From patchwork Mon Dec 11 20:20:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Xu X-Patchwork-Id: 753303 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=dxuuu.xyz header.i=@dxuuu.xyz header.b="BHKcWMQa"; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="z1V0zJn5" Received: from out4-smtp.messagingengine.com (out4-smtp.messagingengine.com [66.111.4.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9DBE4C4; Mon, 11 Dec 2023 12:20:32 -0800 (PST) Received: from compute6.internal (compute6.nyi.internal [10.202.2.47]) by mailout.nyi.internal (Postfix) with ESMTP id 57F015C03B9; Mon, 11 Dec 2023 15:20:29 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute6.internal (MEProxy); Mon, 11 Dec 2023 15:20:29 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dxuuu.xyz; h=cc :cc:content-transfer-encoding:content-type:date:date:from:from :in-reply-to:message-id:mime-version:reply-to:sender:subject :subject:to:to; s=fm3; t=1702326029; x=1702412429; bh=1LpLS1VeE5 3pmJfvPFkbIaa6I4cSdrZgdy4B9FeKti0=; b=BHKcWMQaz4kdz0P9KrZj9tMljJ RpPJGDUGJr9DZLXC1QaVVSNcPPkPUSc99kZzUGHVbUavFvpgjxLKmqyAVc2qqkoJ XJw1QqiffmqvjmsMXGz2A445jgl8izocAknqfYfCKvLV831miPjNlzJaPvW7Uri0 S+8kUU9qzr2eDkyI8tUYdiacKAKgA00/ds1wjgvL34j1/kgsySaFLviiOAbD6g44 gZcEHV/OAi8iEsuDvimEZ63SZ6zHWamTjdxRX/LryDd8bRfsqAR3370Wfy8YGSkM 5MU6VP0jS3BhAMK9TyaiOHG8jDru8zdlUly2y55rQSYo1D4l3+ExBVXgiOCA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding :content-type:date:date:feedback-id:feedback-id:from:from :in-reply-to:message-id:mime-version:reply-to:sender:subject :subject:to:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm1; t=1702326029; x=1702412429; bh=1LpLS1VeE53pm JfvPFkbIaa6I4cSdrZgdy4B9FeKti0=; b=z1V0zJn54JcQuSexGk6Ou7cLDXtLl eMmFguAAi68QbXZndhoi3zh+CcmjtgLv1xIvUZ7KguND97iJovL+k02LPd6i2JDV vmmazbhQm4bBycdu5vLL+g0kWStyOBKVLugzOMtjAM0kJelwmXQr1WDz9GV0M/EY U2yTdbn1UhymLWLSwI8201Fl9vXrxmc7MR8aKOPzpdWgapSCXuEpQevLb9mZDv6k PWVHdegp3v3e+ktQCG2p0fBIAQupDE6QmTEY4fRmjAastKcZyfXkNS7HuTEqXZPb XGC25ULvds3uqAvv40pYmZZ+n62NvAX0Be5rju9lFQaIKY04i4xSVewkA== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvkedrudelvddgudefkecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecufghrlhcuvffnffculddvfedmnecujfgurhephf fvvefufffkofgggfestdekredtredttdenucfhrhhomhepffgrnhhivghlucgiuhcuoegu gihusegugihuuhhurdighiiiqeenucggtffrrghtthgvrhhnpeeikeehudegteevuddthf eilefhjefgueeuueffveevheeggfeufeejfeeuudekfeenucffohhmrghinhepihgvthhf rdhorhhgpdhgihhthhhusgdrtghomhenucevlhhushhtvghrufhiiigvpedtnecurfgrrh grmhepmhgrihhlfhhrohhmpegugihusegugihuuhhurdighiii X-ME-Proxy: Feedback-ID: i6a694271:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Mon, 11 Dec 2023 15:20:27 -0500 (EST) From: Daniel Xu To: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, bpf@vger.kernel.org, llvm@lists.linux.dev, steffen.klassert@secunet.com, antony.antony@secunet.com, alexei.starovoitov@gmail.com, yonghong.song@linux.dev, eddyz87@gmail.com, eyal.birger@gmail.com Cc: devel@linux-ipsec.org Subject: [PATCH bpf-next v5 0/9] Add bpf_xdp_get_xfrm_state() kfunc Date: Mon, 11 Dec 2023 13:20:04 -0700 