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[100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id CFE4D40206; Thu, 15 Jan 2026 18:29:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 52629C19422; Thu, 15 Jan 2026 18:29:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768501788; bh=YJUwpUc45Oiig1PgeO+sGSqGRRsfBtkg12WLTtqgjM0=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=oD4BqoeHcY2D9lGD7DZ3JkRCa0etBfHfBKe+2G2b7u7Qo+C41AyXcw62I2rIzw78K JhB9l/0/J6ilYAa69I8b7fww8XZFEqOir5lBIE2UdSkmpRVv/hXFxiOU+LtDAjFXR6 BNE6R8L6dKY0UtY62cDEp8T1NZC6IK+QrzBnhVQPbtXSZ2RbkhJJ5Xlh6Q8pw3shuL 6BvYBuNu4w1u+CtSec6A7GYdzxcGnBdiKl2POm27xEPFdCmzt6sqGM5XBC0tQhtIJ6 65IfjuFS7GtCyIgOWgwaid7bZE2IFVOd9iIpDkcd3LlTfzzNh/Mb4MwPEBNMh7gQ2D Zad5rVsjaOezQ== Message-ID: <9c99197dde2eafa55a1b55dce2f0d4d02c77340a.camel@kernel.org> Subject: Re: [PATCH 00/29] fs: require filesystems to explicitly opt-in to nfsd export support From: Jeff Layton To: Amir Goldstein Cc: Christian Brauner , Alexander Viro , Chuck Lever , NeilBrown , 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 , Christoph Hellwig , 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, samba-technical@lists.samba.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 Date: Thu, 15 Jan 2026 13:29:41 -0500 In-Reply-To: References: <20260115-exportfs-nfsd-v1-0-8e80160e3c0c@kernel.org> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV T2h6v8i8YqsATFPwO4nuiTmL6I40ZofxVd+9wdRI4Db8yUNA4ZSP2nqLcLtFjClYRBoJvRWvsv4lm 0OX6MYPtv76hka8lW4mnRmZqqx3UtfHX/hF/zH24Gj7A6sYKYLCU3YrI2Ogiu7/ksKcl7goQjpvtV 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 fhzY7EUl CyVLXga77K8iu1e58NgzBSk7FWI0xnq4zepJYiWdZBig3J7wxakTcRpTnnn3dR8e5GEeh+fxY05OfSZl88wbm0ykKzTDDvPjwYnfZd+DOBycGVJIUGA0cIVPuAKCFwmv3aHLU1whv7czUbeNGY7DCv/p96bR7toJAtnrWtYYihetjro9ghClPPHoFw5fWL+nyPzvio6ovNRtAVeyGl2AnjPbG6QrHsplatQ85l5Mso1H0Rx3k2b4+RYHPklgGQA0vkWBUjeTAuw5JbWx9YecPNDmLn6g5gSMf8PKqX/sIUZzK75brda0HmO/Euw+Cly150Ubp X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, 2026-01-15 at 19:17 +0100, Amir Goldstein wrote: > On Thu, Jan 15, 2026 at 6:48=E2=80=AFPM Jeff Layton = wrote: > >=20 > > In recent years, a number of filesystems that can't present stable > > filehandles have grown struct export_operations. They've mostly done > > this for local use-cases (enabling open_by_handle_at() and the like). > > Unfortunately, having export_operations is generally sufficient to make > > a filesystem be considered exportable via nfsd, but that requires that > > the server present stable filehandles. >=20 > Where does the term "stable file handles" come from? and what does it mea= n? > Why not "persistent handles", which is described in NFS and SMB specs? >=20 > Not to mention that EXPORT_OP_PERSISTENT_HANDLES was Acked > by both Christoph and Christian: >=20 > https://lore.kernel.org/linux-fsdevel/20260115-rundgang-leihgabe-12018e93= c00c@brauner/ >=20 > Am I missing anything? >=20 This was Chuck's suggested name. His point was that STABLE means that the FH's don't change during the lifetime of the file. I don't much care about the flag name, so if everyone likes PERSISTENT better I'll roll with that. Also, on the ovl patch: will fix... Thanks for the review! --=20 Jeff Layton