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From: "Pali Rohár" <pali.rohar@gmail.com>
To: Al Viro <viro@zeniv.linux.org.uk>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>,
	linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	"Theodore Y. Ts'o" <tytso@mit.edu>,
	Namjae Jeon <linkinjeon@gmail.com>,
	Gabriel Krisman Bertazi <krisman@collabora.com>
Subject: Re: vfat: Broken case-insensitive support for UTF-8
Date: Tue, 21 Jan 2020 23:46:33 +0100	[thread overview]
Message-ID: <20200121224633.lxitgyx6bw47crri@pali> (raw)
In-Reply-To: <20200121221447.GD23230@ZenIV.linux.org.uk>

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On Tuesday 21 January 2020 22:14:47 Al Viro wrote:
> On Tue, Jan 21, 2020 at 09:36:25PM +0000, Al Viro wrote:
> > On Tue, Jan 21, 2020 at 09:34:05PM +0100, Pali Rohár wrote:
> > 
> > > This is a great idea to get FAT equivalence classes. Thank you!
> > > 
> > > Now I quickly tried it... and it failed. FAT has restriction for number
> > > of files in a directory, so I would have to do it in more clever way,
> > > e.g prepare N directories and then try to create/open file for each
> > > single-point string in every directory until it success or fail in every
> > > one.
> > 
> > IIRC, the limitation in root directory was much harder than in
> > subdirectories...  Not sure, though - it had been a long time since
> > I had to touch *FAT for any reasons...

IIRC limit for root directory entry was only in FAT12 and FAT16. But I
already used subdirectories. Also VFAT name occupies at least two
entries (shortname + VFAT).

> Interesting...  FWIW, Linux vfat happily creates 65536 files in root
> directory.  What are the native limits?

Interesting... When I tried to create a new file by Linux vfat in that
directory where Windows created 32794 files, Linux vfat returned error
"No space left on device" even FS has only 39% used space. Into upper
directory linux vfat can put new file without any problem.

-- 
Pali Rohár
pali.rohar@gmail.com

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  reply	other threads:[~2020-01-21 22:46 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
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 [this message]
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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