From patchwork Wed Nov 4 11:13:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Filipe Manana X-Patchwork-Id: 11880425 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4EF7E14C0 for ; Wed, 4 Nov 2020 11:13:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2C593223AB for ; Wed, 4 Nov 2020 11:13:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604488439; bh=HtXdWfFcyRmD3RvV/2gEjC0LEMcnPqdV9QsZoJ3asFc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=NM9CIcaYowWWCQ7/0tLoMp17ffukNpIS/B7KF59elelBAhjsH7MKR9g+PfU31eMgO fQgJKTiPWkLDeBZJM9dJn6lDd5xd79bXLNMWuYUXlmHcefN2o9m/7+317cJDLP5dvA YeXiCsXngMandG+fdUFUgTePbXjM7Kn3/LoY0Icc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729301AbgKDLN6 (ORCPT ); Wed, 4 Nov 2020 06:13:58 -0500 Received: from mail.kernel.org ([198.145.29.99]:54300 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729243AbgKDLN6 (ORCPT ); Wed, 4 Nov 2020 06:13:58 -0500 Received: from debian8.Home (bl8-197-74.dsl.telepac.pt [85.241.197.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id AE3FC223BD; Wed, 4 Nov 2020 11:13:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604488437; bh=HtXdWfFcyRmD3RvV/2gEjC0LEMcnPqdV9QsZoJ3asFc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0x+ZJiQ68LF5oT01cwT14m86puv63Ctl6ljpDbpLXzwCyX71/MSLva8q/jQmBUx/3 VoOuCIuIVKiNY6mqMQD3YLAxXC1+1IDsyKC1Noyb8oanIZHNZ2YsN9ZsNNcJhxmEbr 3P6s63bS4SaMdUpmX06am0Uvf1d60QXzlnLRtCSg= From: fdmanana@kernel.org To: fstests@vger.kernel.org Cc: linux-btrfs@vger.kernel.org, Filipe Manana Subject: [PATCH 2/2] generic: test for non-zero used blocks while writing into a file Date: Wed, 4 Nov 2020 11:13:53 +0000 Message-Id: <97125f898446b152fd759eba2f2c5963d3daadc0.1604487838.git.fdmanana@suse.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: fstests@vger.kernel.org From: Filipe Manana Test that if we keep overwriting an entire file, either with buffered writes or direct IO writes, the number of used blocks reported by stat(2) is never zero while the writes and writeback are in progress. This is motivated by a bug in btrfs and currently fails on btrfs only. It is fixed a patchset for btrfs that has the following patches: btrfs: fix missing delalloc new bit for new delalloc ranges btrfs: refactor btrfs_drop_extents() to make it easier to extend btrfs: fix race when defragging that leads to unnecessary IO btrfs: update the number of bytes used by an inode atomically Signed-off-by: Filipe Manana Reviewed-by: Josef Bacik --- tests/generic/615 | 77 +++++++++++++++++++++++++++++++++++++++++++ tests/generic/615.out | 3 ++ tests/generic/group | 1 + 3 files changed, 81 insertions(+) create mode 100755 tests/generic/615 create mode 100644 tests/generic/615.out diff --git a/tests/generic/615 b/tests/generic/615 new file mode 100755 index 00000000..e392c4a5 --- /dev/null +++ b/tests/generic/615 @@ -0,0 +1,77 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2020 SUSE Linux Products GmbH. All Rights Reserved. +# +# FS QA Test No. 615 +# +# Test that if we keep overwriting an entire file, either with buffered writes +# or direct IO writes, the number of used blocks reported by stat(2) is never +# zero while the writes and writeback are in progress. +# +seq=`basename $0` +seqres=$RESULT_DIR/$seq +echo "QA output created by $seq" +tmp=/tmp/$$ +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +_cleanup() +{ + cd / + rm -f $tmp.* +} + +# get standard environment, filters and checks +. ./common/rc +. ./common/filter + +# real QA test starts here +_supported_fs generic +_require_scratch +_require_odirect + +rm -f $seqres.full + +stat_loop() +{ + trap "wait; exit" SIGTERM + local filepath=$1 + local blocks + + while :; do + blocks=$(stat -c %b $filepath) + if [ $blocks -eq 0 ]; then + echo "error: stat(2) reported zero blocks" + fi + done +} + +_scratch_mkfs >>$seqres.full 2>&1 +_scratch_mount + +$XFS_IO_PROG -f -s -c "pwrite -b 64K 0 64K" $SCRATCH_MNT/foo >>$seqres.full + +stat_loop $SCRATCH_MNT/foo & +loop_pid=$! + +echo "Testing buffered writes" + +# Now keep overwriting the entire file, triggering writeback after each write, +# while another process is calling stat(2) on the file. We expect the number of +# used blocks reported by stat(2) to be always greater than 0. +for ((i = 0; i < 5000; i++)); do + $XFS_IO_PROG -s -c "pwrite -b 64K 0 64K" $SCRATCH_MNT/foo >>$seqres.full +done + +echo "Testing direct IO writes" + +# Now similar to what we did before but for direct IO writes. +for ((i = 0; i < 5000; i++)); do + $XFS_IO_PROG -d -c "pwrite -b 64K 0 64K" $SCRATCH_MNT/foo >>$seqres.full +done + +kill $loop_pid &> /dev/null +wait + +status=0 +exit diff --git a/tests/generic/615.out b/tests/generic/615.out new file mode 100644 index 00000000..3b549e96 --- /dev/null +++ b/tests/generic/615.out @@ -0,0 +1,3 @@ +QA output created by 615 +Testing buffered writes +Testing direct IO writes diff --git a/tests/generic/group b/tests/generic/group index ab8ae74e..fb3c638c 100644 --- a/tests/generic/group +++ b/tests/generic/group @@ -617,3 +617,4 @@ 612 auto quick clone 613 auto quick encrypt 614 auto quick rw +615 auto rw