Re: [PATCH v5 6/6] f2fs/009: detect and repair nlink corruption

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On Wed, Mar 26, 2025 at 10:20:30AM +1100, Dave Chinner wrote:
> On Tue, Mar 25, 2025 at 08:58:24PM +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@xxxxxxxxxx>
> > Signed-off-by: Chao Yu <chao@xxxxxxxxxx>
> > ---
> > 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
> 
> Perhaps something like:
> 
> _require_command $(type -P socket) socket

Good point! Maybe double quotation marks -- "$(type -P socket)" is
helpful, due to if socket isn't installed, there will be only one
argument.

> 
> would be more consistent with all the other code that checks for
> installed utilities that a test requires?
> 
> > +_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()
> 
> Single leading "_" is reserved for fstests functions, not for local
> test functions.
> 
> Just call this one "inject_and_test", because that is what it does,
> and call this one:
> 
> > +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
> > +}
> 
> something like check_links()
> 
> Otherwise this is a good improvement.

Hi Chao, if you agree with all these changes, and don't need to change more, I can
help to merge this patchset with above changes. Or you'd like to send a new version?

Thanks,
Zorro

> 
> -Dave.
> -- 
> Dave Chinner
> david@xxxxxxxxxxxxx
> 





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