From patchwork Thu Oct 21 16:39:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brian Foster X-Patchwork-Id: 12575831 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D8312C433EF for ; Thu, 21 Oct 2021 16:40:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BC8206138D for ; Thu, 21 Oct 2021 16:40:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232020AbhJUQmT (ORCPT ); Thu, 21 Oct 2021 12:42:19 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:22985 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230072AbhJUQmT (ORCPT ); Thu, 21 Oct 2021 12:42:19 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1634834403; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=grdzU5cJ1VaO4NivgFFBYAsl/r2DD1sdXLgcbXPAYGo=; b=HJig5uCyflHRdV6bpdOtmHRpCeHU0XtA6rKtS+VimFhyXiQCBfVDf1CNNycFek57LQ+qnj aDJZaRfTT9lEGUHt9R0DVOVVecsvAsDxa9Jsv13VyPPzSVcQq1MUhKMfprQPTqNm7YeMXh pcI9rhxVbm85phMW0kG4Crt1bbiJvAg= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-548-uhKMmNHkN0yWb6TyeTR7JQ-1; Thu, 21 Oct 2021 12:40:01 -0400 X-MC-Unique: uhKMmNHkN0yWb6TyeTR7JQ-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A3CFE5074C; Thu, 21 Oct 2021 16:40:00 +0000 (UTC) Received: from bfoster.redhat.com (unknown [10.22.8.90]) by smtp.corp.redhat.com (Postfix) with ESMTP id 434865F4ED; Thu, 21 Oct 2021 16:40:00 +0000 (UTC) From: Brian Foster To: fstests@vger.kernel.org Cc: linux-xfs@vger.kernel.org Subject: [PATCH] generic: test COW writeback failure when overlapping non-shared blocks Date: Thu, 21 Oct 2021 12:39:59 -0400 Message-Id: <20211021163959.1887011-1-bfoster@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Test that COW writeback that overlaps non-shared delalloc blocks does not leave around stale delalloc blocks on I/O failure. This triggers assert failures and free space accounting corruption on XFS. Signed-off-by: Brian Foster --- This test targets the problem addressed by the following patch in XFS: https://lore.kernel.org/linux-xfs/20211021163330.1886516-1-bfoster@redhat.com/ Brian tests/generic/651 | 53 +++++++++++++++++++++++++++++++++++++++++++ tests/generic/651.out | 2 ++ 2 files changed, 55 insertions(+) create mode 100755 tests/generic/651 create mode 100644 tests/generic/651.out diff --git a/tests/generic/651 b/tests/generic/651 new file mode 100755 index 00000000..8d4e6728 --- /dev/null +++ b/tests/generic/651 @@ -0,0 +1,53 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2021 Red Hat, Inc. All Rights Reserved. +# +# FS QA Test 651 +# +# Test that COW writeback that overlaps non-shared delalloc blocks does not +# leave around stale delalloc blocks on I/O failure. This triggers assert +# failures and free space accounting corruption on XFS. +# +. ./common/preamble +_begin_fstest auto quick clone + +_cleanup() +{ + _cleanup_flakey + cd / + rm -r -f $tmp.* +} + +# Import common functions. +. ./common/reflink +. ./common/dmflakey + +# real QA test starts here +_supported_fs generic +_require_scratch_reflink +_require_flakey_with_error_writes + +_scratch_mkfs >> $seqres.full +_init_flakey +_mount_flakey + +# create two files that share a single block +$XFS_IO_PROG -fc "pwrite 4k 4k" $SCRATCH_MNT/file1 >> $seqres.full +cp --reflink $SCRATCH_MNT/file1 $SCRATCH_MNT/file2 + +# Perform a buffered write across the shared and non-shared blocks. On XFS, this +# creates a COW fork extent that covers the shared block as well as the just +# created non-shared delalloc block. Fail the writeback to verify that all +# delayed allocation is cleaned up properly. +_load_flakey_table $FLAKEY_ERROR_WRITES +$XFS_IO_PROG -c "pwrite 0 8k" -c fsync $SCRATCH_MNT/file2 >> $seqres.full +_load_flakey_table $FLAKEY_ALLOW_WRITES + +# Try a post-fail reflink and then unmount. Both of these are known to produce +# errors and/or assert failures on XFS if we trip over a stale delalloc block. +cp --reflink $SCRATCH_MNT/file2 $SCRATCH_MNT/file3 +_unmount_flakey + +# success, all done +status=0 +exit diff --git a/tests/generic/651.out b/tests/generic/651.out new file mode 100644 index 00000000..bd44c80c --- /dev/null +++ b/tests/generic/651.out @@ -0,0 +1,2 @@ +QA output created by 651 +fsync: Input/output error