From patchwork Mon May 23 23:04:27 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: 12859554 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 2CBB8C433F5 for ; Mon, 23 May 2022 23:05:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231288AbiEWXE6 (ORCPT ); Mon, 23 May 2022 19:04:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231437AbiEWXE5 (ORCPT ); Mon, 23 May 2022 19:04:57 -0400 Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CF0AFAF1E7 for ; Mon, 23 May 2022 16:04:56 -0700 (PDT) Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id 812DE240107 for ; Tue, 24 May 2022 01:04:55 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1653347095; bh=JC9GdLQk7vQr50oSUZjyG9qAlOkMnJHQCE8OaLOiKhA=; h=From:To:Cc:Subject:Date:From; b=HpJrKrQIsHZQyIVGOsg7VghQpKdVU5QZyBIl6t23W9ENH0Tgt+8qynltGbAfDdEUy 7augGgCYcQFVtxHGBMddJ/u7WeVgrP9V29ORVnrTU7C6a975s2eCN6UC6emvx9bfdu UIHp63nMgfXWD1RqwNq0Rs9itT9Gii1T2t2qhFBbkj44odEBbbMQehnjt1YYir3ry/ ggIZ80j8p9/dtZ6q+RQrEVqTbgcaT2mA/vd+SuloEzxAxMS9dI/wzYBJgfvoOJwA7F DpRr/DgQTWO048TrkG68Hv7p8iKIjJLYUqRhchUUQyjDvXMy0wo6ErhpgAimkDNhqG mmxwKaGYINlbQ== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4L6XwQ5ghfz6tmG; Tue, 24 May 2022 01:04:54 +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 Cc: yhs@fb.com, quentin@isovalent.com Subject: [PATCH bpf-next v4 11/12] selftests/bpf: Add test for libbpf_bpf_link_type_str Date: Mon, 23 May 2022 23:04:27 +0000 Message-Id: <20220523230428.3077108-12-deso@posteo.net> In-Reply-To: <20220523230428.3077108-1-deso@posteo.net> References: <20220523230428.3077108-1-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_link_type_str. The test retrieves all variants of the bpf_link_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller Acked-by: Quentin Monnet Acked-by: Yonghong Song --- .../selftests/bpf/prog_tests/libbpf_str.c | 48 +++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/libbpf_str.c b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c index c88df9..93e9cdd 100644 --- a/tools/testing/selftests/bpf/prog_tests/libbpf_str.c +++ b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c @@ -59,6 +59,51 @@ static void test_libbpf_bpf_attach_type_str(void) btf__free(btf); } +/* + * Test case to check that all bpf_link_type variants are covered by + * libbpf_bpf_link_type_str. + */ +static void test_libbpf_bpf_link_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_link_type and enumerate each value */ + id = btf__find_by_name_kind(btf, "bpf_link_type", BTF_KIND_ENUM); + if (!ASSERT_GT(id, 0, "bpf_link_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_link_type link_type = (enum bpf_link_type)e->val; + const char *link_type_name; + const char *link_type_str; + char buf[256]; + + if (link_type == MAX_BPF_LINK_TYPE) + continue; + + link_type_name = btf__str_by_offset(btf, e->name_off); + link_type_str = libbpf_bpf_link_type_str(link_type); + ASSERT_OK_PTR(link_type_str, link_type_name); + + snprintf(buf, sizeof(buf), "BPF_LINK_TYPE_%s", link_type_str); + uppercase(buf); + + ASSERT_STREQ(buf, link_type_name, "exp_str_value"); + } + +cleanup: + btf__free(btf); +} + /* * Test case to check that all bpf_map_type variants are covered by * libbpf_bpf_map_type_str. @@ -151,6 +196,9 @@ void test_libbpf_str(void) if (test__start_subtest("bpf_attach_type_str")) test_libbpf_bpf_attach_type_str(); + if (test__start_subtest("bpf_link_type_str")) + test_libbpf_bpf_link_type_str(); + if (test__start_subtest("bpf_map_type_str")) test_libbpf_bpf_map_type_str();