[PATCH v4 1/6] common/config: remove redundant export variables

[PATCH v4 1/6] common/config: remove redundant export variables

[Chao Yu]

F2FS_IO_PROG and TIMEOUT_PROG are exported twice, remove the redudant
one.

Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Reviewed-by: David Disseldorp <ddiss@suse.de>
Signed-off-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Chao Yu <chao@kernel.org>
---
 common/config | 2 --
 1 file changed, 2 deletions(-)

diff --git a/common/config b/common/config
index 2afbda14..aa525825 100644
--- a/common/config
+++ b/common/config
@@ -191,7 +191,6 @@ export XFS_COPY_PROG="$(type -P xfs_copy)"
 export FSTRIM_PROG="$(type -P fstrim)"
 export DUMPE2FS_PROG="$(type -P dumpe2fs)"
 export RESIZE2FS_PROG="$(type -P resize2fs)"
-export F2FS_IO_PROG="$(type -P f2fs_io)"
 export FIO_PROG="$(type -P fio)"
 export FILEFRAG_PROG="$(type -P filefrag)"
 export E4DEFRAG_PROG="$(type -P e4defrag)"
@@ -220,7 +219,6 @@ export UBIUPDATEVOL_PROG="$(type -P ubiupdatevol)"
 export THIN_CHECK_PROG="$(type -P thin_check)"
 export PYTHON3_PROG="$(type -P python3)"
 export SQLITE3_PROG="$(type -P sqlite3)"
-export TIMEOUT_PROG="$(type -P timeout)"
 export SETCAP_PROG="$(type -P setcap)"
 export GETCAP_PROG="$(type -P getcap)"
 export CAPSH_PROG="$(type -P capsh)"
-- 
2.48.1

[PATCH v4 2/6] common/config: export F2FS_INJECT_PROG

[Chao Yu]

export F2FS_INJECT_PROG w/ inject.f2fs, it can be used for fault injection.

Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Reviewed-by: David Disseldorp <ddiss@suse.de>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Chao Yu <chao@kernel.org>
---
v4:
- no changes
 common/config | 1 +
 1 file changed, 1 insertion(+)

diff --git a/common/config b/common/config
index aa525825..7d017a05 100644
--- a/common/config
+++ b/common/config
@@ -316,6 +316,7 @@ export MKFS_BTRFS_PROG=$(set_mkfs_prog_path_with_opts btrfs)
 export MKFS_F2FS_PROG=$(set_mkfs_prog_path_with_opts f2fs)
 export DUMP_F2FS_PROG=$(type -P dump.f2fs)
 export F2FS_IO_PROG=$(type -P f2fs_io)
+export F2FS_INJECT_PROG=$(type -P inject.f2fs)
 export BTRFS_UTIL_PROG=$(type -P btrfs)
 export BTRFS_SHOW_SUPER_PROG=$(type -P btrfs-show-super)
 export BTRFS_CONVERT_PROG=$(type -P btrfs-convert)
-- 
2.48.1

[PATCH v4 3/6] common/config: export F2FS_FSCK_PROG

[Chao Yu]

Let's export F2FS_FSCK_PROG, then we can use it in
_check_f2fs_filesystem() later.

Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Chao Yu <chao@kernel.org>
---
v4:
- no changes
 common/config | 1 +
 1 file changed, 1 insertion(+)

diff --git a/common/config b/common/config
index 7d017a05..79bec87f 100644
--- a/common/config
+++ b/common/config
@@ -317,6 +317,7 @@ export MKFS_F2FS_PROG=$(set_mkfs_prog_path_with_opts f2fs)
 export DUMP_F2FS_PROG=$(type -P dump.f2fs)
 export F2FS_IO_PROG=$(type -P f2fs_io)
 export F2FS_INJECT_PROG=$(type -P inject.f2fs)
+export F2FS_FSCK_PROG=$(type -P fsck.f2fs)
 export BTRFS_UTIL_PROG=$(type -P btrfs)
 export BTRFS_SHOW_SUPER_PROG=$(type -P btrfs-show-super)
 export BTRFS_CONVERT_PROG=$(type -P btrfs-convert)
-- 
2.48.1

[PATCH v4 4/6] common/rc: use -f for mkfs.f2fs by default

[Chao Yu]

Otherwise, mkfs will fail due to there is an existing filesystem
in the image.

Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Chao Yu <chao@kernel.org>
---
v4:
- no changes
 common/rc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/common/rc b/common/rc
index ca755055..23b642f4 100644
--- a/common/rc
+++ b/common/rc
@@ -993,7 +993,7 @@ _scratch_mkfs()
 		mkfs_filter="grep -v -e ^Warning: -e \"^mke2fs \""
 		;;
 	f2fs)
-		mkfs_cmd="$MKFS_F2FS_PROG"
+		mkfs_cmd="$MKFS_F2FS_PROG -f"
 		mkfs_filter="cat"
 		;;
 	ocfs2)
@@ -1336,7 +1336,7 @@ _try_scratch_mkfs_sized()
 	f2fs)
 		# mkfs.f2fs requires # of sectors as an input for the size
 		local sector_size=`blockdev --getss $SCRATCH_DEV`
-		$MKFS_F2FS_PROG $MKFS_OPTIONS "$@" $SCRATCH_DEV `expr $fssize / $sector_size`
+		$MKFS_F2FS_PROG -f $MKFS_OPTIONS "$@" $SCRATCH_DEV `expr $fssize / $sector_size`
 		;;
 	tmpfs)
 		local free_mem=`_free_memory_bytes`
-- 
2.48.1

[PATCH v4 5/6] common/rc: introduce _check_f2fs_filesystem()

[Chao Yu]

_check_generic_filesystem() will fail the test once it detects
corruption, let's introduce _check_f2fs_filesystem() to just check
filesystem w/ --dry-run option, and return the error number, then
let caller to decide whether the corruption is as expected or not.

Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Chao Yu <chao@kernel.org>
---
v4:
- clean up $FSTYP and $FSCK_OPTIONS
- dump formated logs to seqres.full once fsck detects the corruption.
 common/rc | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/common/rc b/common/rc
index 23b642f4..43d3fe42 100644
--- a/common/rc
+++ b/common/rc
@@ -3519,6 +3519,50 @@ _check_generic_filesystem()
     return 0
 }
 
+_check_f2fs_filesystem()
+{
+    local device=$1
+
+    # If type is set, we're mounted
+    local type=`_fs_type $device`
+    local ok=1
+
+    if [ "$type" = "f2fs" ]
+    then
+        # mounted ...
+        local mountpoint=`_umount_or_remount_ro $device`
+    fi
+
+    $F2FS_FSCK_PROG --dry-run $device >$tmp.fsck.f2fs 2>&1
+    if [ $? -ne 0 ];then
+        _log_err "_check_f2fs_filesystem: filesystem on $device is inconsistent"
+        echo "*** fsck.f2fs output ***" >>$seqres.full
+        cat $tmp.fsck.f2fs              >>$seqres.full
+        echo "*** end fsck.f2fs output" >>$seqres.full
+
+    ok=0
+    fi
+    rm -f $tmp.fsck.f2fs
+
+    if [ $ok -eq 0 ]
+    then
+        echo "*** mount output ***"		>>$seqres.full
+        _mount					>>$seqres.full
+        echo "*** end mount output"		>>$seqres.full
+    elif [ "$type" = "f2fs" ]
+    then
+	# was mounted ...
+	_mount_or_remount_rw "$MOUNT_OPTIONS" $device $mountpoint
+	ok=$?
+    fi
+
+    if [ $ok -eq 0 ]; then
+	return 1
+    fi
+
+    return 0
+}
+
 # Filter the knowen errors the UDF Verifier reports.
 _udf_test_known_error_filter()
 {
@@ -3623,6 +3667,9 @@ _check_test_fs()
     ubifs)
 	# there is no fsck program for ubifs yet
 	;;
+    f2fs)
+        _check_f2fs_filesystem $TEST_DEV
+        ;;
     *)
 	_check_generic_filesystem $TEST_DEV
 	;;
@@ -3679,6 +3726,9 @@ _check_scratch_fs()
     ubifs)
 	# there is no fsck program for ubifs yet
 	;;
+    f2fs)
+        _check_f2fs_filesystem $device
+        ;;
     *)
 	_check_generic_filesystem $device
 	;;
-- 
2.48.1

[PATCH v4 6/6] f2fs/009: detect and repair nlink corruption

[Chao Yu]

