From patchwork Thu Dec 14 22:49:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Xu X-Patchwork-Id: 13493778 Received: from wnew1-smtp.messagingengine.com (wnew1-smtp.messagingengine.com [64.147.123.26]) (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 42E0C6F614; Thu, 14 Dec 2023 22:49:43 +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="qJcqpxiN"; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="lLtW2KZJ" Received: from compute2.internal (compute2.nyi.internal [10.202.2.46]) by mailnew.west.internal (Postfix) with ESMTP id 2E4A02B007A7; Thu, 14 Dec 2023 17:49:40 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute2.internal (MEProxy); Thu, 14 Dec 2023 17:49:42 -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:in-reply-to:message-id:mime-version:references :reply-to:subject:subject:to:to; s=fm3; t=1702594179; x= 1702601379; bh=Qq1ouEN+3ihu7U9MznAZUpbzC1IONhC/7bAWyzeIku8=; b=q JcqpxiNiyYr34sDS9EKQhYc9wxX9mzCZAiw2nNy8MGVlU9u/UrVfYDlxO7xCo/M/ fcHAaBB8226PPFcKcqpzqC8kd+coRqvhwk1qR7Vb863V/h5cpm+8NkrKouhFCJhA LbMv5F3gwDhl47+nELFf+9Yl8W6fubXsAHcg9uXMwOdOg73aTvaaNxYpU+eEB1fk 8PsKwVEPLZFg4MbRHC1S0G+9KhJ3q/3WhP9Xpt6SSmX8vY23ZEZzAbgXxgDGU+2c Y0B5f++E6Tz8CwvPUp+Bp1ysOZl88rLwuajd0x/QFtExiRARlMj5dJSCQ0gPdEaV z05wGSFLHSYYRdzcBSelw== 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:in-reply-to:message-id:mime-version:references :reply-to:subject:subject:to:to:x-me-proxy:x-me-proxy :x-me-sender:x-me-sender:x-sasl-enc; s=fm1; t=1702594179; x= 1702601379; bh=Qq1ouEN+3ihu7U9MznAZUpbzC1IONhC/7bAWyzeIku8=; b=l LtW2KZJKAnxlWzW+V1TnKa5jsRIQbzY0dPE8TSPeJmqmXls62QxG2CKzTjrhCPfx vzngzOavGTmbcrUYSqLtji8wH7BE3UV8sbMEESH6r2OtPdiMZFTEwTI1a0JSJSRY BdR8YfE64HJyBhZUH+7HHXBDH2Cz6vJuXJeEu6/3hyqLYbtrNBgmXma7PHyTqpCx Y1EUXWHOQ/7TXiRXK78eB2j7VdPv8QXx1EQpFKZ1i0ChawyiTiaSlMLlIbTUNz5p ZnnS23EM/XrfryVXUNC8jDp26ai3Uzzjsrrz7augnUV9tf5xPH244F75uv2vYJln 46swzWSB55SfqQEXCVAEw== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvkedrvddttddgtddvucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucgfrhhlucfvnfffucdlfeehmdenucfjughrpefhvf evufffkffojghfggfgsedtkeertdertddtnecuhfhrohhmpeffrghnihgvlhcuighuuceo ugiguhesugiguhhuuhdrgiihiieqnecuggftrfgrthhtvghrnhepgfefgfegjefhudeike dvueetffelieefuedvhfehjeeljeejkefgffeghfdttdetnecuvehluhhsthgvrhfuihii vgeptdenucfrrghrrghmpehmrghilhhfrhhomhepugiguhesugiguhhuuhdrgiihii X-ME-Proxy: Feedback-ID: i6a694271:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Thu, 14 Dec 2023 17:49:37 -0500 (EST) From: Daniel Xu To: davem@davemloft.net, hawk@kernel.org, shuah@kernel.org, kuba@kernel.org, john.fastabend@gmail.com, daniel@iogearbox.net, andrii@kernel.org, ast@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: martin.lau@linux.dev, song@kernel.org, kpsingh@kernel.org, sdf@google.com, haoluo@google.com, jolsa@kernel.org, mykolal@fb.com, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, devel@linux-ipsec.org Subject: [PATCH bpf-next v6 5/5] bpf: xfrm: Add selftest for bpf_xdp_get_xfrm_state() Date: Thu, 14 Dec 2023 15:49:06 -0700 Message-ID: X-Mailer: git-send-email 2.42.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This commit extends test_tunnel selftest to test the new XDP xfrm state lookup kfunc. Co-developed-by: Antony Antony Signed-off-by: Antony Antony Signed-off-by: Daniel Xu --- .../selftests/bpf/prog_tests/test_tunnel.c | 16 +++++- .../selftests/bpf/progs/test_tunnel_kern.c | 51 +++++++++++++++++++ 2 files changed, 65 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/test_tunnel.c b/tools/testing/selftests/bpf/prog_tests/test_tunnel.c index 2d7f8fa82ebd..2b3c6dd66259 100644 --- a/tools/testing/selftests/bpf/prog_tests/test_tunnel.c +++ b/tools/testing/selftests/bpf/prog_tests/test_tunnel.c @@ -278,7 +278,7 @@ static int add_xfrm_tunnel(void) SYS(fail, "ip netns exec at_ns0 " "ip xfrm state add src %s dst %s proto esp " - "spi %d reqid 1 mode tunnel " + "spi %d reqid 1 mode tunnel replay-window 42 " "auth-trunc 'hmac(sha1)' %s 96 enc 'cbc(aes)' %s", IP4_ADDR_VETH0, IP4_ADDR1_VETH1, XFRM_SPI_IN_TO_OUT, XFRM_AUTH, XFRM_ENC); SYS(fail, @@ -313,7 +313,7 @@ static int add_xfrm_tunnel(void) */ SYS(fail, "ip xfrm state add src %s dst %s proto esp " - "spi %d reqid 1 mode tunnel " + "spi %d reqid 1 mode tunnel replay-window 42 " "auth-trunc 'hmac(sha1)' %s 96 enc 'cbc(aes)' %s", IP4_ADDR_VETH0, IP4_ADDR1_VETH1, XFRM_SPI_IN_TO_OUT, XFRM_AUTH, XFRM_ENC); SYS(fail, @@ -628,8 +628,10 @@ static void test_xfrm_tunnel(void) { DECLARE_LIBBPF_OPTS(bpf_tc_hook, tc_hook, .attach_point = BPF_TC_INGRESS); + LIBBPF_OPTS(bpf_xdp_attach_opts, opts); struct test_tunnel_kern *skel = NULL; struct nstoken *nstoken; + int xdp_prog_fd; int tc_prog_fd; int ifindex; int err; @@ -654,6 +656,14 @@ static void test_xfrm_tunnel(void) if (attach_tc_prog(&tc_hook, tc_prog_fd, -1)) goto done; + /* attach xdp prog to tunnel dev */ + xdp_prog_fd = bpf_program__fd(skel->progs.xfrm_get_state_xdp); + if (!ASSERT_GE(xdp_prog_fd, 0, "bpf_program__fd")) + goto done; + err = bpf_xdp_attach(ifindex, xdp_prog_fd, XDP_FLAGS_REPLACE, &opts); + if (!ASSERT_OK(err, "bpf_xdp_attach")) + goto done; + /* ping from at_ns0 namespace test */ nstoken = open_netns("at_ns0"); err = test_ping(AF_INET, IP4_ADDR_TUNL_DEV1); @@ -667,6 +677,8 @@ static void test_xfrm_tunnel(void) goto done; if (!ASSERT_EQ(skel->bss->xfrm_remote_ip, 0xac100164, "remote_ip")) goto done; + if (!ASSERT_EQ(skel->bss->xfrm_replay_window, 42, "replay_window")) + goto done; done: delete_xfrm_tunnel(); diff --git a/tools/testing/selftests/bpf/progs/test_tunnel_kern.c b/tools/testing/selftests/bpf/progs/test_tunnel_kern.c index 3a59eb9c34de..3e436e6f7312 100644 --- a/tools/testing/selftests/bpf/progs/test_tunnel_kern.c +++ b/tools/testing/selftests/bpf/progs/test_tunnel_kern.c @@ -30,6 +30,10 @@ int bpf_skb_set_fou_encap(struct __sk_buff *skb_ctx, struct bpf_fou_encap *encap, int type) __ksym; int bpf_skb_get_fou_encap(struct __sk_buff *skb_ctx, struct bpf_fou_encap *encap) __ksym; +struct xfrm_state * +bpf_xdp_get_xfrm_state(struct xdp_md *ctx, struct bpf_xfrm_state_opts *opts, + u32 opts__sz) __ksym; +void bpf_xdp_xfrm_state_release(struct xfrm_state *x) __ksym; struct { __uint(type, BPF_MAP_TYPE_ARRAY); @@ -950,4 +954,51 @@ int xfrm_get_state(struct __sk_buff *skb) return TC_ACT_OK; } +volatile int xfrm_replay_window = 0; + +SEC("xdp") +int xfrm_get_state_xdp(struct xdp_md *xdp) +{ + struct bpf_xfrm_state_opts opts = {}; + struct xfrm_state *x = NULL; + struct ip_esp_hdr *esph; + struct bpf_dynptr ptr; + u8 esph_buf[8] = {}; + u8 iph_buf[20] = {}; + struct iphdr *iph; + u32 off; + + if (bpf_dynptr_from_xdp(xdp, 0, &ptr)) + goto out; + + off = sizeof(struct ethhdr); + iph = bpf_dynptr_slice(&ptr, off, iph_buf, sizeof(iph_buf)); + if (!iph || iph->protocol != IPPROTO_ESP) + goto out; + + off += sizeof(struct iphdr); + esph = bpf_dynptr_slice(&ptr, off, esph_buf, sizeof(esph_buf)); + if (!esph) + goto out; + + opts.netns_id = BPF_F_CURRENT_NETNS; + opts.daddr.a4 = iph->daddr; + opts.spi = esph->spi; + opts.proto = IPPROTO_ESP; + opts.family = AF_INET; + + x = bpf_xdp_get_xfrm_state(xdp, &opts, sizeof(opts)); + if (!x) + goto out; + + if (!x->replay_esn) + goto out; + + xfrm_replay_window = x->replay_esn->replay_window; +out: + if (x) + bpf_xdp_xfrm_state_release(x); + return XDP_PASS; +} + char _license[] SEC("license") = "GPL";