From: Christoph Hellwig <hch@infradead.org>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Christoph Hellwig <hch@infradead.org>,
linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Eric Biederman <ebiederm@xmission.com>
Subject: Re: [PATCH 00/11] [RFC] repair net namespace damage to rpc_pipefs
Date: Mon, 2 Dec 2013 00:12:33 -0800 [thread overview]
Message-ID: <20131202081233.GA6953@infradead.org> (raw)
In-Reply-To: <20131201181329.GC10323@ZenIV.linux.org.uk>
On Sun, Dec 01, 2013 at 06:13:29PM +0000, Al Viro wrote:
> Making the series no-go in that form, obviously.
Looking at the mess it made I'd almost be tempted to say a little leak
for a less used features is better than lots of pain for everyone..
Looking at the mess it made I'm really upset.
> > Given that the namespace kraken has infected various internal filesystem
> > and will get more soon I suspect this problem is or will become generic
> > and will need a proper solution anyway. Al, any good ideas how to deal
> > with this? Most straight forward way would be to add a counter of
> > user vfsmount to the superblock and methods when it goes to 1 and 0,
> > but that seems a bit ugly.
>
> Folks, please, _please_, let's formulate the lifecycle rules first; we
> already had way too much trouble from putting mechanism first only to
> run into questions like the above ("what happens if somebody tries to
> allocate a PID in pid_ns that is already scheduled for shutdown?").
> Remember the (recurring) fun with kobject-related lifetime issues?
> Or rpc_pipefs notifier ugliness, for that matter...
I'll have to let the net namespace folks chime in for that, as far as
I'm concerned it's a featured better config'ed off. If they can't come
up with anything better the procfs hack above would be it.
next prev parent reply other threads:[~2013-12-02 8:12 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-01 13:14 [PATCH 00/11] [RFC] repair net namespace damage to rpc_pipefs Christoph Hellwig
2013-12-01 13:14 ` [PATCH 01/11] sunrpc: allocate pipefs inodes using kmalloc Christoph Hellwig
2013-12-01 14:26 ` Jeff Layton
2013-12-01 13:14 ` [PATCH 02/11] rpc_pipefs: always mount on net namespace initialization Christoph Hellwig
2013-12-01 15:24 ` Jeff Layton
2013-12-01 13:14 ` [PATCH 03/11] sunrpc: remove the rpc_clients_block notifier Christoph Hellwig
2013-12-01 15:25 ` Jeff Layton
2013-12-01 13:14 ` [PATCH 04/11] sunrpc: no need to have a lock or superblock for rpc_unlink Christoph Hellwig
2013-12-01 13:14 ` [PATCH 05/11] sunprc: add sensible pipe creation and removal helpers Christoph Hellwig
2013-12-01 13:14 ` [PATCH 06/11] sunrpc: clean up rpc_pipefs client dir creation Christoph Hellwig
2013-12-01 13:14 ` [PATCH 07/11] sunrpc: make rpc_mkdir_populate net-namespace aware Christoph Hellwig
2013-12-01 13:14 ` [PATCH 08/11] sunrpc: rpc_get_sb_net, die, die, die Christoph Hellwig
2013-12-01 13:14 ` [PATCH 09/11] nfs: convert idmapper to rpc_mkpipe_clnt Christoph Hellwig
2013-12-01 13:14 ` [PATCH 10/11] auth_gss: convert " Christoph Hellwig
2013-12-01 13:14 ` [PATCH 11/11] sunrpc: rpc_pipefs cleanup Christoph Hellwig
2013-12-01 14:36 ` [PATCH 00/11] [RFC] repair net namespace damage to rpc_pipefs Jeff Layton
2013-12-01 15:44 ` Jeff Layton
2013-12-01 15:57 ` Jeff Layton
2013-12-01 18:13 ` Al Viro
2013-12-02 8:12 ` Christoph Hellwig [this message]
2013-12-02 13:44 ` Trond Myklebust
2013-12-02 14:24 ` Stanislav Kinsbursky
2013-12-02 15:36 ` Christoph Hellwig
2013-12-02 15:58 ` Trond Myklebust
2013-12-03 7:24 ` Stanislav Kinsbursky
2013-12-02 15:34 ` Christoph Hellwig
2013-12-02 16:00 ` Trond Myklebust
2013-12-02 16:27 ` Christoph Hellwig
2013-12-02 16:46 ` Trond Myklebust
2013-12-02 16:33 ` Jeff Layton
2013-12-02 16:37 ` J. Bruce Fields
2013-12-02 16:45 ` Jeff Layton
2013-12-02 15:57 ` Al Viro
2013-12-02 16:04 ` Trond Myklebust
2013-12-03 2:11 ` [RFC] alloc_pid() breakage Al Viro
2013-12-02 7:23 ` [PATCH 00/11] [RFC] repair net namespace damage to rpc_pipefs Stanislav Kinsbursky
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