From patchwork Thu Oct 7 14:13:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hengqi Chen X-Patchwork-Id: 12542009 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 935DCC433F5 for ; Thu, 7 Oct 2021 14:14:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7CCFC610C7 for ; Thu, 7 Oct 2021 14:14:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241969AbhJGOQG (ORCPT ); Thu, 7 Oct 2021 10:16:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52448 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241679AbhJGOQG (ORCPT ); Thu, 7 Oct 2021 10:16:06 -0400 Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 74867C061570 for ; Thu, 7 Oct 2021 07:14:12 -0700 (PDT) Received: by mail-pj1-x102e.google.com with SMTP id ls18-20020a17090b351200b001a00250584aso6533165pjb.4 for ; Thu, 07 Oct 2021 07:14:12 -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=ZWb2fYim43OGSg+xARj8L/LhBJo5rAUAhxuWF5T+im4=; b=MgSXzIOurIieQL6ahs4dDQza5zNQN4wSEOQQ3r263ocILyjoGdVcPS3qAvFHIn5Vx6 Nw+yYjBio4uBGZWpkZil7EVdEyWrntgcT25sKta0J20jTGcgP8xaYFBrRvg9UMTwUSyB gm7QuPJIsmTaPtPBT1noUSqtpUg0OPiHNCZoH1SK7I6S0B7kallwpAMmWcG72sAddEIy dsy9mPVjc+1Ur5giyCOOr7sk3Kchk3cy6yexm+WSxTY/6sH9xun0b6zysKWyQithJlal Wik1Ukv8CoBoaLSK5BDMzcmlHvJ5gijfbQr5OARO2kWKFinHXQRBfuUHjAXVowCXsgiB 9LBA== 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=ZWb2fYim43OGSg+xARj8L/LhBJo5rAUAhxuWF5T+im4=; b=zKyWRawSfKHXnFFFAz/AfkF0gP+8BqkgHvAKnVGNlWdO6fKAS9f0FMrQSS5aofKiDg qTAsYHGx2D1XZFpawWeWc63Q0hDWvWdlLvkd+eUkzx8QsdtT7OrnwjX43dCQHN3tZEc6 +ZW7TcznFhlB8Y+/r9BxLz2btc/u5+BXIHuXtW+YHkB6sTBb4kMX/DQ4O56RBY4PF+t/ 3ZcisZUmtlTeCUfCU5nQj3UmdDeEykb+ezjtdaREGYndA7u4TheYYc0NLbhYzxan+7oV pGpf20YXE3vf/TYdnaV+p5cIhvNLd8xnLRdeS/SkDKUMk8zd0HANjeGjRP5wVjd0gVvH xPOg== X-Gm-Message-State: AOAM530jqmte42BSFufyGIJr+dsLGIAEFcYdOMFa4MFf+LhsB7xLg43v 58Vkm+pdGBbXHQGZNPKSgxMTUmvbIic56Q== X-Google-Smtp-Source: ABdhPJwG59YfU07WIFgANBWGPX5UKgPXVMkS1Fszf/5EncCMDI8HRwnTYZl/iBs8kKNSY4rEX+swRw== X-Received: by 2002:a17:90a:718b:: with SMTP id i11mr2108632pjk.22.1633616051857; Thu, 07 Oct 2021 07:14:11 -0700 (PDT) Received: from localhost.localdomain ([119.28.83.143]) by smtp.gmail.com with ESMTPSA id rm6sm3102699pjb.18.2021.10.07.07.14.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Oct 2021 07:14:11 -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 v2] selftests/bpf: Test bpf_skc_to_unix_sock() helper Date: Thu, 7 Oct 2021 22:13:31 +0800 Message-Id: <20211007141331.723149-3-hengqi.chen@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211007141331.723149-1-hengqi.chen@gmail.com> References: <20211007141331.723149-1-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 | 29 ++++++++++ 2 files changed, 83 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..971ef5b948bd --- /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_EQ(strcmp(skel->bss->path, sock_path), 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..098c49c2edce --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_skc_to_unix_sock.c @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2021 Hengqi Chen */ + +#include "vmlinux.h" +#include +#include +#include + +const volatile pid_t my_pid = 0; +char path[256] = {}; + +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; + + bpf_core_read_str(path, sizeof(path), &unix_sk->addr->name->sun_path); + return 0; +} + +char _license[] SEC("license") = "GPL";