From: Jens Axboe <axboe@kernel.dk>
To: Jeff Layton <jlayton@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jann Horn <jannh@google.com>
Cc: Miklos Szeredi <miklos@szeredi.hu>, Karel Zak <kzak@redhat.com>,
David Howells <dhowells@redhat.com>, Ian Kent <raven@themaw.net>,
Christian Brauner <christian.brauner@ubuntu.com>,
James Bottomley <James.Bottomley@hansenpartnership.com>,
Steven Whitehouse <swhiteho@redhat.com>,
Miklos Szeredi <mszeredi@redhat.com>,
viro <viro@zeniv.linux.org.uk>,
Christian Brauner <christian@brauner.io>,
"Darrick J. Wong" <darrick.wong@oracle.com>,
Linux API <linux-api@vger.kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 00/17] VFS: Filesystem information and notifications [ver #17]
Date: Tue, 3 Mar 2020 12:23:16 -0700 [thread overview]
Message-ID: <dc84aa00-e570-8833-cf9f-d1001c52dd7a@kernel.dk> (raw)
In-Reply-To: <dbb06c63c17c23fcacdd99e8b2266804ee39ffe5.camel@kernel.org>
On 3/3/20 12:02 PM, Jeff Layton wrote:
> Basically, all you'd need to do is keep a pointer to struct file in the
> internal state for the chain. Then, allow userland to specify some magic
> fd value for subsequent chained operations that says to use that instead
> of consulting the fdtable. Maybe use -4096 (-MAX_ERRNO - 1)?
BTW, I think we need two magics here. One that says "result from
previous is fd for next", and one that says "fd from previous is fd for
next". The former allows inheritance from open -> read, the latter from
read -> write.
--
Jens Axboe
next prev parent reply other threads:[~2020-03-03 19:23 UTC|newest]
Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-21 18:01 [PATCH 00/17] VFS: Filesystem information and notifications [ver #17] David Howells
2020-02-21 18:01 ` [PATCH 01/17] watch_queue: Add security hooks to rule on setting mount and sb watches " David Howells
2020-02-21 18:02 ` [PATCH 02/17] watch_queue: Implement mount topology and attribute change notifications " David Howells
2020-02-21 18:02 ` [PATCH 03/17] watch_queue: sample: Display mount tree " David Howells
2020-02-21 18:02 ` [PATCH 04/17] watch_queue: Introduce a non-repeating system-unique superblock ID " David Howells
2020-02-21 18:02 ` [PATCH 05/17] watch_queue: Add superblock notifications " David Howells
2020-02-21 18:02 ` [PATCH 06/17] watch_queue: sample: Display " David Howells
2020-02-21 18:02 ` [PATCH 07/17] fsinfo: Add fsinfo() syscall to query filesystem information " David Howells
2020-02-26 2:29 ` Aleksa Sarai
2020-02-28 14:44 ` David Howells
2020-02-21 18:02 ` [PATCH 08/17] fsinfo: Provide a bitmap of supported features " David Howells
2020-02-21 18:03 ` [PATCH 09/17] fsinfo: Allow fsinfo() to look up a mount object by ID " David Howells
2020-02-21 18:03 ` [PATCH 10/17] fsinfo: Allow mount information to be queried " David Howells
2020-03-04 14:58 ` Miklos Szeredi
2020-03-04 16:10 ` Miklos Szeredi
2020-02-21 18:03 ` [PATCH 11/17] fsinfo: sample: Mount listing program " David Howells
2020-02-21 18:03 ` [PATCH 12/17] fsinfo: Allow the mount topology propogation flags to be retrieved " David Howells
2020-02-21 18:03 ` [PATCH 13/17] fsinfo: Query superblock unique ID and notification counter " David Howells
2020-02-21 18:03 ` [PATCH 14/17] fsinfo: Add API documentation " David Howells
2020-02-21 18:03 ` [PATCH 15/17] fsinfo: Add support for AFS " David Howells
