From patchwork Thu Nov 26 16:44:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florent Revest X-Patchwork-Id: 334084 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 44F36C64E7B for ; Thu, 26 Nov 2020 16:45:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E822E221F7 for ; Thu, 26 Nov 2020 16:45:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="dfG6QgYG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403954AbgKZQps (ORCPT ); Thu, 26 Nov 2020 11:45:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59088 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403947AbgKZQpr (ORCPT ); Thu, 26 Nov 2020 11:45:47 -0500 Received: from mail-wr1-x444.google.com (mail-wr1-x444.google.com [IPv6:2a00:1450:4864:20::444]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7F3CCC061A48 for ; Thu, 26 Nov 2020 08:45:45 -0800 (PST) Received: by mail-wr1-x444.google.com with SMTP id t4so2783638wrr.12 for ; Thu, 26 Nov 2020 08:45:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=R8OIjsoCGUrG5WzInzx7EjrjpLAoCJHAB1p5aT6+rCM=; b=dfG6QgYG3wMRF+1qrcQJ+2Msv84PvbSL3jc039gEML/SehncbRgKiAD/bpJSolPlDj EUxqAunSuZOxiDOtzmUVHLn9dtIljEgKQIbc3HLznqCnP4h+38i+5ksLWz2ffeLaCxdC Y9ifZ94RpLOLRqR4Dywo9EY8vXYTQYzsRuEjs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=R8OIjsoCGUrG5WzInzx7EjrjpLAoCJHAB1p5aT6+rCM=; b=lX0DJkyMR50aTBFSOUZsbI3bCRKb7bqOfWv4CWwrvWshfaW6tUq1K9ySssQTh++28d OSepNDuyt8NlJ0BMPy9scxLG9/vN1pGnmJ44uNHEvNdKYd2/UtTnXHPTFK/OJpUeHChs 5DdFQ5HP2qVtzQmichkdF4f3YfLsL0m3t6VoTM4+5telRCZxxORkpe+dF4j5OPY4a6y6 Vxe5ATUaV5ayAqRxevj8M8JLQ47cxejAD4PC/HzBg88sggA33u1liXKB15t82kj9ySXJ DURgg6bmZ7lnJnWrvGIeD77He1Z9QFKHny8+pF5aXReqXZ9lAfTKcJ42HRHQ+jLVPjXY w4qQ== X-Gm-Message-State: AOAM531WaMZuP66wOHKE7ay60jB8+qDO9qH5Oosctmk8hgif7efrenth ZihNMC5svQKANkI9SrrEqkYovQ== X-Google-Smtp-Source: ABdhPJzSNy5KWDcCBURNPLt/CBHQyRh/dh9G9EIGL7pKRAi9DE7KKXVSit7SVTmAprKpY/ovGLEU5A== X-Received: by 2002:adf:ed46:: with SMTP id u6mr4833460wro.287.1606409144239; Thu, 26 Nov 2020 08:45:44 -0800 (PST) Received: from revest.zrh.corp.google.com ([2a00:79e0:42:204:f693:9fff:fef4:a569]) by smtp.gmail.com with ESMTPSA id f17sm8805824wmh.10.2020.11.26.08.45.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Nov 2020 08:45:43 -0800 (PST) From: Florent Revest X-Google-Original-From: Florent Revest To: bpf@vger.kernel.org Cc: viro@zeniv.linux.org.uk, davem@davemloft.net, kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net, kafai@fb.com, yhs@fb.com, andrii@kernel.org, kpsingh@chromium.org, revest@google.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH bpf-next v3 6/6] bpf: Test bpf_sk_storage_get in tcp iterators Date: Thu, 26 Nov 2020 17:44:49 +0100 Message-Id: <20201126164449.1745292-6-revest@google.com> X-Mailer: git-send-email 2.29.2.454.gaff20da3a2-goog In-Reply-To: <20201126164449.1745292-1-revest@google.com> References: <20201126164449.1745292-1-revest@google.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This extends the existing bpf_sk_storage_get test where a socket is created and tagged with its creator's pid by a task_file iterator. A TCP iterator is now also used at the end of the test to negate the values already stored in the local storage. The test therefore expects -getpid() to be stored in the local storage. Signed-off-by: Florent Revest --- .../selftests/bpf/prog_tests/bpf_iter.c | 13 +++++++++++++ .../progs/bpf_iter_bpf_sk_storage_helpers.c | 18 ++++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c index 9336d0f18331..b8362147c9e3 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c @@ -978,6 +978,8 @@ static void test_bpf_sk_storage_delete(void) /* This creates a socket and its local storage. It then runs a task_iter BPF * program that replaces the existing socket local storage with the tgid of the * only task owning a file descriptor to this socket, this process, prog_tests. + * It then runs a tcp socket iterator that negates the value in the existing + * socket local storage, the test verifies that the resulting value is -pid. */ static void test_bpf_sk_storage_get(void) { @@ -994,6 +996,10 @@ static void test_bpf_sk_storage_get(void) if (CHECK(sock_fd < 0, "socket", "errno: %d\n", errno)) goto out; + err = listen(sock_fd, 1); + if (CHECK(err != 0, "listen", "errno: %d\n", errno)) + goto out; + map_fd = bpf_map__fd(skel->maps.sk_stg_map); err = bpf_map_update_elem(map_fd, &sock_fd, &val, BPF_NOEXIST); @@ -1007,6 +1013,13 @@ static void test_bpf_sk_storage_get(void) "map value wasn't set correctly (expected %d, got %d, err=%d)\n", getpid(), val, err); + do_dummy_read(skel->progs.negate_socket_local_storage); + + err = bpf_map_lookup_elem(map_fd, &sock_fd, &val); + CHECK(err || val != -getpid(), "bpf_map_lookup_elem", + "map value wasn't set correctly (expected %d, got %d, err=%d)\n", + -getpid(), val, err); + close_socket: close(sock_fd); out: diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c index d7a7a802d172..b3f0cb139c55 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c @@ -46,3 +46,21 @@ int fill_socket_owner(struct bpf_iter__task_file *ctx) return 0; } +SEC("iter/tcp") +int negate_socket_local_storage(struct bpf_iter__tcp *ctx) +{ + struct sock_common *sk_common = ctx->sk_common; + int *sock_tgid; + + if (!sk_common) + return 0; + + sock_tgid = bpf_sk_storage_get(&sk_stg_map, sk_common, 0, 0); + if (!sock_tgid) + return 0; + + *sock_tgid = -*sock_tgid; + + return 0; +} +