linux-kernel - Re: [PATCH] Sanitize filesystem NLS handling

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Date:	Mon, 19 Mar 2007 12:46:56 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	"Alexander E. Patrakov" <patrakov@....usu.ru>
Cc:	LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...l.org>,
	agalakhov@...lrs.uran.ru, Kay Sievers <kay.sievers@...y.org>
Subject: Re: [PATCH] Sanitize filesystem NLS handling

"Alexander E. Patrakov" <patrakov@....usu.ru> writes:

>> You allow to set any nls to codepage? If so, it is not good.
>
> I did this because it involved less changes. Only FAT treats codepage as a 
> number. All other filesystems already allow arbitrary NLS as a codepage 
> mount parameter.

I'm saying here, it is not good for vfat.

>> No, utf-8 makes completely wrong entry. It's more wrong than other nls.
>
> For any non-UTF-8 based locales, the other NLS is correct and utf8 indeed 
> would produce completely wrong characters. But for UTF-8 based locales, utf8 
> is the only correct iocharset.

No, iocharset=utf8 is wrong always.

>>>  * Makes CONFIG_NLS_DEFAULT and CONFIG_CODEPAGE_DEFAULT adjustable at 
>>> runtime via the following mechanisms:
>> 
>> The configurable sounds sane, and it may help some case. But, it should
>> not be system global. At least, I think the default would be per-filesystem,
>> otherwise some configs seems to be needed for other filesystem after all.
>
> OK, now I see that your primary objection is to merging options, and 
> disagree (incorrect locale setup on your side is suspected). For meaningful 
> discussion, I want to see the following:
>
> 1) Output of "locale -a"
> 2) Output of "yes --help" from the same terminal
> 3) The correct iocharset and codepage for mounting FAT filesystems on USB 
> flash drives that are known readable under Windows (here "correct" = "ls in 
> this terminal shows filenames correctly").
> 4) The same for SMB filesystems.

Ah, ok. I'm thinking one locale is not enough, at least for now.
Why I can't use utf8 for jfs or something, and use other nls for vfat?
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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