diff mbox series

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

Message ID 20250312072309.3989074-6-chao@kernel.org (mailing list archive)
State New
Headers show
Series [v4,1/6] common/config: remove redundant export variables | expand

Commit Message

Chao Yu March 12, 2025, 7:23 a.m. UTC 
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

Comments

Zorro Lang March 25, 2025, 1:07 a.m. UTC | #1 
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 >> $seqres.full 2>&1 || _fail "fsck can't fix corruption"
> +
> +	_scratch_mount
> +	_scratch_unmount
> +done
> +
> +echo "Silence is golden"
> +
> +status=0
> +exit
> diff --git a/tests/f2fs/009.out b/tests/f2fs/009.out
> new file mode 100644
> index 00000000..7e977155
> --- /dev/null
> +++ b/tests/f2fs/009.out
> @@ -0,0 +1,2 @@
> +QA output created by 009
> +Silence is golden
> -- 
> 2.48.1
>
Chao Yu March 25, 2025, 6:54 a.m. UTC | #2 
On 3/25/25 09:07, Zorro Lang wrote:
> On Wed, Mar 12, 2025 at 03:23:09PM +0800, Chao Yu wrote:
>> This is a regression test to check whether fsck can handle corrupted
>> nlinks correctly, it uses inject.f2fs to inject nlinks w/ wrong value,
>> and expects fsck.f2fs can detect such corruption and do the repair.
>>
>> Cc: Jaegeuk Kim <jaegeuk@kernel.org>
>> Signed-off-by: Chao Yu <chao@kernel.org>
>> ---
>> v4:
>> - remove unnecessary "_require_command fsck.f2fs"
>> - clean up _fixed_by_git_commit line
>> - fix to clean all tmp files in _cleanup
>>  tests/f2fs/009     | 147 +++++++++++++++++++++++++++++++++++++++++++++
>>  tests/f2fs/009.out |   2 +
>>  2 files changed, 149 insertions(+)
>>  create mode 100755 tests/f2fs/009
>>  create mode 100644 tests/f2fs/009.out
>>
>> diff --git a/tests/f2fs/009 b/tests/f2fs/009
>> new file mode 100755
>> index 00000000..9120d8a5
>> --- /dev/null
>> +++ b/tests/f2fs/009
>> @@ -0,0 +1,147 @@
>> +#! /bin/bash
>> +# SPDX-License-Identifier: GPL-2.0
>> +# Copyright (c) 2025 Chao Yu.  All Rights Reserved.
>> +#
>> +# FS QA Test No. f2fs/009
>> +#
>> +# This is a regression test to check whether fsck can handle corrupted
>> +# nlinks correctly, it uses inject.f2fs to inject nlinks w/ wrong value,
>> +# and expects fsck.f2fs can detect such corruption and do the repair.
>> +#
>> +. ./common/preamble
>> +_begin_fstest auto quick
>> +
>> +if [ ! -x "$(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 >> $seqres.full 2>&1 || _fail "fsck can't fix corruption"
>> +
>> +	_scratch_mount
>> +	_scratch_unmount
>> +done
>> +
>> +echo "Silence is golden"
>> +
>> +status=0
>> +exit
>> diff --git a/tests/f2fs/009.out b/tests/f2fs/009.out
>> new file mode 100644
>> index 00000000..7e977155
>> --- /dev/null
>> +++ b/tests/f2fs/009.out
>> @@ -0,0 +1,2 @@
>> +QA output created by 009
>> +Silence is golden
>> -- 
>> 2.48.1
>>
>
Dave Chinner March 25, 2025, 9:15 a.m. UTC | #3 
On Wed, Mar 12, 2025 at 03:23:09PM +0800, Chao Yu wrote:
> This is a regression test to check whether fsck can handle corrupted
> nlinks correctly, it uses inject.f2fs to inject nlinks w/ wrong value,
> and expects fsck.f2fs can detect such corruption and do the repair.
> 
> Cc: Jaegeuk Kim <jaegeuk@kernel.org>
> Signed-off-by: Chao Yu <chao@kernel.org>
> ---
> v4:
> - remove unnecessary "_require_command fsck.f2fs"
> - clean up _fixed_by_git_commit line
> - fix to clean all tmp files in _cleanup
>  tests/f2fs/009     | 147 +++++++++++++++++++++++++++++++++++++++++++++
>  tests/f2fs/009.out |   2 +
>  2 files changed, 149 insertions(+)
>  create mode 100755 tests/f2fs/009
>  create mode 100644 tests/f2fs/009.out
> 
> diff --git a/tests/f2fs/009 b/tests/f2fs/009
> new file mode 100755
> index 00000000..9120d8a5
> --- /dev/null
> +++ b/tests/f2fs/009
> @@ -0,0 +1,147 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2025 Chao Yu.  All Rights Reserved.
> +#
> +# FS QA Test No. f2fs/009
> +#
> +# This is a regression test to check whether fsck can handle corrupted
> +# nlinks correctly, it uses inject.f2fs to inject nlinks w/ wrong value,
> +# and expects fsck.f2fs can detect such corruption and do the repair.
> +#
> +. ./common/preamble
> +_begin_fstest auto quick
> +
> +if [ ! -x "$(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.
Chao Yu March 25, 2025, 12:55 p.m. UTC | #4 
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.
diff mbox series

Patch

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