linux-ext4 - Re: [PATCH 2/9] f2fs: remove f2fs_dir

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Date:   Tue, 1 Dec 2020 15:00:06 -0800
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-mtd@...ts.infradead.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 2/9] f2fs: remove f2fs_dir_open()

On Thu, Nov 26, 2020 at 03:04:55PM +0800, Chao Yu wrote:
> On 2020/11/25 8:23, Eric Biggers wrote:
> > From: Eric Biggers <ebiggers@...gle.com>
> > 
> > Since encrypted directories can be opened without their encryption key
> > being available, and each readdir tries to set up the key, trying to set
> 
> readdir -> readdir/lookup?

Yes, ->lookup() tries to set up the key too.  It's different because ->lookup()
doesn't require that the directory be open.  But I suppose that's another reason
why setting up the directory's key in ->open() isn't useful.

I'll add something about that.

- Eric

> 
> > up the key in ->open() too isn't really useful.
> > 
> > Just remove it so that directories don't need an ->open() method
> > anymore, and so that we eliminate a use of fscrypt_get_encryption_info()
> > (which I'd like to stop exporting to filesystems).
> > 
> > Signed-off-by: Eric Biggers <ebiggers@...gle.com>
> 
> Reviewed-by: Chao Yu <yuchao0@...wei.com>
> 
> Thanks,