linux-kernel - Re: [RFC] fix devpts mount behavior

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Message-ID: <m139azpn2n.fsf@fess.ebiederm.org>
Date:	Sat, 28 Jan 2012 12:52:00 -0800
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Serge Hallyn <serge.hallyn@...onical.com>
Cc:	Kay Sievers <kay.sievers@...y.org>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	containers@...ts.linux-foundation.org,
	Dave Hansen <haveblue@...ibm.com>,
	linux-kernel@...r.kernel.org, Andy Whitcroft <apw@...onical.com>,
	sukadev@...ux.vnet.ibm.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [RFC] fix devpts mount behavior

Serge Hallyn <serge.hallyn@...onical.com> writes:

> Quoting Kay Sievers (kay.sievers@...y.org):
>> We might also thing about changing /sys/class/tty/ptmx/, and have the
>> kernel create the symlink? The loops through userspace to setup
>> default kernel stuff are kind of crazy ...
>> 
>> Kay
>
> Hi Kay,
>
> sorry, there is something I'm missing here.  Without a target kobj
> to link to, how would we go about telling the kernel that /dev/ptmx
> should be a symlink to /dev/pts/ptmx?  Is there a way to do that?

There is precedent in the /dev/fd symlinks, so I expect you want
to look and see where the configuration for that comes from.

Eric
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