Date:   Fri,  2 Nov 2018 10:19:25 +0800
From:   Liu Bo <bo.liu@...ux.alibaba.com>
To:     <fstests@...r.kernel.org>
Cc:     <linux-ext4@...r.kernel.org>
Subject: [PATCH] Fstest: ext4: regression test for a ENOSPC warning

This adds a regression test for a ENOSPC warning which can be triggered if
'-odioread_nolock,nodelalloc' and quota are used.

The bug was fixed by patch
"Ext4: fix ENOSPC when both quota and dioread_nolock are enabled".

Signed-off-by: Liu Bo <bo.liu@...ux.alibaba.com>
---
 tests/ext4/034     | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/ext4/034.out | 17 +++++++++++++
 tests/ext4/group   |  1 +
 3 files changed, 93 insertions(+)
 create mode 100755 tests/ext4/034
 create mode 100644 tests/ext4/034.out

diff --git a/tests/ext4/034 b/tests/ext4/034
new file mode 100755
index 00000000..2449c3b7
--- /dev/null
+++ b/tests/ext4/034
@@ -0,0 +1,75 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2018 Liu Bo, Alibaba.  All Rights Reserved.
+#
+# FS QA Test 034
+#
+# Regression test for a ENOSPC warning when both quota and
+# "-o dioread_nolock,nodelalloc" is used.
+#
+# The bug was fixed by commit
+# "Ext4: fix ENOSPC when both quota and dioread_nolock are enabled"
+#
+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
+. ./common/quota
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+
+# Modify as appropriate.
+_supported_fs generic
+_supported_os Linux
+_require_scratch
+_require_quota
+_require_nobody
+
+echo "Format and mount"
+_scratch_mkfs "-O quota" > $seqres.full 2>&1
+_scratch_mount "-o dioread_nolock,nodelalloc" > $seqres.full 2>&1
+quotaon $SCRATCH_MNT 2>/dev/null
+
+echo "Create the original file"
+touch $SCRATCH_MNT/foobar >> $seqres.full
+chown nobody $SCRATCH_MNT/foobar >> $seqres.full
+
+quotaon $SCRATCH_MNT 2>/dev/null
+echo "Set hard quota"
+setquota -u nobody 0 10M 0 0 $SCRATCH_MNT
+_report_quota_blocks $SCRATCH_MNT
+
+echo "Create 2 level extent tree (btree) for foobar with a unwritten extent"
+$XFS_IO_PROG -f -c "pwrite 0 4k" -c "falloc 4k 4k" -c "pwrite 8k 4k" -c "pwrite 20k 4k"  -c "pwrite 28k 4k" -c "pwrite 36k 4k"  -c "fsync" $SCRATCH_MNT/foobar >> $seqres.full
+
+xfs_io -c "fiemap -v" $SCRATCH_MNT/foobar >> $seqres.full
+
+echo "Convert unwritten extent to written and collapse extent tree to inode"
+$XFS_IO_PROG -c "pwrite 4k 4k" $SCRATCH_MNT/foobar >> $seqres.full
+
+echo "Create a new file and do fsync to force a jbd2 commit"
+$XFS_IO_PROG -f -c "pwrite 0 4k" -c "fsync" $SCRATCH_MNT/dummy >> $seqres.full
+
+echo "sync $SCRATCH_MNT to writeback"
+$XFS_IO_PROG -c "syncfs" $SCRATCH_MNT >> $seqres.full
+
+# success, all done
+status=0
+exit
diff --git a/tests/ext4/034.out b/tests/ext4/034.out
new file mode 100644
index 00000000..dd0c8a7c
--- /dev/null
+++ b/tests/ext4/034.out
@@ -0,0 +1,17 @@
+QA output created by 034
+Format and mount
+Create the original file
+Set hard quota
+root 20 0 0
+nobody 0 0 10240
+User soft hard grace
+Block time: 7days; Inode
+Block File limits 
+----------------------------------------------------------------------   
+*** for user quotas
+   
+   
+Create 2 level extent tree (btree) for foobar with a unwritten extent
+Convert unwritten extent to written and collapse extent tree to inode
+Create a new file and do fsync to force a jbd2 commit
+sync /mnt/scratch to writeback
diff --git a/tests/ext4/group b/tests/ext4/group
index b850f568..eb744a12 100644
--- a/tests/ext4/group
+++ b/tests/ext4/group
@@ -36,6 +36,7 @@
 031 auto quick dax
 032 auto quick ioctl resize
 033 auto ioctl resize
+034 auto quick quota
 271 auto rw quick
 301 aio auto ioctl rw stress defrag
 302 aio auto ioctl rw stress defrag
-- 
2.14.2

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