From patchwork Wed Oct 6 04:06:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hengqi Chen X-Patchwork-Id: 12538599 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D88B6C433EF for ; Wed, 6 Oct 2021 04:07:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BB3916120F for ; Wed, 6 Oct 2021 04:07:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229793AbhJFEJI (ORCPT ); Wed, 6 Oct 2021 00:09:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35860 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229715AbhJFEJH (ORCPT ); Wed, 6 Oct 2021 00:09:07 -0400 Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2971AC061749 for ; Tue, 5 Oct 2021 21:07:16 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id m26so1242283pff.3 for ; Tue, 05 Oct 2021 21:07:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=UV95gCH/A0zUMd47XZZwVHKwhU4S7wZsOsteWRQmQPg=; b=CKHFCqPslVPCCqSYLD+PeB8jqWFCmffJc6Ona3pdlFi0d+p5n9/xT5SyzCSgAXHMnH xf9ou77grWJp8+i3rc7VOHiBBO7gteQiUhzd1EuXNpbqO7m/Z2xXx3PaVfvVsAVid4TF W2AVHmc2nfO4QlcuvZIMHm1JMag9emWu3nwWpQw98U/aEJaJJC0/lm6fJJTtAcNQGb3P APNSmaKk7sBC1DIruanzcIMrVauZAG/493582Gv41SNLCJoL5oXDSNXZbPvSY4tPhrTU donzDvRH8HqcVGorplgO7mz+aOdOe9Xce4r7Tl1lFTsxHMiuMEAxa2w4iVN1cEkufTpS nuAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=UV95gCH/A0zUMd47XZZwVHKwhU4S7wZsOsteWRQmQPg=; b=YZ0uDwhqWrlTqPv1ViE7I90F1Y4w22VjI/8imqRvgFldLh4TUAmcjvhE1T15bGpyzY 0MCH88vhMnhORTL+vV8yYFA+MgcYkdN0V4ltIh6gMDfSwXRNrgDFuN9haTICiT26NqX7 Q8friq4LbBwqCPz21MAnVInaBYFWURxYNt7lCaMkFaK8ehqXTzxXpSsb1AtJ34ckZG6B YmfI4jDC7CjTtXBO3gEpc3fGmvUy8j3b1SmzAiUupAynsERanGA3ZJefN/5jD4Bg/Lp7 Ps+4C6BAHBP5fY0adWhykWsebFCzVOkgkJUUo1q12+Hzqjnnurd5R+efa9xwSg92hE9M cbEQ== X-Gm-Message-State: AOAM533n+7t5ZWt5sWh8sxPm4YhNee4pxHEKZRB8hW3ihGyEQmRFj+IQ 0kquvysebn2SNbB1/MVOL7xdHIt+D2SZ7g== X-Google-Smtp-Source: ABdhPJwD39R/Mg0OOK7R2AW3xSbskTSL2oqAOz0EuCL2SVTiSw2nLxJQJ/IFLoLBEA/ZpSYILSPSEA== X-Received: by 2002:a63:2cce:: with SMTP id s197mr17954994pgs.45.1633493235582; Tue, 05 Oct 2021 21:07:15 -0700 (PDT) Received: from localhost.localdomain ([119.28.83.143]) by smtp.gmail.com with ESMTPSA id b21sm20846965pfv.96.2021.10.05.21.07.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Oct 2021 21:07:15 -0700 (PDT) From: Hengqi Chen To: bpf@vger.kernel.org Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, yhs@fb.com, john.fastabend@gmail.com, kafai@fb.com, songliubraving@fb.com, hengqi.chen@gmail.com Subject: [PATCH bpf-next 2/2] selftests/bpf: Test bpf_skc_to_unix_sock() Date: Wed, 6 Oct 2021 12:06:23 +0800 Message-Id: <20211006040623.401527-3-hengqi.chen@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211006040623.401527-1-hengqi.chen@gmail.com> References: <20211006040623.401527-1-hengqi.chen@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Add a new test which triggers unix_listen kernel function to test bpf_skc_to_unix_sock helper. Signed-off-by: Hengqi Chen --- .../bpf/prog_tests/skc_to_unix_sock.c | 54 +++++++++++++++++++ .../bpf/progs/test_skc_to_unix_sock.c | 28 ++++++++++ 2 files changed, 82 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/skc_to_unix_sock.c create mode 100644 tools/testing/selftests/bpf/progs/test_skc_to_unix_sock.c -- 2.25.1 diff --git a/tools/testing/selftests/bpf/prog_tests/skc_to_unix_sock.c b/tools/testing/selftests/bpf/prog_tests/skc_to_unix_sock.c new file mode 100644 index 000000000000..5d8ed76a71dc --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/skc_to_unix_sock.c @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2021 Hengqi Chen */ + +#include +#include +#include "test_skc_to_unix_sock.skel.h" + +static const char *sock_path = "/tmp/test.sock"; + +void test_skc_to_unix_sock(void) +{ + struct test_skc_to_unix_sock *skel; + struct sockaddr_un sockaddr; + int err, len, sockfd = 0; + + skel = test_skc_to_unix_sock__open(); + if (!ASSERT_OK_PTR(skel, "could not open BPF object")) + return; + + skel->rodata->my_pid = getpid(); + + err = test_skc_to_unix_sock__load(skel); + if (!ASSERT_OK(err, "could not load BPF object")) + goto cleanup; + + err = test_skc_to_unix_sock__attach(skel); + if (!ASSERT_OK(err, "could not attach BPF object")) + goto cleanup; + + // trigger unix_listen + sockfd = socket(AF_UNIX, SOCK_STREAM, 0); + if (!ASSERT_GT(sockfd, 0, "socket failed")) + goto cleanup; + + sockaddr.sun_family = AF_UNIX; + strcpy(sockaddr.sun_path, sock_path); + len = sizeof(sockaddr); + unlink(sock_path); + + err = bind(sockfd, (struct sockaddr *)&sockaddr, len); + if (!ASSERT_OK(err, "bind failed")) + goto cleanup; + + err = listen(sockfd, 1); + if (!ASSERT_OK(err, "listen failed")) + goto cleanup; + + ASSERT_GT(skel->bss->ret, 0, "bpf_skc_to_unix_sock failed"); + +cleanup: + if (sockfd) + close(sockfd); + test_skc_to_unix_sock__destroy(skel); +} diff --git a/tools/testing/selftests/bpf/progs/test_skc_to_unix_sock.c b/tools/testing/selftests/bpf/progs/test_skc_to_unix_sock.c new file mode 100644 index 000000000000..544d2ed56d7e --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_skc_to_unix_sock.c @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2021 Hengqi Chen */ + +#include "vmlinux.h" +#include +#include + +const volatile pid_t my_pid = 0; +__u64 ret = 0; + +SEC("fentry/unix_listen") +int BPF_PROG(unix_listen, struct socket *sock, int backlog) +{ + pid_t pid = bpf_get_current_pid_tgid() >> 32; + struct unix_sock *unix_sk; + + if (pid != my_pid) + return 0; + + unix_sk = (struct unix_sock *)bpf_skc_to_unix_sock(sock->sk); + if (!unix_sk) + return 0; + + ret = (__u64)unix_sk; + return 0; +} + +char _license[] SEC("license") = "GPL";