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From:   David Howells <dhowells@redhat.com>
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To:     Miklos Szeredi <miklos@szeredi.hu>
Cc:     dhowells@redhat.com, "Eric W. Biederman" <ebiederm@xmission.com>,
        Al Viro <viro@zeniv.linux.org.uk>,
        Linux API <linux-api@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 28/33] vfs: syscall: Add fsconfig() for configuring and managing a context [ver #11]
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Date:   Sat, 11 Aug 2018 21:20:08 +0100
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Miklos Szeredi <miklos@szeredi.hu> wrote:

> You can determine at fsopen() time whether the filesystem is able to
> support the O_EXCL behavior?  If so, then it's trivial to enable this
> conditionally.  I think that's what Eric is asking for, it's obviously
> not fair to ask for a change in behavior of the legacy interface.

It's not trivial, see btrfs and nfs :-/

David