Re: [PATCH] ceph: fail the open_by_handle_at() if the dentry is being unlinked

From: Sebastian Hasler <sebastian.hasler@sec.uni-stuttgart.de>
To: Xiubo Li <xiubli@redhat.com>
Cc: ceph-devel@vger.kernel.org
Subject: Re: [PATCH] ceph: fail the open_by_handle_at() if the dentry is being unlinked
Date: Mon, 11 Sep 2023 12:07:38 +0200	[thread overview]
Message-ID: <a9b51955-0f27-d802-4716-988af03a25e9@sec.uni-stuttgart.de> (raw)
In-Reply-To: <53c5733b-8a94-66e3-4d05-97238d147d5b@redhat.com>

On 11/09/2023 05:21, Xiubo Li wrote:

> "This will generally not work if the file  has  a  link  count of 
> zero  (files  created  with  O_TMPFILE  and without O_EXCL are an 
> exception)."
In this sentence, "generally" probably means "typically", so it depends 
on the specific file system's behavior. I don't know the CephFS behavior 
in this case. However, at least files created with O_TMPFILE are an 
exception. Does CephFS support creating files with O_TMPFILE? Such files 
can (and often will) go from the unlinked and open state to the linked 
and closed state.

-- 
Sebastian Hasler, M.Sc.
Institute of Information Security - SEC
University of Stuttgart
Universitätsstraße 38
D-70569 Stuttgart
Germany
https://sec.uni-stuttgart.de
Phone: +49 (0) 711 685 88208