From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7DFD4D2D11F for ; Tue, 13 Jan 2026 14:54:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=BBeKXomHJBdf2wEdU+SEDwoulv1gUQ/3MDsGkMDeVhs=; b=aHEv2DfODEyGce U7tcCzPuJFfcI1HAYL3rNQCmM8s18Y3vgJ7JchIjvdlblPQdUzpmcXamcTChLJdz4nG8jF7GsrgqN 1Pg8BrCr6YH68adP6AAw5UnUJICbkij2bk8tBeis9y8Kl3qJLDdTNFA8Dwkfpo/7VW+Op15U8XLsc e8qOpoaCB6PnvOByJOlHC+F0L3Gg5Hxyltj3UYFXM0L6jNURG2qcyR3f7YPxWbHYWJsmphJSwwM0D EJUE9MW31zs1RJcNWEJ0TJgPihEt2jcyS1R7fczrse/3F8uVaHx1wRmbJTrSsIROIW308ch5hjU68 OoMdsKlrlRWFF1LTZjXA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vffn4-00000007IZE-188v; Tue, 13 Jan 2026 14:54:38 +0000 Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vffmt-00000007IYZ-1cGp; Tue, 13 Jan 2026 14:54:27 +0000 Date: Tue, 13 Jan 2026 06:54:27 -0800 From: Christoph Hellwig To: Christian Brauner Cc: Jeff Layton , Amir Goldstein , Chuck Lever , Jan Kara , Luis de Bethencourt , Salah Triki , Nicolas Pitre , Christoph Hellwig , Anders Larsen , Alexander Viro , David Sterba , Chris Mason , Gao Xiang , Chao Yu , Yue Hu , Jeffle Xu , Sandeep Dhavale , Hongbo Li , Chunhai Guo , Jan Kara , Theodore Ts'o , Andreas Dilger , Jaegeuk Kim , OGAWA Hirofumi , David Woodhouse , Richard Weinberger , Dave Kleikamp , Ryusuke Konishi , Viacheslav Dubeyko , Konstantin Komarov , Mark Fasheh , Joel Becker , Joseph Qi , Mike Marshall , Martin Brandenburg , Miklos Szeredi , Phillip Lougher , Carlos Maiolino , Hugh Dickins , Baolin Wang , Andrew Morton , Namjae Jeon , Sungjong Seo , Yuezhang Mo , Alexander Aring , Andreas Gruenbacher , Jonathan Corbet , "Matthew Wilcox (Oracle)" , Eric Van Hensbergen , Latchesar Ionkov , Dominique Martinet , Christian Schoenebeck , Xiubo Li , Ilya Dryomov , Trond Myklebust , Anna Schumaker , Steve French , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Tom Talpey , Bharath SM , Hans de Goede , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mtd@lists.infradead.org, jfs-discussion@lists.sourceforge.net, linux-nilfs@vger.kernel.org, ntfs3@lists.linux.dev, ocfs2-devel@lists.linux.dev, devel@lists.orangefs.org, linux-unionfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-mm@kvack.org, gfs2@lists.linux.dev, linux-doc@vger.kernel.org, v9fs@lists.linux.dev, ceph-devel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org Subject: Re: [PATCH 00/24] vfs: require filesystems to explicitly opt-in to lease support Message-ID: References: <20260108-setlease-6-20-v1-0-ea4dec9b67fa@kernel.org> <8af369636c32b868f83669c49aea708ca3b894ac.camel@kernel.org> <20260113-mondlicht-raven-82fc4eb70e9d@brauner> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260113-mondlicht-raven-82fc4eb70e9d@brauner> X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org On Tue, Jan 13, 2026 at 09:54:15AM +0100, Christian Brauner wrote: > I don't think we want to expose cgroupfs via NFS that's super weird. > It's like remote partial resource management and it would be very > strange if a remote process suddenly would be able to move things around > in the cgroup tree. So I would prefer to not do this. > > So my preference would be to really sever file handles from the export > mechanism so that we can allow stuff like pidfs and nsfs and cgroupfs to > use file handles via name_to_handle_at() and open_by_handle_at() without > making them exportable. I don't understand this discussion. If someone really wants to expose say cgroupfs to the network they'll find a way, be that using a userspace nfs server, samba, 9p or a custom fuse thing. What's the benefit of explicitly prohibiting a knfsd export? (not that I think any of this makes much sense to start with) ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/