Re: [vserver] Like vps, see network connection for all guests, e.g. vnetstat?

From: Herbert Poetzl <>
Date: Thu 21 Oct 2010 - 10:30:10 BST
Message-ID: <>

On Thu, Oct 21, 2010 at 09:59:50AM +0200, Ghislain wrote:
> > If you have enabled guest privacy in your kernel, the spectator
> > context is essentially useless, and things like this can't
> > really be done without looping through the guests.

> i was wondering about the real thing that guest privacy does.

#define VS_ADMIN_P (0)
#define VS_WATCH_P (0)

> Does it just prevent the spectator context ?

it prevents the spectator context and the admin
functionality in all cases which are privacy
sensitive, which includes:

 - ptrace
 - devmapper
 - devpts
 - inode tag permissions
 - mountinfo
 - kill/signal
 - netlink dumps
 - tun control
 - iopriority

> What security do it bring to the system ?

together with the VXF_STATE_ADMIN it can be
used to secure a guest (to some degree) from
unwanted access from the host admin, of course,
as the admin can change the kernel, this is a
voluntary feature which mostly prevents certain
kinds of accidential peeking or guest modification


> --
> Cordialement,
> Ghislain
Received on Thu Oct 21 10:30:18 2010

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