linux-kernel - Re: [PATCH v9 4/4] ext4: Use generic casefolding support

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Message-ID: <877dvxggsl.fsf@collabora.com>
Date:   Wed, 24 Jun 2020 01:43:22 -0400
From:   Gabriel Krisman Bertazi <krisman@...labora.com>
To:     Daniel Rosenberg <drosen@...gle.com>
Cc:     "Theodore Ts'o" <tytso@....edu>, linux-ext4@...r.kernel.org,
        Jaegeuk Kim <jaegeuk@...nel.org>, Chao Yu <chao@...nel.org>,
        linux-f2fs-devel@...ts.sourceforge.net,
        Eric Biggers <ebiggers@...nel.org>,
        linux-fscrypt@...r.kernel.org,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Richard Weinberger <richard@....at>,
        linux-mtd@...ts.infradead.org,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        kernel-team@...roid.com
Subject: Re: [PATCH v9 4/4] ext4: Use generic casefolding support

Daniel Rosenberg <drosen@...gle.com> writes:

> -
>  const struct dentry_operations ext4_dentry_ops = {
> -	.d_hash = ext4_d_hash,
> -	.d_compare = ext4_d_compare,
> +	.d_hash = generic_ci_d_hash,
> +	.d_compare = generic_ci_d_compare,
>  };
>  #endif

Can you make the structure generic since it is the same for f2fs and
ext4, which let you drop the code guards?  Unless that becomes a problem for
d_revalidate with fscrypt, it is fine like this.

>  #ifdef CONFIG_UNICODE
> -	sbi = EXT4_SB(sb);
> -	if (ext4_has_strict_mode(sbi) && IS_CASEFOLDED(dir) &&
> -	    sbi->s_encoding && utf8_validate(sbi->s_encoding, &dentry->d_name))
> +	if (sb_has_enc_strict_mode(sb) && IS_CASEFOLDED(dir) &&

I keep reading the 'enc' in sb_has_enc_strict_mode() as 'encryption'.  What do
you think about renaming it to sb_has_strict_encoding()?

These comments apply equally to patches 3 and 4.  Other than that,

Reviewed-by: Gabriel Krisman Bertazi <krisman@...labora.com>

-- 
Gabriel Krisman Bertazi