netdev - Re: [PATCH 2/8] user_ns: Introduce user_nsmap_uid and user_ns_map

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Message-ID: <4C173389.1010000@openvz.org>
Date:	Tue, 15 Jun 2010 12:02:17 +0400
From:	Pavel Emelyanov <xemul@...nvz.org>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	David Miller <davem@...emloft.net>
CC:	Serge Hallyn <serue@...ibm.com>,
	Linux Containers <containers@...ts.osdl.org>,
	Daniel Lezcano <daniel.lezcano@...e.fr>, netdev@...r.kernel.org
Subject: Re: [PATCH 2/8] user_ns: Introduce user_nsmap_uid and user_ns_map_gid.

On 06/13/2010 05:28 PM, Eric W. Biederman wrote:
> 
> Define what happens when a we view a uid from one user_namespace
> in another user_namepece.
> 
> - If the user namespaces are the same no mapping is necessary.
> 
> - For most cases of difference use overflowuid and overflowgid,
>   the uid and gid currently used for 16bit apis when we have a 32bit uid
>   that does fit in 16bits.  Effectively the situation is the same,
>   we want to return a uid or gid that is not assigned to any user.
> 
> - For the case when we happen to be mapping the uid or gid of the
>   creator of the target user namespace use uid 0 and gid as confusing
>   that user with root is not a problem.
> 
> Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com>

I suppose this one should go via Andrew, not Dave.

Anyway, Acked-by: Pavel Emelyanov <xemul@...nvz.org>
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