From patchwork Wed Dec 2 20:55:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florent Revest X-Patchwork-Id: 11947159 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 X-Spam-Level: X-Spam-Status: No, score=-20.2 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, URIBL_BLOCKED,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 6425CC64E7B for ; Wed, 2 Dec 2020 20:57:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1C3F32222E for ; Wed, 2 Dec 2020 20:57:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730852AbgLBU5S (ORCPT ); Wed, 2 Dec 2020 15:57:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46680 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727381AbgLBU5S (ORCPT ); Wed, 2 Dec 2020 15:57:18 -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 A9ACFC061A4E for ; Wed, 2 Dec 2020 12:55:54 -0800 (PST) Received: by mail-wr1-x444.google.com with SMTP id z7so5567322wrn.3 for ; Wed, 02 Dec 2020 12:55:54 -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=K/M4gu8JZX1RUvKKxbWMwd6sKzErX4ydvwnU8nMRHQ4=; b=D6faCZKaZz2JIRalfxmQNWlgs9BZVcVUzjLDZMWz8b+ljkUBScyhx1k/DaBTGAkDzM ifgZo1OQOhGfDRmmZW+jZbx/WI74J37e99r3U6h+FsSE2dzF3OZR8yILdeF9PMFPY0ey f6SN5/dbQR4iNJ1QMLg3cz0QAnwiOD6II2qo0= 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=K/M4gu8JZX1RUvKKxbWMwd6sKzErX4ydvwnU8nMRHQ4=; b=GQpG2hV3Qfdm+YgF57+11gD6dFZBE+5eK5M+6ZoY/mXJSDl1v8+iT4NXfx9LUKSr93 TWdSMIX1VQDSTlsVkFYu3aQS6kg5U0prbprxCKLKK28qzgr2csi3G+/is7HkczYapCk+ PZAHvihAr5OCEHmUaQTMIJmomBQsxVWew/iG5q5e66QdvtRejVRIsEeKtaU53I9BPKij t8O+6e+TApdbc9v9Pwy76DiBT/2GT0YjdqvkbBzyqFtjOfxvXyoeYs7bcdf0xVN0dpoE PVhWomEd57HbmG7RhTB3UAYhdg5s/oOCRS3wTKb+usD+Wj7hh08ER74dVOsgu3NtmCgR gARA== X-Gm-Message-State: AOAM53273oWdAz6slP1OXamKukYTnT8BOdr+8jD6TviumRNA709i0iv7 prVpwrjtwYEfa9Qnm2utnQnLM0Z9mzrlyA== X-Google-Smtp-Source: ABdhPJzDW4KvZQDtKBx2AAD1dvrgz0s0/U1bpc8MB3nSpS75fvQe+AX+zq9feZKzJNeYBsUnpHuYJg== X-Received: by 2002:adf:e44d:: with SMTP id t13mr5723226wrm.144.1606942552995; Wed, 02 Dec 2020 12:55:52 -0800 (PST) Received: from revest.zrh.corp.google.com ([2a00:79e0:42:204:f693:9fff:fef4:a569]) by smtp.gmail.com with ESMTPSA id d2sm3438486wrn.43.2020.12.02.12.55.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Dec 2020 12:55:52 -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 v4 4/6] bpf: Add an iterator selftest for bpf_sk_storage_delete Date: Wed, 2 Dec 2020 21:55:25 +0100 Message-Id: <20201202205527.984965-4-revest@google.com> X-Mailer: git-send-email 2.29.2.454.gaff20da3a2-goog In-Reply-To: <20201202205527.984965-1-revest@google.com> References: <20201202205527.984965-1-revest@google.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net The eBPF program iterates over all entries (well, only one) of a socket local storage map and deletes them all. The test makes sure that the entry is indeed deleted. Signed-off-by: Florent Revest Acked-by: Martin KaFai Lau --- .../selftests/bpf/prog_tests/bpf_iter.c | 64 +++++++++++++++++++ .../progs/bpf_iter_bpf_sk_storage_helpers.c | 23 +++++++ 2 files changed, 87 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c index 448885b95eed..bb4a638f2e6f 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c @@ -20,6 +20,7 @@ #include "bpf_iter_bpf_percpu_hash_map.skel.h" #include "bpf_iter_bpf_array_map.skel.h" #include "bpf_iter_bpf_percpu_array_map.skel.h" +#include "bpf_iter_bpf_sk_storage_helpers.skel.h" #include "bpf_iter_bpf_sk_storage_map.skel.h" #include "bpf_iter_test_kern5.skel.h" #include "bpf_iter_test_kern6.skel.h" @@ -913,6 +914,67 @@ static void test_bpf_percpu_array_map(void) bpf_iter_bpf_percpu_array_map__destroy(skel); } +/* An iterator program deletes all local storage in a map. */ +static void test_bpf_sk_storage_delete(void) +{ + DECLARE_LIBBPF_OPTS(bpf_iter_attach_opts, opts); + struct bpf_iter_bpf_sk_storage_helpers *skel; + union bpf_iter_link_info linfo; + int err, len, map_fd, iter_fd; + struct bpf_link *link; + int sock_fd = -1; + __u32 val = 42; + char buf[64]; + + skel = bpf_iter_bpf_sk_storage_helpers__open_and_load(); + if (CHECK(!skel, "bpf_iter_bpf_sk_storage_helpers__open_and_load", + "skeleton open_and_load failed\n")) + return; + + map_fd = bpf_map__fd(skel->maps.sk_stg_map); + + sock_fd = socket(AF_INET6, SOCK_STREAM, 0); + if (CHECK(sock_fd < 0, "socket", "errno: %d\n", errno)) + goto out; + err = bpf_map_update_elem(map_fd, &sock_fd, &val, BPF_NOEXIST); + if (CHECK(err, "map_update", "map_update failed\n")) + goto out; + + memset(&linfo, 0, sizeof(linfo)); + linfo.map.map_fd = map_fd; + opts.link_info = &linfo; + opts.link_info_len = sizeof(linfo); + link = bpf_program__attach_iter(skel->progs.delete_bpf_sk_storage_map, + &opts); + if (CHECK(IS_ERR(link), "attach_iter", "attach_iter failed\n")) + goto out; + + iter_fd = bpf_iter_create(bpf_link__fd(link)); + if (CHECK(iter_fd < 0, "create_iter", "create_iter failed\n")) + goto free_link; + + /* do some tests */ + while ((len = read(iter_fd, buf, sizeof(buf))) > 0) + ; + if (CHECK(len < 0, "read", "read failed: %s\n", strerror(errno))) + goto close_iter; + + /* test results */ + err = bpf_map_lookup_elem(map_fd, &sock_fd, &val); + if (CHECK(!err || errno != ENOENT, "bpf_map_lookup_elem", + "map value wasn't deleted (err=%d, errno=%d)\n", err, errno)) + goto close_iter; + +close_iter: + close(iter_fd); +free_link: + bpf_link__destroy(link); +out: + if (sock_fd >= 0) + close(sock_fd); + bpf_iter_bpf_sk_storage_helpers__destroy(skel); +} + static void test_bpf_sk_storage_map(void) { DECLARE_LIBBPF_OPTS(bpf_iter_attach_opts, opts); @@ -1067,6 +1129,8 @@ void test_bpf_iter(void) test_bpf_percpu_array_map(); if (test__start_subtest("bpf_sk_storage_map")) test_bpf_sk_storage_map(); + if (test__start_subtest("bpf_sk_storage_delete")) + test_bpf_sk_storage_delete(); if (test__start_subtest("rdonly-buf-out-of-bound")) test_rdonly_buf_out_of_bound(); if (test__start_subtest("buf-neg-offset")) 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 new file mode 100644 index 000000000000..01ff3235e413 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2020 Google LLC. */ +#include "bpf_iter.h" +#include +#include + +char _license[] SEC("license") = "GPL"; + +struct { + __uint(type, BPF_MAP_TYPE_SK_STORAGE); + __uint(map_flags, BPF_F_NO_PREALLOC); + __type(key, int); + __type(value, int); +} sk_stg_map SEC(".maps"); + +SEC("iter/bpf_sk_storage_map") +int delete_bpf_sk_storage_map(struct bpf_iter__bpf_sk_storage_map *ctx) +{ + if (ctx->sk) + bpf_sk_storage_delete(&sk_stg_map, ctx->sk); + + return 0; +}