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 <jaegeuk@kernel.org>
Signed-off-by: Chao Yu <chao@kernel.org>
---
v4:
- remove unnecessary "_require_command fsck.f2fs"
- clean up _fixed_by_git_commit line
- fix to clean all tmp files in _cleanup
 tests/f2fs/009     | 147 +++++++++++++++++++++++++++++++++++++++++++++
 tests/f2fs/009.out |   2 +
 2 files changed, 149 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..9120d8a5
--- /dev/null
+++ b/tests/f2fs/009
@@ -0,0 +1,147 @@
+#! /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.*
+}
+
+for ((i=0;i<14;i++)) do
+	echo "round: " $i >> $seqres.full
+
+	_scratch_mkfs >> $seqres.full
+	_scratch_mount
+
+	if [ $i == 0 ]; then
+		touch $filename
+		ino=`stat -c '%i' $filename`
+		nlink=0
+	elif [ $i == 1 ]; then
+		mkdir $filename
+		ino=`stat -c '%i' $filename`
+		nlink=1
+	elif [ $i == 2 ]; then
+		mknod $filename c 9 0
+		ino=`stat -c '%i' $filename`
+		nlink=0
+	elif [ $i == 3 ]; then
+		mknod $filename b 8 0
+		ino=`stat -c '%i' $filename`
+		nlink=0
+	elif [ $i == 4 ]; then
+		mkfifo $filename
+		ino=`stat -c '%i' $filename`
+		nlink=0
+	elif [ $i == 5 ]; then
+		socket -s $filename >> $seqres.full 2>&1 &
+		pid=$!
+		sleep 2
+		ino=`stat -c '%i' $filename`
+		kill $pid >> $seqres.full 2>&1
+		nlink=0
+	elif [ $i == 6 ]; then
+		ln -s $SCRATCH_MNT/empty $filename
+		ino=`stat -c '%i' $filename`
+		nlink=0
+	elif [ $i == 7 ]; then
+		# orphan inode
+		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
+		nlink=1
+	elif [ $i == 8 ]; then
+		# hardlink on file
+		touch $filename
+		ino=`stat -c '%i' $filename`
+		ln $filename $hardlink
+		nlink=0
+	elif [ $i == 9 ]; then
+		# hardlink on charactor
+		mknod $filename c 9 0
+		ino=`stat -c '%i' $filename`
+		ln $filename $hardlink
+		nlink=0
+	elif [ $i == 10 ]; then
+		# hardlink on blockdev
+		mknod $filename b 8 0
+		ino=`stat -c '%i' $filename`
+		ln $filename $hardlink
+		nlink=0
+	elif [ $i == 11 ]; then
+		# hardlink on pipe
+		mkfifo $filename
+		ino=`stat -c '%i' $filename`
+		ln $filename $hardlink
+		nlink=0
+	elif [ $i == 12 ]; then
+		# hardlink on socket
+		socket -s $filename >> $seqres.full 2>&1 &
+		pid=$!
+		sleep 2
+		ino=`stat -c '%i' $filename`
+		kill $pid >> $seqres.full 2>&1
+		ln $filename $hardlink
+		nlink=0
+	elif [ $i == 13 ]; then
+		# hardlink on symlink
+		ln -s $SCRATCH_MNT/empty $filename
+		ino=`stat -c '%i' $filename`
+		ln $filename $hardlink
+		nlink=0
+	fi
+
+	if [ $i != 7 ]; then
+		stat $SCRATCH_MNT/* >> $seqres.full
+	fi
+	echo "ino:"$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
+done
+
+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

Re: [PATCH v4 6/6] f2fs/009: detect and repair nlink corruption

[Zorro Lang]

On Wed, Mar 12, 2025 at 03:23:09PM +0800, Chao Yu wrote:
> 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 <jaegeuk@kernel.org>
> Signed-off-by: Chao Yu <chao@kernel.org>
> ---
> v4:
> - remove unnecessary "_require_command fsck.f2fs"
> - clean up _fixed_by_git_commit line
> - fix to clean all tmp files in _cleanup
>  tests/f2fs/009     | 147 +++++++++++++++++++++++++++++++++++++++++++++
>  tests/f2fs/009.out |   2 +
>  2 files changed, 149 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..9120d8a5
> --- /dev/null
> +++ b/tests/f2fs/009
> @@ -0,0 +1,147 @@
> +#! /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

Hi Chao,

Which package provides this "socket" command? I tried to search it in Fedora, but
got nothing:

  # yum search */socket
  Updating and loading repositories:
   Fedora - Rawhide - Developmental packages for the next Fedora release                                              100% |  19.1 KiB/s |  23.6 KiB |  00m01s
   Fedora - Rawhide - Developmental packages for the next Fedora release                                              100% | 694.7 KiB/s |   6.9 MiB |  00m10s
  Repositories loaded.
  No matches found.

