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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 82B47C169C4 for ; Tue, 29 Jan 2019 07:27:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4E2D12175B for ; Tue, 29 Jan 2019 07:27:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726861AbfA2H1z (ORCPT ); Tue, 29 Jan 2019 02:27:55 -0500 Received: from mx2.suse.de ([195.135.220.15]:42344 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725536AbfA2H1z (ORCPT ); Tue, 29 Jan 2019 02:27:55 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 6408BAE58; Tue, 29 Jan 2019 07:27:54 +0000 (UTC) From: Qu Wenruo To: linux-btrfs@vger.kernel.org Cc: fstests@vger.kernel.org Subject: [PATCH] btrfs: Test if btrfs will report false ENOSPC error balnacing small metadata chunk Date: Tue, 29 Jan 2019 15:27:49 +0800 Message-Id: <20190129072749.494-1-wqu@suse.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org This is a long existing bug, caused by over-estimated metadata space_info::bytes_may_use. There is one purposed patch for btrfs-progs to fix it, titled: "btrfs-progs: balance: Sync the fs before balancing metadata chunks" The test case itself is almost the same as btrfs/181, which use small files to bump a reserved space to trigger the false alert. Signed-off-by: Qu Wenruo --- tests/btrfs/182 | 60 +++++++++++++++++++++++++++++++++++++++++++++ tests/btrfs/182.out | 2 ++ tests/btrfs/group | 1 + 3 files changed, 63 insertions(+) create mode 100755 tests/btrfs/182 create mode 100644 tests/btrfs/182.out diff --git a/tests/btrfs/182 b/tests/btrfs/182 new file mode 100755 index 00000000..61efcb9e --- /dev/null +++ b/tests/btrfs/182 @@ -0,0 +1,60 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2019 SUSE Linux Products GmbH. All Rights Reserved. +# +# FS QA Test 182 +# +# Test if balance will report false ENOSPC error +# +# This is a long existing bug, caused by over-estimated metadata +# space_info::bytes_may_use. +# There is one purposed patch for btrfs-progs to fix it, titled: +# "btrfs-progs: balance: Sync the fs before balancing metadata chunks" +# +seq=`basename $0` +seqres=$RESULT_DIR/$seq +echo "QA output created by $seq" + +here=`pwd` +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 + +# remove previous $seqres.full before test +rm -f $seqres.full + +# real QA test starts here + +# Modify as appropriate. +_supported_fs btrfs +_supported_os Linux +_require_scratch + +nr_files=1024 + +_scratch_mkfs > /dev/null +_scratch_mount + +$BTRFS_UTIL_PROG subv create "$SCRATCH_MNT/subvol" > /dev/null + +# Create some small files to take up enough metadata reserved space +for ((i = 0; i < $nr_files; i++)) do + _pwrite_byte 0xcd 0 1K "$SCRATCH_MNT/subvol/file_$i" > /dev/null +done + +$BTRFS_UTIL_PROG balance start -m "$SCRATCH_MNT" > /dev/null + +# success, all done +echo "Silence is golden" +status=0 +exit diff --git a/tests/btrfs/182.out b/tests/btrfs/182.out new file mode 100644 index 00000000..53d28e50 --- /dev/null +++ b/tests/btrfs/182.out @@ -0,0 +1,2 @@ +QA output created by 182 +Silence is golden diff --git a/tests/btrfs/group b/tests/btrfs/group index 0db485cb..e32c84e4 100644 --- a/tests/btrfs/group +++ b/tests/btrfs/group @@ -184,3 +184,4 @@ 179 auto qgroup dangerous 180 auto quick qgroup limit 181 auto quick balance +182 auto quick balance -- 2.18.0