[PATCH v4 2/2] f2fs/007: add testcase to check consistency of compressed inode metadata

[Chao Yu <chao@kernel.org>]

metadata of compressed inode should always be consistent after file
compression, reservation, releasement and decompression, let's add
a testcase to check it.

Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Qi Han <hanqi@vivo.com>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Chao Yu <chao@kernel.org>
---
v4:
- fix typo
- add rvb tag from Zorro
 tests/f2fs/007     | 108 +++++++++++++++++++++++++++++++++++++++++++++
 tests/f2fs/007.out |  16 +++++++
 2 files changed, 124 insertions(+)
 create mode 100755 tests/f2fs/007
 create mode 100644 tests/f2fs/007.out

diff --git a/tests/f2fs/007 b/tests/f2fs/007
new file mode 100755
index 00000000..6451d4b4
--- /dev/null
+++ b/tests/f2fs/007
@@ -0,0 +1,108 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2024 Oppo.  All Rights Reserved.
+#
+# FS QA Test No. f2fs/007
+#
+# This is a regression test to check whether compressed metadata
+# can become inconsistent after file compression, reservation
+# releasement, and decompression.
+#
+. ./common/preamble
+_begin_fstest auto quick rw compress
+
+_fixed_by_kernel_commit xxxxxxxxxxxx \
+        "f2fs: compress: fix inconsistent update of i_blocks in release_compress_blocks and reserve_compress_blocks"
+
+_require_scratch
+testfile_prefix=$SCRATCH_MNT/testfile
+fio_config=$tmp.fio
+
+cat >$fio_config <<EOF
+[write_compressed_data_30]
+name=mytest
+ioengine=psync
+rw=write
+direct=0
+bs=1M
+filesize=1M
+numjobs=1
+filename=${testfile_prefix}30
+buffer_compress_percentage=30
+
+[write_compressed_data_60]
+name=mytest
+ioengine=psync
+rw=write
+direct=0
+bs=1M
+filesize=1M
+numjobs=1
+filename=${testfile_prefix}60
+buffer_compress_percentage=60
+
+[write_compressed_data_90]
+name=mytest
+ioengine=psync
+rw=write
+direct=0
+bs=1M
+filesize=1M
+numjobs=1
+filename=${testfile_prefix}90
+buffer_compress_percentage=90
+EOF
+
+_require_fio $fio_config
+_scratch_mkfs "-f -O extra_attr,compression" >> $seqres.full || _fail "mkfs failed"
+_scratch_mount "-o compress_mode=user,compress_extension=*" >> $seqres.full
+
+echo -e "Run fio to initialize file w/ specified compress ratio" >> $seqres.full
+cat $fio_config >> $seqres.full
+$FIO_PROG $fio_config >> $seqres.full
+_scratch_unmount
+
+# force to repair if filesystem is corrupted
+export FSCK_OPTIONS="-f $FSCK_OPTIONS"
+
+for i in 30 60 90; do
+	testfile=$testfile_prefix$i
+
+	_scratch_mount "-o compress_mode=user" >> $seqres.full
+	$F2FS_IO_PROG compress $testfile >> $seqres.full
+	cblocks=`$F2FS_IO_PROG get_cblocks $testfile`
+	echo "compression ratio is: "$cblocks" / 256"
+
+	_scratch_unmount
+
+	# 1. check after compression
+	echo "check fs after compress"
+	_check_scratch_fs
+
+	_scratch_mount >> $seqres.full
+	$F2FS_IO_PROG release_cblocks $testfile >> $seqres.full
+	_scratch_unmount
+
+	# 2. check after releasement
+	echo "check fs after release_cblocks"
+	_check_scratch_fs
+
+	_scratch_mount >> $seqres.full
+	$F2FS_IO_PROG reserve_cblocks $testfile >> $seqres.full
+	_scratch_unmount
+
+	# 3. check after rservation
+	echo "check fs after reserve_cblocks"
+	_check_scratch_fs
+
+	_scratch_mount "-o compress_mode=user" >> $seqres.full
+	$F2FS_IO_PROG decompress $testfile >> $seqres.full
+	_scratch_unmount
+
+	# 4. check after decompression
+	echo "check fs after decompress"
+	_check_scratch_fs
+done
+
+status=0
+exit
diff --git a/tests/f2fs/007.out b/tests/f2fs/007.out
new file mode 100644
index 00000000..a4b76300
--- /dev/null
+++ b/tests/f2fs/007.out
@@ -0,0 +1,16 @@
+QA output created by 007
+compression ratio is: 64 / 256
+check fs after compress
+check fs after release_cblocks
+check fs after reserve_cblocks
+check fs after decompress
+compression ratio is: 128 / 256
+check fs after compress
+check fs after release_cblocks
+check fs after reserve_cblocks
+check fs after decompress
+compression ratio is: 192 / 256
+check fs after compress
+check fs after release_cblocks
+check fs after reserve_cblocks
+check fs after decompress
-- 
2.40.1