linux-kernel - Re: [PATCH] fat: Refactor shortname parsing

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Message-ID: <87fw9anuwk.fsf@devron.myhome.or.jp>
Date:	Mon, 02 Jul 2012 22:40:27 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	"Steven J. Magnani" <steve@...idescorp.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fat: Refactor shortname parsing

"Steven J. Magnani" <steve@...idescorp.com> writes:

> On Sat, 2012-06-30 at 05:09 +0900, OGAWA Hirofumi wrote: 
>> OGAWA Hirofumi <hirofumi@...l.parknet.co.jp> writes:
>> 
>> >
>> > 			if (is_vfat)
>> > 				ptname[i++] = fat_tolower(!nocase, c);
>> 
>> Of course, if (!is_vfat). Sorry.
>
> I agree that the nocase logic is confusing, but I'm pretty sure this
> change would break the code. 

I might be wrong here though, which place is broken with it?

> 'nocase' is always zero for vfat, which does not recognize that option.
> For msdos, it is zero by default, and 1 if the 'nocase' option was
> specified.
> In all cases it is necessary to copy *something* to ptname.

Looks like, we overwrite bufname by converted bufuname in is_vfat case?

	if (isvfat) {
		bufuname[j] = 0x0000;
		i = fat_uni_to_x8(sb, bufuname, bufname, sizeof(bufname));
	}

Thanks.
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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