From mboxrd@z Thu Jan 1 00:00:00 1970 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 AC2A0C4332F for ; Thu, 9 Sep 2021 13:40:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8F09B61206 for ; Thu, 9 Sep 2021 13:40:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236787AbhIINmA (ORCPT ); Thu, 9 Sep 2021 09:42:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:33698 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356448AbhIIMzM (ORCPT ); Thu, 9 Sep 2021 08:55:12 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 02D676324E; Thu, 9 Sep 2021 11:58:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1631188683; bh=9yQVsBKhkMPV/1QFKagHMGFQ/CidzBP1nHpUmOc3MUg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XXu58rGFgvtlFfbnifwwBKjaVZh7QpcIqOrS/6tEMcp7iTMsz+EklAvztEjsC5iBq XuViTQJFuvZWApZxlNT2iwp8Efmyl/EsPG8y6Z0PoAvYGGgluTcDhuSKpnBl0LJWaq VsOIqG5JENF/Du0sB4JbsvDuABuRULGoU2rEeNAvv1mxbXkOFaufuIQaSuFr7QxMXS kAYmjdZ8MRfncL6krJZswUmYhEscPt23EeAK+tuc0Nn4uPMPbMRxZbTpQGtCGZUcEg bvuut8ACAKCiXp7qlYZRK0mZVUHeyiWp2X6idu+hlh8Rr1jbkNTirNUevpmbQ7HUjq iV4Pki191O9zw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Juhee Kang , Andrii Nakryiko , Yonghong Song , Sasha Levin , netdev@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 30/74] samples: bpf: Fix tracex7 error raised on the missing argument Date: Thu, 9 Sep 2021 07:56:42 -0400 Message-Id: <20210909115726.149004-30-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210909115726.149004-1-sashal@kernel.org> References: <20210909115726.149004-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Juhee Kang [ Upstream commit 7d07006f05922b95518be403f08ef8437b67aa32 ] The current behavior of 'tracex7' doesn't consist with other bpf samples tracex{1..6}. Other samples do not require any argument to run with, but tracex7 should be run with btrfs device argument. (it should be executed with test_override_return.sh) Currently, tracex7 doesn't have any description about how to run this program and raises an unexpected error. And this result might be confusing since users might not have a hunch about how to run this program. // Current behavior # ./tracex7 sh: 1: Syntax error: word unexpected (expecting ")") // Fixed behavior # ./tracex7 ERROR: Run with the btrfs device argument! In order to fix this error, this commit adds logic to report a message and exit when running this program with a missing argument. Additionally in test_override_return.sh, there is a problem with multiple directory(tmpmnt) creation. So in this commit adds a line with removing the directory with every execution. Signed-off-by: Juhee Kang Signed-off-by: Andrii Nakryiko Acked-by: Yonghong Song Link: https://lore.kernel.org/bpf/20210727041056.23455-1-claudiajkang@gmail.com Signed-off-by: Sasha Levin --- samples/bpf/test_override_return.sh | 1 + samples/bpf/tracex7_user.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/samples/bpf/test_override_return.sh b/samples/bpf/test_override_return.sh index e68b9ee6814b..35db26f736b9 100755 --- a/samples/bpf/test_override_return.sh +++ b/samples/bpf/test_override_return.sh @@ -1,5 +1,6 @@ #!/bin/bash +rm -r tmpmnt rm -f testfile.img dd if=/dev/zero of=testfile.img bs=1M seek=1000 count=1 DEVICE=$(losetup --show -f testfile.img) diff --git a/samples/bpf/tracex7_user.c b/samples/bpf/tracex7_user.c index ea6dae78f0df..2ed13e9f3fcb 100644 --- a/samples/bpf/tracex7_user.c +++ b/samples/bpf/tracex7_user.c @@ -13,6 +13,11 @@ int main(int argc, char **argv) char command[256]; int ret; + if (!argv[1]) { + fprintf(stderr, "ERROR: Run with the btrfs device argument!\n"); + return 0; + } + snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); if (load_bpf_file(filename)) { -- 2.30.2