Message-ID: X-Mailer: git-send-email 2.42.1 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This patchset adds two kfunc helpers, bpf_xdp_get_xfrm_state() and bpf_xdp_xfrm_state_release() that wrap xfrm_state_lookup() and xfrm_state_put(). The intent is to support software RSS (via XDP) for the ongoing/upcoming ipsec pcpu work [0]. Recent experiments performed on (hopefully) reproducible AWS testbeds indicate that single tunnel pcpu ipsec can reach line rate on 100G ENA nics. Note this patchset only tests/shows generic xfrm_state access. The "secret sauce" (if you can really even call it that) involves accessing a soon-to-be-upstreamed pcpu_num field in xfrm_state. Early example is available here [1]. [0]: https://datatracker.ietf.org/doc/draft-ietf-ipsecme-multi-sa-performance/03/ [1]: https://github.com/danobi/xdp-tools/blob/e89a1c617aba3b50d990f779357d6ce2863ecb27/xdp-bench/xdp_redirect_cpumap.bpf.c#L385-L406 Changes from v4: * Fixup commit message for selftest * Set opts->error -ENOENT for !x * Revert single file xfrm + bpf Changes from v3: * Place all xfrm bpf integrations in xfrm_bpf.c * Avoid using nval as a temporary * Rebase to bpf-next * Remove extraneous __failure_unpriv annotation for verifier tests Changes from v2: * Fix/simplify BPF_CORE_WRITE_BITFIELD() algorithm * Added verifier tests for bitfield writes * Fix state leakage across test_tunnel subtests Changes from v1: * Move xfrm tunnel tests to test_progs * Fix writing to opts->error when opts is invalid * Use __bpf_kfunc_start_defs() * Remove unused vxlanhdr definition * Add and use BPF_CORE_WRITE_BITFIELD() macro * Make series bisect clean Changes from RFCv2: * Rebased to ipsec-next * Fix netns leak Changes from RFCv1: * Add Antony's commit tags * Add KF_ACQUIRE and KF_RELEASE semantics Daniel Xu (9): bpf: xfrm: Add bpf_xdp_get_xfrm_state() kfunc bpf: xfrm: Add bpf_xdp_xfrm_state_release() kfunc libbpf: Add BPF_CORE_WRITE_BITFIELD() macro bpf: selftests: test_loader: Support __btf_path() annotation bpf: selftests: Add verifier tests for CO-RE bitfield writes bpf: selftests: test_tunnel: Setup fresh topology for each subtest bpf: selftests: test_tunnel: Use vmlinux.h declarations bpf: selftests: Move xfrm tunnel test to test_progs bpf: xfrm: Add selftest for bpf_xdp_get_xfrm_state() include/net/xfrm.h | 9 + net/xfrm/Makefile | 1 + net/xfrm/xfrm_policy.c | 2 + net/xfrm/xfrm_state_bpf.c | 130 ++++++++++++++ tools/lib/bpf/bpf_core_read.h | 32 ++++ .../selftests/bpf/prog_tests/test_tunnel.c | 162 +++++++++++++++++- .../selftests/bpf/prog_tests/verifier.c | 2 + tools/testing/selftests/bpf/progs/bpf_misc.h | 1 + .../selftests/bpf/progs/bpf_tracing_net.h | 1 + .../selftests/bpf/progs/test_tunnel_kern.c | 138 ++++++++------- .../bpf/progs/verifier_bitfield_write.c | 100 +++++++++++ tools/testing/selftests/bpf/test_loader.c | 7 + tools/testing/selftests/bpf/test_tunnel.sh | 92 ---------- 13 files changed, 522 insertions(+), 155 deletions(-) create mode 100644 net/xfrm/xfrm_state_bpf.c create mode 100644 tools/testing/selftests/bpf/progs/verifier_bitfield_write.c