Re: F20 System Wide Change: Enable SELinux Labeled NFS Support

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On 07/25/2013 10:57 AM, James Hogarth wrote:
> On 25 Jul 2013 14:36, "Daniel P. Berrange" <berrange@xxxxxxxxxx 
> <mailto:berrange@xxxxxxxxxx>> wrote:
>>> Updated testing section on
>>> 
>>> https://fedoraproject.org/wiki/Changes/LabeledNFS
>> 
>> Feature looks good to me now.
>> 
> 
> A few bits that come to immediate mind:
> 
> Are the labels applied following the semanage fcontext rules from server
> or client side..  Or can either do this?
> 
Labels are applied based on the client rules.  Which does bring up an
interesting idea of what happens if the server initiates a relabel.
Theoretically the server should not even need to be enabled for the labeling
to work.  There could be a problem if the client tries to apply a label that
the server does not understand.  But for now we just require both sides to
agree on labels.
> Does root squash have an impact on this?
> 
I hope not.  I would figure if a process is allowed to write to  mount point,
it can assign labels to the mount point.
> Does fedup initiate a full system relabel already and if it doesn't should
> it do so
No and No.
- - and should automatic relabelling take place after the NFS mount target is
> reached if client context configuration has an impact?
> 
> 
> 
No, we only want the labels to be assigned when the user creates content or if
the files on the remote side had lables.  If a file did not have a label the
kernel would assign it file_t.  If the client runs a restorecon it would label
the NFS share based on its path.
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