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Date: Thu, 9 Apr 2026 15:38:31 +0200
From: Christian Brauner <brauner@kernel.org>
To: Theodore Tso <tytso@mit.edu>
Cc: Sean Smith <defendthedisabled@gmail.com>, 
	linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-btrfs@vger.kernel.org, 
	dsterba@suse.com, david@fromorbit.com, osandov@osandov.com, 
	hirofumi@mail.parknet.co.jp, linkinjeon@kernel.org
Subject: Re: [RFC PATCH v1 0/6] provenance_time (ptime): a new settable
 timestamp for cross-filesystem provenance
Message-ID: <20260409-hinblick-anregen-b50f248bd7e4@brauner>
References: <20260405225442.GA1763@macsyma-wired.lan>
 <20260407000558.417-1-DefendTheDisabled@gmail.com>
 <20260407233618.GB12536@macsyma-wired.lan>
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In-Reply-To: <20260407233618.GB12536@macsyma-wired.lan>

On Tue, Apr 07, 2026 at 07:36:18PM -0400, Theodore Ts'o wrote:
> On Mon, Apr 06, 2026 at 07:05:55PM -0500, Sean Smith wrote:
> > The patches implement rename-over preservation in all 5
> > filesystem rename handlers. When rename(source, target)
> > replaces an existing file, and the source has ptime=0 (the
> > default for any newly-created temp file) while the target
> > has ptime != 0, the filesystem copies the target's ptime to
> > the source before destroying the target's inode. This runs
> > inside the rename transaction, atomic with the rename itself.
> 
> Yelch.   This is so *very* non-Unixy / non-POSIX / non-Linux.

I think you meant to type "N", "A", and "K".