Re: xattr support in cgroupfs

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On 4/29/2011 4:05 PM, Matthew Ife wrote:
> I was wondering what peoples' thoughts where on doing this.

It's a good idea. Make it so.


> At the moment cgroupfs does not support xattrs so no labelling of selinux
> types is permitted, but since /proc and other pseudo filesystems support
> it this should be possible.
>
> There are a number of use-cases which would benefit from this. For
> example I have recently been working with application layer integration
> of libcgroup with other services (apache being able to switch
> cgroups for vhosts for example) because cgroups offer an excellent means
> of offering resource control to prevent abuse of resources.
>
> Aa a typical example i'd like to be able to label some cgroups in
> cgroupfs as "httpd_cgroup_t" / "httpd_cgroup_task_t" so that I can
> control the access of the files it creates for administering tasks and
> altering what goes in the task list. But currently I must give httpd_t
> complete access to cgroup_t files. I can use DAC effectively enough to
> limit access but without SELinux backing me up it makes me feel somewhat
> naked.
>
> As a matter of fact, I started patching libcgroup to support labelling
> cgroupfs without realizing this facility is unsupported! So I have about
> 70% of an effective patch to do this work properly within libcgroup too.
>
> I welcome peoples' thoughts on this idea.
>
>
>
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