This is a regression test to check whether f2fs handles dirty
data correctly when checkpoint is disabled, if lfs mode is on,
it will trigger OPU for all overwritten data, this will cost
free segments, so f2fs must account overwritten data as OPU
data when calculating free space, otherwise, it may run out
of free segments in f2fs' allocation function, resulting in
panic.
Cc: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Signed-off-by: Chao Yu <chao@xxxxxxxxxx>
---
tests/f2fs/006 | 52 ++++++++++++++++++++++++++++++++++++++++++++++
tests/f2fs/006.out | 6 ++++++
2 files changed, 58 insertions(+)
create mode 100755 tests/f2fs/006
create mode 100644 tests/f2fs/006.out
diff --git a/tests/f2fs/006 b/tests/f2fs/006
new file mode 100755
index 00000000..b359ef8f
--- /dev/null
+++ b/tests/f2fs/006
@@ -0,0 +1,52 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2024 Oppo. All Rights Reserved.
+#
+# FS QA Test No. f2fs/006
+#
+# This is a regression test to check whether f2fs handles dirty
+# data correctly when checkpoint is disabled, if lfs mode is on,
+# it will trigger OPU for all overwritten data, this will cost
+# free segments, so f2fs must account overwritten data as OPU
+# data when calculating free space, otherwise, it may run out
+# of free segments in f2fs' allocation function, resulting in
+# panic.
+#
+. ./common/preamble
+_begin_fstest auto quick
+
+_cleanup()
+{
+ rm -f $img
+ _scratch_unmount >> $seqres.full
+ cd /
+ rm -r -f $tmp.*
+}
+
+_require_scratch
+_scratch_mkfs >> $seqres.full
+_scratch_mount >> $seqres.full
+
+img=$SCRATCH_MNT/f2fs.img
+mnt=$SCRATCH_MNT/f2fs.mnt
+testfile=$mnt/testfile
+
+mkdir $mnt
+dd if=/dev/zero of=$img bs=1M count=100 2>/dev/null
+$MKFS_F2FS_PROG -f $img >/dev/null 2>&1
+sync
+
+# use mode=lfs to let f2fs always triggers OPU
+mount -t $FSTYP -o loop,mode=lfs,checkpoint=disable:10%,noinline_dentry $img $mnt
+
+dd if=/dev/zero of=$testfile bs=1M count=50 2>/dev/null
+
+# it may run out of free space of f2fs and hang kernel
+dd if=/dev/zero of=$testfile bs=1M count=50 conv=notrunc conv=fsync
+dd if=/dev/zero of=$testfile bs=1M count=50 conv=notrunc conv=fsync
+
+mount -o remount,checkpoint=enable $mnt
+umount $mnt
+
+status=0
+exit
diff --git a/tests/f2fs/006.out b/tests/f2fs/006.out
new file mode 100644
index 00000000..a2c7ba48
--- /dev/null
+++ b/tests/f2fs/006.out
@@ -0,0 +1,6 @@
+QA output created by 006
+50+0 records in
+50+0 records out
+dd: error writing '/mnt/scratch_f2fs/f2fs.mnt/testfile': No space left on device
+3+0 records in
+2+0 records out
--
2.40.1
