Messages in this thread | | | From | (Eric W. Biederman) | Date | Fri, 05 Dec 2008 09:17:09 -0800 | Subject | Re: [PATCH 2/2] user namespaces: require cap_set{ug}id for CLONE_NEWUSER |
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"Serge E. Hallyn" <serue@us.ibm.com> writes:
>> Personally the user namespace only becomes interesting when we >> start to be able to move in the other direction and remove the >> set of capabilities requires to create it. >> >> Eric > > Agreed. Now the thing is I don't think we need full userns > support to get there. We just need the targeted capabilities > and the basic dummy fs support - that is, init_user_ns owns > all vfsmounts, and anyone not in init_user_ns only gets > user other access to files under those mounts.
Right.
> Of course complete support for targeted caps will in itself > be a huge effort :) > > So my roadmap is: next address the per-user keyring, then > the targeted caps.
Sounds good.
I expect this means we will pass through a period where the user namespace is less useful than it is today. But as it will be on a much firmer foundation that is fine.
Eric
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