[PATCH] generic: soft quota limits testing within grace time

[Zorro Lang <zlang@kernel.org>]

After soft limits are exceeded, within the grace time, fs quota should
allow more space allocation before exceeding hard limits, even if
allocating many small files.

This case can cover bc37e4fb5cac (xfs: revert "xfs: actually bump
warning counts when we send warnings"). And will help to expose later
behavior changes on this side.

Signed-off-by: Zorro Lang <zlang@redhat.com>
---
 tests/generic/690     | 125 ++++++++++++++++++++++++++++++++++++++++++
 tests/generic/690.out |   2 +
 2 files changed, 127 insertions(+)
 create mode 100755 tests/generic/690
 create mode 100644 tests/generic/690.out

diff --git a/tests/generic/690 b/tests/generic/690
new file mode 100755
index 00000000..b1d055dc
--- /dev/null
+++ b/tests/generic/690
@@ -0,0 +1,125 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2022 Red Hat Inc.  All Rights Reserved.
+#
+# FS QA Test 690
+#
+# Make sure filesystem quota works well, after soft limits are exceeded. The
+# fs quota should allow more space allocation before exceeding hard limits
+# and with in grace time.
+#
+# But different with other similar testing, this case trys to write many small
+# files, to cover bc37e4fb5cac (xfs: revert "xfs: actually bump warning counts
+# when we send warnings"). If there's a behavior change in one day, this case
+# might help to detect that too.
+#
+. ./common/preamble
+_begin_fstest auto quota
+
+# Override the default cleanup function.
+_cleanup()
+{
+	restore_project
+	cd /
+	rm -r -f $tmp.*
+}
+
+# Import common functions.
+. ./common/quota
+
+# real QA test starts here
+_supported_fs generic
+_require_scratch
+_require_quota
+_require_user
+_require_group
+
+create_project()
+{
+	rm -rf $SCRATCH_MNT/t
+	mkdir $SCRATCH_MNT/t
+	$XFS_IO_PROG -r -c "chproj 100" -c "chattr +P" $SCRATCH_MNT/t
+	chmod ugo+rwx $SCRATCH_MNT/t/
+
+	rm -f $tmp.projects $tmp.projid
+	if [ -f /etc/projects ];then
+		cat /etc/projects > $tmp.projects
+	fi
+	if [ -f /etc/projid ];then
+		cat /etc/projid > $tmp.projid
+	fi
+
+	cat >/etc/projects <<EOF
+100:$SCRATCH_MNT/t
+EOF
+	cat >/etc/projid <<EOF
+$qa_user:100
+EOF
+	PROJECT_CHANGED=1
+}
+
+restore_project()
+{
+	if [ "$PROJECT_CHANGED" = "1" ];then
+		rm -f /etc/projects /etc/projid
+		if [ -f $tmp.projects ];then
+			cat $tmp.projects > /etc/projects
+		fi
+		if [ -f $tmp.projid ];then
+			cat $tmp.projid > /etc/projid
+		fi
+	fi
+}
+
+# Make sure the kernel supports project quota
+_scratch_mkfs >$seqres.full 2>&1
+_scratch_enable_pquota
+_qmount_option "prjquota"
+_qmount
+_require_prjquota $SCRATCH_DEV
+
+exercise()
+{
+	local type=$1
+	local file=$SCRATCH_MNT/testfile
+
+	echo "= Test type=$type quota =" >>$seqres.full
+	_scratch_unmount
+	_scratch_mkfs >>$seqres.full 2>&1
+	if [ "$1" = "P" ];then
+		_scratch_enable_pquota
+	fi
+	_qmount
+	if [ "$1" = "P" ];then
+		create_project
+		file=$SCRATCH_MNT/t/testfile
+	fi
+
+	setquota -${type} $qa_user 1M 500M 0 0 $SCRATCH_MNT
+	setquota -${type} -t 86400 86400 $SCRATCH_MNT
+	repquota -v -${type} $SCRATCH_MNT | grep -v "^root" >>$seqres.full 2>&1
+	# Exceed the soft quota limit a bit at first
+	su $qa_user -c "$XFS_IO_PROG -f -t -c 'pwrite 0 2m' -c fsync ${file}.0" >>$seqres.full 2>&1
+	# Write more data more times under soft quota limit exhausted condition,
+	# but not reach hard limit. To make sure the it won't trigger EDQUOT.
+	for ((i=1; i<=100; i++));do
+		su "$qa_user" -c "$XFS_IO_PROG -f -c 'pwrite 0 1m' -c fsync ${file}.$i" >>$seqres.full 2>&1
+		if [ $? -ne 0 ];then
+			log "Unexpected error (type=$type)!"
+			break
+		fi
+	done
+	repquota -v -${type} $SCRATCH_MNT | grep -v "^root" >>$seqres.full 2>&1
+}
+
+_qmount_option "usrquota"
+exercise u
+_qmount_option "grpquota"
+exercise g
+_qmount_option "prjquota"
+exercise P
+
+echo "Silence is golden"
+# success, all done
+status=0
+exit
diff --git a/tests/generic/690.out b/tests/generic/690.out
new file mode 100644
index 00000000..6f3723e3
--- /dev/null
+++ b/tests/generic/690.out
@@ -0,0 +1,2 @@
+QA output created by 690
+Silence is golden
-- 
2.31.1