linux-kernel - Re: CONFIG_VFAT_FS

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Message-ID: <alpine.LSU.2.00.0907211236380.14924@fbirervta.pbzchgretzou.qr>
Date:	Tue, 21 Jul 2009 12:44:22 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...ozas.de>
To:	Boaz Harrosh <bharrosh@...asas.com>
cc:	tridge@...ba.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Martin Steigerwald <Martin@...htvoll.de>,
	Theodore Tso <tytso@....edu>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Pavel Machek <pavel@....cz>, john.lanza@...ux.com,
	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
	linux-fsdevel@...r.kernel.org,
	Dave Kleikamp <shaggy@...ux.vnet.ibm.com>, corbet@....net,
	jcm@...masters.org, torvalds@...ux-foundation.org
Subject: Re: CONFIG_VFAT_FS_DUALNAMES regressions


On Tuesday 2009-07-21 11:16, Boaz Harrosh wrote:
>>   - Similarly, there is a small chance that chkdsk on Windows will
>>     rename one file in a directory if they happen to have the same 11
>>     byte dummy values. The probability of this happening is
>>     approximately 80x lower than with the previous patch.
>
>What if we had a user mode utility that does these short-names
>renames that a user can optionally run after umount? since it
>only writes the (random) short-names it's also safe.

Mm, user-mode. tridgefat could trigger a usermode process at open(2)
time to rebuild the short name with traditional semantics to counter
the 'breakage' induced by random 8.3 names.
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