This is a regression test to check whether fsck can handle corrupted
nlinks correctly, it uses inject.f2fs to inject nlinks w/ wrong value,
and expects fsck.f2fs can detect such corruption and do the repair.
Cc: Jaegeuk Kim <jaeg...@kernel.org>
Signed-off-by: Chao Yu <c...@kernel.org>
---
v5:
- clean up codes suggested by Dave.
tests/f2fs/009 | 141 +++++++++++++++++++++++++++++++++++++++++++++
tests/f2fs/009.out | 2 +
2 files changed, 143 insertions(+)
create mode 100755 tests/f2fs/009
create mode 100644 tests/f2fs/009.out
diff --git a/tests/f2fs/009 b/tests/f2fs/009
new file mode 100755
index 00000000..864fdcfb
--- /dev/null
+++ b/tests/f2fs/009
@@ -0,0 +1,141 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2025 Chao Yu. All Rights Reserved.
+#
+# FS QA Test No. f2fs/009
+#
+# This is a regression test to check whether fsck can handle corrupted
+# nlinks correctly, it uses inject.f2fs to inject nlinks w/ wrong value,
+# and expects fsck.f2fs can detect such corruption and do the repair.
+#
+. ./common/preamble
+_begin_fstest auto quick
+
+if [ ! -x "$(type -P socket)" ]; then
+ _notrun "Couldn't find socket"
+fi
+
+_require_scratch
+_require_command "$F2FS_INJECT_PROG" inject.f2fs
+
+_fixed_by_git_commit f2fs-tools 958cd6e \
+ "fsck.f2fs: support to repair corrupted i_links"
+
+filename=$SCRATCH_MNT/foo
+hardlink=$SCRATCH_MNT/bar
+
+_cleanup()
+{
+ if [ -n "$pid" ]; then
+ kill $pid &> /dev/null
+ wait
+ fi
+ cd /
+ rm -r -f $tmp.*
+}
+
+_inject_and_check()
+{
+ local nlink=$1
+ local ino=$2
+
+ echo "ino:"$ino >> $seqres.full
+ echo "nlink:"$nlink >> $seqres.full
+
+ _scratch_unmount
+
+ $F2FS_INJECT_PROG --node --mb i_links --nid $ino --val $nlink
$SCRATCH_DEV \
+ >> $seqres.full || _fail "fail to inject"
+
+ _check_scratch_fs >> $seqres.full 2>&1 && _fail "can't find corruption"
+ _repair_scratch_fs >> $seqres.full
+ _check_scratch_fs >> $seqres.full 2>&1 || _fail "fsck can't fix
corruption"
+
+ _scratch_mount
+ _scratch_unmount
+
+ _scratch_mkfs >> $seqres.full
+ _scratch_mount
+}
+
+inject_and_check()
+{
+ local nlink=$1
+ local create_hardlink=$2
+ local ino=$3
+
+ if [ -z $ino ]; then
+ ino=`stat -c '%i' $filename`
+ fi
+
+ if [ $create_hardlink == 1 ]; then
+ ln $filename $hardlink
+ fi
+
+ _inject_and_check $nlink $ino
+}
+
+_scratch_mkfs >> $seqres.full
+_scratch_mount
+
+touch $filename
+inject_and_check 0 0
+
+mkdir $filename
+inject_and_check 1 0
+
+mknod $filename c 9 0
+inject_and_check 0 0
+
+mknod $filename b 8 0
+inject_and_check 0 0
+
+mkfifo $filename
+inject_and_check 0 0
+
+socket -s $filename >> $seqres.full 2>&1 &
+pid=$!
+sleep 2
+ino=`stat -c '%i' $filename`
+kill $pid >> $seqres.full 2>&1
+inject_and_check 0 0 $ino
+
+ln -s $SCRATCH_MNT/empty $filename
+inject_and_check 0 0
+
+touch $filename
+ino=`stat -c '%i' $filename`
+$F2FS_IO_PROG write 1 0 1 zero atomic_commit $filename 5000 >> $seqres.full
2>&1 &
+stat $filename >> $seqres.full
+rm $filename
+$F2FS_IO_PROG shutdown 1 $SCRATCH_MNT/ >> $seqres.full
+sleep 6
+inject_and_check 1 0 $ino
+
+# hardlink
+touch $filename
+inject_and_check 0 1
+
+mknod $filename c 9 0
+inject_and_check 0 1
+
+mknod $filename b 8 0
+inject_and_check 0 1
+
+mkfifo $filename
+inject_and_check 0 1
+
+socket -s $filename >> $seqres.full 2>&1 &
+pid=$!
+sleep 2
+ino=`stat -c '%i' $filename`
+kill $pid >> $seqres.full 2>&1
+inject_and_check 0 1 $ino
+
+ln -s $SCRATCH_MNT/empty $filename
+inject_and_check 0 1
+
+echo "Silence is golden"
+
+status=0
+exit
diff --git a/tests/f2fs/009.out b/tests/f2fs/009.out
new file mode 100644
index 00000000..7e977155
--- /dev/null
+++ b/tests/f2fs/009.out
@@ -0,0 +1,2 @@
+QA output created by 009
+Silence is golden
--
2.48.1
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
