linux-kernel - Re: [PATCH v5 2/4] fs: unicode: Rename function names from utf8 to unicode

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Date:   Tue, 30 Mar 2021 15:19:37 +0530
From:   Shreeya Patel <shreeya.patel@...labora.com>
To:     Eric Biggers <ebiggers@...nel.org>
Cc:     tytso@....edu, adilger.kernel@...ger.ca, jaegeuk@...nel.org,
        chao@...nel.org, krisman@...labora.com, drosen@...gle.com,
        yuchao0@...wei.com, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org, kernel@...labora.com,
        andre.almeida@...labora.com
Subject: Re: [PATCH v5 2/4] fs: unicode: Rename function names from utf8 to
 unicode


On 30/03/21 7:23 am, Eric Biggers wrote:
> On Tue, Mar 30, 2021 at 02:12:38AM +0530, Shreeya Patel wrote:
>> utf8data.h_shipped has a large database table which is an auto-generated
>> decodification trie for the unicode normalization functions and it is not
>> necessary to carry this large table in the kernel.
>> Goal is to make UTF-8 encoding loadable by converting it into a module
>> and adding a unicode subsystem layer between the filesystems and the
>> utf8 module.
>> This layer will load the module whenever any filesystem that
>> needs unicode is mounted.
>> utf8-core will be converted into this layer file in the future patches,
>> hence rename the function names from utf8 to unicode which will denote the
>> functions as the unicode subsystem layer functions and this will also be
>> the first step towards the transformation of utf8-core file into the
>> unicode subsystem layer file.
>>
>> Signed-off-by: Shreeya Patel <shreeya.patel@...labora.com>
>> ---
>> Changes in v5
>>    - Improve the commit message.
> This didn't really answer my questions about the reason for this renaming.
> Aren't the functions like unicode_casefold() still tied to UTF-8 (as opposed to
> e.g. supporting both UTF-8 and UTF-16)?  Is that something you're trying to
> change?


Currently, layer's functions are still tied to UTF-8 encoding only. But 
in future if we will have UTF-16 support then layer file would have to 
be changed accordingly to support both.
Unicode subsystem layer is a generic layer which connects the 
filesystems and UTF8 module ( and/or UTF16 in future )


>
> - Eric
>