From: "Chuck Lever" <cel@kernel.org>
To: "Amir Goldstein" <amir73il@gmail.com>,
"Jeff Layton" <jlayton@kernel.org>
Cc: "Christoph Hellwig" <hch@infradead.org>,
"Christian Brauner" <brauner@kernel.org>,
"Chuck Lever" <chuck.lever@oracle.com>, "Jan Kara" <jack@suse.cz>,
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Subject: Re: [PATCH 00/24] vfs: require filesystems to explicitly opt-in to lease support
Date: Wed, 14 Jan 2026 09:52:34 -0500 [thread overview]
Message-ID: <5a1730f3-30ff-403c-a460-09a81f9616c5@app.fastmail.com> (raw)
In-Reply-To: <CAOQ4uxhDwR7dteLaqURX+9CooGM1hA7PL6KnVmSwX11ZdKxZTA@mail.gmail.com>
On Wed, Jan 14, 2026, at 9:14 AM, Amir Goldstein wrote:
> On Wed, Jan 14, 2026 at 2:41 PM Jeff Layton <jlayton@kernel.org> wrote:
> Very well then.
> How about EXPORT_OP_PERSISTENT_HANDLES?
>
> This terminology is from the NFS protocol spec and it is also used
> to describe the same trait in SMB protocol.
>
>> The problem there is that we very much do want to keep tmpfs
>> exportable, but it doesn't have stable handles (per-se).
>
> Thinking out loud -
> It would be misguided to declare tmpfs as
> EXPORT_OP_PERSISTENT_HANDLES
> and regressing exports of tmpfs will surely not go unnoticed.
>
> How about adding an exportfs option "persistent_handles",
> use it as default IFF neither options fsid=, uuid= are used,
> so that at least when exporting tmpfs, exportfs -v will show
> "no_persistent_handles" explicitly?
I think we need to be careful. tmpfs filehandles align quite
well with the traditional definition of persistent filehandles.
tmpfs filehandles live as long as tmpfs files do, and that is
all that is required to be considered "persistent".
--
Chuck Lever
next prev parent reply other threads:[~2026-01-14 14:53 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-08 17:12 Jeff Layton
2026-01-08 17:12 ` [PATCH 01/24] fs: add setlease to generic_ro_fops and read-only filesystem directory operations Jeff Layton
2026-01-08 17:26 ` Jan Kara
2026-01-08 17:12 ` [PATCH 02/24] affs: add setlease file operation Jeff Layton
2026-01-08 21:26 ` David Sterba
2026-01-08 17:12 ` [PATCH 03/24] btrfs: " Jeff Layton
2026-01-08 21:26 ` David Sterba
2026-01-08 17:12 ` [PATCH 04/24] erofs: " Jeff Layton
2026-01-10 1:47 ` Chao Yu
2026-01-08 17:13 ` [PATCH 05/24] ext2: " Jeff Layton
2026-01-08 17:28 ` Jan Kara
2026-01-08 17:13 ` [PATCH 06/24] ext4: " Jeff Layton
2026-01-08 17:28 ` Jan Kara
2026-01-08 17:13 ` [PATCH 07/24] exfat: " Jeff Layton
2026-01-08 22:47 ` Namjae Jeon
2026-01-08 17:13 ` [PATCH 08/24] f2fs: " Jeff Layton
2026-01-10 1:47 ` Chao Yu
2026-01-08 17:13 ` [PATCH 09/24] fat: " Jeff Layton
2026-01-08 18:12 ` OGAWA Hirofumi
2026-01-08 17:13 ` [PATCH 10/24] gfs2: add a " Jeff Layton
2026-01-08 17:13 ` [PATCH 11/24] jffs2: add " Jeff Layton
2026-01-09 8:49 ` Richard Weinberger
2026-01-08 17:13 ` [PATCH 12/24] jfs: " Jeff Layton
2026-01-08 19:46 ` Dave Kleikamp
2026-01-09 7:40 ` Richard Weinberger
2026-01-09 8:48 ` Richard Weinberger
2026-01-08 17:13 ` [PATCH 13/24] nilfs2: " Jeff Layton
2026-01-09 5:26 ` Ryusuke Konishi
2026-01-08 17:13 ` [PATCH 14/24] ntfs3: " Jeff Layton
2026-01-08 17:13 ` [PATCH 15/24] ocfs2: " Jeff Layton
2026-01-08 17:29 ` Jan Kara
2026-01-08 17:13 ` [PATCH 16/24] orangefs: " Jeff Layton
2026-01-08 17:13 ` [PATCH 17/24] overlayfs: " Jeff Layton
2026-01-08 17:13 ` [PATCH 18/24] squashfs: " Jeff Layton
2026-01-08 17:13 ` [PATCH 19/24] tmpfs: " Jeff Layton
2026-01-08 17:31 ` Jan Kara
2026-01-08 17:13 ` [PATCH 20/24] udf: " Jeff Layton
2026-01-08 17:29 ` Jan Kara
2026-01-08 17:13 ` [PATCH 21/24] ufs: " Jeff Layton
2026-01-08 17:13 ` [PATCH 22/24] xfs: " Jeff Layton
2026-01-08 17:13 ` [PATCH 23/24] filelock: default to returning -EINVAL when ->setlease operation is NULL Jeff Layton
2026-01-08 17:34 ` Jan Kara
2026-01-08 17:13 ` [PATCH 24/24] fs: remove simple_nosetlease() Jeff Layton
2026-01-08 17:34 ` Jan Kara
2026-01-08 17:40 ` [PATCH 00/24] vfs: require filesystems to explicitly opt-in to lease support Jan Kara
2026-01-08 18:56 ` Jeff Layton
2026-01-09 9:26 ` Jan Kara
2026-01-09 18:52 ` Amir Goldstein
2026-01-12 9:49 ` Christian Brauner
2026-01-12 13:34 ` Jeff Layton
2026-01-12 14:31 ` Chuck Lever
2026-01-12 14:50 ` Jeff Layton
2026-01-13 8:54 ` Christian Brauner
2026-01-13 11:03 ` Amir Goldstein
2026-01-13 11:45 ` Jeff Layton
2026-01-13 14:03 ` Chuck Lever
2026-01-13 14:27 ` Jeff Layton
2026-01-13 14:31 ` Chuck Lever
2026-01-13 15:00 ` Jeff Layton
2026-01-13 14:54 ` Christoph Hellwig
2026-01-13 17:06 ` Jeff Layton
2026-01-14 6:28 ` Christoph Hellwig
2026-01-14 9:34 ` Amir Goldstein
2026-01-14 13:06 ` Christoph Hellwig
2026-01-14 13:41 ` Jeff Layton
2026-01-14 14:14 ` Amir Goldstein
2026-01-14 14:52 ` Chuck Lever [this message]
2026-01-14 15:05 ` Christoph Hellwig
2026-01-14 15:26 ` Christian Brauner
2026-01-14 15:20 ` Christian Brauner
2026-01-14 13:39 ` David Laight
2026-01-09 6:00 ` Christoph Hellwig
2026-01-09 8:03 ` Al Viro
2026-01-12 9:56 ` Christian Brauner
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