Re: [RFC PATCH v2 00/13] SELinux support for Infiniband RDMA

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On 4/11/2016 3:12 PM, Jason Gunthorpe wrote:
> On Thu, Apr 07, 2016 at 02:33:45AM +0300, Dan Jurgens wrote:
> 
>> Currently there is no way to provide granular access control to an Infiniband
>> fabric.  By providing an ability to restrict user access to specific virtual
>> subfabrics administrators can limit access to bandwidth and isolate users on
>> the fabric.
> 
> Do you actually have a concrete use case for this?

We know the national labs are interested in this.

> This seems superficially similar to netlabel, which I guess targets a
> certain niche, but I'm really wondering with all the other container
> patches if this was supposed to be done with namespaces...

I can't speak to the goals of the other container patches.

Netlabel can't label kernel bypassed packets.  It can be used for IPoIB
though.

>> An Infiniband device (ibdev) is labeled by name and port number.  There is a
>> single access vector for ibdevs as well, called "smi".
> 
> This is called an End Port (SMI is something else in the IB
> spec). Please use the standard terminology.
I see your point on the end port, I'll address this is the next series
by updating the commit messages and replacing ibdev with ibendport.

I don't understand where you think I've gone wrong on SMI.

>From section 3.4.5.2: "Each node provides a Subnet Management Agent
(SMA) that the SM access through a well known interface called the
Subnet Management Interface (SMI)."

Thanks,
Dan


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