If it's a program by yourself, we might can put it in xfstests/src/socket.c?

Thanks,
Zorro

> +	_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.*
> +}
> +
> +for ((i=0;i<14;i++)) do
> +	echo "round: " $i >> $seqres.full
> +
> +	_scratch_mkfs >> $seqres.full
> +	_scratch_mount
> +
> +	if [ $i == 0 ]; then
> +		touch $filename
> +		ino=`stat -c '%i' $filename`
> +		nlink=0
> +	elif [ $i == 1 ]; then
> +		mkdir $filename
> +		ino=`stat -c '%i' $filename`
> +		nlink=1
> +	elif [ $i == 2 ]; then
> +		mknod $filename c 9 0
> +		ino=`stat -c '%i' $filename`
> +		nlink=0
> +	elif [ $i == 3 ]; then
> +		mknod $filename b 8 0
> +		ino=`stat -c '%i' $filename`
> +		nlink=0
> +	elif [ $i == 4 ]; then
> +		mkfifo $filename
> +		ino=`stat -c '%i' $filename`
> +		nlink=0
> +	elif [ $i == 5 ]; then
> +		socket -s $filename >> $seqres.full 2>&1 &
> +		pid=$!
> +		sleep 2
> +		ino=`stat -c '%i' $filename`
> +		kill $pid >> $seqres.full 2>&1
> +		nlink=0
> +	elif [ $i == 6 ]; then
> +		ln -s $SCRATCH_MNT/empty $filename
> +		ino=`stat -c '%i' $filename`
> +		nlink=0
> +	elif [ $i == 7 ]; then
> +		# orphan inode
> +		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
> +		nlink=1
> +	elif [ $i == 8 ]; then
> +		# hardlink on file
> +		touch $filename
> +		ino=`stat -c '%i' $filename`
> +		ln $filename $hardlink
> +		nlink=0
> +	elif [ $i == 9 ]; then
> +		# hardlink on charactor
> +		mknod $filename c 9 0
> +		ino=`stat -c '%i' $filename`
> +		ln $filename $hardlink
> +		nlink=0
> +	elif [ $i == 10 ]; then
> +		# hardlink on blockdev
> +		mknod $filename b 8 0
> +		ino=`stat -c '%i' $filename`
> +		ln $filename $hardlink
> +		nlink=0
> +	elif [ $i == 11 ]; then
> +		# hardlink on pipe
> +		mkfifo $filename
> +		ino=`stat -c '%i' $filename`
> +		ln $filename $hardlink
> +		nlink=0
> +	elif [ $i == 12 ]; then
> +		# hardlink on socket
> +		socket -s $filename >> $seqres.full 2>&1 &
> +		pid=$!
> +		sleep 2
> +		ino=`stat -c '%i' $filename`
> +		kill $pid >> $seqres.full 2>&1
> +		ln $filename $hardlink
> +		nlink=0
> +	elif [ $i == 13 ]; then
> +		# hardlink on symlink
> +		ln -s $SCRATCH_MNT/empty $filename
> +		ino=`stat -c '%i' $filename`
> +		ln $filename $hardlink
> +		nlink=0
> +	fi
> +
> +	if [ $i != 7 ]; then
> +		stat $SCRATCH_MNT/* >> $seqres.full
> +	fi
> +	echo "ino:"$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
> +done
> +
> +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
> 

Re: [PATCH v4 6/6] f2fs/009: detect and repair nlink corruption

[Chao Yu]

On 3/25/25 09:07, Zorro Lang wrote:
> On Wed, Mar 12, 2025 at 03:23:09PM +0800, Chao Yu wrote:
>> 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 <jaegeuk@kernel.org>
>> Signed-off-by: Chao Yu <chao@kernel.org>
>> ---
>> v4:
>> - remove unnecessary "_require_command fsck.f2fs"
>> - clean up _fixed_by_git_commit line
>> - fix to clean all tmp files in _cleanup
>>  tests/f2fs/009     | 147 +++++++++++++++++++++++++++++++++++++++++++++
>>  tests/f2fs/009.out |   2 +
>>  2 files changed, 149 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..9120d8a5
>> --- /dev/null
>> +++ b/tests/f2fs/009
>> @@ -0,0 +1,147 @@
>> +#! /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
> 
> Hi Chao,
> 
> Which package provides this "socket" command? I tried to search it in Fedora, but
> got nothing:
> 
>   # yum search */socket
>   Updating and loading repositories:
>    Fedora - Rawhide - Developmental packages for the next Fedora release                                              100% |  19.1 KiB/s |  23.6 KiB |  00m01s
>    Fedora - Rawhide - Developmental packages for the next Fedora release                                              100% | 694.7 KiB/s |   6.9 MiB |  00m10s
>   Repositories loaded.
>   No matches found.
> 
> If it's a program by yourself, we might can put it in xfstests/src/socket.c?

