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b=EZByvzF31znoQEmDHc3SC4xaf0M/35g4xjcVwooMk1FV61HXxLESS5MiLKX6tWFeo Hv85bBuLMqHqez3qHBscy+CtxbnArxV4QeHTrTHLdSh1NMKPN6CGz094DCBrAFgM+D AjJf/kL6odSToXoYbC0BwY2wXW9BcS3BGnPOFuFUygBqW+EJJ8lAxaO4a8DC3mSQ8J aALSFez2K6qCZWewncoJbLr2GlmdBWTKm66qurJ4sNUMMc6kZedy35j6ubnv3HJVKy Bvebe3CcZHZIgOiFzpF4s1XQUiXn7842k1apwk6XDZswZtqbHhYTTAxje/WAZfxElR uszu+UWz9bfRg== From: Jeff Layton Date: Mon, 19 Jan 2026 11:26:18 -0500 Subject: [PATCH v2 01/31] Documentation: document EXPORT_OP_NOLOCKS MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260119-exportfs-nfsd-v2-1-d93368f903bd@kernel.org> References: <20260119-exportfs-nfsd-v2-0-d93368f903bd@kernel.org> In-Reply-To: <20260119-exportfs-nfsd-v2-0-d93368f903bd@kernel.org> To: Christian Brauner , Alexander Viro , Chuck Lever , NeilBrown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Amir Goldstein , 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 , Jonathan Corbet Cc: David Laight , Dave Chinner , 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, linux-doc@vger.kernel.org, Jeff Layton X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; 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Document it properly. Signed-off-by: Jeff Layton --- Documentation/filesystems/nfs/exporting.rst | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/filesystems/nfs/exporting.rst b/Documentation/filesystems/nfs/exporting.rst index de64d2d002a204c5460980c898d4ec41fd43d47a..0583a0516b1e3a3e6a10af95ff88506cf02f7df4 100644 --- a/Documentation/filesystems/nfs/exporting.rst +++ b/Documentation/filesystems/nfs/exporting.rst @@ -238,3 +238,9 @@ following flags are defined: all of an inode's dirty data on last close. Exports that behave this way should set EXPORT_OP_FLUSH_ON_CLOSE so that NFSD knows to skip waiting for writeback when closing such files. + + EXPORT_OP_NOLOCKS - Disable file locking on this filesystem. Some + filesystems cannot properly support file locking as implemented by + nfsd. A case in point is reexport of NFS itself, which can't be done + safely without coordinating the grace period handling. Other clustered + and networked filesystems can be problematic here as well. -- 2.52.0