From patchwork Mon May 16 17:35:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_M=C3=BCller?= X-Patchwork-Id: 12851283 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A03E9C4332F for ; Mon, 16 May 2022 17:35:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235523AbiEPRfx (ORCPT ); Mon, 16 May 2022 13:35:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37562 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344322AbiEPRfu (ORCPT ); Mon, 16 May 2022 13:35:50 -0400 Received: from mout01.posteo.de (mout01.posteo.de [185.67.36.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3E20B36E3E for ; Mon, 16 May 2022 10:35:49 -0700 (PDT) Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id CC067240029 for ; Mon, 16 May 2022 19:35:47 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1652722547; bh=JKxU953oDp162p6Ydm5IYnqz22nVkzABsQ7Fc6fwFrM=; h=From:To:Subject:Date:From; b=JAPEyCDSk0u8LdLsy1sMD3T/2KRjQsvIJ0K42sjD7P+UWWu1ZpPeDFwsLRx0xIXwW PPNwS2gDJL6DIE/cuLhsoO1vSVlJFpjMJW7nOu+qGWgGieilPB13kXNnrXghb8f2rl Rhj9zxkTs8vrxW8gn41Lnp8SucgncklXKy67ssmhEn5DdpJ33tbJRDMCD7htWYP+P+ xqxOPbsZqlO6s77d2YYE0rm/Z2PDcZ6HH8cSxXTUZcuBclzHC6xnZDB67tWPK1UHKf 3lv5nVeC88E8O7nU+bgFgRy5R50YHQmXLGSMeJuakez/Ygm2rNyj6fgcuzT7HXXeWE MEQ8h2pmMak9g== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4L25xt6R51z9rxB; Mon, 16 May 2022 19:35:46 +0200 (CEST) From: =?utf-8?q?Daniel_M=C3=BCller?= To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kernel-team@fb.com, quentin@isovalent.com Subject: [PATCH bpf-next 02/12] selftests/bpf: Add test for libbpf_bpf_prog_type_str Date: Mon, 16 May 2022 17:35:30 +0000 Message-Id: <20220516173540.3520665-3-deso@posteo.net> In-Reply-To: <20220516173540.3520665-1-deso@posteo.net> References: <20220516173540.3520665-1-deso@posteo.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This change adds a test for libbpf_bpf_prog_type_str. The test retrieves all variants of the bpf_prog_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller --- .../selftests/bpf/prog_tests/libbpf_str.c | 57 +++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/libbpf_str.c diff --git a/tools/testing/selftests/bpf/prog_tests/libbpf_str.c b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c new file mode 100644 index 0000000..3e7a14 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */ + +#include +#include +#include + +/** + * Utility function uppercasing an entire string. + */ +static void uppercase(char *s) +{ + for (; *s != '\0'; s++) + *s = toupper(*s); +} + +/** + * Test case to check that all bpf_prog_type variants are covered by + * libbpf_bpf_prog_type_str. + */ +void test_libbpf_bpf_prog_type_str(void) +{ + struct btf *btf; + const struct btf_type *t; + const struct btf_enum *e; + int i, n, id; + + btf = btf__parse("/sys/kernel/btf/vmlinux", NULL); + if (!ASSERT_OK_PTR(btf, "btf_parse")) + return; + + /* find enum bpf_prog_type and enumerate each value */ + id = btf__find_by_name_kind(btf, "bpf_prog_type", BTF_KIND_ENUM); + if (!ASSERT_GT(id, 0, "bpf_prog_type_id")) + goto cleanup; + t = btf__type_by_id(btf, id); + e = btf_enum(t); + n = btf_vlen(t); + for (i = 0; i < n; e++, i++) { + enum bpf_prog_type prog_type = (enum bpf_prog_type)e->val; + const char *prog_type_name; + const char *prog_type_str; + char buf[256]; + + prog_type_name = btf__str_by_offset(btf, e->name_off); + prog_type_str = libbpf_bpf_prog_type_str(prog_type); + ASSERT_OK_PTR(prog_type_str, prog_type_name); + + snprintf(buf, sizeof(buf), "BPF_PROG_TYPE_%s", prog_type_str); + uppercase(buf); + + ASSERT_STREQ(buf, prog_type_name, "exp_str_value"); + } + +cleanup: + btf__free(btf); +}