From patchwork Thu Dec 14 22:49:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Xu X-Patchwork-Id: 754096 Received: from wout1-smtp.messagingengine.com (wout1-smtp.messagingengine.com [64.147.123.24]) (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 9A19D6D1DD; Thu, 14 Dec 2023 22:49:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=dxuuu.xyz Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=dxuuu.xyz Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=dxuuu.xyz header.i=@dxuuu.xyz header.b="V1GB+wpO"; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="sT5D85BD" Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailout.west.internal (Postfix) with ESMTP id 761BC3200B5A; Thu, 14 Dec 2023 17:49:17 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute3.internal (MEProxy); Thu, 14 Dec 2023 17:49:18 -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:subject:subject:to :to; s=fm3; t=1702594156; x=1702680556; bh=ZFh7mAohRzEfC8EAB2/qm p1+GaJriUVMYQQUQ3IIsw8=; b=V1GB+wpOoDak5vL+2MbB2FmZc2tbIaaW7zhcy 3D2sgArYuLnDisYAvIKjdqO8M5yit/3qQVC5y7itqyibMcEChryljNurDW7mczhq 9dKX3MyQOwh3jggs6Q2mw2ugVyHw3a0tGuN31vvH0oRFkVmZpkBoFbemiRpXUosF XNVwt2OQaHHHN3NNR+VwWGnCbrBWvXv22Yyz6nH8rxa1UOCT0nrt107wOQCPOQHl oovqK/b97wdrHa884Dsvs/G6nSNClRonWz3HCAdRhTOa7ZvB63m87KkLN9XTzUDy NPDyml4KsWv4x1nH9O1QfmDxYBsC/bKVXEMEiZkaFzHozEYuQ== 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:subject:subject:to :to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm1; t=1702594156; x=1702680556; bh=ZFh7mAohRzEfC8EAB2/qmp1+GaJr iUVMYQQUQ3IIsw8=; b=sT5D85BD/BhB2O7l+q58viyr2LKs/tpShV89mY3IDL+H ky3ebZThMzW9NXAbxT4fCHAynMZkPGceemU6fgOd0s5A7rcTM2FSlrhrUZmYnbN3 JfgO7d/PRdw98mARIb/6Nc+GK1I2ObS8ihfSVaCIU1GEJvXWkZSAoJnvZrYigclW QoJJCaBTGhDHueU0Qq1nwAnVgv95+tfKm5bMvy50yXP9cpx6u26DO6PUa+KEoJ1V eVkAf0kD2RwzWimOibwovMXRlsb1ltiJA6r8iJgMO6GKkm2Pt9Y4oeTNdXsjDxEA 6/BD/Zu8JICuxGVVRrVXWD76vK2i5YQUREo0p7/C0w== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvkedrvddttddgtddvucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucgfrhhlucfvnfffucdlvdefmdenucfjughrpefhvf evufffkffoggfgsedtkeertdertddtnecuhfhrohhmpeffrghnihgvlhcuighuuceougig uhesugiguhhuuhdrgiihiieqnecuggftrfgrthhtvghrnhepieekhedugeetvedutdfhie elhfejgfeuueeuffevveehgefgueefjeefuedukeefnecuffhomhgrihhnpehivghtfhdr ohhrghdpghhithhhuhgsrdgtohhmnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrg hmpehmrghilhhfrhhomhepugiguhesugiguhhuuhdrgiihii X-ME-Proxy: Feedback-ID: i6a694271:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Thu, 14 Dec 2023 17:49:15 -0500 (EST) From: Daniel Xu To: netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, 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 v6 0/5] Add bpf_xdp_get_xfrm_state() kfunc Date: Thu, 14 Dec 2023 15:49:01 -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 v5: * Improve kfunc doc comments * Remove extraneous replay-window setting on selftest reverse path * Squash two kfunc commits into one * Rebase to bpf-next to pick up bitfield write patches * Remove testing of opts.error in selftest prog 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 (5): bpf: xfrm: Add bpf_xdp_get_xfrm_state() kfunc 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 | 134 +++++++++++++++ .../selftests/bpf/prog_tests/test_tunnel.c | 162 +++++++++++++++++- .../selftests/bpf/progs/bpf_tracing_net.h | 1 + .../selftests/bpf/progs/test_tunnel_kern.c | 138 ++++++++------- tools/testing/selftests/bpf/test_tunnel.sh | 92 ---------- 8 files changed, 384 insertions(+), 155 deletions(-) create mode 100644 net/xfrm/xfrm_state_bpf.c