From patchwork Mon Mar 18 18:40:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 13595715 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 290972E400 for ; Mon, 18 Mar 2024 18:40:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710787240; cv=none; b=CmpInA5TNRQwTwrswHIn0sgKNZyEAASoLDtgvLtfPMBc8rKtIz6iLNVqqS0+EBZq1629rpfJeIigfv2QhH1f2bp2S9r6L+uAOPFE97UFMg8ZcmNoLfhTFtwxeWkILvdFZma8shB7Ljgux3tp3foaKeZ27x1CHz6LG8ootB/qsOo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710787240; c=relaxed/simple; bh=pvQvJAka8X5x84Ei5v5G031/Ffjx7sKygBO+UBVzahY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=elYnUdeMPqrkxbIFajUDB3DprzBxXGSYKYASgU50C3GvlmE6jyPufWfXI0XCL+ZcDq7QzKTKFM21WIraMoVtPKwAHjtdYwpe69O1XlpOrzqVVImNPyq0t6fkJn1NL+2lGIniutitVC+knB0PC6s3XoO7DBbDu2isZBUkX6Hs5jo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IRO/GEBP; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="IRO/GEBP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6327CC43394; Mon, 18 Mar 2024 18:40:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710787239; bh=pvQvJAka8X5x84Ei5v5G031/Ffjx7sKygBO+UBVzahY=; h=From:To:Cc:Subject:Date:From; b=IRO/GEBPERm9Fbb1Gd+mahrBJO0cF09FPYP8LBks93WCOEK3lTU9FMQBaKuq0Wpod YT6ST9kuyQ7z2bYZulY1Oc/snnFkFychW4VgpD7Ejlb1JqgvKPKBTY3t39quwWHLhf 4fosDIYqT2/EB5l0zuH96eptWjdU2AKzCma2SLsUMfjRAm2SUeIa5xCEYU7JmogNtH aqrCb2Be25fgPkm8NmC6qan1hGo7UaOj97zpK4yYy4uFaYiGf60vlAzbsLHsqBzFxM 8eZdGa4sr53bgb7s9w1OtgOAulUzKkPF+D43RhCcqZt9EEpqOkWz+ZAHrbSOrWmPKp 4HtyG5+SQSjag== From: Andrii Nakryiko To: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, martin.lau@kernel.org Cc: andrii@kernel.org, kernel-team@meta.com Subject: [PATCH v2 bpf-next 0/5] BPF raw tracepoint support for BPF cookie Date: Mon, 18 Mar 2024 11:40:32 -0700 Message-ID: <20240318184037.3209242-1-andrii@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net Add ability to specify and retrieve BPF cookie for raw tracepoint programs. Both BTF-aware (SEC("tp_btf")) and non-BTF-aware (SEC("raw_tp")) are supported, as they are exactly the same at runtime. This issue recently came up in production use cases, where custom tried to switch from slower classic tracepoints to raw tracepoints and ran into this limitation. Luckily, it's not that hard to support this for raw_tp programs. v1->v2: - fixed type definition for stubs of bpf_probe_{register,unregister}; - added __u32 :u32 and aligned raw_tp fields (Jiri); - added Stanislav's ack. Andrii Nakryiko (5): bpf: flatten bpf_probe_register call chain bpf: pass whole link instead of prog when triggering raw tracepoint bpf: support BPF cookie in raw tracepoint (raw_tp, tp_btf) programs libbpf: add support for BPF cookie for raw_tp/tp_btf programs selftests/bpf: add raw_tp/tp_btf BPF cookie subtests include/linux/bpf.h | 6 + include/linux/trace_events.h | 36 +++--- include/trace/bpf_probe.h | 3 +- include/uapi/linux/bpf.h | 6 +- kernel/bpf/syscall.c | 22 ++-- kernel/trace/bpf_trace.c | 36 ++++-- tools/include/uapi/linux/bpf.h | 1 + tools/lib/bpf/bpf.c | 16 ++- tools/lib/bpf/bpf.h | 9 ++ tools/lib/bpf/libbpf.c | 20 ++- tools/lib/bpf/libbpf.h | 11 ++ tools/lib/bpf/libbpf.map | 2 + .../selftests/bpf/prog_tests/bpf_cookie.c | 114 +++++++++++++++++- .../selftests/bpf/progs/test_bpf_cookie.c | 16 +++ 14 files changed, 248 insertions(+), 50 deletions(-)