Hi Zorro,

It's not a program from me, I just installed it w/ "sudo apt install socket", can
you try that?

Thanks,

> 
> Thanks,
> Zorro
> 
>> +	_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.*
>> +}
>> +
>> +for ((i=0;i<14;i++)) do
>> +	echo "round: " $i >> $seqres.full
>> +
>> +	_scratch_mkfs >> $seqres.full
>> +	_scratch_mount
>> +
>> +	if [ $i == 0 ]; then
>> +		touch $filename
>> +		ino=`stat -c '%i' $filename`
>> +		nlink=0
>> +	elif [ $i == 1 ]; then
>> +		mkdir $filename
>> +		ino=`stat -c '%i' $filename`
>> +		nlink=1
>> +	elif [ $i == 2 ]; then
>> +		mknod $filename c 9 0
>> +		ino=`stat -c '%i' $filename`
>> +		nlink=0
>> +	elif [ $i == 3 ]; then
>> +		mknod $filename b 8 0
>> +		ino=`stat -c '%i' $filename`
>> +		nlink=0
>> +	elif [ $i == 4 ]; then
>> +		mkfifo $filename
>> +		ino=`stat -c '%i' $filename`
>> +		nlink=0
>> +	elif [ $i == 5 ]; then
>> +		socket -s $filename >> $seqres.full 2>&1 &
>> +		pid=$!
>> +		sleep 2
>> +		ino=`stat -c '%i' $filename`
>> +		kill $pid >> $seqres.full 2>&1
>> +		nlink=0
>> +	elif [ $i == 6 ]; then
>> +		ln -s $SCRATCH_MNT/empty $filename
>> +		ino=`stat -c '%i' $filename`
>> +		nlink=0
>> +	elif [ $i == 7 ]; then
>> +		# orphan inode
>> +		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
>> +		nlink=1
>> +	elif [ $i == 8 ]; then
>> +		# hardlink on file
>> +		touch $filename
>> +		ino=`stat -c '%i' $filename`
>> +		ln $filename $hardlink
>> +		nlink=0
>> +	elif [ $i == 9 ]; then
>> +		# hardlink on charactor
>> +		mknod $filename c 9 0
>> +		ino=`stat -c '%i' $filename`
>> +		ln $filename $hardlink
>> +		nlink=0
>> +	elif [ $i == 10 ]; then
>> +		# hardlink on blockdev
>> +		mknod $filename b 8 0
>> +		ino=`stat -c '%i' $filename`
>> +		ln $filename $hardlink
>> +		nlink=0
>> +	elif [ $i == 11 ]; then
>> +		# hardlink on pipe
>> +		mkfifo $filename
>> +		ino=`stat -c '%i' $filename`
>> +		ln $filename $hardlink
>> +		nlink=0
>> +	elif [ $i == 12 ]; then
>> +		# hardlink on socket
>> +		socket -s $filename >> $seqres.full 2>&1 &
>> +		pid=$!
>> +		sleep 2
>> +		ino=`stat -c '%i' $filename`
>> +		kill $pid >> $seqres.full 2>&1
>> +		ln $filename $hardlink
>> +		nlink=0
>> +	elif [ $i == 13 ]; then
>> +		# hardlink on symlink
>> +		ln -s $SCRATCH_MNT/empty $filename
>> +		ino=`stat -c '%i' $filename`
>> +		ln $filename $hardlink
>> +		nlink=0
>> +	fi
>> +
>> +	if [ $i != 7 ]; then
>> +		stat $SCRATCH_MNT/* >> $seqres.full
>> +	fi
>> +	echo "ino:"$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
>> +done
>> +
>> +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
>>
> 

Re: [PATCH v4 6/6] f2fs/009: detect and repair nlink corruption

[Dave Chinner]

