linux-ext4 - Re: [PATCH v5 16/16] f2fs: add fs-verity support

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Message-ID: <20190626182138.GA30296@gmail.com>
Date:   Wed, 26 Jun 2019 11:21:39 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     Chao Yu <yuchao0@...wei.com>
Cc:     linux-fscrypt@...r.kernel.org, linux-ext4@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org, linux-api@...r.kernel.org,
        linux-integrity@...r.kernel.org, Jaegeuk Kim <jaegeuk@...nel.org>,
        "Theodore Y . Ts'o" <tytso@....edu>,
        Victor Hsieh <victorhsieh@...gle.com>,
        Chandan Rajendra <chandan@...ux.vnet.ibm.com>,
        Dave Chinner <david@...morbit.com>,
        Christoph Hellwig <hch@....de>,
        "Darrick J . Wong" <darrick.wong@...cle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH v5 16/16] f2fs: add fs-verity support

On Wed, Jun 26, 2019 at 03:34:35PM +0800, Chao Yu wrote:
> >>> +	err = f2fs_convert_inline_inode(inode);
> >>> +	if (err)
> >>> +		return err;
> >>> +
> >>> +	err = dquot_initialize(inode);
> >>> +	if (err)
> >>> +		return err;
> >>
> >> We can get rid of dquot_initialize() here, since f2fs_file_open() ->
> >> dquot_file_open() should has initialized quota entry previously, right?
> > 
> > We still need it because dquot_file_open() only calls dquot_initialize() if the
> > file is being opened for writing.  But here the file descriptor is readonly.
> > I'll add a comment explaining this here and in the ext4 equivalent.
> 
> Ah, you're right.
> 
> f2fs_convert_inline_inode() may grab one more block during conversion, so we
> need to call dquot_initialize() before inline conversion?
> 
> Thanks,
> 

Good point.  I'll fix that here and in ext4.

- Eric