From patchwork Tue Apr 27 15:00:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Filipe Manana X-Patchwork-Id: 12226797 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=-24.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,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 7A374C433B4 for ; Tue, 27 Apr 2021 15:00:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4387F613D1 for ; Tue, 27 Apr 2021 15:00:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236144AbhD0PBI (ORCPT ); Tue, 27 Apr 2021 11:01:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:35218 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236074AbhD0PBI (ORCPT ); Tue, 27 Apr 2021 11:01:08 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9C7B6613D8; Tue, 27 Apr 2021 15:00:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1619535625; bh=Vxtddy9gYs6muRZA2jdv5xj1sh/30vDF9YtHR+23e5I=; h=From:To:Cc:Subject:Date:From; b=t3weoLX/x1XYvEKX/s0yigYAzIfpyEmjLr9K6mmeZ+6Q0Pas9qA63aHLM0mgyo4uU qHNz7vS7J36VnGArV/Yt7bmevzvJrhckaVcFgY8wRjlGp3mu+BBV+RZ2FHORG2Ddv7 qS434oXoW/dyX9Zti0Fy+hKklMLQk5mLAFxqad6Hh/CUkksMMJJxE8ItitVmzKYaBi WicQRsxvAVZoHqGtmMFXwAkzowSUPoqck49oVrhM+kGaCm2hVfUIQRqg5SJk2EI24b MByL6VaGQKtaZ/a/yI7jVFwI92imaFs0huqaSRD7aO9X+YNE/v0crA4d/vhwJ/00Br Bo7EgAqH+kogg== From: fdmanana@kernel.org To: fstests@vger.kernel.org Cc: linux-btrfs@vger.kernel.org, Filipe Manana Subject: [PATCH] btrfs/187: fix test failure when using bash 5.0+ with debug enabled Date: Tue, 27 Apr 2021 16:00:09 +0100 Message-Id: <70ecc4413ac118ac95be3e76b0dabff237d70b8d.1619535331.git.fdmanana@suse.com> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: fstests@vger.kernel.org From: Filipe Manana When running btrfs/187 with a bash 5.0+ build that has debug enabled, the test fails due to an unexpected warning message from bash: $ ./check btrfs/187 FSTYP -- btrfs PLATFORM -- Linux/x86_64 debian9 5.12.0-rc8-btrfs-next-92 #1 SMP PREEMPT Wed Apr 21 10:36:03 WEST 2021 MKFS_OPTIONS -- /dev/sdc MOUNT_OPTIONS -- /dev/sdc /home/fdmanana/btrfs-tests/scratch_1 btrfs/187 436s ... - output mismatch (see /xfstests/results//btrfs/187.out.bad) --- tests/btrfs/187.out 2020-10-16 23:13:46.550152492 +0100 +++ /xfstests/results//btrfs/187.out.bad 2021-04-27 14:57:02.623941700 +0100 @@ -1,3 +1,4 @@ QA output created by 187 Create a readonly snapshot of 'SCRATCH_MNT' in 'SCRATCH_MNT/snap1' Create a readonly snapshot of 'SCRATCH_MNT' in 'SCRATCH_MNT/snap2' +/xfstests/tests/btrfs/187: line 1: warning: wait_for: recursively setting old_sigint_handler to wait_sigint_handler: running_trap = 16 ... (Run 'diff -u /xfstests/tests/btrfs/187.out /xfstests/results//btrfs/187.out.bad' to see the entire diff) Ran: btrfs/187 Failures: btrfs/187 Failed 1 of 1 tests This is because the process running dedupe_files_loop() executes the 'wait' command in the trap it has setup and very often it receives the SIGTERM signal while it is running the 'wait' command in the while loop of that function - so executing the trap makes bash run 'wait' while it is already running 'wait', triggering the warning message from bash. That warning message was added in bash 5.0 by commit 36f89ff1d8b761 ("SIGINT trap handler SIGINT loop fix"): https://git.savannah.gnu.org/cgit/bash.git/commit/?id=36f89ff1d8b761c815d8993e9833e6357a57fc6b So fix this by making the trap set a local variable named 'stop' to the value 1 and have the loop exit when the local variable 'stop' is 1. Signed-off-by: Filipe Manana Reviewed-by: Boris Burkov --- tests/btrfs/187 | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/tests/btrfs/187 b/tests/btrfs/187 index b2d3e4f0..7da09abd 100755 --- a/tests/btrfs/187 +++ b/tests/btrfs/187 @@ -64,9 +64,19 @@ dedupe_two_files() dedupe_files_loop() { - trap "wait; exit" SIGTERM - - while true; do + local stop=0 + + # Avoid executing 'wait' inside the trap, because when we receive + # SIGTERM we might be already executing the wait command in the while + # loop below. When that is the case, bash 5.0+ with debug enabled prints + # a warning message that makes the test fail due to a mismatch with the + # golden output. That warning message is the following: + # + # warning: wait_for: recursively setting old_sigint_handler to wait_sigint_handler: running_trap = 16 + # + trap "stop=1" SIGTERM + + while [ $stop -eq 0 ]; do for ((i = 1; i <= 5; i++)); do dedupe_two_files & done