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From: Al Viro <viro@zeniv.linux.org.uk>
To: "Pali Rohár" <pali.rohar@gmail.com>
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	"Theodore Y. Ts'o" <tytso@mit.edu>,
	OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>,
	Namjae Jeon <linkinjeon@gmail.com>,
	Gabriel Krisman Bertazi <krisman@collabora.com>
Subject: Re: vfat: Broken case-insensitive support for UTF-8
Date: Mon, 20 Jan 2020 00:09:31 +0000	[thread overview]
Message-ID: <20200120000931.GX8904@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20200119233348.es5m63kapdvyesal@pali>

On Mon, Jan 20, 2020 at 12:33:48AM +0100, Pali Rohár wrote:

> > Does the behaviour match how Windows handles that thing?
> 
> Linux behavior does not match Windows behavior.
> 
> On Windows is FAT32 (fastfat.sys) case insensitive and file names "č"
> and "Č" are treated as same file. Windows does not allow you to create
> both files. It says that file already exists.

So how is the mapping specified in their implementation?  That's
obviously the mapping we have to match.

> > That's the only reason to support that garbage at all...
> 
> What do you mean by garbage?

Case-insensitive anything... the only reason to have that crap at all
is that native implementations are basically forcing it as fs
image correctness issue.  It's worthless on its own merits, but
we can't do something that amounts to corrupting fs image when
we access it for write.

  reply	other threads:[~2020-01-20  0:09 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-19 22:14 vfat: Broken case-insensitive support for UTF-8 Pali Rohár
2020-01-19 23:08 ` Al Viro
2020-01-19 23:33   ` Pali Rohár
2020-01-20  0:09     ` Al Viro [this message]
2020-01-20 11:19       ` Pali Rohár
2020-01-20  4:04 ` OGAWA Hirofumi
2020-01-20  7:30   ` Al Viro
2020-01-20  7:45     ` Al Viro
2020-01-20  8:07       ` oopsably broken case-insensitive support in ext4 and f2fs (Re: vfat: Broken case-insensitive support for UTF-8) Al Viro
2020-01-20 19:35         ` Al Viro
2020-01-24  4:29           ` Eric Biggers
2020-01-24 17:47             ` Linus Torvalds
2020-01-24 18:03               ` Jaegeuk Kim
2020-01-24 18:45                 ` Eric Biggers
2020-01-20 11:04   ` vfat: Broken case-insensitive support for UTF-8 Pali Rohár
2020-01-20 12:07     ` OGAWA Hirofumi
2020-01-20 21:40       ` Pali Rohár
2020-01-20 22:46         ` Al Viro
2020-01-20 23:57           ` Pali Rohár
2020-01-21  0:07             ` Al Viro
2020-01-21 20:34               ` Pali Rohár
2020-01-21 21:36                 ` Al Viro
2020-01-21 22:14                   ` Al Viro
2020-01-21 22:46                     ` Pali Rohár
2020-01-26 23:08                 ` Pali Rohár
2020-01-21 12:43             ` David Laight
2020-01-22  0:25         ` Gabriel Krisman Bertazi
2020-01-20 15:07     ` David Laight
2020-01-20 15:20       ` Pali Rohár
2020-01-20 15:47         ` David Laight
2020-01-20 16:12           ` Al Viro
2020-01-20 16:51             ` David Laight
2020-01-20 16:27           ` Pali Rohár
2020-01-20 16:43             ` David Laight
2020-01-20 16:56               ` Pali Rohár
2020-01-20 17:37       ` Theodore Y. Ts'o
2020-01-20 17:32   ` Theodore Y. Ts'o
2020-01-20 17:56     ` Pali Rohár
2020-01-21  3:52     ` OGAWA Hirofumi
2020-01-21 11:00       ` Pali Rohár
2020-01-21 12:26         ` OGAWA Hirofumi

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