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

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Message-ID: <871wjlp2l0.fsf@duaron.myhome.or.jp>
Date:	Tue, 20 Mar 2007 02:26:03 +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:

> But, anyway, this is a separate issue that my patch doesn't attempt to 
> correct. The conclusion so far is that we disagree, and that there are 
> situations where using utf8 iocharset is the least of all evils, so the 
> warning is not justified enough. Reproducible testcase:

Again, I don't care about read at all. And why don't you use "utf8"
option, instead of "iocharset=utf8". "iocharset=utf8" is warned until
it is fixed. The "utf8" also doesn't work correctly in some case though.

>> I'm talking about two filesystems on a system here, not two encoding
>> on one filesystem.
>
> I am also talking about this. Mounting two filesystems with different 
> iocharsets is insane, because this will result in one of the following outcomes:
>
> 1) "ls" will show wrong characters in filenames on one of the filesystems
> 2) one of the two filesystems will contain wrong on-disk data for filenames, 
> that, when misinterpreted by mounting with wrong iocharset, results in 
> seemingly-correct output, but is misunderstood by the properly set up 
> reference implementation (that's what is likely to happen with jfs in your 
> example).

Because you didn't change the locale. And it is your policy, right?
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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