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From: "W. Trevor King" <wking@tremily.us>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: "Serge E. Hallyn" <serge@hallyn.com>,
	"Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>,
	Linux API <linux-api@vger.kernel.org>,
	Containers <containers@lists.linux-foundation.org>,
	lkml <linux-kernel@vger.kernel.org>,
	Andy Lutomirski <luto@amacapital.net>,
	criu@openvz.org, "Eric W. Biederman" <ebiederm@xmission.com>
Subject: Re: Introspecting userns relationships to other namespaces?
Date: Fri, 8 Jul 2016 20:15:28 -0700	[thread overview]
Message-ID: <20160709031528.GA25507@odin.tremily.us> (raw)
In-Reply-To: <1467903712.2347.16.camel@HansenPartnership.com>

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On Thu, Jul 07, 2016 at 08:01:52AM -0700, James Bottomley wrote:
> In theory, we could get nsfs to show this information as an option
> (just add a show_options entry to the superblock ops), but the
> problem is that although each namespace has a parent user_ns,
> there's no way to get it without digging in the namespace specific
> structure.  Probably we should restructure to move it into
> ns_common, then we could display it (and enforce all namespaces
> having owning user_ns) but it would be a reasonably large (but
> mechanical) change.

It sounds like everyone is either positive or or neutral on this
groundwork, even if we haven't decided if/how to expose the
information to userspace.  I'm happy to work up a patch while the rest
of the discussion continues.  I'm also happy to let someone else work
up the patch, if anyone else is chomping at the bit ;).

Cheers,
Trevor

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  parent reply	other threads:[~2016-07-09  3:15 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <c2a26220-69f2-f2f5-491a-e43abd9a6f92@gmail.com>
     [not found] ` <87r3b7pxja.fsf@x220.int.ebiederm.org>
2016-07-06  8:41   ` Introspecting userns relationships to other namespaces? Michael Kerrisk (man-pages)
2016-07-06 14:13     ` Serge E. Hallyn
2016-07-06 15:46       ` Eric W. Biederman
2016-07-08  1:57         ` [CRIU] " Andrew Vagin
2016-07-08  7:44           ` Eric W. Biederman
2016-07-08 14:35             ` James Bottomley
2016-07-08 20:38               ` Andrew Vagin
2016-07-08 20:50                 ` W. Trevor King
2016-07-08 22:19                 ` James Bottomley
2016-07-08 22:19                 ` James Bottomley
2016-07-08 23:52                   ` Eric W. Biederman
2016-07-09  0:15                     ` James Bottomley
2016-07-09  3:05                       ` Eric W. Biederman
2016-07-09  7:26                         ` Andrew Vagin
2016-07-09 10:31                           ` James Bottomley
2016-07-09 10:32                           ` James Bottomley
2016-07-09 18:15                           ` Eric W. Biederman
2016-07-09 18:29                             ` Eric W. Biederman
2016-07-13  0:08                               ` Andrew Vagin
2016-07-13  3:59                                 ` W. Trevor King
2016-07-07  8:15       ` Michael Kerrisk (man-pages)
2016-07-07 13:36         ` Serge E. Hallyn
2016-07-07 15:01           ` James Bottomley
2016-07-07 18:21             ` Michael Kerrisk (man-pages)
2016-07-07 18:24               ` Serge E. Hallyn
2016-07-07 19:17               ` James Bottomley
2016-07-08  2:16                 ` [CRIU] " Andrew Vagin
2016-07-08  3:00                   ` Andrew Vagin
2016-07-08  3:26                     ` James Bottomley
2016-07-08  5:26                       ` W. Trevor King
2016-07-08  6:16                         ` W. Trevor King
2016-07-08  6:54                         ` Andrew Vagin
2016-07-08  7:18                           ` W. Trevor King
2016-07-08  5:41                       ` [CRIU] " Andrei Vagin
2016-07-08  5:47                         ` Andrei Vagin
2016-07-08  6:07                         ` James Bottomley
2016-07-08 11:17                       ` Michael Kerrisk (man-pages)
2016-07-08  3:20                   ` James Bottomley
2016-07-08  6:09                     ` Andrew Vagin
2016-07-08 11:11                 ` Michael Kerrisk (man-pages)
2016-07-09  3:15             ` W. Trevor King [this message]
2016-07-09  3:13               ` Eric W. Biederman
2016-07-10  5:36                 ` [CRIU] " Andrew Vagin
2016-07-10 20:29                   ` Eric W. Biederman
2016-07-10 21:06                     ` James Bottomley
2016-07-11 20:55                       ` Andrew Vagin

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