From: David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Subject: Re: [RFC][PATCH 06/10] cifs: define inode-level cache object and register them
Date: Sat, 26 Jun 2010 00:04:28 +0100
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To: Jeff Layton <jlayton-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org>
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Jeff Layton <jlayton-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org> wrote:

> IIUC, updating mtime for a write is also an attribute change, and that
> affects ctime. According to the stat(2) manpage:

You're right.  Okay, ctime is the more frequently changed.

> > Note that Ext4 appears to have a file creation time field in its inode
> > (struct ext4_inode::i_crtime[_extra]).  Can Samba be made to use that?
> 
> Is it exposed to userspace in any (standard) way? It would be handy to
> have that. While we're wishing...it might also be nice to have a
> standard way to get at the i_generation from userspace too.

Not at present, but it's something that could be exported by ioctl() or
getxattr().

David