Message-ID: <d73e7de5056a34578a193185770e46584450d8b7.camel@kernel.org>
Date:   Tue, 29 Aug 2023 20:48:48 -0400
From:   Jeff Layton <jlayton@...nel.org>
To:     Al Viro <viro@...iv.linux.org.uk>
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Subject: Re: [PATCH v2 08/92] fs: new helper: simple_rename_timestamp

On Wed, 2023-08-30 at 01:19 +0100, Al Viro wrote:
> On Wed, Jul 05, 2023 at 02:58:11PM -0400, Jeff Layton wrote:
> 
> > + * POSIX mandates that the old and new parent directories have their ctime and
> > + * mtime updated, and that inodes of @old_dentry and @new_dentry (if any), have
> > + * their ctime updated.
> 
> APPLICATION USAGE
> Some implementations mark for update the last file status change timestamp
> of renamed files and some do not. Applications which make use of the
> last file status change timestamp may behave differently with respect
> to renamed files unless they are designed to allow for either behavior.
>
> So for children POSIX permits rather than mandates.  Doesn't really matter;
> Linux behaviour had been to touch ctime on children since way back, if
> not since the very beginning.

Mea culpa. You're quite correct. I'll plan to roll a small patch to
update the comment over this function.

Thanks!
-- 
Jeff Layton <jlayton@...nel.org>

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