From: "H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
To: sukadev-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org
Cc: kyle-hoO6YkzgTuCM0SS3m2neIg@public.gmane.org,
sukadev-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org,
bastian-yyjItF7Rl6lg9hUCZPvPmw@public.gmane.org,
containers-qjLDD68F18O7TbgM5vRIOg@public.gmane.org,
xemul-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org,
Alan Cox <alan-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org>,
ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org
Subject: Re: [PATCH 11/11][v3]: Enable multiple instances of devpts
Date: Thu, 04 Sep 2008 10:31:04 -0700 [thread overview]
Message-ID: <48C01B58.2040006@zytor.com> (raw)
In-Reply-To: <20080904171828.GC11174-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
sukadev-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org wrote:
>
> But that node will not be accessible if there is a newinstance mount
> without the bind mount ? IOW
>
> 1. mount -t devpts -o newinstance lxcpts /dev/pts
> 2. mount -o bind /dev/pts/ptmx /dev/ptmx
>
> If both #1 and #2 or neither happen there is no problem.
>
> If #1 is NOT followed by #2, ptys break in new namespace.
>
> An open of /dev/ptmx in this case will allocate a pty in the
> initial namespace, but since #1 is complete, we lookup the
> pty (/dev/pts/7) in the new namespace and fail.
>
That is correct.
-hpa
next prev parent reply other threads:[~2008-09-04 17:31 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-04 5:27 [PATCH 0/11][v3]: Enable multiple mounts of devpts sukadev-r/Jw6+rmf7HQT0dZR+AlfA
[not found] ` <20080904052718.GA3680-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2008-09-04 5:29 ` [PATCH 1/11][v3]: Move tty lookup/reopen to tty_open sukadev-r/Jw6+rmf7HQT0dZR+AlfA
2008-09-04 5:30 ` [PATCH 2/11][v3]: Add an instance parameter devpts interfaces sukadev-r/Jw6+rmf7HQT0dZR+AlfA
2008-09-04 5:31 ` [PATCH 3/11][v3]: Simplify devpts_get_tty() sukadev-r/Jw6+rmf7HQT0dZR+AlfA
2008-09-04 5:32 ` [PATCH 4/11][v3]: Simplify devpts_pty_new() sukadev-r/Jw6+rmf7HQT0dZR+AlfA
2008-09-04 5:32 ` [PATCH 5/11][v3]: Simplify devpts_pty_kill sukadev-r/Jw6+rmf7HQT0dZR+AlfA
2008-09-04 5:33 ` [PATCH 6/11][v3]: Remove devpts_root global sukadev-r/Jw6+rmf7HQT0dZR+AlfA
2008-09-04 5:33 ` [PATCH 7/11][v3]: Per-mount allocated_ptys sukadev-r/Jw6+rmf7HQT0dZR+AlfA
2008-09-04 5:34 ` [PATCH 8/11][v3]: Per-mount 'config' object sukadev-r/Jw6+rmf7HQT0dZR+AlfA
2008-09-04 5:34 ` [PATCH 9/11][v3]: Extract option parsing to new function sukadev-r/Jw6+rmf7HQT0dZR+AlfA
2008-09-04 5:35 ` [PATCH 10/11][v3]: Ability to internally create ptmx sukadev-r/Jw6+rmf7HQT0dZR+AlfA
2008-09-04 5:35 ` [PATCH 11/11][v3]: Enable multiple instances of devpts sukadev-r/Jw6+rmf7HQT0dZR+AlfA
[not found] ` <20080904053551.GL3680-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2008-09-04 6:38 ` H. Peter Anvin
[not found] ` <48BF8283.7040601-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2008-09-04 15:54 ` sukadev-r/Jw6+rmf7HQT0dZR+AlfA
[not found] ` <20080904155431.GA11174-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2008-09-04 16:02 ` H. Peter Anvin
[not found] ` <48C00698.8050803-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2008-09-04 16:25 ` Alan Cox
[not found] ` <20080904172542.3ad7bb85-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org>
2008-09-04 16:48 ` H. Peter Anvin
[not found] ` <48C01163.1050704-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2008-09-04 17:18 ` sukadev-r/Jw6+rmf7HQT0dZR+AlfA
[not found] ` <20080904171828.GC11174-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2008-09-04 17:31 ` H. Peter Anvin [this message]
[not found] ` <48C01B58.2040006-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2008-09-05 2:01 ` sukadev-r/Jw6+rmf7HQT0dZR+AlfA
[not found] ` <20080905020131.GA17535-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2008-09-05 2:08 ` H. Peter Anvin
2008-09-05 12:27 ` Alan Cox
[not found] ` <20080905132710.50018aef-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org>
2008-09-05 17:24 ` H. Peter Anvin
[not found] ` <48C16B42.7030103-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2008-09-05 19:44 ` sukadev-r/Jw6+rmf7HQT0dZR+AlfA
[not found] ` <20080905194450.GA18119-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2008-09-06 14:05 ` H. Peter Anvin
[not found] ` <48C28E3D.6060404-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2008-09-06 21:45 ` sukadev-r/Jw6+rmf7HQT0dZR+AlfA
2008-09-04 16:08 ` [PATCH 0/11][v3]: Enable multiple mounts " sukadev-r/Jw6+rmf7HQT0dZR+AlfA
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