cc:b0:2ba:a440:79b0 with SMTP id 5a478bee46e88-2bd7bd711b5mr9002146eec.36.1772053722568; Wed, 25 Feb 2026 13:08:42 -0800 (PST) Date: Wed, 25 Feb 2026 13:08:16 -0800 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.53.0.473.g4a7958ca14-goog Message-ID: <20260225210820.177674-1-wusamuel@google.com> Subject: [PATCH bpf-next v5 0/2] Add wakeup_source iterators From: Samuel Wu To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Shuah Khan Cc: Samuel Wu , kernel-team@android.com, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org Content-Type: text/plain; charset="UTF-8" This patch series introduces BPF iterators for wakeup_source, enabling BPF programs to efficiently traverse a device's wakeup sources. Currently, inspecting wakeup sources typically involves reading interfaces like /sys/class/wakeup/* or debugfs. The repeated syscalls to query the sysfs nodes is inefficient, as there can be hundreds of wakeup_sources, and each wakeup source have multiple stats, with one sysfs node per stat. debugfs is unstable and insecure. The iterators utilize pre-existing wakeup_sources_walk_* functions to traverse over the SRCU that backs the list of wakeup_sources. Changes in v5: - Add CORE definitions for *__local variables to fix s390 build per bpf-ci - v4 link: https://lore.kernel.org/all/20260211235055.239024-1-wusamuel@google.com/ Changes in v4: - Proper init of variables in ws_iter_check_sleep_times() test per bpf-ci - Remove PM patch since it's already part of rebase - v3 link: https://lore.kernel.org/all/20260124012133.2451708-1-wusamuel@google.com/ Changes in v3: - Update wakeup_sources_walk_start() to handle an empty list per bpf-ci - Simplify read of a struct's field in BPF program selftest per Andrii - Drop open coded iterators for wakeup_sources - Fix condition from !get_ws_iter_stream to get_ws_iter_stream in selftest - Read event_count instead of wakeup_count in selftest - v2 link: https://lore.kernel.org/all/20260108225523.3268383-1-wusamuel@google.com/ Changes in v2: - Guard BPF Makefile with CONFIG_PM_SLEEP to fix build errors - Update copyright from 2025 to 2026 - v1 link: https://lore.kernel.org/all/20251204025003.3162056-1-wusamuel@google.com/ Samuel Wu (2): bpf: Add wakeup_source iterator selftests/bpf: Add tests for wakeup_sources kernel/bpf/Makefile | 3 + kernel/bpf/wakeup_source_iter.c | 103 ++++++ tools/testing/selftests/bpf/config | 1 + .../bpf/prog_tests/wakeup_source_iter.c | 300 ++++++++++++++++++ .../selftests/bpf/progs/wakeup_source_iter.c | 80 +++++ 5 files changed, 487 insertions(+) create mode 100644 kernel/bpf/wakeup_source_iter.c create mode 100644 tools/testing/selftests/bpf/prog_tests/wakeup_source_iter.c create mode 100644 tools/testing/selftests/bpf/progs/wakeup_source_iter.c -- 2.53.0.473.g4a7958ca14-goog