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Message-Id: <E1GVYnq-00004v-00@intern.SerNet.DE>
Date: Thu, 5 Oct 2006 21:23:12 +0200
From: Björn JACKE <bjacke@...net.de>
To: Theodore Tso <tytso@....edu>
Cc: ext3-users@...hat.com, linux-ext4@...r.kernel.org
Subject: Re: creation time stamps for ext4 ?
On 2006-10-05 at 12:55 -0400 Theodore Tso sent off:
> > I've given this some thought for adding as part of the nsec timestamp
> > patch. That is more feasable if we move the nsec ctime into the main
> > inode to double as the version field.
>
> Shoehorning an extra creation time field into the inode is relatively
> easy, but it's also necessary to have system calls to get and set the
> creation time. The stat structure doesn't have room for the creation
> time, so that means a new version of the stat structure exported the
> kernel, and a new version of the stat structure exported by glibc.
>
> So there are VFS and glibc changes necessary to make this be useful.
> But that doesn't prevent us from reserving space in the inode and
> starting to fill it in with the creation time, although it may be
> quite a while before it will be easily available to user programs like
> Samba.
yes, probably. But it's a reasonable effort to start that at some
time. It's good if ext3 developers have it in mind already now.
Should I open a feature request at bugzilla.kernel.org for the needed
VFS changes?
Bjoern
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