2020-02-21 18:03 ` [PATCH 16/17] fsinfo: Add example support for Ext4 " David Howells
2020-02-21 18:04 ` [PATCH 17/17] fsinfo: Add example support for NFS " David Howells
2020-02-21 20:21 ` [PATCH 00/17] VFS: Filesystem information and notifications " James Bottomley
2020-02-24 10:24 ` Miklos Szeredi
2020-02-24 14:55 ` James Bottomley
2020-02-24 15:28 ` Miklos Szeredi
2020-02-25 12:13 ` Steven Whitehouse
2020-02-25 15:28 ` James Bottomley
2020-02-25 15:47 ` Steven Whitehouse
2020-02-26 9:11 ` Miklos Szeredi
2020-02-26 10:51 ` Steven Whitehouse
2020-02-27 5:06 ` Ian Kent
2020-02-27 9:36 ` Miklos Szeredi
2020-02-27 11:34 ` Ian Kent
2020-02-27 13:45 ` Miklos Szeredi
2020-02-27 15:14 ` Karel Zak
2020-02-28 0:43 ` Ian Kent
2020-02-28 8:35 ` Miklos Szeredi
2020-02-28 12:27 ` Greg Kroah-Hartman
2020-02-28 16:24 ` Miklos Szeredi
2020-02-28 17:15 ` Al Viro
2020-03-02 8:43 ` Miklos Szeredi
2020-03-02 10:34 ` Karel Zak
2020-02-28 16:42 ` David Howells
2020-02-28 15:08 ` James Bottomley
2020-02-28 15:40 ` Miklos Szeredi
2020-02-28 0:12 ` Ian Kent
2020-02-28 15:52 ` Christian Brauner
2020-02-28 16:36 ` David Howells
2020-03-02 9:09 ` Miklos Szeredi
2020-03-02 9:38 ` Greg Kroah-Hartman
2020-03-03 5:27 ` Ian Kent
2020-03-03 7:46 ` Miklos Szeredi
2020-03-06 16:25 ` Miklos Szeredi
2020-03-06 19:43 ` Al Viro
2020-03-06 19:54 ` Miklos Szeredi
2020-03-06 19:58 ` Al Viro
2020-03-06 20:05 ` Al Viro
2020-03-06 20:11 ` Miklos Szeredi
2020-03-06 20:37 ` Al Viro
2020-03-06 20:38 ` Al Viro
2020-03-06 20:45 ` Al Viro
2020-03-06 20:49 ` Al Viro
2020-03-06 20:51 ` Miklos Szeredi
2020-03-06 21:28 ` Al Viro
2020-03-06 20:56 ` Al Viro
2020-03-06 20:51 ` Miklos Szeredi
2020-03-07 9:48 ` Greg Kroah-Hartman
2020-03-07 20:48 ` Miklos Szeredi
2020-03-03 9:12 ` David Howells
2020-03-03 9:26 ` Miklos Szeredi
2020-03-03 9:48 ` Miklos Szeredi
2020-03-03 10:21 ` Steven Whitehouse
2020-03-03 10:32 ` Miklos Szeredi
2020-03-03 11:09 ` Ian Kent
2020-03-03 10:00 ` Christian Brauner
2020-03-03 10:13 ` Miklos Szeredi
2020-03-03 10:25 ` Christian Brauner
2020-03-03 11:33 ` Miklos Szeredi
2020-03-03 11:56 ` Christian Brauner
2020-03-03 11:38 ` Karel Zak
2020-03-03 13:03 ` Greg Kroah-Hartman
2020-03-03 13:14 ` Greg Kroah-Hartman
2020-03-03 13:34 ` Miklos Szeredi
2020-03-03 13:43 ` Greg Kroah-Hartman
2020-03-03 14:10 ` Greg Kroah-Hartman
2020-03-03 14:13 ` Jann Horn
2020-03-03 14:24 ` Greg Kroah-Hartman
2020-03-03 15:44 ` Jens Axboe
2020-03-03 16:37 ` Greg Kroah-Hartman
2020-03-03 16:51 ` Jeff Layton
2020-03-03 16:55 ` Jens Axboe
2020-03-03 19:02 ` Jeff Layton
2020-03-03 19:07 ` Jens Axboe
2020-03-03 19:23 ` Jens Axboe [this message]
2020-03-03 19:43 ` Jeff Layton
2020-03-03 20:33 ` Jens Axboe
2020-03-03 21:03 ` Jeff Layton
2020-03-03 21:20 ` Jens Axboe
2020-03-03 14:10 ` Miklos Szeredi
2020-03-03 14:29 ` Greg Kroah-Hartman
2020-03-03 14:40 ` Jann Horn
2020-03-03 16:51 ` Greg Kroah-Hartman
2020-03-03 16:57 ` Jann Horn
2020-03-03 20:15 ` Greg Kroah-Hartman
2020-03-03 14:40 ` David Howells
2020-03-04 4:20 ` Ian Kent
2020-03-03 14:19 ` David Howells
2020-03-03 16:59 ` Greg Kroah-Hartman
2020-03-03 14:23 ` Christian Brauner
2020-03-03 15:23 ` Greg Kroah-Hartman
2020-03-03 15:53 ` David Howells
2020-03-04 2:01 ` Ian Kent
2020-03-04 15:22 ` Karel Zak
2020-03-04 16:49 ` Greg Kroah-Hartman
2020-03-04 17:55 ` Karel Zak
2020-03-03 14:09 ` David Howells
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