Re: [Xen-devel] [PATCH 4/5] flask/policy: xenstore stubdom policy

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Mon, May 23, 2016 at 11:05:32AM -0400, Daniel De Graaf wrote:
> This adds the xenstore_t type to the example policy for use by a
> xenstore stub domain.

Is there a link somewhere or docs that oultines how to how
create/build such stub domain? The docs/misc/stubdom.txt sadly does not
have any data?

> 
> Signed-off-by: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>
> ---
>  tools/flask/policy/modules/modules.conf |  3 +++
>  tools/flask/policy/modules/xenstore.te  | 21 +++++++++++++++++++++
>  2 files changed, 24 insertions(+)
>  create mode 100644 tools/flask/policy/modules/xenstore.te
> 
> diff --git a/tools/flask/policy/modules/modules.conf 
> b/tools/flask/policy/modules/modules.conf
> index 2dfc011..8ffd00e 100644
> --- a/tools/flask/policy/modules/modules.conf
> +++ b/tools/flask/policy/modules/modules.conf
> @@ -33,6 +33,9 @@ nomigrate = on
>  # Example device policy.  Also see policy/device_contexts.
>  nic_dev = on
>  
> +# Xenstore stub domain.
> +xenstore = on
> +
>  # Allow all domains to use system_u:system_r: instead of requiring explicit
>  # roles.  This is not required for dom0_t, domU_t, and dm_dom_t.
>  default_role = on
> diff --git a/tools/flask/policy/modules/xenstore.te 
> b/tools/flask/policy/modules/xenstore.te
> new file mode 100644
> index 0000000..2ae7a1d
> --- /dev/null
> +++ b/tools/flask/policy/modules/xenstore.te
> @@ -0,0 +1,21 @@
> +################################################################################
> +#
> +# Xenstore stubdomain
> +#
> +################################################################################
> +declare_singleton_domain(xenstore_t)
> +create_domain(dom0_t, xenstore_t)
> +manage_domain(dom0_t, xenstore_t)
> +
> +# Xenstore requires the global VIRQ for domain destroy operations
> +allow dom0_t xenstore_t:domain set_virq_handler;
> +# Current xenstore stubdom uses the hypervisor console, not "xl console"
> +allow xenstore_t xen_t:xen writeconsole;
> +# Xenstore queries domaininfo on all domains
> +allow xenstore_t domain_type:domain getdomaininfo;
> +
> +# As a shortcut, the following 3 rules are used instead of adding a 
> domain_comms
> +# rule between xenstore_t and every domain type that talks to xenstore
> +create_channel(xenstore_t, domain_type, xenstore_t_channel)
> +allow event_type xenstore_t: event bind;
> +allow xenstore_t domain_type:grant { map_read map_write unmap };
> -- 
> 2.5.5
> 

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