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 76A0CC44500 for ; Thu, 22 Jan 2026 06:37:22 +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=KdQetc6MpAKItFVNwvkBQP/q7byH74u6pYe25yrYBJY=; b=ZRizYNitmmP61m GVHF0/HDCUgv3Kw9j2n1eCsRnuGn7wNbWrs3CQ1esYegBfAULLnta+3Jo8kCYZ7+McGJkv+oMybnC riO1S0AZ+1mboQ+k1jqIqScRpBh3Pp4U8VeAbpHrbYRauIKsJpVg52mcNYqZBmAnIsHCXrPYrnzlm gshrRunK91SEoQSNWcg74p4BXMcAsi1iyMsJVPELHY0wUE9jsvciXT4SVQ7+WcQhuAs9E0v7f4Izy sTlVFbZ6MMiMOgPr5RXU0VavxmxW4HTxBGRcqrh7NL7s1cxzRsUE12AkxNLyc4O+C1aJO6KNhTRpf Gc67fWEFtjtTeZfOkTYA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vioJf-00000006VUn-47St; Thu, 22 Jan 2026 06:37:15 +0000 Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vioJY-00000006VUJ-2qSm; Thu, 22 Jan 2026 06:37:08 +0000 Date: Wed, 21 Jan 2026 22:37:08 -0800 From: Christoph Hellwig To: Jeff Layton Cc: Christoph Hellwig , NeilBrown , Christian Brauner , 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: <176880736225.16766.4203157325432990313@noble.neil.brown.name> <20260119-kanufahren-meerjungfrau-775048806544@brauner> <176885553525.16766.291581709413217562@noble.neil.brown.name> <176890126683.16766.5241619788613840985@noble.neil.brown.name> <176899164457.16766.16099772451425825775@noble.neil.brown.name> <364d2fd98af52a2e2c32ca286decbdc1fe1c80d3.camel@kernel.org> <3210d04fa2c0b1f4312d10506cac30586cb49a3c.camel@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <3210d04fa2c0b1f4312d10506cac30586cb49a3c.camel@kernel.org> 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 Wed, Jan 21, 2026 at 10:18:00AM -0500, Jeff Layton wrote: > > fat seems to be an exception as far as the 'real' file systems go. > > And it did sound to me like some of the synthetic ones had similar > > issues. > > > > Not sure what we can do about FAT without changing the filehandle > format in some fashion. The export ops just use > generic_encode_ino32_fh, and FAT doesn't have stable inode numbers. > The "nostale" ops seem sane enough but it looks like they only work > with the fs in r/o mode. Yeah. I guess we need to ignore this because of > > I think Amirs patch would take care of that. Although userland nfs > > servers or other storage applications using the handle syscalls would > > still see them. Then again fixing the problem that some handles > > did not fulfill the long standing (but not documented well enough) > > semantics probably is a good fix on it's own. > > Agreed. We should try to ensure uniqueness and persistence in all > filehandles both for nfsd and userland applications. Sounds good to me. ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/