linux-ext4 - Re: [PATCH 1/9] ext4: remove ext4_dir

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Date:   Wed, 2 Dec 2020 15:47:34 -0700
From:   Andreas Dilger <adilger@...ger.ca>
To:     Eric Biggers <ebiggers@...nel.org>
Cc:     linux-fscrypt@...r.kernel.org,
        Ext4 Developers List <linux-ext4@...r.kernel.org>,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-mtd@...ts.infradead.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 1/9] ext4: remove ext4_dir_open()

On Nov 24, 2020, at 5:23 PM, Eric Biggers <ebiggers@...nel.org> 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
> 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: Andreas Dilger <adilger@...ger.ca>

> ---
> fs/ext4/dir.c | 8 --------
> 1 file changed, 8 deletions(-)
> 
> diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
> index ca50c90adc4c..16bfbdd5007c 100644
> --- a/fs/ext4/dir.c
> +++ b/fs/ext4/dir.c
> @@ -616,13 +616,6 @@ static int ext4_dx_readdir(struct file *file, struct dir_context *ctx)
> 	return 0;
> }
> 
> -static int ext4_dir_open(struct inode * inode, struct file * filp)
> -{
> -	if (IS_ENCRYPTED(inode))
> -		return fscrypt_get_encryption_info(inode) ? -EACCES : 0;
> -	return 0;
> -}
> -
> static int ext4_release_dir(struct inode *inode, struct file *filp)
> {
> 	if (filp->private_data)
> @@ -664,7 +657,6 @@ const struct file_operations ext4_dir_operations = {
> 	.compat_ioctl	= ext4_compat_ioctl,
> #endif
> 	.fsync		= ext4_sync_file,
> -	.open		= ext4_dir_open,
> 	.release	= ext4_release_dir,
> };
> 
> --
> 2.29.2
> 


Cheers, Andreas






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