linux-kernel - Re: [RFC] xfs: fake fallocate success for always CoW inodes

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Message-ID: <lhuframz0f9.fsf@oldenburg.str.redhat.com>
Date: Mon, 10 Nov 2025 10:44:58 +0100
From: Florian Weimer <fweimer@...hat.com>
To: Christoph Hellwig <hch@....de>
Cc: Dave Chinner <david@...morbit.com>,  Matthew Wilcox
 <willy@...radead.org>,  Hans Holmberg <hans.holmberg@....com>,
  linux-xfs@...r.kernel.org,  Carlos Maiolino <cem@...nel.org>,  "Darrick J
 . Wong" <djwong@...nel.org>,  linux-fsdevel@...r.kernel.org,
  linux-kernel@...r.kernel.org,  libc-alpha@...rceware.org
Subject: Re: [RFC] xfs: fake fallocate success for always CoW inodes

* Christoph Hellwig:

> I think what Florian wants (although I might be misunderstanding him)
> is an interface that will increase the file size up to the passed in
> size, but never reduce it and lose data.

Exaclty.  Thank you for the succinct summary.

Florian