From mboxrd@z Thu Jan  1 00:00:00 1970
From: ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org (Eric W. Biederman)
Subject: Re: [PATCH 4/6] user namespaces: add user_ns to super block
Date: Fri, 01 Aug 2008 18:49:34 -0700
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To: "Serge E. Hallyn" <serue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: Linux Containers <containers-qjLDD68F18O7TbgM5vRIOg@public.gmane.org>, "Eric W. Biederman" <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
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"Serge E. Hallyn" <serue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org> writes:

> Ok I wasn't thinking right.  We still can't get to a user_ns from
> an inode *.
>
> So playing with this a bit tonight, it seems like the best way
> to pass the user_namespace up to the fs is just to define new
> super_operations which handle the conversions.  Something like
> the following.

I'm pretty certain you want to pass in the entire inode instead
of just inode->i_uid.  That would allow you to pass one less argument
and give the filesystems more information to work with.

Eric