[PATCH 1/2] f2fs/021: test quota mount option

[Chao Yu <chao@kernel.org>]

This testcase tries to check whether f2fs can handle "usrjquota="
during remount correctly, it expects kernel will encounter NULL
pointer dereference bug w/o the fix ("f2fs: fix to avoid NULL pointer
dereference in f2fs_check_quota_consistency()").

Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Chao Yu <chao@kernel.org>
---
 tests/f2fs/021     | 30 ++++++++++++++++++++++++++++++
 tests/f2fs/021.out |  2 ++
 2 files changed, 32 insertions(+)
 create mode 100755 tests/f2fs/021
 create mode 100644 tests/f2fs/021.out

diff --git a/tests/f2fs/021 b/tests/f2fs/021
new file mode 100755
index 00000000..c41760fc
--- /dev/null
+++ b/tests/f2fs/021
@@ -0,0 +1,30 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2025 Chao Yu.  All Rights Reserved.
+#
+# FS QA Test No. f2fs/021
+#
+# This testcase tries to check whether f2fs can handle "usrjquota="
+# during remount correctly
+#
+. ./common/preamble
+_begin_fstest auto quick mount
+
+_fixed_by_kernel_commit xxxxxxxxxxxx \
+	"f2fs: fix to avoid NULL pointer dereference in f2fs_check_quota_consistency()"
+
+_require_scratch
+
+_scratch_mkfs >> $seqres.full
+_scratch_mount "-o usrquota"
+quotacheck -uc $SCRATCH_MNT
+_scratch_unmount
+
+_scratch_mount "-o usrjquota=aquota.user,jqfmt=vfsold"
+_scratch_mount "-o remount,usrjquota=,jqfmt=vfsold"
+_scratch_unmount
+
+echo "Silence is golden"
+
+status=0
+exit
diff --git a/tests/f2fs/021.out b/tests/f2fs/021.out
new file mode 100644
index 00000000..09f4062d
--- /dev/null
+++ b/tests/f2fs/021.out
@@ -0,0 +1,2 @@
+QA output created by 021
+Silence is golden
-- 
2.49.0