From: Christoph Hellwig <hch@infradead.org>
To: Jeff Layton <jlayton@kernel.org>
Cc: Christian Brauner <brauner@kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
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Subject: Re: [PATCH v2 01/31] Documentation: document EXPORT_OP_NOLOCKS
Date: Mon, 19 Jan 2026 23:44:23 -0800 [thread overview]
Message-ID: <aW8yV6v8ZDiynOUm@infradead.org> (raw)
In-Reply-To: <20260119-exportfs-nfsd-v2-1-d93368f903bd@kernel.org>
On Mon, Jan 19, 2026 at 11:26:18AM -0500, Jeff Layton wrote:
> + 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.
I'm not sure this is very useful. It really needs to document what
locking semantics nfs expects, because otherwise no reader will know
if they set this or not.
next prev parent reply other threads:[~2026-01-20 7:44 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-19 16:26 [PATCH v2 00/31] fs: require filesystems to explicitly opt-in to nfsd export support Jeff Layton
2026-01-19 16:26 ` [PATCH v2 01/31] Documentation: document EXPORT_OP_NOLOCKS Jeff Layton
2026-01-20 7:44 ` Christoph Hellwig [this message]
2026-01-20 13:20 ` Jeff Layton
2026-01-20 14:12 ` Jeff Layton
2026-01-20 14:35 ` Jeff Layton
2026-01-21 9:17 ` Christoph Hellwig
2026-01-21 9:58 ` NeilBrown
2026-01-21 12:29 ` Jeff Layton
2026-01-21 22:47 ` NeilBrown
2026-01-19 16:26 ` [PATCH v2 02/31] exportfs: add new EXPORT_OP_STABLE_HANDLES flag Jeff Layton
2026-01-19 16:41 ` Amir Goldstein
2026-01-20 7:50 ` Christoph Hellwig
2026-01-20 8:40 ` Jan Kara
2026-01-21 9:17 ` Christoph Hellwig
2026-01-20 13:21 ` Jeff Layton
2026-01-19 16:26 ` [PATCH v2 03/31] tmpfs: add EXPORT_OP_STABLE_HANDLES flag to export operations Jeff Layton
2026-01-19 16:26 ` [PATCH v2 04/31] ext4: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 05/31] ext2: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 06/31] erofs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 07/31] efs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 08/31] xfs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 09/31] ceph: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 10/31] btrfs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 11/31] befs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 12/31] ufs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 13/31] udf: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 14/31] affs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 15/31] squashfs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 16/31] smb/client: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 17/31] ovl: " Jeff Layton
2026-01-19 16:42 ` Amir Goldstein
2026-01-19 16:26 ` [PATCH v2 18/31] orangefs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 19/31] ocfs2: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 20/31] ntfs3: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 21/31] nilfs2: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 22/31] nfs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 23/31] jfs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 24/31] jffs2: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 25/31] isofs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 26/31] gfs2: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 27/31] fuse: " Jeff Layton
2026-01-19 16:43 ` Amir Goldstein
2026-01-19 16:26 ` [PATCH v2 28/31] fat: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 29/31] f2fs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 30/31] nfsd: only allow filesystems that set EXPORT_OP_STABLE_HANDLES Jeff Layton
2026-01-19 16:51 ` Chuck Lever
2026-01-19 16:26 ` [PATCH v2 31/31] nfsd: convert dprintks in check_export() to tracepoints Jeff Layton
2026-01-19 16:47 ` Chuck Lever
2026-01-20 13:42 ` Jeff Layton
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