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 E20FFC44501 for ; Wed, 21 Jan 2026 09:59:02 +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=V6benaZA3E20deht/2ry61/9Tfqu8ESFJ3tEBO5t+44=; b=Uey3t7wixd72zM DtVOg+zpfCBED6j655WvIFAGHXaUZgJdYMcGbwa2HkfirG3R3w3LE70N3erVQTdAzVoA8Qwibg7qa wbfPpa5At9sULof2bQhU0jxbenlQNip6OhnfiRf8olC8jjSS5IlKB71UqcIYZ5Aj3vy4JJWpJIh9n ABu6bV/t3ht5Xd2VW7H6Qq/AUUcLYbvD0PMVBlaU2x+0XuhS2msl/UwcJqOnIXtIObGxsTMLMmucI LUYguufVqzqtVmyOjlS9oFGrfczr7ewxgV95KET6ItTjzF1ZO/fhteS+MNQ0W/c1/xCXDvOsMT40f rEVxXb2i/DK8O37i0Gig==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1viUzN-00000005EEA-29Yy; Wed, 21 Jan 2026 09:59:01 +0000 Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1viUzJ-00000005EDM-2rax; Wed, 21 Jan 2026 09:58:57 +0000 Date: Wed, 21 Jan 2026 01:58:57 -0800 From: Christoph Hellwig To: Christian Brauner Cc: NeilBrown , Christoph Hellwig , Jeff Layton , Amir Goldstein , Alexander Viro , Chuck Lever , Olga Kornievskaia , Dai Ngo , Tom Talpey , Hugh Dickins , Baolin Wang , Andrew Morton , Theodore Ts'o , Andreas Dilger , Jan Kara , Gao Xiang , Chao Yu , Yue Hu , Jeffle Xu , Sandeep Dhavale , Hongbo Li , Chunhai Guo , Carlos Maiolino , Ilya Dryomov , Alex Markuze , Viacheslav Dubeyko , Chris Mason , David Sterba , Luis de Bethencourt , Salah Triki , Phillip Lougher , Steve French , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Bharath SM , Miklos Szeredi , Mike Marshall , Martin Brandenburg , Mark Fasheh , Joel Becker , Joseph Qi , Konstantin Komarov , Ryusuke Konishi , Trond Myklebust , Anna Schumaker , Dave Kleikamp , David Woodhouse , Richard Weinberger , Jan Kara , Andreas Gruenbacher , OGAWA Hirofumi , Jaegeuk Kim , linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-ext4@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-xfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-unionfs@vger.kernel.org, devel@lists.orangefs.org, ocfs2-devel@lists.linux.dev, ntfs3@lists.linux.dev, linux-nilfs@vger.kernel.org, jfs-discussion@lists.sourceforge.net, linux-mtd@lists.infradead.org, gfs2@lists.linux.dev, linux-f2fs-devel@lists.sourceforge.net Subject: Re: [PATCH 00/29] fs: require filesystems to explicitly opt-in to nfsd export support Message-ID: References: <9c99197dde2eafa55a1b55dce2f0d4d02c77340a.camel@kernel.org> <176877859306.16766.15009835437490907207@noble.neil.brown.name> <176880736225.16766.4203157325432990313@noble.neil.brown.name> <20260119-kanufahren-meerjungfrau-775048806544@brauner> <176885553525.16766.291581709413217562@noble.neil.brown.name> <20260120-entmilitarisieren-wanken-afd04b910897@brauner> <176890211061.16766.16354247063052030403@noble.neil.brown.name> <20260120-hacken-revision-88209121ac2c@brauner> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260120-hacken-revision-88209121ac2c@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 20, 2026 at 11:31:54AM +0100, Christian Brauner wrote: > It is very much fine for a filesystems to support file handles without > wanting to support exporting via NFS. That is especially true for > in-kernel pseudo filesystems. I'm still amazed at this statement. "Wanting to export" is not something for the file system to decide on in any kind of sane layering. The file systems exports features, and layers higher in the stack make use of it. We just need to be precise in describing In-kernel code will then we so nice to respect it. But for userspace even then all bets are off. ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/