Re: RFC: Multiple instances of kernel namespaces.

[Eric W. Biederman]

Herbert Poetzl <herbert@xxxxxxxxxxxx> writes:

> On Sat, Jan 21, 2006 at 03:04:16AM -0700, Eric W. Biederman wrote:
>> So in the simple case I have names like:
>> 1178/1632
>
> which is a new namespace in itself, but it doesn't matter
> as long as it uniquely and persistently identifies the
> namespace for the time it exists ... just leaves the
> question how to retrieve a list of all namespaces :)

Yes but the name of the namespace is still in the original pid namespace.
And more importantly to me it isn't a new kind of namespace.

>> If I want a guest that can keep secrets from the host sysadmin I don't
>> want transitioning into a guest namespace to come too easily.
>
> which can easily be achieved by 'marking' the namespace
> as private and/or applying certain rules/checks to the
> 'enter' procedure ...

Right.  The trick here is that you must be able to deny
transitioning into a namespace from the inside the namespace.
Or else a guest could never trust it.  Something one of my
coworkers pointed out to me.

Eric
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