From patchwork Fri Dec 4 18:18:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Lehner X-Patchwork-Id: 11952067 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=-16.8 required=3.0 tests=BAYES_00, 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 0570DC433FE for ; Fri, 4 Dec 2020 18:20:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BFD8E22CBB for ; Fri, 4 Dec 2020 18:20:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387419AbgLDSUI (ORCPT ); Fri, 4 Dec 2020 13:20:08 -0500 Received: from mx.der-flo.net ([193.160.39.236]:40128 "EHLO mx.der-flo.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726602AbgLDSUH (ORCPT ); Fri, 4 Dec 2020 13:20:07 -0500 Received: by mx.der-flo.net (Postfix, from userid 110) id C97BF4458E; Fri, 4 Dec 2020 19:19:25 +0100 (CET) Received: from localhost (unknown [IPv6:2a02:1205:34c2:d100:56f5:35da:21bf:c38d]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx.der-flo.net (Postfix) with ESMTPSA id C49F744581; Fri, 4 Dec 2020 19:19:21 +0100 (CET) From: Florian Lehner To: bpf@vger.kernel.org Cc: netdev@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, john.fastabend@gmail.com, Florian Lehner , Krzesimir Nowak Subject: [PATCH 2/2] selftests/bpf: Avoid errno clobbering Date: Fri, 4 Dec 2020 19:18:28 +0100 Message-Id: <20201204181828.11974-3-dev@der-flo.net> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201204181828.11974-1-dev@der-flo.net> References: <20201204181828.11974-1-dev@der-flo.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Print a message when the returned error is about a program type being not supported or because of permission problems. These messages are expected if the program to test was actually executed. Cc: Krzesimir Nowak Signed-off-by: Florian Lehner --- tools/testing/selftests/bpf/test_verifier.c | 27 +++++++++++++++++---- 1 file changed, 22 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c index ceea9409639e..777a81404fdb 100644 --- a/tools/testing/selftests/bpf/test_verifier.c +++ b/tools/testing/selftests/bpf/test_verifier.c @@ -875,19 +875,36 @@ static int do_prog_test_run(int fd_prog, bool unpriv, uint32_t expected_val, __u8 tmp[TEST_DATA_LEN << 2]; __u32 size_tmp = sizeof(tmp); uint32_t retval; - int err; + int err, saved_errno; if (unpriv) set_admin(true); err = bpf_prog_test_run(fd_prog, 1, data, size_data, tmp, &size_tmp, &retval, NULL); + saved_errno = errno; + if (unpriv) set_admin(false); - if (err && errno != 524/*ENOTSUPP*/ && errno != EPERM) { - printf("Unexpected bpf_prog_test_run error "); - return err; + + if (err) { + switch (saved_errno) { + case 524/*ENOTSUPP*/: + printf("Did not run the program (not supported) "); + return 0; + case EPERM: + if (unpriv) { + printf("Did not run the program (no permission) "); + return 0; + } + /* fallthrough; */ + default: + printf("FAIL: Unexpected bpf_prog_test_run error (%s) ", + strerror(saved_errno)); + return err; + } } - if (!err && retval != expected_val && + + if (retval != expected_val && expected_val != POINTER_VALUE) { printf("FAIL retval %d != %d ", retval, expected_val); return 1;