linux-kernel - Re: [PATCH take 3][RFC] fat: Save FAT root directory timestamps to volume label

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Message-ID: <20090908153949.GD5579@shareable.org>
Date:	Tue, 8 Sep 2009 16:39:49 +0100
From:	Jamie Lokier <jamie@...reable.org>
To:	Jorg Schummer <ext-jorg.2.schummer@...ia.com>
Cc:	hirofumi@...l.parknet.co.jp, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH take 3][RFC] fat: Save FAT root directory timestamps to volume label

Jorg Schummer wrote:
> Standard FAT implementations cannot store any of the FAT root directory's
> timestamps. This commit adds the mount option 'rootts', which allows saving
> the FAT root directory timestamps as the timestamps of the FAT volume label
> directory entry. At least Mac OS X is known to support the same mechanism
> and interoperate with this commit.
> 
> When mounting, the following values can be specified for the 'rootts' mount
> option:
> 
>   "rootts=ignore"   ignores root directory timestamps. All timestamps are
>                     reset to 0 (1/1/1970). This has been the FAT behaviour
>                     prior to this patch.
> 
>   "rootts=preserve" tries to load and save the root directory's timestamps
>                     if a volume label entry exists. The mtime and atime are
>                     corrected based on root directory entries' ctime. This
>                     is the default.
> 
>   "rootts=save"     tries to load and save the root directory's timestamps.
>                     The mtime and atime are corrected based on root
>                     directory entries' ctime. If the root directory was
>                     accessed but no volume label entry exists, the label
>                     "NO NAME" is created.

Does Mac OS X do the same "NO NAME" thing?

-- Jamie
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