On Wed, Mar 12, 2025 at 03:23:09PM +0800, Chao Yu wrote:
> 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 <jaegeuk@kernel.org>
> Signed-off-by: Chao Yu <chao@kernel.org>
> ---
> v4:
> - remove unnecessary "_require_command fsck.f2fs"
> - clean up _fixed_by_git_commit line
> - fix to clean all tmp files in _cleanup
>  tests/f2fs/009     | 147 +++++++++++++++++++++++++++++++++++++++++++++
>  tests/f2fs/009.out |   2 +
>  2 files changed, 149 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..9120d8a5
> --- /dev/null
> +++ b/tests/f2fs/009
> @@ -0,0 +1,147 @@
> +#! /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.*
> +}
> +
> +for ((i=0;i<14;i++)) do
> +	echo "round: " $i >> $seqres.full
> +
> +	_scratch_mkfs >> $seqres.full
> +	_scratch_mount
> +
> +	if [ $i == 0 ]; then
> +		touch $filename
> +		ino=`stat -c '%i' $filename`
> +		nlink=0
> +	elif [ $i == 1 ]; then
.....

Ok, it works, but it's a bit nasty. You want to run the same
injection and checking on all types of inodes, so factor that out
like so:

inject_and_check()
{
	local nlink=$1
	local ino=`stat -c '%i' $filename`

	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
}

And now most of the test cases become this:

_scratch_mkfs >> $seqres.full
_scratch_mount

touch $filename
inject_and_check 0

mkdir $filename
inject_and_check 1

mknod $filename c 9 0
inject_and_check 0

mknod $filename b 8 0
inject_and_check 0

.....

The whacky cases with socket and orphan inodes can be handled
by factoring inject_and_check so there's a second function that
takes both ino and nlink as parameters.

This gets rid of all the unnecessary if/elif logic and looping, 
leaving only the test code that does the work behind.

-Dave.
-- 
Dave Chinner
david@fromorbit.com

Re: [PATCH v4 6/6] f2fs/009: detect and repair nlink corruption

[Chao Yu]

On 3/25/25 17:15, Dave Chinner wrote:
> On Wed, Mar 12, 2025 at 03:23:09PM +0800, Chao Yu wrote:
>> 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 <jaegeuk@kernel.org>
>> Signed-off-by: Chao Yu <chao@kernel.org>
>> ---
>> v4:
>> - remove unnecessary "_require_command fsck.f2fs"
>> - clean up _fixed_by_git_commit line
>> - fix to clean all tmp files in _cleanup
>>  tests/f2fs/009     | 147 +++++++++++++++++++++++++++++++++++++++++++++
>>  tests/f2fs/009.out |   2 +
>>  2 files changed, 149 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..9120d8a5
>> --- /dev/null
>> +++ b/tests/f2fs/009
>> @@ -0,0 +1,147 @@
>> +#! /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.*
>> +}
>> +
>> +for ((i=0;i<14;i++)) do
>> +	echo "round: " $i >> $seqres.full
>> +
>> +	_scratch_mkfs >> $seqres.full
>> +	_scratch_mount
>> +
>> +	if [ $i == 0 ]; then
>> +		touch $filename
>> +		ino=`stat -c '%i' $filename`
>> +		nlink=0
>> +	elif [ $i == 1 ]; then
> .....
> 
> Ok, it works, but it's a bit nasty. You want to run the same
> injection and checking on all types of inodes, so factor that out
> like so:
> 
> inject_and_check()
> {
> 	local nlink=$1
> 	local ino=`stat -c '%i' $filename`
> 
> 	echo "ino:"$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
> }
> 
> And now most of the test cases become this:
> 
> _scratch_mkfs >> $seqres.full
> _scratch_mount
> 
> touch $filename
> inject_and_check 0
> 
> mkdir $filename
> inject_and_check 1
> 
> mknod $filename c 9 0
> inject_and_check 0
> 
> mknod $filename b 8 0
> inject_and_check 0
> 
> .....
> 
> The whacky cases with socket and orphan inodes can be handled
> by factoring inject_and_check so there's a second function that
> takes both ino and nlink as parameters.
> 
> This gets rid of all the unnecessary if/elif logic and looping, 
> leaving only the test code that does the work behind.

Thanks a lot for the suggestion, it will be more clean w/ above
implementation, will update v5.

Thanks,

> 
> -Dave.