linux-kernel - Re: [PATCH 5/5] fs/ntfs3: Refactoring lock in ntfs_init

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Date:   Wed, 22 Sep 2021 21:41:12 +0300
From:   Kari Argillander <kari.argillander@...il.com>
To:     Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Cc:     ntfs3@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 5/5] fs/ntfs3: Refactoring lock in ntfs_init_acl

On Wed, Sep 22, 2021 at 07:20:49PM +0300, Konstantin Komarov wrote:
> This is possible because of moving lock into ntfs_create_inode.
> 
> Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>

Looks good.

Reviewed-by: Kari Argillander <kari.argillander@...il.com>

> ---
>  fs/ntfs3/xattr.c | 55 ++++++++++++------------------------------------
>  1 file changed, 14 insertions(+), 41 deletions(-)
> 
> diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c
> index 59ec5e61a239..83bbee277e12 100644
> --- a/fs/ntfs3/xattr.c
> +++ b/fs/ntfs3/xattr.c
> @@ -693,54 +693,27 @@ int ntfs_init_acl(struct user_namespace *mnt_userns, struct inode *inode,
>  	struct posix_acl *default_acl, *acl;
>  	int err;
>  
> -	/*
> -	 * TODO: Refactoring lock.
> -	 * ni_lock(dir) ... -> posix_acl_create(dir,...) -> ntfs_get_acl -> ni_lock(dir)
> -	 */
> -	inode->i_default_acl = NULL;
> -
> -	default_acl = ntfs_get_acl_ex(mnt_userns, dir, ACL_TYPE_DEFAULT, 1);
> -
> -	if (!default_acl || default_acl == ERR_PTR(-EOPNOTSUPP)) {
> -		inode->i_mode &= ~current_umask();
> -		err = 0;
> -		goto out;
> -	}
> -
> -	if (IS_ERR(default_acl)) {
> -		err = PTR_ERR(default_acl);
> -		goto out;
> -	}
> -
> -	acl = default_acl;
> -	err = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
> -	if (err < 0)
> -		goto out1;
> -	if (!err) {
> -		posix_acl_release(acl);
> -		acl = NULL;
> -	}
> -
> -	if (!S_ISDIR(inode->i_mode)) {
> -		posix_acl_release(default_acl);
> -		default_acl = NULL;
> -	}
> +	err = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
> +	if (err)
> +		return err;
>  
> -	if (default_acl)
> +	if (default_acl) {
>  		err = ntfs_set_acl_ex(mnt_userns, inode, default_acl,
>  				      ACL_TYPE_DEFAULT, 1);
> +		posix_acl_release(default_acl);
> +	} else {
> +		inode->i_default_acl = NULL;
> +	}
>  
>  	if (!acl)
>  		inode->i_acl = NULL;
> -	else if (!err)
> -		err = ntfs_set_acl_ex(mnt_userns, inode, acl, ACL_TYPE_ACCESS,
> -				      1);
> -
> -	posix_acl_release(acl);
> -out1:
> -	posix_acl_release(default_acl);
> +	else {
> +		if (!err)
> +			err = ntfs_set_acl_ex(mnt_userns, inode, acl,
> +					      ACL_TYPE_ACCESS, 1);
> +		posix_acl_release(acl);
> +	}
>  
> -out:
>  	return err;
>  }
>  #endif
> -- 
> 2.33.0
> 
> 
>